Castor oil based polyurethane for bridge deckings and related ap

Details Castor oil based polyurethane for bridge deckings and related ap Castor oil based polyurethane for bridge deckings and related ap

1988-09-16

1989-08-22

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

4273881, 4273883, 427393, 4284231, 4284251, 4284255, 524788, 524789, 525130, 528 54, 528 58, 528 65, C08L 7504

Patent

active

048597350

ABSTRACT:
Novel polyurethane formulations especially useful as membranes of the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A comprises castor oil modified with a ketone-formaldehyde condensate and also preferably contains an elastomer. Component B is a modified MDI, being a mixture of diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxyalkylene).

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