Flexible breathable polyurethane coatings and films, and the pre

Details Flexible breathable polyurethane coatings and films, and the pre Flexible breathable polyurethane coatings and films, and the pre

1988-06-29

1990-07-17

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...

521914, 528 61, 528 66, 528 76, C08G 1810

Patent

active

049422146

ABSTRACT:
The invention relates to flexible breathable polyurethane coatings and films and to the prepolymers from which they are formed. These prepolymers are isocyanate-capped poly (alkylene oxide) glycol polyurethanes with low viscosities and low freezing points. The difunctional nature of the random copolymers of ethylene oxide and prepylene oxide added to simple diols provide the low viscosity and low freezing points; high levels of ethylene oxide in the polyol provides the breathability.

REFERENCES:
patent: 4127516 (1978-11-01), Larsen et al.

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