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1. 发明授权

US4798869A Process for the production of thermoplastic compositions and compositions produced thereby 失效
公开(公告)号：US4798869A
公开(公告)日：1989-01-17
申请号：US927985
申请日：1986-11-07
申请人： Harald Sturm , Rolf-Walter Terwonne , Dieter Thunig
发明人： Harald Sturm , Rolf-Walter Terwonne , Dieter Thunig
IPC分类号： C02F11/00 , C02F11/04 , C02F11/14 , C02F103/00 , C08F2/22 , C08F285/00 , C08F265/04 , C08F267/06
CPC分类号： C08F285/00 , Y10S525/902
摘要： A process for the production of a thermoplastic composition for molded parts having improved impact resistance, transparency, surface gloss, and weatherability, and formed of a hard inner core of crosslinked polystyrene, a rubber-elastic intermediate layer of crosslinked polyacrylic ester, and an outer layer of polyvinyl chloride, wherein the inner core thereof is produced by the steps of:(a) forming a mixture, before or after addition of an initiator, under polymerization conditions in the presence of an emulsifier, of 0.01-5.0% by weight of an acrylic acid or methacrylic acid aclkyl ester with a crosslinking component, and thereafter(b) adding to the mixture, 20-70% by weight of a mixture of an aromatic vinyl monomer with a crosslinking component and, simultaneously therewith in a separate stream, a solution of an organic complexing agent and of an emulsifier in water, and optionally a solution of a catalyst, and emulsion polymerizing the resultant mixture;wherein the intermediate layer thereof is produced by adding, to the inner core produced in step (b),(c) 79.99-25% by weight of a mixture of an acrylic acid alkyl ester with a crosslinking component and simultaneouly therewith an aqueous emulsifier solution, under emulsion polymerization conditions; andwherein the outer layer thereof is formed on the thus-produced core/shell polymer by adding, to 50 to 2 parts by weight thereof,(d) 50 to 98 parts by weight of vinyl chloride or a monomer mixture containing predominantly vinyl chloride, with agitation, and in the presence of an initiator, the agitating temperature and period selected so that the conversion, based on the monomer mixture or, respectively, the vinyl chloride, is at most 10% by weight, and thereafter continuing the polymerization by heating to the polymerization temperature, to a vinyl chloride conversion of 65-95%.

2. 发明授权

US4719265A Process for the production of a pourable polyvinyl chloride with high proportions of acrylate elastomers 失效
标题翻译：用于生产具有高比例丙烯酸酯弹性体的可倾倒聚氯乙烯的方法
公开(公告)号：US4719265A
公开(公告)日：1988-01-12
申请号：US844440
申请日：1986-03-26
申请人： Dieter Thunig , Rolf-Walter Terwonne
发明人： Dieter Thunig , Rolf-Walter Terwonne
IPC分类号： C08F265/00 , C08F2/18 , C08F2/20 , C08F2/22 , C08F2/26 , C08F265/04 , C08L51/00 , C08L27/06 , C08L33/08 , C08L51/04
CPC分类号： C08F265/04 , Y10S526/91 , Y10S526/911
摘要： A pourable polyvinyl chloride having an acrylate content of at least 30 percent by weight, is formed through a process wherein the emulsion polymerization of an acrylic acid ester forming soft polymers is conducted together with a diene crosslinking agent(a) in the presence of a fatty acid soap, or(b) by the batchwise or continuous addition of the monomer, pre-emulsified with an aqueous alkali lauryl sulfate solution, during polymerization, and by the addition of a fatty acid soap after polymerization, and the vinyl chloride polymerization is performed in the presence of a methylcellulose ether as the suspension agent; wherein, after addition of the suspension agent, a Ca(OH).sub.2 suspension is added, the polymerization charge is neutralized by addition of an acid, and then an organic peroxide is added as the initiator in a dissolved or suspended form. The polymerization can also take place without acid addition, by utilizing azo-type catalysts. The suspension polymerization is not disturbed by wall cakings, and non-tacky, pourable polymers are obtained exhibiting a narrow particle size distribution.
摘要翻译：丙烯酸酯含量为至少30重量％的可浇注聚氯乙烯通过以下方法形成，其中形成丙烯酸酯的软质聚合物的乳液聚合与二烯交联剂（a）在脂肪存在下一起进行酸性皂，或（b）通过间歇或连续添加单体，在聚合期间用碱性月桂基硫酸钠水溶液预乳化，并且在聚合后加入脂肪酸皂，并进行氯乙烯聚合在甲基纤维素醚作为悬浮剂的存在下; 其中，在添加悬浮剂之后，加入Ca（OH）2悬浮液，通过加入酸中和聚合反应，然后以溶解或悬浮的形式加入有机过氧化物作为引发剂。通过利用偶氮型催化剂也可以在无酸加成的情况下进行聚合。悬浮聚合不会受到墙壁刺蚀的干扰，并且获得的表现出窄的粒度分布的非粘性的可倾倒的聚合物。

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