公开(公告)号：US20170174971A1

公开(公告)日：2017-06-22

申请号：US15300649

申请日：2015-03-23

Applicant: KURARAY CO., LTD.

Inventor： Yosuke KUMAKI ,  Yasutomo SAITO

IPC: C09K8/035 ,  C04B40/00 ,  C08F216/06 ,  C09K8/467 ,  C04B16/04

CPC classification number: C09K8/035 ,  C04B16/04 ,  C04B28/02 ,  C04B40/0042 ,  C04B2103/0057 ,  C04B2103/46 ,  C04B2111/70 ,  C04B2201/10 ,  C08F216/06 ,  C09K8/467 ,  C09K8/487 ,  C09K8/5083 ,  C04B24/02 ,  C04B24/2623

Abstract: Provided by the present invention is an additive for a slurry being capable of inhibiting viscosity elevation and dehydration at high temperatures at low cost, through use for a slurry for civil engineering and construction (for example, a drilling mud and a drilling cement slurry for use in well drilling. etc.), and the like. A powdery additive for a slurry, the powdery additive containing a vinyl alcohol polymer, which has: a solubility of 25% or less when immersed in hot water at 60° C. for 3 hours; a degree of saponification of at least 99.5 mol %; an average degree of polymerization of at least 1,500 and 4,500 or less; and the amount of 1,2-glycol linkage of 1.8 mol % or less, the powdery additive being capable of passing through a sieve having a nominal mesh opening size of 1.00 mm.

公开(公告)号：US20170029540A1

公开(公告)日：2017-02-02

申请号：US15302281

申请日：2015-04-08

Applicant: KURARAY CO., LTD. ,  KURARAY EUROPE GMBH

Inventor： Tadahito FUKUHARA ,  Yosuke KUMAKI ,  Samuel MICHEL ,  Dirk HARTMANN

IPC: C08F114/06

CPC classification number: C08F114/06 ,  C08F2/18 ,  C08F2/20 ,  C08F14/06 ,  C08F2400/00

Abstract: A dispersion stabilizer in the present invention contains an aqueous emulsion (a) obtained by dispersing a polymer (A) having an ethylenically unsaturated monomer unit in an aqueous medium, a PVA (B) having a degree of saponification of 65 mol % or more and less than 82 mol % and a viscosity-average degree of polymerization of 250 or more and less than 1500, and a PVA (C) having a degree of saponification of 82 mol % or more and less than 98 mol % and a viscosity-average degree of polymerization of 1500 or more and less than 4000. The dispersion stabilizer contains: 7 to 51 mass % of the polymer (A); 40 to 84 mass % of the PVA (B); and 9 to 53 mass % of the PVA (C), with respect to a total amount of the polymer (A), the PVA (B), and the PVA (C). A vinyl resin satisfying required performance can be obtained using the dispersion stabilizer.

Abstract translation: 本发明的分散稳定剂含有通过将具有烯键式不饱和单体单元的聚合物（A）分散在水性介质中而得到的水性乳液（a），皂化度为65摩尔％以上的PVA（B） 低于82摩尔％，粘均聚合度为250以上且小于1500的皂化度为82摩尔％以上且小于98摩尔％的PVA（C），粘度平均值 聚合度为1500以上且小于4000.分散稳定剂含有：7〜51质量％的聚合物（A）; 40〜84质量％的PVA（B）; 相对于聚合物（A），PVA（B）和PVA（C）的总量，为9〜53质量％的PVA（C）。 使用分散稳定剂可以得到满足所需性能的乙烯基树脂。

公开(公告)号：US20160194412A1

公开(公告)日：2016-07-07

申请号：US14910595

申请日：2014-08-06

Applicant: KURARAY CO., LTD.

Inventor： Tadahito FUKUHARA ,  Yosuke KUMAKI

IPC: C08F2/20 ,  C08F114/06 ,  C08L29/04

CPC classification number: C08F2/20 ,  B01F17/0028 ,  C08F2/30 ,  C08F8/12 ,  C08F18/04 ,  C08F114/06 ,  C08L29/04 ,  C08L2201/54

Abstract: The present invention provides an easy-to-handle dispersion stabilizer for suspension polymerization that meets the following requirements: even if the amount of the dispersion stabilizer for suspension polymerization used for suspension polymerization of a vinyl compound is small, the resulting vinyl resin has high plasticizer absorptivity and is easy to work with; it is easy to remove residual monomer components from the resulting vinyl resin; and the resulting vinyl resin contains fewer coarse particles. The present invention relates to a dispersion stabilizer for suspension polymerization in the form of an aqueous liquid. This dispersion stabilizer contains, at a concentration of 20 mass % or more and 50 mass % or less, a PVA having a degree of saponification of 35 mol % or more and 65 mol % or less, a viscosity average degree of polymerization of 100 or more and 480 or less, a terminal aliphatic hydrocarbon group having 6 to 12 carbon atoms, and a block character of residual ester groups of 0.5 or more. In this dispersion stabilizer, the viscosity average degree of polymerization (P) of the PVA and the degree of modification (S) of the aliphatic hydrocarbon group satisfies 50≦S×P/1.880≦100.

Abstract translation: 本发明提供一种易于处理的用于悬浮聚合的分散稳定剂，其满足以下要求：即使用于乙烯基化合物的悬浮聚合的悬浮聚合用分散稳定剂的量少，所得乙烯基树脂具有高增塑剂 吸收性好，易于使用; 从所得乙烯基树脂中容易除去残留的单体组分; 所得到的乙烯基树脂含有较少的粗颗粒。 本发明涉及一种水性液体形式的悬浮聚合分散稳定剂。 该分散稳定剂含有皂化度为35摩尔％以上且65摩尔％以下的PVA，其粘度平均聚合度为100以上，聚合度为20质量％以下且50质量％以下 更多且480以下的碳原子数为6〜12的末端脂肪族烃基，残基酯基的嵌段特征为0.5以上。 在该分散稳定剂中，PVA的粘均聚合度（P）和脂肪族烃基的改性度（S）满足50＆lt; nlE; S×P / 1.880＆nlE; 100。

公开(公告)号：US20150329713A1

公开(公告)日：2015-11-19

申请号：US14653065

申请日：2013-12-26

Applicant: KURARAY CO., LTD.

Inventor： Tadahito FUKUHARA ,  Yosuke KUMAKI

IPC: C08L29/04 ,  C08J3/00 ,  C08F116/06

CPC classification number: C08L29/04 ,  C08F2/20 ,  C08F116/06 ,  C08F216/06 ,  C08J3/00 ,  C08J2327/06 ,  C08L2205/025 ,  C08L2205/03 ,  C08L27/06

Abstract: There is provided a dispersion stabilizer for suspension polymerization comprising a vinyl alcohol polymer (A), wherein the vinyl alcohol polymer (A) has a terminal anionic group and has a saponification degree of 30 to 60 mol %, a viscosity average polymerization degree of 650 or less, and a proportion of polymer molecules having a molecular weight of 8000 or less as determined by gel permeation chromatography is 9.5% by mass or less. When a vinyl compound is suspension-polymerized using the dispersion stabilizer for suspension polymerization, its higher polymerization stability allows for providing particles having a uniform size with a less amount of coarse particles, even under the conditions favorable for unstable polymerization.

Abstract translation: 提供了包含乙烯醇聚合物（A）的悬浮聚合分散稳定剂，其中乙烯醇聚合物（A）具有末端阴离子基团，皂化度为30〜60摩尔％，粘均聚合度为650 通过凝胶渗透色谱法测定的分子量为8000以下的聚合物分子的比例为9.5质量％以下。 当使用悬浮聚合用分散稳定剂进行乙烯基化合物的悬浮聚合时，即使在有利于不稳定聚合的条件下，其较高的聚合稳定性也能够提供具有较少量粗颗粒的具有均匀尺寸的颗粒。