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US 4,072,645 AGranted
Transparent pre-cure coating for rubbery polymers
AssigneeThe Goodyear Tire & Rubber Company
InventorRichard J. Cogley, Jr.
Life of this patent
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Abstract
Light-colored unvulcanized polymers such as those used in the white sidewall areas of pneumatic vehicle tires are coated with a carbon black-free, pre-cure paint comprised of a polymer containing hydrated amorphous silica and a zinc activation system in a solubilizable form. The paint may have an aqueous or non-aqueous base; i.e., vehicle.
Claims10
A pre-cure paint comprising:
- a. a rubbery diene polymer,
- b. hydrated amorphous silica,
- c. a zinc salt or zinc complex which is soluble in the rubbery diene polymer, and
- d. a paint vehicle.
1 more element
Dependencies are inferred from the claim text.