Vinylidene chloride copolymer composition
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsNobuyuki Hisazumi, Tsutomu Uehara
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Abstract
A vinylidene chloride copolymer composition is produced by copolymerizing 60 to 95 wt. % of vinylidene chloride and 40 to 5 wt. % of a comonomer in the presence of a rigid polymer which has a softening temperature of 50 to 180.degree. C. and a melt viscosity of 0.1 to 500 poise at 170.degree. C. and is soluble in vinylidene chloride monomer and is not substantially miscible to the vinylidene chloride copolymer, at a ratio of 0.01 to 5 wt. parts per 100 wt. parts of the monomer mixture.
Claims9
A vinylidene chloride copolymer composition which comprises 0.01 to 5 wt. parts of a rigid polymer solidified as fine particles in 100 wt. parts of a matrix of vinylidene chloride copolymer wherein said rigid polymer is solid at room temperature, has a softening temperature of 50.degree. to 180.degree. C. and a melt viscosity of 0.1 to 500 poise at 170.degree. C. and is soluble in vinylidene chloride monomer and is substantially immiscible with the vinylidene chloride copolymer;
- and wherein said copolymer composition is prepared by polymerizing 60 to 90 wt.% of vinylidene chloride and 40 to 5 wt.% of a comonomer in the presence of said rigid polymer.
Dependencies are inferred from the claim text.