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1.发明授权Miscible blends of vinyl acetate-ethylene copolymers and copolymers of acrylic acid or maleic anhydride 失效乙酸乙烯酯 - 乙烯共聚物和丙烯酸或马来酸酐的共混物的混溶混合物
公开(公告)号：US5319027A
公开(公告)日：1994-06-07
申请号：US921535
申请日：1992-07-29
IPC分类号： C08L25/04 , C08F2/44 , C08L25/08 , C08L31/04 , C08L33/00 , C08L33/02 , C08L33/04 , C08L33/08 , C09D131/04 , C09J131/04
摘要： Polymeric compositions are disclosed containing miscible blends of copolymers, one of which is a vinyl acetate/ethylene copolymer containing about 5 to 30 weight percent ethylene and the other is a copolymer of either acrylic acid or a maleic anhydride with a comonomer selected from styrene, ethyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate. Windows of miscibility for each of the copolymer blends have been defined and the blends can be advantageously formed by polymerizing the acrylic acid copolymer in the presence of an emulsion of the vinyl acetate/ethylene copolymer in such a way that the polymerization takes place in the suspended vinyl acetate/ethylene copolymer rather than in the aqueous phase.
摘要翻译： 公开了包含共混物的可混溶共混物的聚合物组合物，其中之一是含有约5-30重量％乙烯的乙酸乙烯酯/乙烯共聚物，另一个是丙烯酸或马来酸酐与共聚单体的共聚物，共聚单体选自苯乙烯，乙基 丙烯酸酯，丙烯酸正丁酯和丙烯酸2-乙基己酯。 已经定义了每种共聚物共混物的混溶性窗口，并且可以有利地通过在乙酸乙烯酯/乙烯共聚物的乳液存在下聚合丙烯酸共聚物来形成共混物，使得聚合在悬浮的 乙酸乙烯酯/乙烯共聚物，而不是在水相中。
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公开(公告)号：US5061298A
公开(公告)日：1991-10-29
申请号：US537171
申请日：1990-06-13
CPC分类号： B01D67/0093 , B01D71/64 , C01B13/0255 , C01B21/0444 , C08L79/08 , C01B2210/0046
摘要： The present invention is a class of semi-permeable polymeric membranes and processes for using such membranes to separate one or more components of a gas mixture. The membranes which are formed from a polymer blend of a first polyimide containing an aromatic diamine and a second polyimide containing an alkenylated diamine having an allyl or allylaryl group exhibit high gas perm-selectivities. The polyimide blends can be surface modified by treatment with an activating force such as high energy electromagnetic irradiation or with a free radical source to impart enhanced selectivity to the membrane without causing a large decrease in composite permeance. These membranes formed from polyimide blends are especially useful in effecting the separation of oxygen and nitrogen from air.
摘要翻译： 本发明是一类半透性聚合物膜和使用这种膜分离气体混合物的一种或多种组分的方法。 由包含芳族二胺的第一聚酰亚胺和含有具有烯丙基或烯丙基芳基的烯基化二胺的第二聚酰亚胺的聚合物共混物形成的膜显示出高的气体选择性。 聚酰亚胺共混物可以通过用诸如高能电磁照射的激活剂处理或用自由基源进行表面改性，以赋予膜增强的选择性，而不会导致复合渗透性的大幅度降低。 由聚酰亚胺共混物形成的这些膜特别适用于从空气中分离氧和氮。
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3.发明授权Poly[(vinyl alcohol)-CO-(vinyl amine)] copolymers as stabilizing protective colloids in aqueous emulsion polymerization 失效聚[（乙烯醇）-CO-（乙烯基胺）]共聚物作为水乳液聚合中的稳定保护胶体
公开(公告)号：US5326809A
公开(公告)日：1994-07-05
申请号：US981572
申请日：1992-11-25
CPC分类号： C08F2/28
摘要： A method for preparing aqueous polymer emulsions in the presence of a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer as a protective colloid and aqueous polymer emulsions containing a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer.
摘要翻译： 在聚[（乙烯醇） - 共 - （乙烯基胺）]共聚物作为保护胶体存在下制备含水聚合物乳液的方法和含有聚[（乙烯醇） - 共 - （乙烯基胺） ]共聚物。
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4.发明授权In-situ polymerized blends of vinyl acetate/ethylene copolymar and poly(vinyl chloride) 失效醋酸乙烯酯/乙烯共聚物和聚（氯乙烯）的现场聚合共混物
公开(公告)号：US5198501A
公开(公告)日：1993-03-30
申请号：US570071
申请日：1990-08-20
CPC分类号： C08L51/06 , C08F259/04
摘要： A poly(vinyl chloride) product is provided containing as a permanent plasticizer, a copolymer of vinyl acetate and ethylene which is copolymerized in the presence of porous particles of the PVC. The copolymerization is carried out in either suspension or emulsion and under conditions which provide a copolymer containing 60 to 85 wt % vinyl acetate in amounts from about 20 to 60 wt % of the vinyl acetate/ethylene copolymer in the final composition. A free flowing powder is formed which can be used for PVC compounding operations. If over 60 up to 80 wt % of the composition contains the copolymer, the product is a reinforced VAE dispersion.
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公开(公告)号：US4784707A
公开(公告)日：1988-11-15
申请号：US827990
申请日：1986-02-07
申请人： Karl Wefers , Larry T. Taylor , Richard H. Bott
发明人： Karl Wefers , Larry T. Taylor , Richard H. Bott
摘要： Electrical joint compounds for the protection of electrical connections are formed from a solution of polymer dissolved in solvent with or without conductive filler. Partially cured thermosetting polymers are preferred as they flow under service conditions to better seal the electrical joints. Thermosetting polymers which cure by an addition mechanism are preferred over those which cure by condensation, and polyimides are most preferred.
摘要翻译： 用于保护电连接的电接头化合物由溶解在具有或不具有导电填料的溶剂中的聚合物溶液形成。 部分固化的热固性聚合物是优选的，因为它们在使用条件下流动以更好地密封电接头。 通过加成机理固化的热固性聚合物优于通过缩合固化的热固性聚合物，聚酰亚胺是最优选的。
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6.发明授权Aqueous emulsion materials containing copolymerized vinyl amide monomers and hydrolysis products thereof 失效含有共聚乙烯基酰胺单体的水性乳液材料及其水解产物
公开(公告)号：US5591799A
公开(公告)日：1997-01-07
申请号：US398025
申请日：1995-03-03
IPC分类号： C08L39/02 , C08F8/12 , C08F18/02 , C08F26/00 , C08F218/02 , C08F218/08 , C08F218/10 , C08F220/10 , C08F220/12 , C08F226/02 , C08L39/00
CPC分类号： C08F8/12 , C08F2810/50
摘要： This invention pertains to aqueous emulsions containing water insoluble, vinyl polymer particles containing polymerized N-vinyl formamide (NVF) units converted to water insoluble vinyl acetate polymers containing cationic, amine functional units. These latex dispersions are prepared by the emulsion polymerization of an ethylenically unsaturated monomer and N-vinyl formamide. Preferably, vinyl acetate, optionally with other ethylenically unsaturated monomers, are used to form the copolymer. The copolymer then is selectively hydrolyzed via acid hydrolysis of the N-vinyl formamide group to form water insoluble polymer particles.
摘要翻译： 本发明涉及含有水不溶性乙烯基聚合物颗粒的含水乳液，该聚合物颗粒含有聚合的N-乙烯基甲酰胺（NVF）单元转化成含有阳离子胺官能单元的水不溶性乙酸乙烯酯聚合物。 这些胶乳分散体通过烯属不饱和单体和N-乙烯基甲酰胺的乳液聚合制备。 优选使用任选与其它烯属不饱和单体的乙酸乙烯酯形成共聚物。 然后通过N-乙烯基甲酰胺基团的酸水解将共聚物选择性水解，形成水不溶性聚合物颗粒。
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