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    • 54. 发明申请
    • INJECTION MOLDING METHOD FOR NEUTRAL AND ACIDIC-GROUP CONTAINING (METH)ACRYLATE COPOLYMERS
    • 注射过程FOR中性和酸性烷基的(甲基)丙烯酸共聚物
    • WO01043935A2
    • 2001-06-21
    • PCT/EP2000/012467
    • 2000-12-09
    • B65D1/00A61J3/07A61K9/20A61K9/48A61K47/30A61K47/32B29C45/00B29C45/63B29K33/04B29L22/00B29C
    • A61K9/2095A61J3/077A61K9/2027A61K9/4816B29C45/0001
    • The invention relates to a method for producing molded bodies by injection molding that comprises the following steps: A) melting a mixture from a) a (meth)acrylate copolymer that is composed of 40 to 100 % by weight of radically polymerized C1- to C4 alkyl esters of the acrylic or methacrylic acid and 0 to 60 % by weight of (meth)acrylate monomers with an anionic moiety in the alkyl group. Said (meth)acrylate copolymer contains b) 0.1 to 3 % by weight of a parting compound. Optionally, c) 0 to 50 % by weight of a desiccant, d) 0 to 30 % by weight of a softener, e) 0 to 100 % by weight of additives or adjuvants, f) 0 to 100 % by weight of a pharmaceutical agent, and g) 0 to 20 % by weight of another polymer or copolymer can be contained in the mixture. The quantities indicated of components b) to g) relate to the (meth)acrylate copolymer a) and the mixture has a content in low-boiling components with a steam pressure of at least 1.9 bar at 120 DEG C of more than 0.5 % by weight before the mixture is molten. The inventive method further comprises the steps B) degassing the mixture in the thermoplastic state at temperatures of at least 120 DEG C, thereby reducing the content in low-boiling components with a steam pressure of at least 1.9 bar at 120 DEG C to not less than 0.5 % by weight, and C) injecting the molten and degassed mixture into the mold cavity of an injection-molding tool, said mold cavity having a temperature that ranges at least 10 DEG C below the glass transition temperature of the (meth)acrylate copolymer. The molten mixture is then cooled and the molded body obtained is removed from the mold.
    • 本发明通过注射成型包括以下步骤涉及一种用于生产模制品:A)熔化的混合物:a)一种(甲基)丙烯酸酯,其是由40〜100重量%自由基聚合C1-至C4-烷基酯共聚物 到60重量具有在烷基阴离子基团,即)(甲基)丙烯酸酯单体的%丙烯酸或甲基丙烯酸和0的酯含有0.1〜3重量%b脱模剂,和任选的c)0至50 重量干燥器,从0 D)的重量%至30重量的增塑剂%,E)0至100重量的添加剂或助剂F%)0至100重量的活性药物成分的%,克)0至20 可以被包括重量在混合物中的另一种聚合物或共聚物,其中所述组分至g的量)是指b)在该(甲基)丙烯酸酯共聚物a)和熔融前的混合物的%具有低沸点成分与含量 至少为1.9巴的蒸气压在 超过0.5重量%120℃,b)中脱气在热塑性状态下的混合物在至少120℃,从而低沸点成分与至少1.9巴的蒸气压在120℃下的内容的温度 为至多0.5重量%降低,C)注入熔融和脱挥发分的混合物到注塑模具的模腔中,其中所述模腔具有至少为10℃以下的(甲基的玻璃化转变温度)丙烯酸酯共聚物的温度时,冷却 熔融混合物和从模具移除所得到的成型制品的。