Inhibition of polyurethane hardening

Details Inhibition of polyurethane hardening Inhibition of polyurethane hardening

1982-06-10

1984-02-21

Michl, Paul R.

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...

524759, 524769, 524761, C08K 512

Patent

active

044330898

ABSTRACT:
Elastomeric polyurethanes, e.g. as prepared by reacting diisocyanate-capped, essentially linear polyester or polyether and polyol suitable for cross-linking thereof, are inhibited against undesired hardening in use or storage by including in the polyurethane-forming reactant mixture a plasticizing composition composed of carboxylate having a 200-1,000 molecular weight and at least two monocyclic aryl radicals per molecule and, based on the weight of said carboxylate, 0.1-5% glycol having a 62-500 molecular weight.

REFERENCES:
patent: 2956978 (1960-10-01), Reeves et al.
patent: 3102875 (1963-09-01), Heiss
patent: 3489723 (1970-01-01), Kraft
patent: 3654211 (1972-04-01), Lutz
patent: 4014845 (1977-03-01), Grier et al.

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