公开(公告)号：US20160229936A1

公开(公告)日：2016-08-11

申请号：US15021872

申请日：2014-09-11

Applicant: KURARAY CO., LTD.

Inventor： Yosuke KUMAKI ,  Yasutomo SAITO

IPC: C08F216/06 ,  C09K8/035 ,  C09K8/44 ,  C04B24/26

CPC classification number: C08F216/06 ,  C04B24/16 ,  C04B24/2623 ,  C04B28/02 ,  C04B2103/0055 ,  C04B2103/0062 ,  C04B2103/46 ,  C08F8/00 ,  C09K8/035 ,  C09K8/44 ,  C09K8/467 ,  C04B24/281

Abstract: Provided by the present invention is a vinyl alcohol polymer crosslinked by a structure represented by the following formula (1) and/or a disulfide structure, in which the vinyl alcohol polymer is not completely dissolved in a mixture prepared by: adding the vinyl alcohol polymer to water so as to give a concentration of 4% by mass; and stirring at 95° C. for 3 hrs. in the formula (1), R1, R2 and R3 each independently represent a hydrogen atom or a substituted or unsubstituted hydrocarbon group having 8 or less carbon atoms. Also provided include an additive for a drilling mud containing the vinyl alcohol polymer, a drilling mud containing the vinyl alcohol polymer as an additive, an additive for a drilling cement slurry containing the vinyl alcohol polymer, and a drilling cement slurry containing the vinyl alcohol polymer as an additive.

Abstract translation: 通过本发明提供的是通过下式（1）表示的结构和/或二硫键结构交联的乙烯醇聚合物，其中乙烯醇聚合物不完全溶解在通过以下步骤制备的混合物中：将乙烯醇聚合物 使水浓度达到4质量％; 并在95℃下搅拌3小时。 在式（1）中，R 1，R 2和R 3各自独立地表示氢原子或具有8个以下碳原子的取代或未取代的烃基。 还提供了包含含有乙烯醇聚合物的钻井泥浆的添加剂，含有乙烯醇聚合物作为添加剂的钻井泥浆，含有乙烯醇聚合物的钻井水泥浆料的添加剂和含有乙烯醇聚合物的钻井水泥浆料 作为添加剂。

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.