Polyisocyanate compositions

Details Polyisocyanate compositions Polyisocyanate compositions

C - Chemistry, Metallurgy

08

G

400/109, 402/137

C08G 18/10 (2006.01) C08G 18/38 (2006.01) C08G 18/50 (2006.01) C08G 18/65 (2006.01) C08G 18/66 (2006.01) C08G 18/78 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01)

Patent

CA 1334235

A polyisocyanate composition, suitable for use in the production of elastomers by the RIM process, said composition being the product of reacting an alcohol and/or thiol having an average hydroxyl and/or thiol functionality of from about 1.5 to about 4 and an average hydroxyl and/or thiol equivalent weight of at least 500 with at least 2 equivalents, per hydroxyl and/or thiol equivalent, of an organic polyisocyanate under such conditions that at least about 20 % of the initially formed urethane and/or thiourethane groups are converted to allophanate and/or thioallophanate groups.

580382

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