URETHANE ELASTOMER-FORMING COMPOSITION CONTAINING ISOCYANURATE GROUP

摘要

PROBLEM TO BE SOLVED: To provide a urethane elastomer-forming composition that has a low viscosity to be suitable for the casting operation and good reactivity (curability) and can form an elastomer having a very small amount of substances eluted to a fluid by curing the composition.

SOLUTION: In the urethane elastomer-forming composition including (A) a polyisocyanate component and (B) a polyol component, the polyisocyanate component (A) contains (a1) an isocyanurate-modified hexamethylene diisocyanate and (a2) an isocyanate group-terminated prepolymer and the molar ratio of the isocyanate group of HDI in (a1) to the isocyanate group of HDI in (a2) is (a1):(a2)=20:80-50:50; and the polyol component (B) contains at least (b1) a diol or triol having a number average molecular weight of 500 or less.

COPYRIGHT: (C)2011,JPO&INPIT