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US 5,844,043 AGranted
Crosslinkable mixtures of recycled rubber granules and rubber
AssigneeHuels Aktiengesellschaft
InventorsJulius Peter, Peter Schmidt, Dieter Mahlke, Klaus zur Nedden
Life of this patent
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Abstract
Crosslinkable mixtures are made of recycled rubber granules, rubber and oil. The crosslinkable mixtures are made of recycled rubber granules mixed with rubber dissolved in oil. The crosslinkable mixtures can be press molded into molded bodies having good mechanical and elastic properties, since a virtually plastic flowing provides for optional bonding of the granule particles among each other during processing.
Claims12
A free-flowing granular crosslinkable rubber composition, consisting essentially of:
- 100 parts by weight of vulcanized rubber granules intimately mixed and coated with 3-35 parts by weight of a solution of unvulcanized polyoctenamer dissolved in oil capable of dissolving said unvulcanized polyoctenamer, wherein the ratio of oil to unvulcanized polyoctenamer is 95:5 parts by weight to 60:40 parts by weight, at a temperature below the decomposition temperature of the unvulcanized polyoctenamer, and an effective amount of a vulcanizing agent.
A free-flowing granular crosslinkable rubber composition, consisting essentially of:
- 100 parts by weight of vulcanized rubber granules mixed with an effective amount of sulfur and vulcanization accelerator, and 3-35 parts by weight of a solution of an unvulcanized polyoctenamer dissolved in a paraffinic oil, wherein said mixture contains 95:5 parts by weight of oil to 60:40 parts by weight of unvulcanized polyoctenamer wherein said oil is capable of dissolving the polyoctenamer and is thermally and chemically stable at temperatures of about 150.degree.-250.degree. C., and wherein said vulcanized rubber is intimately mixed and coated with said unvulcanized polyoctenamer dissolved in oil.
Dependencies are inferred from the claim text.