Cast elastomers prepared from aminocrotonates

Details Cast elastomers prepared from aminocrotonates Cast elastomers prepared from aminocrotonates

C - Chemistry, Metallurgy

08

G

C08G 18/46 (2006.01)

Patent

CA 2147811

This invention relates to a process for the preparation of cast polyurethane elastomers comprising reacting in an open mold at an isocyanate index of about 90 to about 110 (a) an organic polyisocyanate; (b) an aminocrotonate-terminated polyether having a molecular weight of from about 1200 to about 6500 and having the formula Image wherein A is the m-functional group left by the removal of the hydroxyl groups of a polyether polyol having a number average molecular weight of from 1000 to 6000, R is the difunctional residue of certain aromatic diamines having the formula H2N-R-NH2 such that each free -NH2 group of the aminocrotonate-terminated polyether has a moderated reactivity toward the organic polyisocyanate, as indicated by a gel time of about 60 to about 300 seconds (measured at 90-110°C in the absence of a slower reacting chain extender or crosslinker), and m is a number of from 2 to 8; and (c) a chain extending agent having a molecular weight of from 62 to 400, optionally in admixture with 0 to about 30% by weight, relative to the chain extending agent, of a crosslinking agent having a molecular weight of from 300 to about 500.

Affiliated with

Also associated with

Rating

Cast elastomers prepared from aminocrotonates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cast elastomers prepared from aminocrotonates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cast elastomers prepared from aminocrotonates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1908353