4,4′-Diaminodicyclohexylmethane (PACM) Market

Three stereoisomers share every drum of 4,4′-diaminodicyclohexylmethane (PACM), and the trans,trans form, which melts at 64 to 65.4 degrees Celsius, decides whether the diisocyanate made from it stays liquid on a shelf. 4,4′-Diaminodicyclohexylmethane (PACM) is the ring-hydrogenated form of methylenedianiline (MDA), a cycloaliphatic diamine with two primary amine groups. The 4,4′-diaminodicyclohexylmethane (PACM) market covers merchant and captive PACM sold as a curing agent for epoxy resins, as feedstock for dicyclohexylmethane diisocyanate (H12MDI), and as a monomer for transparent polyamides. Douglas Insights sizes it at USD 286.3 million in 2025, from 36,850 tonnes at an average USD 7.77 per kilogram, and at USD 476.5 million by 2035, a revenue CAGR (compound annual growth rate) of 5.23%. The biggest outlet changed hands when Covestro, maker of the H12MDI brand Desmodur W, and XRG of the Abu Dhabi National Oil Company (ADNOC) closed their transaction on 10 December 2025. The study belongs to our specialty chemicals coverage and follows the Douglas Insights research methodology.

Why are light-stable polyurethane and epoxy floor formulators buying more PACM each year?

PACM tonnage grows 4.06% a year to 2035 in our base case, and light-stable H12MDI polyurethanes supply 1.58 points of it. Epoxy floors and composites add 1.31 points, transparent polyamide optics 0.83 and specialty uses 0.34, so four end markets explain the whole volume leg.

H12MDI polyurethanes: 1.58 points

Phosgenating 4,4′-diaminodicyclohexylmethane (PACM) gives H12MDI, the aliphatic isocyanate behind coatings that keep their gloss outdoors. Covestro describes Desmodur W as a liquid cycloaliphatic diisocyanate with at least 31.8% isocyanate group (NCO) content, used in flooring, roofing, cast elastomers, optical products and adhesives. Each tonne of H12MDI needs 0.802 tonnes of PACM on molecular weights of 210.36 and 262.35. Douglas Insights calculates that 18,420 tonnes of PACM went into about 22,972 tonnes of H12MDI in 2025. The 10 December 2025 closing of the Covestro and XRG partnership came with a EUR 1.17 billion capital increase for a group that reported EUR 14.2 billion of 2024 sales across 46 sites.

Epoxy floors and composites: 1.31 points

Epoxy hardeners add 1.31 points. PACM carries four active amine hydrogens, so its amine hydrogen equivalent weight is 52.6 grams, and a liquid epoxy of 190 grams per equivalent needs about 27.7 parts of PACM per 100 parts of resin. BASF sells PACM as Dicykan, primarily a hardener for epoxy coatings and composites, citing long pot life, heat resistance and colour stability, in 180 kilogram drums or bulk. Our sibling Industrial Floor Coating Market report tracks the floors where those properties sell, and our Epoxy Resin Curing Accelerator Market study covers the additives blended beside PACM.

Transparent polyamide optics: 0.83 points

Transparent polyamides add 0.83 points, the fastest per tonne. A European patent application filed by Arkema identifies Trogamid CX7323 as polyamide PACM.12, made from near-equimolar PACM and dodecanedioic acid, so 52.0% of each repeat unit is PACM by mass. Polyplastics-Evonik, the Daicel and Evonik joint venture, announced on 31 July 2025 that Seiko Optical Products adopted TROGAMID for frames, citing 88% optical transparency.

Specialty uses: 0.34 points

Polyurea, polyamide-imide and adhesive intermediates add the last 0.34 points, on about 2,480 tonnes in 2025. Douglas Insights tallies that slice at USD 20.3 million, sold in drums, where 98% purity often suffices because colour matters less in a dark polyurea liner. The four contributions, 1.58 + 1.31 + 0.83 + 0.34, equal the 4.06% volume leg after the restraints below are netted out.

Which headwinds hold PACM tonnage below its gross 4.78% pace?

Three headwinds remove 0.72 points from PACM volume growth, cutting a gross 4.78% pace to 4.06% a year. Isophorone diamine competes in epoxy hardeners, MDA feedstock hazards raise handling cost, and Chinese H12MDI price cycles squeeze the merchant 4,4′-diaminodicyclohexylmethane trade.

Substitution by isophorone diamine (IPDA) takes 0.36 points. Evonik markets IPDA as the industry standard crosslinker for epoxy composites in rotor blades, pipes and boats, while PACM sits beside it as a second hardener in the same VESTAMIN range. Formulators who need a cheaper, lower-viscosity cycloaliphatic amine choose IPDA first. Price wins there.

Feedstock and hazard handling takes 0.22 points. PACM is made from MDA, and the AICIS evaluation of 14 December 2023 classifies PACM itself as Acute Toxicity 2 by inhalation, fatal if inhaled, and Skin Corrosion 1. Closed transfer, local exhaust ventilation and health monitoring add cost per drum for small coaters.

H12MDI price cycles take 0.14 points. Chinese makers, led by Wanhua, hydrogenate MDA in-house, so merchant PACM sold to independent isocyanate makers loses volume whenever Asian H12MDI prices fall. Douglas Insights reckons the three headwinds leave about 3,919 tonnes of 2035 PACM demand unbuilt.

Which PACM end use leads in 2025: H12MDI feedstock or epoxy hardener?

H12MDI isocyanate feedstock leads PACM revenue with 41.7%, worth USD 119.4 million in 2025, because one large aliphatic polyurethane chain absorbs half of world tonnage. Epoxy curing agents follow at 36.4%, and transparent polyamides grow fastest at 7.38% a year on eyewear and optical parts.

H12MDI isocyanate feedstock for 4,4′-diaminodicyclohexylmethane (PACM) rises from USD 119.4 million to USD 195.6 million at 5.06% a year. Captive feed is cheap. Its price per kilogram is the lowest in the PACM chain because much of it moves as captive transfer inside integrated isocyanate plants.

Epoxy curing agents are worth USD 104.2 million, growing 4.73% a year to USD 165.4 million. Floors, tank linings and composite tooling pay a premium for PACM’s colour stability and long pot life.

Transparent polyamides hold 14.8%, or USD 42.4 million, and grow fastest, at 7.38%, to USD 86.4 million. Eyewear frames, sunglass lenses and medical housings drive the rate, and Evonik’s TROGAMID R, a recycled transparent polyamide launched on 23 January 2026, widens the buyer base.

Other specialty uses take 7.1%, worth USD 20.3 million in 2025, and grow slowest at 3.94% to USD 29.9 million. Polyurea, adhesive and resin intermediate buyers order in small lots.

Which region consumes the most PACM, and why does Asia Pacific add the most tonnes?

Asia Pacific consumes the most PACM, USD 126.8 million in 2025, and grows fastest at 6.17% a year to USD 230.7 million. Chinese H12MDI and epoxy flooring capacity sits there, and Japanese eyewear makers buy transparent polyamides built from 4,4′-diaminodicyclohexylmethane.

Asia Pacific takes roughly 16,321 tonnes of PACM on our split. Wanhua’s own MDA hydrogenation in Yantai and Seiko’s adoption of transparent polyamide frames both sit in the region.

Europe is worth USD 79.0 million in 2025 and grows 4.12% a year to USD 118.3 million. German producers Evonik and BASF anchor supply, Covestro converts PACM into H12MDI, and European coaters remain the largest buyers of drum-grade hardener.

North America holds USD 60.7 million, rising 4.49% a year to USD 94.2 million. Flooring contractors and coatings, adhesives, sealants and elastomers (CASE) formulators buy through distributors such as Gantrade.

Latin America is worth USD 11.7 million, growing 4.95% to USD 19.0 million, mostly epoxy floor and marine coating demand in Brazil and Mexico.

The Middle East and Africa are the wildcard at USD 8.1 million, growing 5.85% a year to USD 14.3 million. Gulf ownership of Covestro raises the odds of an aliphatic isocyanate investment in the region.

Which companies supply PACM, and who converts it into H12MDI?

Three producers, Evonik, Wanhua and BASF, hold an estimated 59.5% of 2025 PACM revenue in the Douglas Insights model, with Evonik the leader at a 23.6% share. Covestro, the main downstream buyer, converts PACM into Desmodur W, and Chinese hydrogenators supply the remainder.

Evonik’s position in 4,4′-diaminodicyclohexylmethane (PACM) rests on two lines. It sells VESTAMIN PACM as a hardener for composites, and it bought Air Products’ Performance Materials Division for USD 3.8 billion in cash, a sale Air Products reported to the SEC on 3 January 2017. Air Products also authored the hydrogenation patents that define the low trans,trans PACM-20 grade.

Wanhua Chemical holds about 19.8% on our estimate. A Univar presentation for its WANNATE hydrogenated MDI (HMDI) line lists 4,000 tonnes a year of hydrogenated MDA (HMDA) in Yantai, equal to 10.9% of 2025 world PACM tonnage, and independently developed MDA hydrogenation technology.

BASF holds about 16.1%, built on Dicykan for epoxy coatings and composites. Covestro is the anchor buyer through Desmodur W, and its move into XRG ownership keeps that outlet funded. Polyplastics-Evonik sells TROGAMID in Japan and Asia, Gantrade distributes PACM for flooring and diisocyanate production, and Arkema holds patent filings on PACM.12 polyamides. Douglas Insights puts the remaining 40.5% with Chinese and Japanese hydrogenators selling 98% and 99% purity grades.

How much does a kilogram of PACM cost in captive transfer, drums and polyamide grade?

PACM sells for an average USD 7.77 per kilogram in 2025 on the Douglas Insights model, inside a band from about USD 6.10 for captive H12MDI feed to USD 9.90 for drummed epoxy grade. Purity, isomer control and pack size decide the spread more than feedstock cost.

Bands for 4,4′-diaminodicyclohexylmethane are Douglas Insights estimates. No exchange quotes PACM. Catalogue listings show why lab packs stay out: a recent 500 gram listing at USD 21 works out at USD 42 per kilogram, while other 500 gram packs list at USD 114 to USD 200. Douglas Insights projects the average to rise 1.12% a year, to USD 8.69 per kilogram by 2035, as polyamide grades gain mix share.

How does the trans,trans isomer share change what a PACM grade can do?

Trans,trans content is the main specification in PACM: about 50% at equilibrium, 20% in the low-trans grade that gives liquid H12MDI, and higher in polyamide grades. Melting points run from 35.7 degrees Celsius for cis,trans to 65.4 degrees for trans,trans, so isomer mix sets handling.

An Air Products hydrogenation patent gives the equilibrium mix of 4,4′-diaminodicyclohexylmethane (PACM) as roughly 50% trans,trans, 43% cis,trans and 7% cis,cis. Material near that ratio, called PACM-50, makes an H12MDI that is solid at room temperature. PACM-20, with about 20% trans,trans, gives a diisocyanate that stays liquid and storage-stable at 20 to 25 degrees Celsius, which is why isocyanate makers target 17% to 24%.

Polyamide makers want the opposite. Clarity needs trans,trans. Nylons made from PACM rich in cis isomers turn cloudy and infusible, while trans,trans-rich PACM gives clear, fusible polymer. Even the liquid H12MDI is sensitive: Covestro notes Desmodur W can start to crystallise at about 25 degrees Celsius and suggests warming drums at 40 to 50 degrees for 16 to 24 hours. Grade by isomer therefore splits PACM into low trans,trans grade, equilibrium grade and high trans,trans grade.

How tightly is PACM supply tied to methylenedianiline hydrogenation capacity?

Every tonne of PACM starts as about 0.94 tonnes of methylenedianiline, hydrogenated under pressure over a metal catalyst, so PACM capacity sits only where MDA output and high-pressure hydrogenation share a site. That ties 4,4′-diaminodicyclohexylmethane supply to a handful of MDA producers.

The 0.94 ratio comes from molecular weights: MDA at 198.27 against PACM at 210.36 after six hydrogen molecules add to the two benzene rings. Ring hydrogenation runs under heavy pressure and needs isomer control, and the Air Products patent record turns on catalyst choice and trans,trans selectivity.

Integration matters. MDA owners win. Wanhua runs MDA, its hydrogenation and HMDI on its own sites, and Evonik and BASF sell PACM from European amine chains. PACM supply therefore responds slowly to price, and Wanhua’s 4,000-tonne HMDA line alone equals 10.9% of world tonnage.

Which hazard rules and food-contact limits apply to PACM handling?

PACM is registered in a band above 1,000 tonnes a year and classed as fatal if inhaled. The band comes from Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) in the European Union (EU), and the class from Australia’s chemicals regulator. Food-contact rules cap migration at 0.05 milligrams per kilogram of food in the EU.

The evaluation by the Australian Industrial Chemicals Introduction Scheme (AICIS), dated 14 December 2023, lists 4,4′-diaminodicyclohexylmethane (PACM) as Skin Corrosion 1, Eye Damage 1, Acute Toxicity 4 by mouth and skin, Acute Toxicity 2 by inhalation and Specific Target Organ Toxicity on repeated exposure, category 2. It does not treat PACM as a skin sensitiser, and it finds the risks manageable with closed systems and ventilation.

The same document records that the US Food and Drug Administration (FDA) allows PACM in polyurethane coatings at up to 1.15% by weight. Under the Globally Harmonized System (GHS) labels above, PACM ships in 180 kilogram steel drums or bulk, and Russia and Belarus set an exposure limit of 2 milligrams per cubic metre.

Which hydrogenated diamines does the PACM study include, and which stay out?

The PACM study includes 3 isomer grades, 4 end uses and 5 regions, valued at first sale or captive transfer of 4,4′-diaminodicyclohexylmethane. It excludes methylated analogues such as MACM, isophorone diamine, finished H12MDI and polyamide resin value, which belong to downstream markets.

Purity grades of 98% and 99% both count. Coverage by isomer grade spans low trans,trans grade, equilibrium grade and high trans,trans grade; by end use it spans H12MDI isocyanate feedstock, epoxy curing agents, transparent polyamides and other specialty uses. Paints that carry PACM-cured binders are covered in our Industrial Liquid Coatings Market report.

What if H12MDI coatings stall: how far does the 2035 PACM figure move?

PACM ends 2035 between USD 404.3 million and USD 559.5 million across our three cases, around a base of USD 476.5 million. Volume decides the spread, because H12MDI feedstock is 41.7% of revenue and the price leg moves by less than one point between cases.

In the slower case, IPDA wins more epoxy hardener business and Chinese H12MDI overcapacity pushes merchant PACM prices down, so tonnage grows 2.71% a year. In the faster case, Covestro’s new XRG ownership funds new aliphatic isocyanate capacity and recycled TROGAMID grades spread, lifting tonnage to 5.38% a year.

Adding one point to yearly tonnage growth lifts 2035 PACM revenue by USD 47.8 million; removing one point cuts it by USD 43.9 million. Six published forecasts for 4,4′-diaminodicyclohexylmethane sit between 3.33% and 8.65% a year, and our 5.23% sits 1.07 points below their 6.30% median because we net out 0.72 points of headwinds.

Douglas Exclusive: the PACM tonnage ledger

The PACM tonnage ledger is a Douglas Insights model built from 11 inputs, each taken from a primary page or published estimate. The inputs are two molecular weights, one NCO specification, one polyamide composition, one isomer equilibrium, one REACH tonnage band and five published 2025 market sizes. It follows every tonne of 4,4′-diaminodicyclohexylmethane into the product it ends up in.

The ledger rows add to 36,850 tonnes and USD 286.3 million. Its cross-check holds: an H12MDI molecular weight of 262.35 implies 32.03% NCO, in line with the 31.8% minimum on the Desmodur W data sheet.

Isocyanates dominate. The finding is that half of all PACM never leaves the isocyanate chain: 50.0% of tonnes but only 41.7% of value, because captive transfer pricing runs USD 1.29 below the average. A single PACM kilogram in a polyamide frame earns 43.5% more than one sent to H12MDI, which is why producers chase polyamide grade.

Which receipts turn 36,850 tonnes of PACM into USD 286.3 million?

Our receipts multiply 36,850 tonnes of 2025 PACM by USD 7.77 per kilogram to reach USD 286.3 million. Tonnage comes from four end-use builds in the ledger, price from four channel bands, and 4.06% volume growth times 1.12% price growth gives 5.23% a year.

The model counts 4,4′-diaminodicyclohexylmethane demand in 27 countries across 5 regions, using 58 data points: 11 sourced inputs and 47 modelled cells. Arithmetic: 36,850 x 7.77 / 1,000 = 286.3; 286.3 x (1.0406 x 1.0112)^10 = 476.5. Volume reaches 54.86 thousand tonnes and price USD 8.69 per kilogram in 2035.

Three cross-checks agree. First, five published 2025 sizes run from USD 164.5 million to USD 530.0 million, with a median of USD 250.0 million; our figure sits 14.5% above that median. Second, the AICIS note puts REACH registration above 1,000 tonnes a year, consistent with our 10,168 tonnes for Europe. Third, Wanhua’s 4,000-tonne HMDA line equals 10.9% of our world tonnage, in line with a 19.8% revenue share once captive HMDI output is added.

Sources

1. Covestro Covestro and XRG commence strategic partnership: transaction successfully closed (2025)
2. Australian Industrial Chemicals Introduction Scheme Evaluation statement EVA00142: Cyclohexanamine, 4,4'-methylenebis- (2023)
3. Evonik Evonik unveils TROGAMID R transparent polyamide made from recycled plastics (2026)
4. Evonik Polyplastics-Evonik announces use of TROGAMID in Seiko Optical Products eyewear (2025)
5. US Securities and Exchange Commission Air Products completes sale of Performance Materials Division to Evonik (Form 8-K exhibit) (2017)
6. BASF Dicykan (4,4'-diaminodicyclohexylmethane) (2025)
7. Covestro Desmodur W technical data sheet (2024)
8. Evonik VESTAMIN diamines (2025)