ApplicationNo. 05/547061 filed on 02/13/1975
US Classes:521/101, Ingredient is bituminous or asphaltic material521/125, Organic metal compound contains a Group I or Group II metal atom521/128, Ingredient is a nitrogen containing compound521/132, Said ingredient is substantially nonvolatile material, e.g., hydrocarbon waxes, greases, etc.521/148, With conjugated diene reactant521/150, From reactant containing two or more ethylenic unsaturated groups521/155, Cellular product derived from a -N=C=X containing reactant wherein X is a chalcogen atom521/902, CELLULAR POLYMER CONTAINING AN ISOCYANURATE STRUCTURE521/99, Cellular product formation prior to or during solid polymer formation in the presence of a stated ingredient other than water524/571, Conjugated diene hydrocarbon monomer524/572, Adding nonreactive material to chemically modified solid polymer524/575.5, Natural rubber524/65, Coal derived additive, e.g., lignite, etc.524/66, Tar or pitch524/705Coal or bituminous material, extract or derivative thereof, oil shale, or fatty still residue thereof, as DNRM
ExaminersPrimary: Briggs, Sr., Wilbert J.
Attorney, Agent or Firm
Foreign Application Priority Data1972-04-06 UK
AbstractA 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° C, of between 10 and about 45. Cellular plastics material produced by this process may contain at least 25% by volume of closed cells.