Method of producing color stable thermoplastic polymethanes and

Details Method of producing color stable thermoplastic polymethanes and Method of producing color stable thermoplastic polymethanes and

1977-08-26

1981-10-27

Cockeram, H. S.

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...

528 48, 260 4595L, C08G 1832, C08G 1842

Patent

active

042974720

ABSTRACT:
The instant invention is directed to a novel method for improving the color stability of thermoplastic polyurethanes and the polyurethanes produced thereby. The invention broadly consists of adding relatively small amounts of a specified hydroxyl group containing additive to the thermoplastic polyurethane reaction mixture. The additive may be added before, or during production of the thermoplastic polyurethane. In general the additive is defined as:

REFERENCES:
patent: 2753319 (1956-07-01), Brockway
patent: 3214411 (1965-10-01), Saunders et al.
patent: 3296212 (1967-01-01), Britain
patent: 3493634 (1970-02-01), Kolycheck
patent: 3888908 (1975-06-01), Cross et al.
patent: 3931113 (1976-01-01), Seeger et al.

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