Method of producing hard polyurethane foams

Details Method of producing hard polyurethane foams Method of producing hard polyurethane foams

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2141736

-16- Rigid polyurethane foams are produced by the reaction of 1) polyisocyanates with 2) compounds of a molecular weight of from 92 to 10,000 having at least two hydrogen atoms active towards isocyanates in the presence of 3) hydrofluoroalkanes as foaming agents and of 4) at least one of the following compounds R1-O-CO-O-R2; R1-O-CO-O-CO-O-R2; (see formula one) wherein R1 and R2 signify C1-C12-alkyl or together C2-C6-alkylene and n signifies an integer from 0 to 6, (see formula two) wherein R1 to R3 signify C1-C12-alkyl which is optionally substituted by halogens, C5-C10-cycloalkyl or optionally substituted aryl, -17- Image wherein R1 and R2 signify C1-C16-alkyl or C5-C10-cycloalkyl, Image wherein R signifies C1-C20-alkyl or C5-C10-cycloalkyl, as solubilisers as well as optionally in the presence of 5) other known per se auxiliary substances and additives.

Affiliated with

Also associated with

Rating

Method of producing hard polyurethane foams does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of producing hard polyurethane foams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing hard polyurethane foams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1488003