Synthetic polyisoprene rubber latex
AssigneeKuraray Co., Ltd.
InventorsKoji Hirai, Takayuki Okamura, Kiyoshi Fujii
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Abstract
A synthetic polyisoprene rubber latex produced by emulsifying a solution of polyisoprene rubber in an organic solvent with water and removing the solvent from the resulting oil-in-water emulsion is significantly improved with respect to mechanical stability, wet gel strength and dry film strength by utilizing, as a polyisoprene rubber, a modified polyisoprene rubber prepared by introducing from about 0.03 to 20 carboxyl groups per 100 recurring units of isoprene monomer present in the synthetic cis-1,4-polyisoprene rubber.
Claims27
A polyisoprene rubber latex derived from synthetic cis-1,4-polyisoprene rubber and comprised of a stable aqueous dispersion of a modified polyisoprene rubber comprising of a carboxylated polyisoprene rubber with from about 0.03 to 20 carboxy groups per 100 recurring units of isoprene monomer in said cis-1,4-polyisoprene rubber said stable aqueous dispersion of modified polyisoprene rubber being obtained from an oil-in-water emulsion comprised of between about 4% to 20% by weight organic solvent solution of said modified polyisoprene rubber, an emulsifying agent and water after removal of said organic solvent from said emulsion.
Dependencies are inferred from the claim text.