Covestro (formerly Bayer) Desmodur I Isophorone Diisocyanate IPDI 4098-71-9

Chemical Name ：3-isocyanatomethylene-3,5,5- Trimethylcyclohexyl isocyanate

alias : 3-Isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate; 5-Isocyanato-1-(isocyanatomethyl)-1,3,3 -trimethylcyclohexane; IPDI

IPDI products contain 75% cis and 25% trans Mixture of isomers.

Physical and chemical properties

Isophorone diisocyanate IPDI is colorless or light yellow liquid:center">Chroma (Hazen)

≤30

hydrolyzed chlorine

≤200 mg／kg

Total Chlorine

≤400 mg／kg

Viscosity (25℃)

UN 2290/2906

Features and Purpose

IPDI is aliphatic isocyanate, isophorone diisocyanate IPDI Also a cycloaliphatic isocyanate, isophorone diisocyanate IPDI is less reactive than aromatic isocyanates and has a lower vapor pressure. The reactivity of the two NCO groups in the isophorone diisocyanate IPDI molecule is different, because the primary NCO in the IPDI molecule is hindered by the cyclohexane ring and the a-substituted methyl group, making the secondary NCO attached to the cyclohexane The reactivity of NCO group is 1.3-2.5 times higher than that of primary NCO; the reaction speed of IPDI and hydroxyl group is 4-5 times faster than that of HDI and hydroxyl group.
Polyurethane resin made of isophorone diisocyanate IPDI has excellent light stability and chemical resistance, and isophorone diisocyanate IPDI is generally used Used in the manufacture of high-grade polyurethane resins such as light-resistant and weather-resistant polyurethane coatings, wear-resistant and hydrolysis-resistant polyurethane elastomers, isophorone diisocyanate IPDI can also be used to manufacture non-yellowing microcellular polyurethane foams.