Rubber-silica composite and method for producing same, and rubber composition and pneumatic tire
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United States of America Patent
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May 22, 2018
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app pub date -
May 15, 2014
filing date -
Jul 31, 2013
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Abstract
Acido-basic properties of a system containing a polymer fragment obtained by oxidative cleavage of a carbon-carbon double bond of a diene rubber polymer and a functional molecule having in a structure thereof an alkoxysilyl group and at least one functional group selected from the group consisting of an aldehyde group and a carbonyl group are changed such that the system becomes basic when acidic, and becomes acidic when basic, thereby combining the polymer fragment with the functional molecule to form a modified diene rubber polymer having an alkoxysilyl group incorporated therein. A silane monomer comprising tetraalkoxysilane and/or alkyl trialkoxysilane is added to the system containing the modified diene rubber polymer, followed by condensation polymerization, thereby forming silica.
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