Patent · US Expired

Hydantoin derivatives and their use as polymer stabilizers

US4162246A · kind A · utility

3Cited by

5References

11Claims

0Family size

Assignee

Sankyo Holdings Co., Ltd. · JP

Inventors

Nobuo Soma · Miyoshi, JP
Syoji Morimura
Takao Yoshioka · Tokyo, JP
Tomoyuki Kurumada

Key dates

Filing date	Dec 13, 1977
Grant date	Jul 24, 1979
Priority date	—
Expiry date	Dec 13, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D519/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Hydantoin derivatives in which two or three piperidine spiro hydantoin residues are attached by means of substituted alkylene groups or polyoxyalkylene groups whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups or by means of substituted isocyanurate or glyceryl groups and, where they exist, acid addition salts thereof, are valuable as stabilizers for synthetic polymers.

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