The present invention provides a vinyl chloride-based resin composition which is highly excellent in weatherability, impact resistance and gloss is provided, which comprises: (A) 100 parts by weight of a vinyl chloride-based resin; (B) from 1 to 30 parts by weight of a graft copolymer which is obtained by graft-polymerizing; (C) from 0.1 to 5 parts by weight of a methyl methacrylate-based two stages polymer which is obtained by, in the presence of a polymer while a solution of 0.1 g of said polymer in 100 ml of chloroform showing a specific viscosity (.eta..sub.sp) of 0.7 or more at 30.degree. C., comprising from 0 to 50% by weight of a repeating unit derived from methyl methacrylate, while a solution of 0.1 g of said two stages polymer in 100 ml of chloroform showing a specific viscosity of 0.5 or more at 30.degree. C.; and (D) from 1 to 20 parts by weight of calcium carbonate.

La actual invención proporciona una composición cloruro-basada vinilo de la resina que sea altamente excelente en el weatherability, resistencia de impacto y se proporciona el lustre, que abarca: (a) 100 porciones en peso de un vinilo cloruro-basaron la resina; (b) a partir de la 1 a 30 porciones en peso de un copolímero del injerto que es obtenido injerto-polimeriza'ndose; (c) a partir de la 0.1 a 5 porciones en peso de un polímero methacrylate-basado metílico de dos etapas por el cual es obtenido, en la presencia de un polímero mientras que una solución de 0.1 g del polímero dicho en 100 ml de cloroformo que demuestran una viscosidad específica (eta..sub.sp) de 0.7 o más en 30.degree. C., abarcando a partir la 0 a el 50% en peso de una unidad de repetición derivada del methacrylate metílico, mientras que una solución de 0.1 g del polímero dicho de dos etapas en 100 ml de cloroformo que demuestran una viscosidad específica de 0.5 o más en 30.degree. C.; y (d) a partir de la 1 a 20 porciones en peso de el carbonato de calcio.

 
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