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Title:
RUBBER RELEASE AGENT
Document Type and Number:
Japanese Patent JPS553444
Kind Code:
A
Abstract:

PURPOSE: To obtain a release agent usable for tire outer surfaces, free from causing tire cracks after vulcanization, by incorporating a specific amount of graphite into a colloidal talc to reduce the amount of the talc to be used sharply and to eliminate the white staining of the vulcanizate.

CONSTITUTION: A release agent comprising (A) 100 parts by wt. of a colloidal talc of average particle size 0.1W1μ and (B) 0.28W18 parts by wt. of a lubricant graphite of average particle size 3W20μ. Preferably, 5W38 wt% of (A) and 0.1 W0.9 wt% of (B) are dispersed in water together with a binder, spreader, and surfactant.


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Inventors:
INO KIYOSHI
MIHASHI TERUNOBU
DOI TEI
NOMURA NORIO
Application Number:
JP7588278A
Publication Date:
January 11, 1980
Filing Date:
June 21, 1978
Export Citation:
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Assignee:
SUMITOMO RUBBER IND
NIPPON KOKUEN KOGYO KK
International Classes:
B29C33/00; B29B13/00; B29B15/00; B29C33/56; B29C33/60; B29C35/00; C09K3/00; C10M173/02; C10N20/06; C10N40/36; C10N50/02; C10N50/08; (IPC1-7): B29C1/04; B29H5/00; C09K3/00
Domestic Patent References:
JPS5083272A1975-07-05