Polyurethane coatings for bridge deckings and the like

Details Polyurethane coatings for bridge deckings and the like Polyurethane coatings for bridge deckings and the like

1988-01-07

1988-11-29

Foelak, Morton

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 67, 4284231, 4284258, C08G 1810, C08G 1830

Patent

active

047882697

ABSTRACT:
Novel polyurethane formulations especially useful as membranes for the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A consists essentially of a low-molecular weight polyol, e.g., glycerol; a poly(oxypropylene) triol; and an elastomer. Component B is a special MDI, either a mix of 4,4'- and 2,4'-isomers of diphenylmethane diisocyanate or a mix of 4,4'-diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxypropylene).

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