Strategic Baseby Eurostatecraft
Strategic Base/Strategic materials/HTPB
Strategic-material profile · RESEARCH ALPHA

HTPB

A source-linked European profile of hydroxyl-terminated polybutadiene production, propulsion-grade boundaries, input dependencies, qualification and expansion.

Which European HTPB production is usable for solid propulsion, and what evidence would establish qualified, expandable and uncommitted binder supply?
SB-SMP-0004Version 0.1.0MOVING CURRENTEvidence cutoff 2026-08-28EU-27 + United Kingdom + Norway + Switzerland + Serbia + Türkiye

Two production sites are evidenced; propulsion-qualified tonnes are not.

As of 2026-08-28
Comparable current qualified HTPB capacityUNKNOWN

Official records disclose maximum cells of 12,000 t/y at Marl and 2,100 t/y at Ravenna, but neither source splits current propulsion-qualified capacity from broader HTPB or liquid-polybutadiene scope.

Current merchant-oriented qualified HTPB capacityUNKNOWN

Evonik and Resin Solutions both maintain customer-facing product channels; public evidence does not reveal qualified customer allocation or available headroom.

Uncommitted qualified binderUNKNOWN

The retained sources do not join product grade, current output, utilisation, programme approval, customer commitments, inventories and allocatable tonnes.

Capacity composition unavailable UNKNOWN

Comparable current propulsion-qualified HTPB capacity. Two official maximum cells are disclosed, but current output and the propulsion-qualified share of each cell are not.

Inference boundary. Two official maximum cells are disclosed, but current output and the propulsion-qualified share of each cell are not. The 14.1 kt/y sum of two authorised maxima is retained as a transparency observation only. It is not current output, complete European capacity, aerospace-grade capacity, ML8-grade capacity or programme-approved supply.
01 · Material role

The strategic object is an accepted binder system, not generic liquid polybutadiene.

Polymer properties, cure chemistry, formulation and motor qualification separate a chemical product from a usable propellant input.

  1. 01 · InputsButadiene + initiator + solventFeedstock purity, hydrogen peroxide, solvent handling and polymerisation controls.
  2. 02 · PolymerHTPB synthesisMolecular distribution, hydroxyl functionality, hydroxyl value, viscosity and batch consistency.
  3. 03 · FormulationAP + HTPB + aluminium + additivesMixing, casting and cure chemistry create a composite propellant grain.
  4. 04 · Qualified outputPropellant grain → motorMechanical, ballistic and programme acceptance remain downstream gates.

Propulsion-suitable HTPB

HTPB can provide the polymeric binder matrix in composite solid propellants, carrying oxidiser, metal fuel and additives while contributing mechanical and processing properties to the cured motor grain.

Generic or industrial HTPB

Generic liquid HTPB, industrial sealant grades, aerospace-branded grades, the EU ML8-defined subset, programme-approved binder and cured propellant are distinct states. A plant's total HTPB ceiling is not automatically propulsion-qualified capacity.

Profile scopeEU-27 + United Kingdom + Norway + Switzerland + Serbia + Türkiye. Exclusions: Russia; Belarus; Polybutadiene plants without explicit HTPB production evidence; Industrial HTPB capacity presented as programme-qualified capacity; Distributors without evidenced production; Downstream propellant or motor tonnes presented as binder capacity. This is a bounded public-source map, not a complete producer census or qualification register. Absence from the profile does not establish absence of capability, imports or qualified alternatives.
02 · European production base

Marl and Ravenna are evidenced production sites with official maximum cells.

The site map exposes 12,000 and 2,100 t/y ceilings while withholding any propulsion-grade total.

ACTIVE_MERCHANT

Active merchant-facing
Current production is evidenced and an external product channel is explicit; uncommitted qualified volume is not implied.

ACTIVE_CAPTIVE

Active integrated or strategic
Current capability is evidenced inside an integrated or sovereign chain; exclusive captive use is not implied.

CONVERSION

Conversion
An existing industrial asset has a sourced conversion plan but accepted output is not yet evidenced.

PLANNED

Planned
A sourced project or programme exists without evidenced commissioned output.

LEGACY_INACTIVE

Legacy or inactive
Historic capability is retained for lineage but is excluded from the current footprint.

North · 66°NSouth · 35°NWest −12° → East 42°
  1. 1Marl HTPB plant
    Evonik Operations GmbH    DE · ACTIVE MERCHANT
  2. 2Ravenna HTPB plant
    Resin Solutions    IT · ACTIVE MERCHANT
  3. 3Marl HTPB expansion phase to Q2 2027
    Evonik Operations GmbH    DE · PLANNED
  4. 4Ravenna HTPB debottlenecking initiative
    Resin Solutions    IT · PLANNED
Schematic geographic plot, not a border map. Coordinates represent approximate site or city locations, not verified plant-gate points. National programmes without a resolved site are listed in the pipeline but are not assigned coordinates.

Active European HTPB producers retained in the bounded map

Site / controlProfile stateProduction roleCapacity evidenceMarket access
SITE

Marl HTPB plant

Germany · Evonik Operations GmbH

Evonik-operated plant inside the Marl Chemical Park.HTPB-CLM-004HTPB-CLM-005HTPB-CLM-006HTPB-CLM-007HTPB-CLM-008HTPB-CLM-018		 ACTIVE_MERCHANT

Official capacity and current company production evidence are joined to public POLYVEST HT and HT-A product channels; uncommitted qualified tonnes are not inferred.

 POLYVEST hydroxyl-terminated polybutadienes, including an HT-A grade marketed for aerospace propulsion. 12,000 t/yCONFIRMEDPERMITTED CEILING Merchant-facing

Evonik markets HTPB globally and publishes an aerospace grade; programme acceptance and available allocation are undisclosed.

REPORTED
SITE

Ravenna HTPB plant

Italy · Resin Solutions

Operating authorisation transferred to Resin Solutions in March 2024; Avio retains technical and technological responsibility under the retained AIA.HTPB-CLM-011HTPB-CLM-012HTPB-CLM-013HTPB-CLM-014HTPB-CLM-018		 ACTIVE_MERCHANT

Current operator control, authorised HTPB production and a public customer-facing Ravenna production statement are evidenced; exact propulsion grade and allocation remain unknown.

 HTPB produced by radical polymerisation of butadiene; public grade and programme-approval split undisclosed. 2,100 t/yCONFIRMEDPERMITTED CEILING Merchant-facing, grade unresolved

Resin Solutions says Ravenna supports NATO-allied programmes and industrial customers, without naming grades, programmes or quantities.

REPORTED
Capacity reading rule Two official maximum cells are disclosed, but current output and the propulsion-qualified share of each cell are not. Marl's 12,000 t/y and Ravenna's 2,100 t/y are official maximum cells. They are displayed at site level but excluded from current qualified-capacity headlines because product mix, current output, utilisation and programme approval are not disclosed. Ravenna's 1,973 t output is a 2019 historic observation, not current production.
03 · Market structure

Two merchant channels do not reveal qualified allocation or interchangeability.

Published products and NATO-oriented marketing remain upstream of customer and motor approval.

Current merchant-oriented qualified HTPB capacityUNKNOWN

Evonik publishes POLYVEST HT-A for aerospace propulsion and Resin Solutions markets Ravenna HTPB production; neither discloses qualified annual customer allocation.

Current integrated or programme-dedicated HTPB capacityUNKNOWN

Ravenna's official permit records Avio-developed technology and continuing technical responsibility, but this lineage is not evidence of current captive allocation or approval for a named motor.

Current strategic finding · INFERRED

At least two European HTPB production sites are directly evidenced at Marl and Ravenna. Their official maximum cells are 12,000 t/y and 2,100 t/y, but the 14.1 kt/y arithmetic sum is not a strategic-supply total: current output, propulsion-grade share, programme approval, imports, commitments and uncommitted allocation remain unknown. The evidence therefore supports a two-site production map, not a scarcity or sufficiency verdict.

  • The producer map is bounded rather than exhaustive.
  • Both numeric cells are authorised maxima, not accepted output or available supply.
  • No source discloses a propulsion-grade capacity split at either site.
  • Could reverse: Evidence of additional current European propulsion-suitable HTPB production
  • Could reverse: Audited output and allocation data demonstrating broad qualified headroom
  • Could reverse: Qualification records showing that the mapped commercial grades are not accepted by relevant programmes
Live expansion structureBoth mapped producers have live brownfield expansion surfaces. Marl construction targets Q2 2027 and official screening confirms capacity-increasing modifications; Ravenna is included in a global debottlenecking programme. Because neither project publishes a site annual increment or qualified-grade share, they are intervention leads rather than future supply tonnes.
04 · Expansion pipeline

Both producers are investing, but neither publishes a usable site increment.

Marl has a Q2 2027 milestone; Ravenna sits inside a global multi-phase debottlenecking programme.

  1. PLANNED

    Marl HTPB expansion phase to Q2 2027 · Germany

    Further Marl output increase scheduled to come on stream; annual increment and accepted grade mix are undisclosed.

    HTPB-CLM-009HTPB-CLM-010
  2. PLANNED

    Ravenna HTPB debottlenecking initiative · Italy

    Ravenna included in an up-to-$100-million global HTPB expansion initiative; site tonnes and completion remain unknown.

    HTPB-CLM-015

Conversion and planned records

Site / controlProfile stateProduction roleCapacity stateMarket access
PROGRAMME

Marl HTPB expansion phase to Q2 2027

Germany · Evonik Operations GmbH

Evonik company project with official environmental-screening evidence.HTPB-CLM-009HTPB-CLM-010		 PLANNED

Construction and capacity-increasing modifications are evidenced; commissioning and annual increment are not.

 Additional POLYVEST HT production capability and supporting hydrogen-peroxide storage. UNDISCLOSEDUNDISCLOSED Planned merchant expansion

Evonik frames the project around global demand and reliable supply; no qualified allocation is disclosed.

REPORTED
PROGRAMME

Ravenna HTPB debottlenecking initiative

Italy · Resin Solutions

Ravenna workstream inside a company-reported global multi-phase investment initiative.HTPB-CLM-015		 PLANNED

Company-reported debottlenecking and capital work are retained; site increment and commissioning are not established.

 Planned additional HTPB production through debottlenecking and capital investment. UNDISCLOSEDUNDISCLOSED Planned merchant expansion

The global programme serves aerospace, defence and industrial markets; Ravenna-specific allocation is undisclosed.

REPORTED
Pipeline boundary Evonik reports a further Marl increase due in Q2 2027 and official screening confirms capacity-increasing modifications, while Resin Solutions reports a global debottlenecking initiative that includes Ravenna. Neither discloses a site-specific annual increment, commissioned output or propulsion-grade share.
05 · Dependencies & bottlenecks

Grade, cure and motor qualification sit between HTPB capacity and a fielded motor.

The AP–HTPB–aluminium chain is evidenced; exact European supplier-to-programme mappings are not.

REPORTED DEPENDENCY

Butadiene continuity

Marl is backward-integrated to on-site butadiene and Ravenna's authorised process directly polymerises butadiene; source, purity and interruption tolerance remain material.

HTPB-CLM-008HTPB-CLM-012
REPORTED DEPENDENCY

Hydrogen-peroxide initiator

Both retained site chains identify hydrogen peroxide; Marl's 2027 modification includes a larger storage tank and Ravenna uses it as polymerisation initiator.

HTPB-CLM-008HTPB-CLM-010HTPB-CLM-012
PARTIALLY REPORTED

Grade and specification boundary

The EU ML8 definition and Evonik's current POLYVEST brochure expose distinct functionality, hydroxyl-value and viscosity boundaries; a generic HTPB label is insufficient for interchangeability.

HTPB-CLM-001HTPB-CLM-007HTPB-CLM-019
EVIDENCED RELATIONSHIP

AP–HTPB–aluminium formulation

ESA and Roxel evidence HTPB-based composite propellant built from oxidiser, binder, metal and additives and processed by casting or curing routes.

HTPB-CLM-002HTPB-CLM-003
HISTORICALLY OBSERVED

Source-change motor qualification

ESA records a new European binder procurement source introduced through a full-scale production-booster firing, supporting a bounded qualification-friction finding.

HTPB-CLM-017
UNKNOWN

Qualified allocation

Neither producer discloses current grade mix, customer commitments, inventories, programme approvals or uncommitted tonnes.

HTPB-CLM-018
qualified butadiene and initiator→controlled HTPB polymerisation→accepted binder grade→formulation-specific cure system→mixing and casting→grain acceptance→motor qualification→uncommitted allocation
No HTPB scarcity or sufficiency scalar emittedThe retained evidence does not join current output, product-grade split, programme qualification, imports, commitments, inventories and dated motor demand. Two sites and two capacity ceilings do not establish abundance, shortage or fungibility.
06 · Strategic assessment

The evidence closes the production map before it closes the strategic supply question.

The next tranche must resolve grade split, output, commitments and source-change qualification.

V0.1 verdict · INFERRED

At least two European HTPB production sites are directly evidenced at Marl and Ravenna. Their official maximum cells are 12,000 t/y and 2,100 t/y, but the 14.1 kt/y arithmetic sum is not a strategic-supply total: current output, propulsion-grade share, programme approval, imports, commitments and uncommitted allocation remain unknown. The evidence therefore supports a two-site production map, not a scarcity or sufficiency verdict.

INFERRED

Current strategic finding

At least two European HTPB production sites are directly evidenced at Marl and Ravenna. Their official maximum cells are 12,000 t/y and 2,100 t/y, but the 14.1 kt/y arithmetic sum is not a strategic-supply total: current output, propulsion-grade share, programme approval, imports, commitments and uncommitted allocation remain unknown. The evidence therefore supports a two-site production map, not a scarcity or sufficiency verdict.

Confidence HIGH ON SITES MEDIUM ON CURRENT PRODUCT SCOPE

HTPB-CLM-004HTPB-CLM-005HTPB-CLM-011HTPB-CLM-013HTPB-CLM-018HTPB-CLM-020
INFERRED

Live expansion structure

Both mapped producers have live brownfield expansion surfaces. Marl construction targets Q2 2027 and official screening confirms capacity-increasing modifications; Ravenna is included in a global debottlenecking programme. Because neither project publishes a site annual increment or qualified-grade share, they are intervention leads rather than future supply tonnes.

Confidence HIGH ON EXISTENCE LOW ON INCREMENT

HTPB-CLM-009HTPB-CLM-010HTPB-CLM-015
INFERRED

Grade-boundary finding

HTPB name, CAS identity and aerospace branding do not establish the same controlled or programme-qualified object. The 2026 EU list defines one ML8 subset by functionality, hydroxyl value and viscosity, while Evonik publishes POLYVEST HT typical data and a separate HT-A aerospace designation and the Ravenna permit reports generic HTPB.

Confidence HIGH

HTPB-CLM-001HTPB-CLM-007HTPB-CLM-011HTPB-CLM-019
INFERRED

Qualification-friction finding

Changing HTPB procurement source can propagate to full-scale motor testing: ESA's Ariane 5 account records a new European binder source introduced through a production-booster firing. That establishes the mechanism, not a universal current duration or cost.

Confidence HIGH ON MECHANISM LOW ON CURRENT DURATION

HTPB-CLM-017
WITHHELD INSUFFICIENT EVIDENCE

Sufficiency determination

No European HTPB surplus, deficit, bottleneck quantity or twelve-month motor-output loss is emitted because grade-compatible current output, allocation, inventories, imports, qualification and dated demand are not joined.

Confidence HIGH

HTPB-CLM-018HTPB-CLM-020

Intervention points

  1. 01
    Close the grade-by-site capacity split

    Resolve current output, utilisation and capacity by industrial, aerospace, ML8-defined and programme-approved grade at Marl and Ravenna.

    Decision value: Converts two authorised ceilings into a usable qualified-supply baseline.

    HTPB-CLM-004HTPB-CLM-007HTPB-CLM-011HTPB-CLM-019
  2. 02
    Quantify both brownfield increments

    Obtain Marl's Q2 2027 annual increment and Ravenna's site-specific debottlenecking scope, timing and accepted product slate.

    Decision value: Shows whether disclosed investment changes European qualified supply inside the twelve-month frame.

    HTPB-CLM-009HTPB-CLM-010HTPB-CLM-015
  3. 03
    Build the binder qualification matrix

    Map source, grade, cure system and acceptance state by motor family without publishing sensitive formulations.

    Decision value: Locates where chemical capacity fails to become substitutable motor input.

    HTPB-CLM-001HTPB-CLM-017HTPB-CLM-019
  4. 04
    Close allocation and inventory

    Resolve customer commitments, aerospace and defence allocation, shelf-life, strategic inventories and uncommitted merchant tonnes.

    Decision value: Separates operating capacity from purchasable, accepted binder.

    HTPB-CLM-014HTPB-CLM-018
  5. 05
    Stress the upstream input chain

    Map butadiene, hydrogen peroxide, solvent, utilities and hazardous-site constraints for both producers.

    Decision value: Tests whether expansion moves the bottleneck into precursor or site infrastructure.

    HTPB-CLM-008HTPB-CLM-010HTPB-CLM-012

Evidence that can change the call

  1. 01
    What are current HTPB output and utilisation at Marl and Ravenna?

    Would change: The current production baseline.

  2. 02
    What share of each site ceiling can produce propulsion-suitable and programme-approved grades?

    Would change: The qualified-capacity finding.

  3. 03
    Which grades and sources are approved for which European motor families and cure systems?

    Would change: The interchangeability and qualification-friction assessment.

  4. 04
    How much output is committed to industrial, civil-space, tactical and strategic customers?

    Would change: The uncommitted merchant-supply finding.

  5. 05
    What annual increments will the Marl and Ravenna projects deliver, and when will accepted output begin?

    Would change: The expansion and intervention assessment.

  6. 06
    Which non-European HTPB imports are used, stocked or pre-qualified by European programmes?

    Would change: The concentration and disruption counterfactual.

  7. 07
    What shelf-life, storage and retest rules apply to producer and customer inventories?

    Would change: The usable twelve-month buffer.

  8. 08
    Which butadiene, peroxide, solvent, reactor, workforce and permit constraints govern expansion?

    Would change: Expansion lead time and bottleneck migration.

Evidence descent · Appendix

Every number and conclusion runs back to an attributed record.

The page is a deterministic presentation of a repository-only, moving-current publication object. Corrections require a new version and revision-history entry; prior source objects remain in the repository. It creates no released Industrial Network row, migration, public JSON endpoint or new factual authority.

ConfirmedCompany estimateMarket estimateInferredUndisclosed
Profile-local scoped claims (19)
HTPB-CLM-001

The 2026 Common Military List of the European Union defines an ML8 HTPB subset by hydroxyl functionality of 2.2–2.4, hydroxyl value below 0.77 meq/g and viscosity below 47 poise at 30°C.

OBSERVED · Scope: EU military-list grade boundary

Limitation: The control-list definition is not a customer specification, producer approval or proof of programme use.

HTPB-SRC-001
Located evidenceHTPB-SRC-001ML8.e.12 — binders, plasticisers, monomers and polymersThe 2026 EU list defines the controlled HTPB subset by functionality, hydroxyl value and viscosity.
HTPB-CLM-002

ESA's Ariane 5 P230 account gives a composite-propellant formulation of 68% ammonium perchlorate, 18% aluminium and 14% HTPB-based binder or liner.

REPORTED · Scope: Historic Ariane 5 booster formulation example

Limitation: A civil-launcher formulation is not a universal military-motor recipe or current demand observation.

HTPB-SRC-002
Located evidenceHTPB-SRC-002Pages 62–63 — P230 formulation and European binder-source qualificationESA reports the AP/aluminium/HTPB formulation and a full-scale firing used to introduce a new European binder procurement source.
HTPB-CLM-003

Roxel states that its composite propellants are mainly HTPB-based, combine solid oxidiser, organic binder, metal powder and additives, and use cast or extruded-curable processes.

REPORTED · Scope: Current European tactical-propulsion process relationship

Limitation: The capability page does not identify supplier, exact formulation, production quantity or programme qualification.

HTPB-SRC-003
Located evidenceHTPB-SRC-003Composite propellants sectionRoxel identifies mainly HTPB-based composite propellants, their constituent roles and cast or extruded-curable processing.
HTPB-CLM-004

A 2023 Münster permitting decision raises Marl operating unit BE02's maximum HTPB capacity from 10,000 to 12,000 t/y and reports 25,200 t/y total liquid-polybutadiene capacity across BE01 and BE02.

OBSERVED · Scope: Marl authorised product-line maxima

Limitation: Only the 12,000 t/y BE02 cell is retained for HTPB. The 25,200 t/y site total includes broader liquid polybutadiene and is not propulsion-grade capacity or output.

HTPB-SRC-004
Located evidenceHTPB-SRC-004Pages 1, 3 and 16 — BE02 HTPB capacity and liquid-polybutadiene site scopeThe official decision records BE02's increase to a 12,000 t/y HTPB maximum and distinguishes the wider 25,200 t/y liquid-polybutadiene site total.
HTPB-CLM-005

Evonik reported in February 2026 that the Marl HTPB expansion was completed in 2024.

REPORTED · Scope: Current installed-state corroboration for Marl

Limitation: The company release does not publish output, utilisation, grade split or customer allocation.

HTPB-SRC-005
Located evidenceHTPB-SRC-005Opening bullets and paragraphs 1–3Evonik reports the 2024 Marl expansion completed and a further output increase under construction for Q2 2027, without annual tonnes or grade split.
HTPB-CLM-006

Evonik markets POLYVEST HT-A as an HTPB grade for aerospace applications, especially solid and hybrid rocket propellants.

REPORTED · Scope: Current Evonik aerospace product positioning

Limitation: Aerospace positioning does not establish ML8 status, customer qualification, sales volume or uncommitted supply.

HTPB-SRC-006
Located evidenceHTPB-SRC-006POLYVEST HT-A product entryEvonik positions HT-A for aerospace solid and hybrid rocket propellants.
HTPB-CLM-007

Evonik's current POLYVEST brochure reports for POLYVEST HT mean molar mass around 2,900 g/mol, hydroxyl functionality around 2.4, hydroxyl number 44–51 mg KOH/g (0.78–0.91 meq/g) and viscosity of 4,000–5,500 mPa·s at 30°C; it identifies HT-A as the aerospace grade.

OBSERVED · Scope: Published POLYVEST HT typical specification and HT-A grade boundary

Limitation: Typical data are not a certificate of analysis or programme-acceptance specification.

HTPB-SRC-007
Located evidenceHTPB-SRC-007POLYVEST product range and HT product portfolio tablesThe brochure provides POLYVEST HT molar mass, functionality, hydroxyl number and viscosity data, identifies HT-A as the aerospace grade and lists rocket-propellant use.
HTPB-CLM-008

Evonik describes Marl HTPB production as backward-integrated because butadiene is produced at the site and hydrogen peroxide is supplied by the group.

REPORTED · Scope: Marl upstream integration

Limitation: Integration does not establish uninterrupted supply, spare capacity or alternative-source qualification.

HTPB-SRC-008
Located evidenceHTPB-SRC-008Paragraphs on backward integrationEvonik says butadiene is produced at Marl and hydrogen peroxide is supplied within the group.
HTPB-CLM-009

Evonik reported construction under way for a further significant increase at Marl scheduled to come on stream in Q2 2027.

REPORTED · Scope: Marl future expansion milestone

Limitation: No annual increment, grade split or commissioning evidence is disclosed.

HTPB-SRC-005
Located evidenceHTPB-SRC-005Opening bullets and paragraphs 1–3Evonik reports the 2024 Marl expansion completed and a further output increase under construction for Q2 2027, without annual tonnes or grade split.
HTPB-CLM-010

A May 2026 German environmental-screening notice confirms capacity-increasing BE02 modifications at Marl and a larger hydrogen-peroxide storage tank.

OBSERVED · Scope: Official Marl expansion-process evidence

Limitation: The notice does not quantify the annual increment or establish accepted output.

HTPB-SRC-009
Located evidenceHTPB-SRC-009Page 1 — BE02 modifications and hydrogen-peroxide storageThe official screening notice confirms capacity-increasing plant modifications and a larger peroxide tank.
HTPB-CLM-011

Ravenna's 2023 integrated environmental authorisation reports maximum HTPB capacity of 2,100 t/y and 2019 output of 1,973 tonnes.

OBSERVED · Scope: Ravenna authorised maximum and historic output

Limitation: The maximum is not current output or qualified capacity; 2019 output is historic and the grade mix is undisclosed.

HTPB-SRC-010
Located evidenceHTPB-SRC-010Annex 1, section C1.2, pages 18–20Ravenna's AIA records 2,100 t/y maximum capacity, 1,973 tonnes 2019 output, polymerisation inputs and Avio technical responsibility.
HTPB-CLM-012

The Ravenna authorisation describes radical polymerisation of butadiene using hydrogen peroxide initiator and ethanol solvent and states that Avio developed the technology and retains technical and technological responsibility.

OBSERVED · Scope: Ravenna process and technical lineage

Limitation: Technical lineage does not establish a current Avio purchase, named motor approval or captive allocation.

HTPB-SRC-010
Located evidenceHTPB-SRC-010Annex 1, section C1.2, pages 18–20Ravenna's AIA records 2,100 t/y maximum capacity, 1,973 tonnes 2019 output, polymerisation inputs and Avio technical responsibility.
HTPB-CLM-013

ARPAE transferred Ravenna's HTPB operating authorisation to Resin Solutions in March 2024.

OBSERVED · Scope: Current Ravenna operator control

Limitation: A permit transfer establishes operator control, not output, product grade or customer allocation.

HTPB-SRC-011
Located evidenceHTPB-SRC-011Decision heading and dispositive transfer sectionARPAE transfers the Ravenna authorisation to Resin Solutions.
HTPB-CLM-014

Resin Solutions describes Ravenna as European HTPB production supporting NATO-allied programmes and global industrial customers.

REPORTED · Scope: Current company-reported Ravenna market role

Limitation: The company page does not name a programme, grade, annual volume, qualification status or uncommitted allocation.

HTPB-SRC-012
Located evidenceHTPB-SRC-012Ravenna facility sectionThe company identifies Ravenna European HTPB production supporting NATO-allied programmes and industrial customers without grades or quantities.
HTPB-CLM-015

Resin Solutions announced debottlenecking and capital investment at Ravenna and Channelview inside an up-to-$100-million global multi-phase HTPB expansion initiative.

REPORTED · Scope: Ravenna expansion-project existence

Limitation: The budget is global; Ravenna increment, site budget, timing, commissioning and grade mix are undisclosed.

HTPB-SRC-013
Located evidenceHTPB-SRC-013Expansion initiative scope and Ravenna workstreamThe announcement includes Ravenna in a global multi-phase debottlenecking and capital programme but gives no site-specific increment.
HTPB-CLM-017

ESA's Ariane 5 account records introduction of a new European binder procurement source through a full-scale production-booster firing.

REPORTED · Scope: Historic HTPB-source qualification mechanism

Limitation: The example does not establish current missile-programme qualification time, cost or test scope.

HTPB-SRC-002
Located evidenceHTPB-SRC-002Pages 62–63 — P230 formulation and European binder-source qualificationESA reports the AP/aluminium/HTPB formulation and a full-scale firing used to introduce a new European binder procurement source.
HTPB-CLM-018

The retained current producer and permit sources establish two active European HTPB sites but do not disclose comparable current output, propulsion-grade capacity or uncommitted qualified tonnes.

INFERRED · Scope: Bounded current supply and allocation check

Limitation: Non-disclosure in public sources is not proof that producers, customers or authorities lack the data.

HTPB-SRC-005HTPB-SRC-010HTPB-SRC-012
Located evidenceHTPB-SRC-005Opening bullets and paragraphs 1–3Evonik reports the 2024 Marl expansion completed and a further output increase under construction for Q2 2027, without annual tonnes or grade split.HTPB-SRC-010Annex 1, section C1.2, pages 18–20Ravenna's AIA records 2,100 t/y maximum capacity, 1,973 tonnes 2019 output, polymerisation inputs and Avio technical responsibility.HTPB-SRC-012Ravenna facility sectionThe company identifies Ravenna European HTPB production supporting NATO-allied programmes and industrial customers without grades or quantities.
HTPB-CLM-019

The EU ML8 definition, Evonik's published POLYVEST HT typical data and its separate HT-A aerospace designation are not identical evidence objects; HTPB identity or aerospace branding alone therefore does not establish ML8 classification or programme interchangeability.

INFERRED · Scope: Public grade-boundary comparison

Limitation: This is not a legal classification of HT-A and does not incorporate confidential specifications, batch certificates or all applicable control-list notes.

HTPB-SRC-001HTPB-SRC-007
Located evidenceHTPB-SRC-001ML8.e.12 — binders, plasticisers, monomers and polymersThe 2026 EU list defines the controlled HTPB subset by functionality, hydroxyl value and viscosity.HTPB-SRC-007POLYVEST product range and HT product portfolio tablesThe brochure provides POLYVEST HT molar mass, functionality, hydroxyl number and viscosity data, identifies HT-A as the aerospace grade and lists rocket-propellant use.
HTPB-CLM-020

The two disclosed maximum cells sum arithmetically to 14,100 t/y, but that sum is neither complete European HTPB capacity nor current propulsion-qualified supply.

INFERRED · Scope: Two-record capacity-transparency observation

Limitation: The values are permitted maxima at different product scopes; they exclude unknown producers and do not report output, utilisation, qualification or allocation.

HTPB-SRC-004HTPB-SRC-010
Located evidenceHTPB-SRC-004Pages 1, 3 and 16 — BE02 HTPB capacity and liquid-polybutadiene site scopeThe official decision records BE02's increase to a 12,000 t/y HTPB maximum and distinguishes the wider 25,200 t/y liquid-polybutadiene site total.HTPB-SRC-010Annex 1, section C1.2, pages 18–20Ravenna's AIA records 2,100 t/y maximum capacity, 1,973 tonnes 2019 output, polymerisation inputs and Avio technical responsibility.
Evidence passages (13)
HTPB-PASS-001

ML8.e.12 — binders, plasticisers, monomers and polymers

The 2026 EU list defines the controlled HTPB subset by functionality, hydroxyl value and viscosity.

HTPB-SRC-001HTPB-CLM-001HTPB-CLM-019
HTPB-PASS-002

Pages 62–63 — P230 formulation and European binder-source qualification

ESA reports the AP/aluminium/HTPB formulation and a full-scale firing used to introduce a new European binder procurement source.

HTPB-SRC-002HTPB-CLM-002HTPB-CLM-017
HTPB-PASS-003

Composite propellants section

Roxel identifies mainly HTPB-based composite propellants, their constituent roles and cast or extruded-curable processing.

HTPB-SRC-003HTPB-CLM-003
HTPB-PASS-004

Pages 1, 3 and 16 — BE02 HTPB capacity and liquid-polybutadiene site scope

The official decision records BE02's increase to a 12,000 t/y HTPB maximum and distinguishes the wider 25,200 t/y liquid-polybutadiene site total.

HTPB-SRC-004HTPB-CLM-004HTPB-CLM-020
HTPB-PASS-005

Opening bullets and paragraphs 1–3

Evonik reports the 2024 Marl expansion completed and a further output increase under construction for Q2 2027, without annual tonnes or grade split.

HTPB-SRC-005HTPB-CLM-005HTPB-CLM-009HTPB-CLM-018
HTPB-PASS-006

POLYVEST HT-A product entry

Evonik positions HT-A for aerospace solid and hybrid rocket propellants.

HTPB-SRC-006HTPB-CLM-006
HTPB-PASS-007

POLYVEST product range and HT product portfolio tables

The brochure provides POLYVEST HT molar mass, functionality, hydroxyl number and viscosity data, identifies HT-A as the aerospace grade and lists rocket-propellant use.

HTPB-SRC-007HTPB-CLM-007HTPB-CLM-019
HTPB-PASS-008

Paragraphs on backward integration

Evonik says butadiene is produced at Marl and hydrogen peroxide is supplied within the group.

HTPB-SRC-008HTPB-CLM-008
HTPB-PASS-009

Page 1 — BE02 modifications and hydrogen-peroxide storage

The official screening notice confirms capacity-increasing plant modifications and a larger peroxide tank.

HTPB-SRC-009HTPB-CLM-010
HTPB-PASS-011

Decision heading and dispositive transfer section

ARPAE transfers the Ravenna authorisation to Resin Solutions.

HTPB-SRC-011HTPB-CLM-013
HTPB-PASS-012

Ravenna facility section

The company identifies Ravenna European HTPB production supporting NATO-allied programmes and industrial customers without grades or quantities.

HTPB-SRC-012HTPB-CLM-014HTPB-CLM-018
HTPB-PASS-013

Expansion initiative scope and Ravenna workstream

The announcement includes Ravenna in a global multi-phase debottlenecking and capital programme but gives no site-specific increment.

HTPB-SRC-013HTPB-CLM-015
Public source register (13)
HTPB-SRC-001

Common Military List of the European Union adopted on 23 February 2026

Council of the European Union · 13 March 2026

OFFICIAL EU CONTROL LIST · accessed 2026-08-28

Open public source →
  • ML8.e.12 — binders, plasticisers, monomers and polymersThe 2026 EU list defines the controlled HTPB subset by functionality, hydroxyl value and viscosity.
HTPB-SRC-002

ESA Bulletin 104 — Ariane 5 solid-propellant booster development

European Space Agency · Date not published

OFFICIAL PROGRAMME TECHNICAL HISTORY · accessed 2026-08-28

Open public source →
  • Pages 62–63 — P230 formulation and European binder-source qualificationESA reports the AP/aluminium/HTPB formulation and a full-scale firing used to introduce a new European binder procurement source.
HTPB-SRC-003

Expertise — composite propellants

Roxel · Date not published

FIRST PARTY PROCESS AND CAPABILITY PROFILE · accessed 2026-08-28

Open public source →
  • Composite propellants sectionRoxel identifies mainly HTPB-based composite propellants, their constituent roles and cast or extruded-curable processing.
HTPB-SRC-004

Genehmigungsbescheid — Evonik Operations GmbH, POLYVEST HT plant

Bezirksregierung Münster · 31 August 2023

OFFICIAL OPERATING PERMIT · accessed 2026-08-28

Open public source →
  • Pages 1, 3 and 16 — BE02 HTPB capacity and liquid-polybutadiene site scopeThe official decision records BE02's increase to a 12,000 t/y HTPB maximum and distinguishes the wider 25,200 t/y liquid-polybutadiene site total.
HTPB-SRC-005

Evonik expands global production of hydroxyl-terminated polybutadienes

Evonik · 6 February 2026

FIRST PARTY EXPANSION ANNOUNCEMENT · accessed 2026-08-28

Open public source →
  • Opening bullets and paragraphs 1–3Evonik reports the 2024 Marl expansion completed and a further output increase under construction for Q2 2027, without annual tonnes or grade split.
HTPB-SRC-006

Aerospace Fuels

Evonik · Date not published

FIRST PARTY PRODUCT PROFILE · accessed 2026-08-28

Open public source →
  • POLYVEST HT-A product entryEvonik positions HT-A for aerospace solid and hybrid rocket propellants.
HTPB-SRC-007

Discover our world of liquid polybutadienes — POLYVEST full-range brochure

Evonik Operations · Date not published

FIRST PARTY PRODUCT SPECIFICATION · accessed 2026-08-28

Open public source →
  • POLYVEST product range and HT product portfolio tablesThe brochure provides POLYVEST HT molar mass, functionality, hydroxyl number and viscosity data, identifies HT-A as the aerospace grade and lists rocket-propellant use.
HTPB-SRC-008

Evonik to increase production capacities for hydroxyl-terminated polybutadienes

Evonik · 10 January 2024

FIRST PARTY EXPANSION ANNOUNCEMENT · accessed 2026-08-28

Open public source →
  • Paragraphs on backward integrationEvonik says butadiene is produced at Marl and hydrogen peroxide is supplied within the group.
HTPB-SRC-009

Bekanntmachung § 5 UVPG — Evonik Operations 0008-26

UVP-Verbund / Bezirksregierung Münster · 20 May 2026

OFFICIAL ENVIRONMENTAL SCREENING NOTICE · accessed 2026-08-28

Open public source →
  • Page 1 — BE02 modifications and hydrogen-peroxide storageThe official screening notice confirms capacity-increasing plant modifications and a larger peroxide tank.
HTPB-SRC-010

DET-AMB-2023-1405 — Ravenna integrated environmental authorisation review

ARPAE Emilia-Romagna · 20 March 2023

OFFICIAL INTEGRATED ENVIRONMENTAL AUTHORISATION · accessed 2026-08-28

Open public source →
  • Annex 1, section C1.2, pages 18–20Ravenna's AIA records 2,100 t/y maximum capacity, 1,973 tonnes 2019 output, polymerisation inputs and Avio technical responsibility.
HTPB-SRC-011

DET-AMB-2024-1556 — Ravenna authorisation transfer to Resin Solutions

ARPAE Emilia-Romagna · 18 March 2024

OFFICIAL PERMIT TRANSFER · accessed 2026-08-28

Open public source →
  • Decision heading and dispositive transfer sectionARPAE transfers the Ravenna authorisation to Resin Solutions.
HTPB-SRC-012

Facilities — Ravenna, Italy

Resin Solutions · Date not published

FIRST PARTY FACILITY PROFILE · accessed 2026-08-28

Open public source →
  • Ravenna facility sectionThe company identifies Ravenna European HTPB production supporting NATO-allied programmes and industrial customers without grades or quantities.
HTPB-SRC-013

Resin Solutions announces commencement of up to $100 million global HTPB production expansion initiative

Resin Solutions · 11 November 2025

FIRST PARTY EXPANSION ANNOUNCEMENT · accessed 2026-08-28

Open public source →
  • Expansion initiative scope and Ravenna workstreamThe announcement includes Ravenna in a global multi-phase debottlenecking and capital programme but gives no site-specific increment.

Revision history

DateVersionChange
2026-08-280.1.0Initial moving-current HTPB publication: Marl and Ravenna production records, official maximum cells, grade and qualification boundaries, AP–HTPB–aluminium relationship, upstream inputs and two brownfield expansion surfaces.
Publication boundary. SB-SMP-0004 identifies this analytical publication. It does not create a parallel canonical material identity or add a product to the released Industrial Network. The public Industrial Network remains industrial-network-api-v0.1 over released industrial-network-v0.2.

Strategic Base public-source research · Versioned analytical profile, not a capacity forecast, investment recommendation, procurement recommendation or claim of official endorsement.