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1. 发明授权

US5128410A Graft copolymers and blends thereof with polyolefins 失效
标题翻译：接枝共聚物及其与聚烯烃的共混物
公开(公告)号：US5128410A
公开(公告)日：1992-07-07
申请号：US536384
申请日：1990-06-11
申请人： Casmir S. Ilendra , Newman Bortnick , Roger K. Graham , William J. Work
发明人： Casmir S. Ilendra , Newman Bortnick , Roger K. Graham , William J. Work
IPC分类号： C08F255/00 , C08F255/02 , C08L23/02 , C08L23/10 , C08L25/04 , C08L27/04 , C08L51/06 , C08L67/00 , C08L77/00
CPC分类号： C08L23/10 , C08F255/00 , C08F255/02 , C08L23/02 , C08L51/06 , C08L2205/08 , C08L25/04 , C08L27/04 , C08L67/00 , C08L77/00
摘要： A novel graft copolymer capable of imparting to a polyolefin when blended therewith high tensile modulus and high sag resistance without increasing melt viscosity, and a method of making the same. The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto. The graft copolymer is formed by dissolving or swelling a non-polar polyolefin in an inert hydrocarbon solvent, heating to dissolve the polyolefin, and while stirring the mixture, adding a methacrylate monomer, together with an initiator to produce a constant, low concentration of radicals, to from a graft copolymer with a high molecular weight polymer chain covalently bonded or grafted to the polyolefin backbone. The graft copolymer can be separated from the solvent, isolated by volatilizing the solvent, for example in a devolatilizing extruder, and extruded into a desired shape such as a sheet, tube or the like. This graft copolymer can be blended with a polyolefin matrix. The blend exhibits improved physical properties in the melt, upon cooling, and in the solid state, and is useful in cast and oriented films, solid extruded rod and profile, foamed rod, profile and sheet, blown bottles and the like. The graft copolymer further improves compatibility in a wide range of polymer blends.
摘要翻译：一种新型接枝共聚物及其制备方法，能够赋予聚烯烃高粘合性和高抗流挂性。接枝共聚物是具有相对高的重均分子量的甲基丙烯酸酯聚合物接枝的聚烯烃。接枝共聚物通过将非极性聚烯烃溶解或溶胀在惰性烃溶剂中，加热以溶解聚烯烃，并在搅拌混合物的同时，与引发剂一起加入甲基丙烯酸酯单体以产生恒定的低浓度自由基来自具有共价键合或接枝到聚烯烃主链上的高分子量聚合物链的接枝共聚物。接枝共聚物可以从溶剂中分离，通过挥发溶剂分离，例如在脱挥发分挤出机中，并挤出成期望的形状如片，管等。该接枝共聚物可以与聚烯烃基质共混。该混合物在熔体中，在冷却和固体状态下表现出改善的物理性能，并且可用于铸造和取向膜，固体挤出棒和型材，发泡棒，型材和片材，吹塑瓶等中。接枝共聚物进一步提高了宽范围聚合物共混物的相容性。

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