Rubber compositions expansible under vulcanization conditions
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHans J. Bucken, Helmut Horskorte
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Abstract
A rubber composition, expansible under vulcanization conditions consisting of at least one vulcanizable synthetic rubber, vulcanizing agents and a propellant gas donor under vulcanizing conditions consisting of (a) from 100 to 900 parts by weight, based on 100 parts by weight of said synthetic rubber, of natural, non-pretreated chalk, and (b) from 5 to 120 parts by weight, based on 100 parts by weight of said synthetic rubber, of at least one natural or synthetic fatty acid having from 12 to 22 carbon atoms.
Claims6
A rubber composition, expansible under vulcanization conditions consisting of at least one vulcanizable synthetic rubber selected from the group consisting of styrene/butadiene rubber, polybutadiene rubber, and mixtures thereof, vulcanizing agents and a propellant gas donor under vulcanizing conditions in the absence of azobutyric acid dinitrile and sodium hydrogen carbonate, consisting of a mixture of
- (a) from 100 to 900 parts by weight, based on 100 parts by weight of said synthetic rubber, of natural, non-pretreated chalk, and
- (b) from 5 to 120 parts by weight, based on 100 parts by weight of said synthetic rubber, of at least one natural fatty acid having from 14 to 18 carbon atoms and containing at least 60% of saturated acids, as the sole blowing agent.
Dependencies are inferred from the claim text.