PROBLEM TO BE SOLVED: To provide a medical vinyl chloride resin composition capable of obtaining a medical joint pipe for connecting a medical tube which is composed of a vinyl chloride resin composition containing a cyclohexane dicarboxylate-based plasticizer, is easily inserted and hardly pulled out and has no problem in a dissolution test.SOLUTION: There is provided a medical vinyl chloride resin composition which comprises: 100 pts.mass of component (a) a vinyl chloride resin 1 to 20 pts.mass of component (b) a cyclohexane dicarboxylate-based plasticizer 0.5 to 30 pts.mass of one or more selected from the group consisting of component (c) a methyl methacrylate-alkyl acrylate copolymer, a methyl methacrylate-alkyl acrylate-styrene copolymer and a methyl methacrylate-alkyl acrylate-glycidyl (meth)acrylate copolymer. There is also provided the medical vinyl chloride resin composition which further comprises 0.1 to 15 pts.mass of component (d) a silane compound.【課題】シクロヘキサンジカルボキシレート系可塑剤を含む塩化ビニル樹脂組成物からなる、差し込み易く、抜け難く、かつ溶出性試験において問題のない医療用チューブを接続するための医療用ジョイント管を得ることのできる塩化ビニル樹脂組成物の提供。【解決手段】成分(a)塩化ビニル樹脂100質量部;成分(b)シクロヘキサンジカルボキシレート系可塑剤1~20質量部;成分(c)メタクリル酸メチル・アクリル酸アルキル共重合体、メタクリル酸メチル・アクリル酸アルキル・スチレン共重合体、メタクリル酸メチル・アクリル酸アルキル・(メタ)アクリル酸グリシジル共重合体からなる群から選ばれる1種以上0.5~30質量部;を含有する医療用塩化ビニル樹脂組成物。更に(d)シラン化合物を0.1~15質量部含有する医療用塩化ビニル樹脂組成物。【選択図】なし
