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US 9,752,008 B2Granted
Esters of cyclohexane polycarboxylic acids as plasticizers in rubber compounds
AssigneeBridgestone Corporation
InventorsTerrence E. Hogan, William J. Corsaut
Life of this patent
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Abstract
It has been discovered that the use of a plasticizer, an ester of a cyclohexanepolycarboxylic acid, especially a 1,2-cyclohexanedicarboxylic acid ester, that is environmentally non-toxic, can replace environmentally unfriendly phthalate plasticizers, such as dioctyl phthalates used in vulcanizable rubber compositions, especially for tires, on a one to one weight basis (phr) without sacrificing beneficial rubber properties.
Claims12
A vulcanizable rubber composition comprising:
- (a) a vulcanizable elastomer;
- (b) a reinforcing filler comprising a selection from the group consisting of silica, carbon black, and mixtures thereof;
- (c) a plasticizer comprising a 1,2-cyclohexanedicarboxylic acid ester;
- and
- (d) a vulcanization agent.
2 more elements
A vulcanizable rubber composition comprising:
- (a) a vulcanizable elastomer selected from the group consisting of natural rubber, synthetic polyisoprene rubber, styrene/butadiene rubber (SBR), polybutadiene, butyl rubber, ethylene/propylene rubber, ethylene/propylene diene rubber (EPDM), acrylonitrile/butadiene rubber (NBR), and hydrogenated nitrile rubber;
- (b) a reinforcing filler comprising silica, carbon black, or mixtures thereof;
- (c) about 1 to about 40 phr of a 1,2-cyclohexanedicarboxylic acid ester, selected from the group consisting of 1,2-diisobutyl-cyclohexanedicarboxylic acid ester;
- 1,2-di-(2-ethylhexyl)-cyclohexanedicarboxylic acid ester;
- 1,2-diisononylcyclohexanedicarboxylic acid ester;
- 1,2-di-C9-cyclohexane-dicarboxylic acid ester;
- 1,2-diisopentylcyclohexanedicarboxylic acid;
- 1,2-diisoheptyl-cyclohexanedicarboxylic acid;
- 1,2-diisodecylcyclohexane-dicarboxylic acid;
- 1,2-di-C7-11-cyclohexanedicarboxylic acid;
- 1,2-di-C9-11-cyclohexanedicarboxylic acid;
- 1,2-di-C7-9-cyclohexanedicarboxylic acid;
- and mixtures thereof;
- and
- (d) a sulfur vulcanization agent.
12 more elements
Dependencies are inferred from the claim text.