公开(公告)号：US20080176995A1

公开(公告)日：2008-07-24

申请号：US12017869

申请日：2008-01-22

申请人： Makoto OOURA ,  Tadashi Amano ,  Minoru Shigemitsu ,  Shingo Niinobe

发明人： Makoto OOURA ,  Tadashi Amano ,  Minoru Shigemitsu ,  Shingo Niinobe

IPC分类号： C09K3/00 ,  C08L27/06

CPC分类号： C08F14/06 ,  C08L1/284 ,  C08L27/06 ,  C08F2/20 ,  C08L2666/26

摘要： Provided is a dispersion stabilizer for suspension polymerization that contains a hydroxypropylmethylcellulose with a degree of methoxy group substitution of 27 to 30% by mass and a degree of hydroxypropoxy group substitution of 5 to 12% by mass, in which the viscosity at 20° C. of a 2% by mass aqueous solution of the hydroxypropylmethylcellulose is within a range from 5 to 1,600 mPa·s, and in 2 ml of a 0.2% by mass solution of the hydroxypropylmethylcellulose, the number of undissolved fibers with a particle size within a range from 8 to 200 μm, as measured by a Coulter counter method, is not more than 1,000, and the number of undissolved fibers with a particle size of 50 μm or greater measured using the same method is not more than 20. By employing a method of producing a vinyl chloride-based polymer that uses this dispersion stabilizer, a vinyl chloride-based polymer with extremely low levels of fish eyes and defects derived from foreign objects can be produced.

摘要翻译： 提供一种悬浮聚合用分散稳定剂，其含有甲氧基取代度为27〜30质量％，羟基丙氧基取代度为5〜12质量％的羟丙基甲基纤维素，其中20℃下的粘度 的羟丙基甲基纤维素的2质量％水溶液在5〜1600mPa.s的范围内，在2ml的0.2质量％羟丙基甲基纤维素溶液中，粒径在一定范围内的未溶解纤维的数量 通过Coulter反方法测量的8至200μm的不超过1,000个，使用相同方法测量的粒径为50μm或更大的未溶解纤维的数量不超过20.通过采用方法 制造使用该分散稳定剂的基于氯乙烯的聚合物，可以制造具有极低水平鱼眼的氯乙烯类聚合物和由异物衍生的缺陷。

公开(公告)号：US20100087608A1

公开(公告)日：2010-04-08

申请号：US12555247

申请日：2009-09-08

申请人： Kiyoshi ENDO ,  Yoshikatsu TSUCHIYA ,  Makoto OOURA ,  Hideaki ISHIZU

发明人： Kiyoshi ENDO ,  Yoshikatsu TSUCHIYA ,  Makoto OOURA ,  Hideaki ISHIZU

IPC分类号： C08F4/42

CPC分类号： C08F4/20 ,  C08F4/68 ,  C08F14/06 ,  C08F2/02 ,  C08F2/06

摘要： A method that is capable of producing a vinyl chloride-based polymer having excellent thermal stability without sacrificing productivity is provided. The method includes polymerizing a vinyl chloride-based monomer in the presence of a vanadium compound (A) represented by formula: Vi(═O)jZk (wherein i is an integer of 2 to 5, j represents 0 or 1, Z represents a ligand such as is an organic ligand that can bond to the vanadium atom via a hetero atom, and a plurality of ligands Z may be bonded together to form a ring that also includes the vanadium atom as a member of the ring, and k is an integer from 1 to 5), and in the presence of at least one aluminum compound (B).

摘要翻译： 提供能够生产具有优异的热稳定性而不牺牲生产率的氯乙烯类聚合物的方法。 该方法包括在由式（Ⅵ））ZZ表示的钒化合物（A）存在下聚合氯乙烯基单体：其中i为2至5的整数，j表示0或1，Z表示 配体，例如可以通过杂原子键合到钒原子上的有机配体，并且多个配位体Z可以键合在一起形成还包括钒原子作为环的成员的环，k是 1至5的整数）和至少一种铝化合物（B）的存在下进行。