METHOD FOR PREPARING FLEXIBLE POLYURETHANE FOAM WITH HYDROLYSABLE SILANE COMPOUNDS

摘要

Flexible polyurethane foams are made using certain hydrolysable silane compounds in the foam formulation. The hydrolysable silane compounds contain at least one isocyanate-reactive group and at least one hydrolysable silane group. The presence of the hydrolysable silane compound in the foam formulation leads to improved tensile, tear and elongation properties without an adverse effect on other important foam properties such as resiliency and hysteresis loss.

主权项

1. A process for making a flexible polyurethane foam comprising curing in one or more steps ingredients that include:
a) one or more isocyanate-reactive compounds that contain an average of at least 2 isocyanate-reactive groups per molecule, contain no hydrolysable silane groups and have an equivalent weight per isocyanate-reactive group of at least 200; b) from 1 to 100 parts by weight, per 100 parts by weight of component a), of a polyether monol or polyol having at least one hydrolysable silane group per molecule c) a blowing agent that includes water; and d) at least one organic polyisocyanate compound, wherein 1) some or all of component a), component b) or both can be pre-reacted with the organic polyisocyanate compound(s) to form an isocyanate terminated prepolymer or quasi-prepolymer; and 2) the organic polyisocyanate compound is present in an amount sufficient to provide an isocyanate index of from 70 to 150.