Synergistic stabilizer compositions for polyols and polyurethane

Details Synergistic stabilizer compositions for polyols and polyurethane Synergistic stabilizer compositions for polyols and polyurethane

1992-02-18

1992-09-01

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

25218226, 25218227, 252390, 252393, 252394, 252403, 252609, 521117, 521128, 521129, 521906, C08J 900

Patent

active

051439433

ABSTRACT:
Polyether polyols and polyurethane foams are stabilized by including therein a liquid stabilizer composition of (a) 2,6-di-tert-butyl-4-sec-butylphenol, (b) a reaction product of diisobutylene, styrene and diphenylamine and (c) phenothiazine or C.sub.9-26 -alkyl substituted phenothiazine and wherein the ratio of the phenol to the reaction product is about 1:5 to 5:1 and the ratio of the mixture of components (a) and (b) to the phenothiazine compound is about 5.0:0.1 to 4.0:1.0. The stabilizer composition may further contain trihydrocarbyl phosphite to stabilize the color of same.

REFERENCES:
patent: 2530769 (1950-11-01), Hollis
patent: 3214397 (1965-10-01), Cox
patent: 4010211 (1977-03-01), Preston et al.
patent: 4265783 (1981-05-01), Hinze
patent: 4275173 (1981-06-01), Hinze
patent: 4677154 (1987-06-01), Narayan et al.
patent: 4933374 (1990-06-01), Suhoza et al.
K. C. Frisch and J. H. Saunders, ed., Plastic Foams, Part 1, 118-125 (1972).
G. L. Statton and J. M. Gaul, Evaluation of Hindered Phenols for Minimization of Foam Discoloration Using the Microwave Scorch Test, 20 J. Cellular Plastics, 346-50 (1984).

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