Cellular material

Details Cellular material Cellular material

1975-02-13

1977-08-30

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 285AS, 260 42, 260 4225, 260 4232, 260 4237, 260724, 260758, C08J 906, C08L 900

Patent

active

040453804

ABSTRACT:
A cellular material may be made by vulcanizing a mixture containing between 15% and 50% of an ebonite-forming rubber and sufficient vulcanizing agents to form an ebonite with the rubber, between 5% and 87% of a coal digested in pitch, tar or tar oil, between 10% and 40% of a particulate filler and a chemical blowing agent, whereby an ebonite structure is formed, so that, during the vulcanization, the chemical blowing agent decomposes or reacts to produce a gas, the viscosity of the composition during the production of the gas increasing whereby cells are retained in the composition. The digested coal has a penetration, converted to a Ring and Ball softening point of 85.degree. C, of between 10 and about 45. Cellular plastics material produced by this process may contain at least 25% by volume of closed cells.

REFERENCES:
patent: 2271498 (1942-01-01), Overstreet
patent: 2404171 (1946-07-01), Hamilton
patent: 2807596 (1957-09-01), Flickinger
patent: 3354105 (1967-11-01), Trieschock

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