| abstract |
PURPOSE: The titled resin composition low in compression set, excellent in processability and not detrimental to flatness of the surface after the molding process, comprising a vinyl chloride resin having a gel portion, a rubber substance having low solubility in methyl ethyl ketone, and a plasticizer. n CONSTITUTION: To 100pts.wt. vinyl chloride resin comprising 4W85wt% tetrahydrofuran-insoluble gel portion and the balance of a tetrahydrofuran-soluble potion are added 5W120pts.wt. rubber substance having a solubility in methyl ethyl ketone of below 90wt% (at 25°C), and a necessary amount of a plasticizer. As the rubber substances, there are used, for example, one whose solubility in methyl ethyl ketone is reduced to below 90wt% by forming a crosslinked structure by adding a polyfunctional monomer such as divinylbenzene to the polymerization system during the production, and one whose solubility in methyl ethyl ketone is reduced to below 90wt% by crosslinking by a method, for example, comprising treating the rubber polymer, after completion of polymerization, with an organic peroxide or the like. n COPYRIGHT: (C)1984,JPO&Japio |