Elastomeric polyurethane-polyurea polymer prepared from an organ

Details Elastomeric polyurethane-polyurea polymer prepared from an organ Elastomeric polyurethane-polyurea polymer prepared from an organ

1980-08-27

1981-10-20

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521167, 528 75, 528 76, 528 77, 528 78, 528 80, 528 85, C08G 1814

Patent

active

042962129

ABSTRACT:
Elastomeric polyurethane-polyurea polymers are disclosed that are derived from the reaction of organic polyisocyanates with A. primary hydroxyl polyols having a functionality of 2 to 4 and a molecular weight from 1500 to 12000, and B. extender mixtures comprised of 1. an aromatic diamine wherein at least one of the positions ortho to each amine group is substituted by a lower alkyl group, and 2. a lower molecular weight diol, provided that the aromatic diamine comprises from 5 to 45 percent by weight of the extender mixture and the balance comprises the diol.
The polymers find particular utility in the preparation of reaction injection molded parts, particularly, automotive parts because of their excellent flexural modulus, tensile, and tear properties.

REFERENCES:
patent: 2948691 (1960-08-01), Windemuth et al.
patent: 3817940 (1974-06-01), Blahak et al.
patent: 4048105 (1977-09-01), Salisbury
patent: 4133943 (1979-01-01), Blahak et al.

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