C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/2018, 260/45
C08G 18/73 (2006.01) C07C 271/08 (2006.01) C08F 285/00 (2006.01) C08G 18/08 (2006.01) C08G 18/63 (2006.01) C08G 18/75 (2006.01) C08G 18/76 (2006.01)
Patent
CA 2019689
- 36 - ACID CONTAINING ISOCYANATE-TERMINATED PREPOLYMERS, SALT PREPOLYMERS AND POLYMERS THEREOF ABSTRACT The present invention is directed to novel isocyanate-terminated prepolymers of carboxylic acid grafted polyethers, salts of these prepolymers and fully reacted polymers formed therefrom. More specifically, the present invention relates to reacting an ethylenically unsaturated mono-carboxylic acid with a polyether in the presence of a free radical initiator to form a graft copolymer. Acid-containing isocyanate- terminated prepolymers can then be formed by reacting the graft copolymer with an isocyanate. Salt-containing isocyanate-terminated prepolymers are prepared through the reaction between the acid-containing prepolymer and a base. Finally, polymers are formed by curing either of these isocyanate-terminated prepolymers with an isocyanate reactive material. D-16,132
Sim & Mcburney
Union Carbide Chemicals And Plastics Company Inc.
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