公开(公告)号：US5235012A

公开(公告)日：1993-08-10

申请号：US871504

申请日：1992-04-21

申请人： Ichiro Kaneko ,  Tadashi Amano ,  Toshimichi Koga

发明人： Ichiro Kaneko ,  Tadashi Amano ,  Toshimichi Koga

IPC分类号： C08F2/18 ,  C08F2/20 ,  C08F14/00 ,  C08F14/06

CPC分类号： C08F14/06

摘要： An improved method for the suspension polymerization is proposed which gives a PVC resin product having an increased plasticizer absorptivity and greatly decreased content of fish eyes. The invention can be achieved by additionally adding a limited volume of water into the polymerization mixture under proceeding of the polymerization reaction within a specified period of 30 to 70% monomer conversion and at such a controlled rate as not to unduly decrease the pressure inside of the reactor. The improvements are particularly remarkable when the dispersing agent added to the polymerization mixture is a ternary combination of (A) a water-soluble partially saponified polyvinyl alcohol of a high degree of polymerization and a high degree of saponification, (B) a hydroxypropyl methyl cellulose having specified degrees of substitution with methoxy and hydroxypropoxy groups and specified viscosity characteristics and (C) a monomer-soluble partially saponified polyvinyl alcohol of a low degree of polymerization and a low degree of saponification, each in a specified amount.

摘要翻译： 提出了一种改进的悬浮聚合方法，其提供了具有增加的增塑剂吸收性和大大降低鱼眼含量的PVC树脂产品。 本发明可以通过在30至70％单体转化的指定时间内，在聚合反应进行的前提下，将有限体积的水加入到聚合混合物中，并且以这样的控制速率，不会过度降低 反应堆。 当加入到聚合混合物中的分散剂是（A）高聚合度的水溶性部分皂化聚乙烯醇和高皂化度的三元组合时，（B）羟丙基甲基纤维素 具有指定的甲氧基和羟丙氧基取代度和特定的粘度特性，和（C）低聚合度和低皂化度的单体可溶性部分皂化聚乙烯醇。

公开(公告)号：US5403899A

公开(公告)日：1995-04-04

申请号：US186899

申请日：1994-01-27

申请人： Tadashi Amano ,  Toshimichi Koga

发明人： Tadashi Amano ,  Toshimichi Koga

IPC分类号： C08F2/16 ,  C08F14/00 ,  C08F14/06 ,  C08J3/00

CPC分类号： C08F14/06

摘要： A method for preparing powder of a vinyl chloride polymer comprises the steps of polymerizing vinyl chloride monomer or a vinyl monomer mixture mainly comprising vinyl chloride monomer in an aqueous medium and adding, to the polymerization system, a fluorine atom-containing nonionic surfactant in an amount ranging from 0.0001 to 0.5 part by weight per 100 parts by weight of the vinyl chloride monomer or the vinyl monomer mixture mainly comprising vinyl chloride monomer after the rate of polymerization reaches at least 70% or fine powder of at least one inorganic substance having a particle size ranging from 0.001 to 50 .mu.m in an amount ranging from 0.001 to 1.0 part by weight per 100 parts by weight of the vinyl chloride monomer or the vinyl monomer mixture mainly comprising vinyl chloride monomer after the rate of polymerization reaches at least 70%. The method for preparing powder of a vinyl chloride polymer makes it possible to form powder of a vinyl chloride polymer which is not electrically charged during, for instance, the storage and transport thereof. The resulting polymer powder hardly causes reduction of the bulk density and flow properties.

摘要翻译： 制备氯乙烯聚合物粉末的方法包括以下步骤：在水性介质中聚合氯乙烯单体或主要包含氯乙烯单体的乙烯基单体混合物，并向聚合体系中加入一定量的含氟原子的非离子表面活性剂 在100重量份氯乙烯单体或主要包含氯乙烯单体的乙烯基单体混合物的聚合度达到至少70％之后，至少一种具有颗粒的无机物质的细粉末为0.0001至0.5重量份 尺寸范围为0.001至50μm，其量为0.001至1.0重量份/ 100重量份的氯乙烯单体或主要包含氯乙烯单体的乙烯基单体混合物，其聚合度达到至少70％之后。 制备氯乙烯聚合物粉末的方法使得可以形成在其例如储存和运输期间不带电的氯乙烯聚合物的粉末。 所得到的聚合物粉末几乎不会降低堆积密度和流动性。

公开(公告)号：US5132382A

公开(公告)日：1992-07-21

申请号：US651761

申请日：1991-02-07

申请人： Genji Noguki ,  Toshimichi Koga ,  Tadashi Amano

发明人： Genji Noguki ,  Toshimichi Koga ,  Tadashi Amano

IPC分类号： C08L27/06 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F14/00 ,  C08F14/06 ,  C08K5/103

CPC分类号： C08F14/06 ,  C08K5/103

摘要： An improvement is proposed for decreasing triboelectric static charging of a polyvinyl chloride resin powder so as to improve the flowability of the powder and prevent a decrease in the bulk density of the powder due to static electricity. The improvement comprises, in the polymerization process of vinyl chloride monomer in an aqueous medium, adding, to the aqueous polymerization mixture, a specified amount of an aqueous dispersion containing a salt of a long-chain carboxylic acid with a divalent metal and an ester of sorbitan with a long-chain carboxylic acid in a specified weight proportion and in a specified total concentration at a moment when conversion of the monomer to polymer is at least 70%.

公开(公告)号：US5342906A

公开(公告)日：1994-08-30

申请号：US60596

申请日：1993-05-11

申请人： Tadashi Amano ,  Toshimichi Koga

发明人： Tadashi Amano ,  Toshimichi Koga

IPC分类号： C08F2/20 ,  C08F14/06 ,  C08F2/18

CPC分类号： C08F14/06

摘要： An improved method is proposed for the suspension polymerization of vinyl chloride monomer in an aqueous medium, by which the polyvinyl chloride resin obtained may have an increased bulk density without causing any disadvantages. The improvement can be obtained by controlling the power on the stirrer for the agitation of the polymerization mixture in such a manner that the power at the moment of the start of the polymerization reaction is 100 to 200 kgf.m/s per 1000 kg of the polymerization mixture and the power is subsequently decreased either continuously or step-wise according to a specified schedule down to 60 to 90% of the value at the start of the polymerization reaction at the moment when conversion of the monomer to polymer is 30% along with starting of the operation of the reflux condenser at a specified moment in relation to the stirrer power and the monomer conversion.

摘要翻译： 提出了一种用于氯乙烯单体在水性介质中的悬浮聚合的改进方法，通过该方法获得的聚氯乙烯树脂可以具有增加的堆积密度而不引起任何缺点。 可以通过控制搅拌器上的搅拌聚合混合物的功率来获得改进，使得聚合反应开始时的功率为每1000kg的聚合反应时的功率为100-200kgf.m / s 聚合反应混合物随后按照规定的时间连续或逐步降低功率，直到聚合反应开始时的单体与聚合物的转化率为30％时的60-90％ 相对于搅拌器功率和单体转化在指定时刻开始回流冷凝器的操作。

公开(公告)号：US5614593A

公开(公告)日：1997-03-25

申请号：US556425

申请日：1995-11-09

申请人： Toshimichi Koga ,  Minoru Shigemitsu ,  Osamu Matsumoto ,  Makoto Suzuki

发明人： Toshimichi Koga ,  Minoru Shigemitsu ,  Osamu Matsumoto ,  Makoto Suzuki

IPC分类号： C08K5/10 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F14/06 ,  C08F214/06 ,  C08L27/06

CPC分类号： C08F214/06 ,  C08F14/06

摘要： In preparing a matte vinyl chloride polymer by suspension polymerizing a monomeric charge comprising monomeric vinyl chloride in an aqueous medium, polymerization is started in the presence of 0.05-0.25 part by weight of diallyl phthalate per 100 parts by weight of the monomeric charge, and polymerization is continued while adding 0.01-0.15 part by weight of 1,6-hexanediol di(meth)acrylate per 100 parts by weight of the monomeric charge when the rate of polymerization is in the range of 20-60%. There is produced a matte vinyl chloride-diallyl phthalate copolymer having a tetrahydrofuran-insoluble gel content of 0.5-2.5% by weight in a reproducible manner. A composition prepared by blending the copolymer with a plasticizer has minimized fish-eyes and improved matting effect.

摘要翻译： 在通过将包含单体氯乙烯的单体电荷在水性介质中悬浮聚合制备无光氯乙烯聚合物时，每100重量份单体电荷在0.05-0.25重量份邻苯二甲酸二烯丙酯存在下开始聚合，并且聚合 继续加入0.01-0.15重量份的1,6-己二醇二（甲基）丙烯酸酯/ 100重量份的单体电荷，当聚合速率在20-60％的范围内时。 制备了可再现的方式，其四氢呋喃不溶性凝胶含量为0.5-2.5重量％的无光泽氯乙烯 - 二烯丙基邻苯二甲酸酯共聚物。 通过将共聚物与增塑剂共混制备的组合物使鱼眼减少并且改善了消光效果。

公开(公告)号：US5194536A

公开(公告)日：1993-03-16

申请号：US739431

申请日：1991-08-02

申请人： Makoto Fujiwara ,  Toshimichi Koga ,  Toshikatsu Yamamuro

发明人： Makoto Fujiwara ,  Toshimichi Koga ,  Toshikatsu Yamamuro

IPC分类号： C08F14/06 ,  C08F2/20 ,  C08F2/38 ,  C08F14/00 ,  C08F214/06

CPC分类号： C08F214/06

摘要： A process of preparing a lower vinyl chloride polymer which comprises suspension polymerization of a vinyl chloride monomer of a mixture of unsaturated monomers consisting essentially of vinyl chloride, in an aqueous solvent, in the presence of a straight chain alkyl vinyl compound having an epoxy end terminal group represented by the formula I: ##STR1## wherein n is an integer of 2-20.

摘要翻译： 一种制备低级氯乙烯聚合物的方法，该方法包括在具有环氧端基的直链烷基乙烯基化合物的存在下，在水性溶剂中将基本上由氯乙烯组成的不饱和单体的混合物的氯乙烯单体悬浮聚合 由式I表示的基团：其中n是2-20的整数。