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US 6,605,327 B1Granted
Vinyl acetate copolymers in hoses
AssigneeDana Corporation
InventorsMarty A. Ramey, Ron H. Moody
Life of this patent
Estimating the term…
Abstract
A multilayer automotive hose includes an innermost layer of elastomer material, and a separate outermost layer of elastomer material, each including between about 40% and about 80% vinylacetate by weight in a copolymer. The elastomer layers are formed by an extrusion process. The vinylacetate is copolymerized with polyethylene. Each of the elastomer layers has a fully saturated backbone. As a result, each of the innermost and outermost layers is a non-thermoplastic elastomer.
Claims16
A multilayer automotive hose, which comprises:
- an innermost layer of elastomer material, which comprises between about 40% and about 80% vinylacetate by weight in a copolymer;
- and
- a separate outermost layer of elastomer material, which comprises between about 40% and about 80% vinylacetate by weight in a copolymer.
A method of manufacturing a multilayer automotive hose, which comprises:
- forming an innermost layer of elastomer material which comprises between about 40% and about 80% vinylacetate by weight in a copolymer, by an extrusion process;
- and
- forming a separate outermost layer of elastomer material which comprises between about 40% and about 80% vinylacetate by weight in a copolymer, by an extrusion process.
Dependencies are inferred from the claim text.