Patent ID: 11945933
Assignee: SI GROUP, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A stabilized composition, comprising:
a) a polyurethane, or a polyurethane and a polyol; and
b) a stabilizing composition comprising:
i. a first phenolic antioxidant comprising two or more phenolic compounds having the structure of formula (I):, wherein R1 is a linear or branched alkyl group having from 12 to 20 carbon atoms; and

ii) one or more second phenolic antioxidants independently selected from the group consisting of:
a mono-hydroxybenzene selected from the group consisting of α-tocopherol; 4,4′-thiobis(2-t-butyl-5-methylphenol), 2,2′-thiobis(6-t-butyl-4-methylphenol), 2,2′-methylenebis(6-t-butyl-4-methylphenol), 4,4′-butylidenebis[2-t-butyl-5-methylphenol], 2,2′-methylenebis(6-nonyl-p-cresol) and phenol, 4-methyl-, reaction products with dicyclopentadiene and isobutylene;
a di-hydroxybenzene selected from the group consisting of 4-tert-butylcatechol, 2,5-di-tert-amyl-hydroquinone, benzene-1,2-diol, benzene-1,3-diol, and benzene-1,4-diol, and
a tri-hydroxybenzene selected from the group consisting of benzene-1,2,3-triol, propyl 3,4,5-trihydroxybenzoate; and benzene-1,2,4-triol,

wherein the stabilizing composition does not contain a benzofuranone-based booster component.