Moisture resistant polyurethanes derived from non- aromatic...

Details Moisture resistant polyurethanes derived from non- aromatic... Moisture resistant polyurethanes derived from non- aromatic...

C - Chemistry, Metallurgy

08

G

402/141, 402/147

C08G 18/72 (2006.01) C08G 18/38 (2006.01) C08G 18/61 (2006.01) C08G 18/65 (2006.01)

Patent

CA 1262991

MOISTURE RESISTANT POLYURETHANES DERIVED FROM NON-AROMATIC DIISOCYANATES ABSTRACT The reduction in tensile strength exhibited in high humidity environments by "soft" polyurethanes prepared from aliphatic or cycloaliphatic diisocyanates can be substantially reduced if the molar ratio of diisocyanate and chain extender to isocyanate-reactive species other than said chain extender in the reaction mixtures from which said polyurethanes are prepared is at least 4.

520146

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