Microgel-containing tread mixture for winter tires

Title:

Microgel-containing tread mixture for winter tires

Document Type and Number:

Japanese Patent JP6284491

Kind Code:

B2

Abstract:

Vulcanizable rubber mixture comprises: (I) 100 pts. wt. of an oil-free rubber matrix consisting of (a) 15-79 (preferably 20-70) pts. wt. of at least one solution styrene-butadiene rubber, (b) 20-75 (preferably 25-70) pts. wt. of at least one 1,4-cis-polybutadiene, (c) 1-37.5 (preferably 5-35) pts. wt. of natural rubber (oil-free) and/or at least one synthetically produced polyisoprene; (II) at least one polybutadiene-based microgel that contains hydroxyl groups; (III) at least one oxide filler that contains hydroxyl groups; and (IV) at least one polysulfide-containing alkoxysilane. Vulcanizable rubber mixture comprises: (I) 100 pts. wt. of an oil-free rubber matrix consisting of (a) 15-79 (preferably 20-70) pts. wt. of at least one solution styrene-butadiene rubber (L-SBR) (oil-free) with a glass transition temperature of -70[deg] C to -10[deg] C, (b) 20-75 (preferably 25-70) pts. wt. of at least one 1,4-cis-polybutadiene (oil-free) with a glass transition temperature of -95[deg] C to -115[deg] C, (c) 1-37.5 (preferably 5-35) pts. wt. of natural rubber (oil-free) and/or at least one synthetically produced polyisoprene with a glass transition temperature of -50[deg] C to -75[deg] C; (II) at least one polybutadiene-based microgel that contains hydroxyl groups; (III) at least one oxide filler that contains hydroxyl groups; (IV) at least one polysulfide-containing alkoxysilane; (V) at least one vulcanization agent; and (VI) optionally at least one rubber additive. Independent claims are included for: (1) producing vulcanizable rubber mixtures, comprising mixing the components (I)-(IV) in one-more steps with one another, preferably either by a three-stage mixing process with two mixing stages in an internal mixer, and a final mixing stage on a roller, by a two stage mixing process, in which the first mixing stage is carried out in the internal mixer and the second mixing step is carried out on the roller, or by the two stage mixing process, in which the two mixing stages are carried out in the internal mixer, where the mixture is added before the addition of the components in the three-stage mixing process in the roller and cooled at a temperature of less than 120 (preferably 110)[deg] C; and (2) producing vulcanizates, comprising subjecting the vulcanizable rubber mixtures to a crosslinking reaction, preferably at a temperature of 100-250 (preferably 130-180)[deg] C, under a pressure of 1-200 bar.

Inventors:

Werner Obrecht
Rotor steger

Application Number:

JP2014556094A

Publication Date:

February 28, 2018

Filing Date:

February 11, 2013

Export Citation:

Click for automatic bibliography generation Help