Rigid foams prepared from treated toluene diisocyanate residue

Details Rigid foams prepared from treated toluene diisocyanate residue Rigid foams prepared from treated toluene diisocyanate residue

C - Chemistry, Metallurgy

08

J

400/111, 403/44

C08J 9/02 (2006.01) C07C 263/20 (2006.01) C08G 18/00 (2006.01) C08G 18/58 (2006.01) C08G 18/70 (2006.01) C08G 18/72 (2006.01)

Patent

CA 2006371

ABSTRACT A method of treating toluene diisocyanate distillation residues comprising reacting the residues with at least about 0.5 equivalents, based on hydrolyzable chloride concentration of the residues, of an epoxy compound at a temperature of from 155 to 220°C to produce a treated distillation residue having a hydrolyzable chloride level of less than about 800 parts per million (ppm) is taught. The product of the method is useful, for instance, in producing rigid foams with low K Factors.

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