Polyurethane polymers

Details Polyurethane polymers Polyurethane polymers

1990-04-10

1991-12-24

Welsh, Maurice J.

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...

C08G 1832, C08G 1848

Patent

active

050754084

ABSTRACT:
Polyurethane polymers of 15 to 60% in ethylene oxide content obtained by causing a base polymer, which is comosed of polyethylene glycol of 200 to 600 in average molecular weight and polyalkyl ether polyol which is 500 to 3000 in average molecular weight and in which C=3 or above, to react with polyisocyanate in the range of 20 to 100% of the polyethylene glycol in the base polymer. A chain extending agent may be used together during the reaction. The polymers have high moisture permeability which is 1500 g/m.sup.2.24 hr./20 .mu.or above, a low swelling ratio that is 10% or below, 100% modulus is 30 kg/cm.sup.2 or above, and satisfactory toughness.

REFERENCES:
patent: 4409383 (1983-10-01), Zalucha et al.
patent: 4789720 (1988-12-01), Teffenhart
patent: 4792576 (1988-12-01), Nodelman
patent: 4810582 (1989-03-01), Gould et al.
patent: 4870150 (1989-09-01), Bandlish et al.
patent: 4945149 (1990-07-01), Matsumoto et al.

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