Method for recycling rubber and recycled rubber product

Details Method for recycling rubber and recycled rubber product Method for recycling rubber and recycled rubber product

1980-03-24

1981-01-13

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

264109, 264122, 264126, B29G 502

Patent

active

042448417

ABSTRACT:
A unique method for recycling rubber scrap to yield a final product of at least about one inch in thickness characterized by the absence of the use of alkalis, acids or organic solvents in the steps of the process. Finely ground dry rubber scrap is intimately mixed with a cure mix comprising about nine parts, by weight, dry sulfur and not more than about one part, by weight, zinc stearate. The resulting dry cure mix and dry rubber scrap mixture is placed into a mold and cured in a steam autoclave for about 1.25-4 hours at a temperature of about 325.degree. F., preferably, while maintaining a steam pressure within the autoclave of about 125 psi, preferably. Actual curing time is determined by the thickness of the final product. The final recycled rubber product is also claimed.

REFERENCES:
patent: 2977864 (1961-04-01), Pollar
patent: 3267187 (1966-08-01), Slosberg et al.
patent: 3344094 (1967-09-01), de Gaugue
patent: 4051080 (1977-09-01), Boccoli

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