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Crosslinked natural rubber graft copolymer - by incorporating methyl methacrylate into crosslinked natural rubber latex and irradiating the mixt. with ionising radiation

机译：交联的天然橡胶接枝共聚物-通过将甲基丙烯酸甲酯掺入交联的天然橡胶胶乳中并照射混合物。电离辐射

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摘要

A polymer (I) is claimed, in which methyl methacrylate (MMA) is grafted onto a crosslinked natural rubber latex (II). (2) Process for prodn. of (I) comprises producing the latex (II), incorporating theMMA into (II) and exposing the mixt. to ionising radiation. (3) A compsn. is claimed, consisting mainly of an MMA graft copolymer of a crosslinked latex (I) and an MMA graft copolymer of an uncrosslinking natural rubber latex. (II) is produced by exposing a natural rubber latex to ionising radiation in the presence of n-butyl acrylate (n-BA). (II) is produced by mixing a 30-60% rubber latex with 5 phr n-BA and irradiating with 5-20 kGy ionising radiation, then 50 pts. wt. MMA (as an emulsion in 1-2% aq. ammonia) is incorporated to give a rubber concn. of 20-30% and the mixt. is stirred for 3-4 hrs. and exposed to 5 kGy radiation (gamma-rays, X-rays, electrons, etc.). USE/ADVANTAGE - The invention provides a modified natural rubber which can be used as a thermoplastic elastomer, and which does not pollute the working environment or the atmos..

机译：要求保护的聚合物（I），其中将甲基丙烯酸甲酯（MMA）接枝到交联的天然橡胶胶乳（II）上。（2）生产过程（I）的步骤包括生产胶乳（II），将MMA掺入（II）并暴露混合物。电离辐射。（3）compsn。要求保护的橡胶主要由交联胶乳（I）的MMA接枝共聚物和未交联天然橡胶胶乳的MMA接枝共聚物组成。（II）是通过在丙烯酸正丁酯（n-BA）的存在下将天然橡胶胶乳暴露于电离辐射而制得的。（II）是通过将30-60％的橡胶胶乳与5 phr n-BA混合并用5-20 kGy电离辐射辐照，然后照射50点来生产的。重量掺入MMA（在1-2％氨水溶液中的乳液），得到橡胶浓缩物。 20-30％和混合。搅拌3-4小时。并暴露于5 kGy辐射（伽马射线，X射线，电子等）。用途/优点-本发明提供了一种改性的天然橡胶，其可用作热塑性弹性体，并且不会污染工作环境或大气。

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公开/公告号DE4022629A1

专利类型
公开/公告日1991-01-24

原文格式PDF
申请/专利权人 JAPAN ATOMIC ENERGY RESEARCH INSTITUTE TOKIO/TOKYO JP;HIROSHIMA KASEI LTD. FUKUYAMA HIROSHIMA JP;
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申请/专利号DE19904022629
发明设计人 ISHIGAKI ISAO MAEBASHI GUNMA JP;MAKUUCHI KEIZO GUNMA JP;ONO SEIJI FUCHU HIROSHIMA JP;YOSHII FUMIO FUJIOKA GUNMA JP;
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申请日1990-07-17
分类号C08F253/00;C08C19/28;
国家 DE
入库时间 2022-08-22 05:49:10

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