Document Type and Number:
Japanese Patent JPS5618022
Kind Code:
B2
Abstract:
1453877 Vinyl chloride resin compositions NIPPON ZEON CO Ltd 6 June 1974 [7 June 1973] 25152/74 Heading C3P A composition suitable for use in moulding information carriers consists essentially of a uniformly kneaded mixture of (I) 100 parts by weight of a composite resin having a specific viscosity of 0À16-0À40 composed uniformly of (A) 90-40% by weight of a vinyl chloride resin which is a vinyl chloride homopolymer or a vinyl chloride copolymer containing not more than 40% by weight of a copolymerizable monomer and which has a specific viscosity of 0À16-0À28 and (B) 10-60% by weight of a methyl methacrylate resin which is either a methyl methacrylate homopolymer or a methyl methacrylate copolymer containing not more than 30% by weight of a copolymerizable monomer and which has a specific viscosity of 0À12-0À90 and (II) 1-10 parts by weight of moulding additives, the specific viscosities being measured on a 100 ml. nitrobenzene solution containing 0À4 gm. of a sample of a resin at 30‹ C., the composition having a melt viscosity of 3 x 103 to 3 x 104 poises at 160‹ C. at a shearing rate of 103 sec.-1 and a break elongation of at least 10% when stretched at 25‹ C. at a tensile speed of 10 mm./min. The composite resin can be obtained by mixing preformed vinyl chloride and methyl methacrylate resins; post-polymerizing the monomer(s) which form the vinyl chloride resin in the presence of a preformed methyl methacrylate resin; or post-polymerizing the monomers which form the methyl methacrylate resin in the presence of a vinyl chloride resin. Suitable additives (II) are a heat stabilizer, e.g. metal soaps, organic tin compounds, epoxy compounds and phosphorus acid compounds; a lubricant, e.g. higher fatty acid, fatty acid amide, higher alcohol or fatty acid ester; an antistatic agent such as organic amine, fatty acid ester, quaternary ammonium salt, phosphoric acid ester or polyhydric alcohol; or a pigment such as carbon black. The specified Examples describe compositions comprising a composite resin of polymethyl-methacrylate and either polyvinyl chloride or copolymer of vinyl chloride and vinyl acetate (8À5%) and a mixture of an organotin mercaptide stabilizer, an epoxy stabilizer, an organic quaternary ammonium salt antistatic agent, and carbon black as component (II).
Application Number:
JP6334173A
Publication Date:
April 25, 1981
Filing Date:
June 07, 1973
Export Citation:
International Classes:
C08F14/00; C08F259/00; C08F265/00; C08L27/00; C08L27/06; C08L33/00; C08L33/02; C08L33/04; C08L33/12; C08L51/00; C08L51/02; G11B3/70