C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/129, 402/148
C08G 18/42 (2006.01) B65D 53/06 (2006.01) C08G 18/66 (2006.01) C08G 18/67 (2006.01) C08G 18/76 (2006.01)
Patent
CA 1107893
ABSTRACT OF THE DISCLOSURE This invention relates to improved elastomeric polyurethane compositions and seals which show increased resistance to the degrading effects of contact with fluids containing phosphate esters relative to conventional poly- urethane elastomers. The elastomeric composition includes the reaction product of ?,3'-dimethyl-4,4'-diphenyl diiso- cyanate; one or more polycaprolactone polyols; and a chain extender which includes a linear aliphatic compound defining a chain of carbon atoms which includes at least one unsatur- ated carbon-carbon bond and which is terminated at each end with a hydroxyl group. An example of a preferred chain extender is 1,4-dihydroxy-2,3-dibromo-2-butene.
293362
Disogrin Industries Corporation
Osler Hoskin & Harcourt Llp
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