Use of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid for stabi

Details Use of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid for stabi Use of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid for stabi

1989-12-14

1991-04-09

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

25218227, 252404, 568581, C08L 7508

Patent

active

050065998

ABSTRACT:
The present invention relates to a method for stabilizing a polyether polyol having a molecular weight of from about 300 to about 10,000 comprising adding 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid as an antioxidant stabilizer, optionally in combination with other antioxidants, to said polyether polyol. This invention further relates to polyols stabilized by the method of this invention and to stabilized polyurethanes prepared from such stabilized polyols.

REFERENCES:
patent: 3723489 (1973-03-01), Dexter et al.
patent: 3763093 (1973-10-01), Kletcka et al.
patent: 4021385 (1977-05-01), Austin et al.
patent: 4070304 (1978-01-01), Hinze
patent: 4371647 (1983-02-01), Minagawa et al.
patent: 4444676 (1984-04-01), Statton et al.

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