Patent · US Active

Sulfur-modified chloroprene rubber composition and molded body

US9475895B2 · kind B2 · utility

2Cited by

6References

7Claims

0Family size

Assignee

DENKA COMPANY LIMITED · JP

Inventors

Takashi Sunada · Itoigawa, JP
Yasushi Abe · Hino, JP
Naoki Kobayashi · Tokyo, JP

Key dates

Filing date	Sep 10, 2013
Grant date	Oct 25, 2016
Priority date	—
Expiry date	Sep 10, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K3/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An object of the invention is to provide a sulfur-modified chloroprene rubber composition improved in heat resistance. A sulfur-modified chloroprene rubber composition, comprising a sulfur-modified chloroprene rubber containing sulfur chemically bound thereto and sulfur not chemically bound to the sulfur-modified chloroprene rubber, wherein: the ratio of the amount of sulfur chemically bound to the sulfur-modified chloroprene rubber to the total amount of sulfur in the sulfur-modified chloroprene rubber composition (amount of chemically bound sulfur [mass %]/total amount of sulfur [mass %]) is 0.1 to 0.45; and the sulfur-modified chloroprene rubber has, at the molecular terminal, at least one structure represented by the following General Formula (1) or (2): —S—C(═S)—O—R1 . . . (1) (in General Formula (1), R1 represents an alkyl group having 1 to 4 carbon atoms) or —S—R2 . . . (2) (in General Formula (2), R2 represents an alkyl group having 8 to 20 carbon atoms).

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