The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1993
Filed:
Jun. 16, 1992
Applicant:
Inventor:
Richard A Suhoza, Norwalk, CT (US);
Assignee:
R. T. Vanderbilt Company, Inc., Norwalk, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08K / ;
U.S. Cl.
CPC ...
521107 ; 25218224 ; 25218227 ; 25218229 ; 252404 ; 252405 ; 521117 ; 521128 ; 524 83 ; 524258 ; 524291 ;
Abstract
Polyether polyols and polyurethane foams are stabilized by including therein a stabilizer composition of (a) tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane and (b) a reaction product of diphenylamine and diisobutylene wherein the molar ratio of the amine to the diisobutylene is 1:1.1 to 1:2.5. The stabilizer composition may contain a third synergistic component, phenothiazine or certain alkyl derivatives of phenothiazine. The stabilizer composition may further contain trihydrocarbyl phosphite to stabilize the color of same.