Polymer compositions and manufacture

Details Polymer compositions and manufacture Polymer compositions and manufacture

C - Chemistry, Metallurgy

08

G

400/110, 402/131

C08G 18/28 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/12 (2006.01) C08L 75/04 (2006.01)

Patent

CA 1183992

Abstract of the Disclosure There are disclosed aqueous dispersions of salts, e.g., tertiary amine salts, of polyamine-extended, aromatic polyisocyanate-based prepolymers having carboxylic groups, especially such dispersions made from prepolymers of polyisocyanates in which the isocyanate groups are on different aromatic rings. These products, as well as, aqueous dispersions of salts of prepolymers of aromatic polyisocyanates can be made from blocked, aromatic polyisocyanate-based prepolymers, particularly oxime-blocked prepolymers. The polymer salts can have sufficient neutralized, carboxylic groups to provide stable, aqueous dispersions, and the dispersions of the polyamine-extended polymers have infinite dilutability with water and excellent resistance to gelling upon freezing and thawing. Carboxylic groups can be supplied to the prepolymers by reactants having two or more groups containing isocyanate-reactive hydrogen atoms employed in making the aromatic isocyanate prepolymers, particularly dihydroxy alkanoic acids. The polymer salts may be stably dispersed in the aqueous medium, even in the absence of substantial amounts of cosolvents, and the aqueous dispersions of the extended prepolymers are useful as, for instance, coatings for solid substrates to provide water resistance. The solvent resistance of coatings made from the polyamine-extended dispersions of polyether-derived prepolymers may be increased by using at least trifunctional amines to extend the prepolymers.

375012

Affiliated with

Also associated with

Rating

Polymer compositions and manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymer compositions and manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymer compositions and manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1171934