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US 5,238,991 AGranted
Vulcanizable rubber composition with improved durability
AssigneeThe Goodyear Tire & Rubber Company
InventorsFredrick L. Magnus, David A. Benko
Life of this patent
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Abstract
Vulcanizable rubber composition containing a polyfluoroethylene (PFE) and/or a polyfluoroethylene compatibilizer agent is added to a standard sidewall recipe. The PFE and/or PFE compatibilizers improve ozone resistance, improve flex fatigue properties and decrease the onset of vulcanization by increasing the rate of vulcanization. The new formula also represents a fast curing sidewall formulation.
Claims9
A vulcanizable rubber composition comprising:
- (a) 100 phr of a diene containing elastomer or mixture thereof;
- (b) a sulfur vulcanizing agent or mixture thereof;
- (c) about 1 to about 10 phr of a polyfluoroethylene, said polyfluoroethylene having a particle size not greater than about 6 microns;
- and
- (d) about 0.1 to about 5 phr of a polyfluoroethylene compatibilizer, said compatibilizer being a carbon compound or mixture thereof which is a liquid surfactant or dispersant and which is selected from the group consisting of
- (1 ) a non-ionic surfactant of fluoroaliphatic polymeric esters and
- (2) a water insoluble liquid consisting essentially of a polymeric fatty ester or mixture thereof and a paraffinic solvent;
- said compatibilizer improving compatibility between said elastomer or mixture thereof and said polyfluoroethylene;
- said composition being characterized by excellent ozone and oxygen resistance, flex fatigue resistance and durability.
6 more elements
Dependencies are inferred from the claim text.