Binder for chemical agents
AssigneeThe Goodyear Tire & Rubber Company
InventorsMichael R. Ambler, Richard R. Lattime, Edward Wanca
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Abstract
Rubber chemicals, such as accelerators, are often sold in rodform binders. In order for such rods of a rubber chemical to maintain their structural integrity a polymeric binder is utilized. An improved binder for chemical agents is disclosed herein. This binder is a blend of a graft copolymer and a random copolymer.
Claims20
A bound rubber chemical composition comprised of (a) from 1 to 20 weight percent of a blend of (1) from 50 to 90 weight percent of a graft copolymer of from 55 to 90 weight percent of at least one diolefin monomer and of from 10 to 45 weight percent of at least one vinyl aromatic monomer wherein said graft copolymer has a backbone which is derived from at least one diolefin monomer with sidechains which are derived from at least one vinyl aromatic monomer and (2) from 10 to 50 weight percent of a random copolymer of from 70 to 96 weight percent of at least one vinyl aromatic monomer and from 4 to 30 weight percent of at least one diolefin monomer, and (b) from 80 to 99 weight percent of at least one particulate solid chemical agent.
A process for producing a bound chemical composition comprising:
- (1) coagulating a latex comprised of (a) from 50 to 90 weight percent based upon total polymers of a graft copolymer of from 55 to 90 weight percent of at least one diolefin monomer and of from 10 to 45 weight percent of at least one vinyl aromatic monomer wherein said graft copolymer has a backbone which is derived from at least one diolefin monomer with side chains which are derived from at least one vinyl aromatic monomer, (b) from 10 to 50 weight percent based upon the total polymers of a random copolymer of from 70 to 96 weight percent of at least one vinyl aromatic monomer and from 4 to 30 weight percent of at least one diolefin monomer, (c) water, and (d) a soap;
- in the presence of at least one particulate solid chemical agent to produce a coagulum with the chemical agent dispersed throughout;
- (2) dewatering the coagulum;
- (3) extruding the coagulum;
- and (4) drying the coagulum to form said bound chemical composition.
Dependencies are inferred from the claim text.