Rubber composition for tire treads

Details Rubber composition for tire treads Rubber composition for tire treads

Filed on

1984-08-23

Date issued

1985-11-26

Examiner

Lieberman, Allan M.

Patent Class

Synthetic resins or natural rubbers -- part of the class 520 ser

SubClass

Synthetic resins

SubSubClass

Mixing of two or more solid polymers; mixing of solid...

Other Related Categories

525236, 525194, C08L 700, C08L 900, C08L 906

Type

Patent

Status

active

Patent number

045555478

Description

ABSTRACT:
A rubber composition for tire treads, comprising [I] 10 to 70% by weight of a polybutadiene rubber having bonded to a carbon atom of the rubber molecular chain at least 0.1 mole, per mole of the rubber molecular chain, of an atomic grouping represented by the following formula ##STR1## wherein X represents O or S, R.sub.1 and R.sub.2 are identical or different and each represents an amino group or an alkyl-substituted amino group, R.sub.3 and R.sub.4 are identical or different and each represents a substituent other than the above-mentioned, m, p and q each represent O or an integer of at least 1, n represents an integer of at least 1, m+p=0-5, and n+q=1-5,
and [II] 90 to 30% by weight of at least one rubber selected from the group consisting of styrene-butadiene copolymer rubber having a bound stryene content of not more than 50% by weight and polyisoprene rubber.

REFERENCES:
patent: 4224197 (1980-09-01), Ueda et al.
patent: 4323485 (1982-04-01), Ahagon et al.
patent: 4373069 (1983-02-01), Bond et al.
patent: 4485205 (1984-11-01), Fujimaki et al.
patent: 4510291 (1985-04-01), Kawakami
patent: 4515922 (1985-05-01), Sakibara et al.

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