| abstract |
A vinyl chloride polymer having an excellent workability, lubricating property and gelling property, comprises (1)80 - 99.95 weight % of a polymeric ingredient (I) consisting of polyvinyl chloride and/or a copoiymer of 80 weight %or more of vinyl chloride with 20 weight % or less of another comonomer and (2)0.05-20 weight %of a polymeric ingredient (II) consisting of at least one polymerization product prepared by first polymerizing, in the presence of a polymeric component (a) consisting of polymethyl methacrylate and/or a copolymer of 50 weight % or less of another comonomer, 40 to 70 parts by weight of a first monomeric component (b) consisting of an alkyl acrylate (C<sub>1-18</sub>) and/or benzyl acrylate or a mixture of 30 weight % or more of an alkyl acrylate (C<sub>1-18</sub>) and/or benzyl acrylate with 70 weight % or less of an alkyl methacrylate (C<sub>1-18</sub>) under such a polymerization condition that when the monomeric component (b) alone is polymerized, the resultant product exhibits a reduced viscosity of 1 or less in a concentration of 0.1 g<sub>/</sub>100 ml of chloroform at 25°C, and, then, by second polymerizing, in the presence of the first polymerization product, 5 to 40 parts by weight of a second monomeric component (c) consisting of methyl methacrylate or a mixture of 50 weight % or more of methyl methacrylate and 50 weight %or less of another comonomer, the sum of the components (a), (b), and (c) being 100 parts by weight. |