Patent · US Expired

Phenylethylidene-substituted phenyl polyphosphites

US4463112A · kind A · utility

4Cited by

13References

19Claims

0Family size

Inventors

William E. Leistner · Long Beach, US
Motonobu Minagawa · Koshigaya, JP
Yutaka Nakahara · Kasukabe, JP
Kazumi Kitsukawa · Misato, JP

Key dates

Filing date	Feb 13, 1980
Grant date	Jul 31, 1984
Priority date	—
Expiry date	Feb 13, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/526
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Organic polyphosphites are disclosed having in the molecule at least two phosphite ester groups, at least one of which is linked through oxygen to a phenylethylidene-substituted phenyl group and to a residue of a polyhydroxy compound which is a pentaerythritol residue or a residue of a phenol or alcohol having two to three hydroxyl groups separated from one another by at least three carbon atoms. Polymer stabilizer compositions comprising an organic polyphosphite as disclosed and a known polymer stabilizer, as well as synthetic resin stabilized with such stabilizer compositions, are also disclosed.

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