HDI biuret polyisocyanate is a low-monomer aliphatic polyisocyanate resin formed from hexamethylene diisocyanate (HDI) via biuret linkages. It is used as the hardener (crosslinker) in two-component polyurethane coatings that demand weatherability and abrasion resistance
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Hardener/crosslinker for weatherable two-component (2K) polyurethane coatings
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Crosslinks hydroxyl acrylic and polyester resins into high-gloss, abrasion-resistant films
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Automotive-refinish, transportation and industrial-maintenance topcoats
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High-durability wood and protective coatings requiring UV stability
Safety & Handling
Full SDS available on request
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
HDI biurethexamethylene diisocyanate biuretHDI homopolymer (biuret)aliphatic polyisocyanate hardenerComparable to Desmodur N75 / N100Comparable to Tolonate HDBComparable to Duranate 24A-100
Full Description
HDI biuret resins crosslink hydroxyl-functional acrylic and polyester resins to form tough, high-gloss two-component (2K) polyurethane films with excellent UV and weathering durability — the aliphatic backbone is what keeps the cured coating from yellowing on outdoor exposure. They are widely specified in automotive refinish, transportation, industrial-maintenance and high-end wood coatings where gloss retention, chemical resistance and abrasion resistance are required. As a low-free-monomer resin, the biuret grade offers a different viscosity/reactivity balance than the isocyanurate trimer. RawSource supplies HDI biuret polyisocyanate in bulk to coating and CASE formulators
Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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