Patent · US Expired

Stabilized polyolefin compositions

US7291669B2 · kind B2 · utility

4Cited by
16References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 14, 2005
Grant dateNov 6, 2007
Priority date—
Expiry dateMay 29, 2025

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08K5/13
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Polyolefin compositions comprising a particular hindered phenolic antioxidant selected from the group consisting of tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1,3,5-tris-(3,5-di -tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene and the calcium salt of the monoethyl ester of 3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid, an oligomeric sterically hindered amine light stabilizer, a hydroxylamine stabilizer or trialkylamine N-oxide stabilizer, and, optionally, an organic phosphorus stabilizer, are effectively stabilized against degradation upon melt processing, long term heat aging, and exposure to combustion products of natural gas.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.