Aqueous dispersions of polyurethanes which are crosslinkable by

Details Aqueous dispersions of polyurethanes which are crosslinkable by Aqueous dispersions of polyurethanes which are crosslinkable by

1990-04-11

1992-08-04

Welsh, Maurice J.

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522 86, 522 90, 522 98, 524591, 528 75, C08G 1867

Patent

active

051359634

ABSTRACT:
Aqueous dispersions of polyurethanes which are crosslinkable by the action of high energy radiation contain (a) a polyisocyanate, (b) a polyol having a molecular weight of from 400 to 6,000 g/mol, (c) if required, a polyol having a molecular weight of from 62 to 399 g/mol, (d) if required, a polyamine having two or more amino groups which are reactive to isocyanate, (e) if required, an aminoalcohol having one or more amino groups which are reactive to isocyanate, (f) a compound containing ionic groups or groups which can be converted into ionic groups and one or more hydroxyl or amino groups which are reactive to isocyanate (g) if required, a monofunctional polyetheral and (h) a compound having one or more ethylenically unsaturated groups and one or more hydroxyl groups. The compound having an ethylenically unsaturated group (h) is used in amounts corresponding to 0.02-0.08 gram equivalent, based on the polyisocyanate (a), of OH, and the polyurethane, dissolved in dimethylformamide, has a Fikentscher K value greater than 40 or is insoluble in dimethylformamide.

REFERENCES:
patent: 4153778 (1979-05-01), Park et al.
patent: 4314922 (1982-02-01), Lehner et al.
patent: 4339566 (1982-07-01), Rosenkranz
patent: 4722966 (1988-02-01), Flakus

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