Prepolymer compositions derived from liquid methylene...

Details Prepolymer compositions derived from liquid methylene... Prepolymer compositions derived from liquid methylene...

C - Chemistry, Metallurgy

08

G

402/156, 260/455

C08G 18/10 (2006.01) C07C 271/28 (2006.01) C08G 18/12 (2006.01) C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08G 18/76 (2006.01) C08G 18/80 (2006.01)

Patent

CA 2029504

The present invention is a prepolymer or quasi polymer formed from the reaction of a given amount of a diphenyl methane diisocyanate having at least 5 percent of the 2,4'-isomer and polytetramethylene ether glycols having a molecular weight between 150 and 3000. The glycol which may be combined with other polyether or polyester glycols. The resulting NCO-terminated prepolymer or quasi polymer is a liquid which is stable at temperature of 15°C for at least 24 hours.

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