公开(公告)号：US20160251466A1

公开(公告)日：2016-09-01

申请号：US15021305

申请日：2014-09-11

Applicant: KURARAY CO., LTD.

Inventor： Masaki KATO ,  Hideki MAKI ,  Keishi HACHIYA ,  Masako KAWAGOE ,  Yoko MORI

IPC: C08F216/06 ,  B41M5/52 ,  D21H27/00 ,  D06M15/333 ,  C09D129/04 ,  D21H19/20

CPC classification number: C08F216/06 ,  B41M5/337 ,  B41M5/5254 ,  B41M2205/02 ,  B41M2205/32 ,  B65D65/42 ,  C08F8/12 ,  C08F16/00 ,  C09D129/04 ,  D06M15/333 ,  D21H17/36 ,  D21H19/20 ,  D21H19/60 ,  D21H21/16 ,  D21H27/001 ,  D21H27/10

Abstract: Provided by the present invention is a PVA having highly harmonized adequate water solubility, thickening property and coating film strength, and having superior storage stability in terms of the viscosity in an aqueous solution. A vinyl alcohol polymer having a ratio (Mw (A)/Mn (A)) of the weight average molecular weight (Mw (A)) to the number average molecular weight (Mn (A)) of 3 or greater and 8 or less, and being capable of giving a vinyl alcohol polymer having a ratio (Mw/Mn) of a weight average molecular weight (Mw) to a number average molecular weight (Mn) of 2 or greater and less than 3 when treated at 40 ° C. for 1 hour in a sodium hydroxide solution.

Abstract translation: 本发明提供一种具有高度协调的足够的水溶性，增稠性和涂膜强度的PVA，并且在水溶液中的粘度方面具有优异的储存稳定性。 重均分子量（Mw（A））与数均分子量（Mn（A））的比（Mw（A）/ Mn（A））为3以上且8以下的乙烯醇系聚合物 并且能够在40℃下处理时能够得到重均分子量（Mw）与数均分子量（Mn）的比（Mw / Mn）为2以上且小于3的乙烯醇聚合物 在氢氧化钠溶液中1小时。

公开(公告)号：US20170369601A1

公开(公告)日：2017-12-28

申请号：US15537996

申请日：2015-12-24

Applicant: KURARAY CO., LTD. ,  KURARAY ASIA PACIFIC PTE. LTD.

Inventor： Hideki MAKI ,  Masato NAKAMAE

IPC: C08F2/20 ,  C09J157/00 ,  C09J133/04 ,  C09J131/02 ,  C09J125/04 ,  C09J109/00 ,  C09J11/08 ,  C08L101/02 ,  C08L29/04 ,  C09J175/04 ,  C08F2/24

CPC classification number: C08F2/20 ,  C08F2/24 ,  C08F8/12 ,  C08F261/04 ,  C08G18/2835 ,  C08G18/6212 ,  C08G18/706 ,  C08G18/7671 ,  C08G2170/80 ,  C08L29/04 ,  C08L101/02 ,  C09J11/08 ,  C09J109/00 ,  C09J125/04 ,  C09J131/02 ,  C09J133/04 ,  C09J151/003 ,  C09J157/00 ,  C09J175/04 ,  C08F216/06 ,  C08F218/08 ,  C08F2/30

Abstract: The present invention relates to an aqueous emulsion including an ethylenically unsaturated monomer unit-containing polymer as a dispersoid and a polyvinyl alcohol as a dispersant. The content of a free polyvinyl alcohol in the aqueous emulsion is 0.2 to 20 parts by mass relative to 100 parts by mass of the ethylenically unsaturated monomer unit-containing polymer. The free polyvinyl alcohol has a degree of saponification of 80.0 to 99.5 mol % and a viscosity-average degree of polymerization of 200 to 5000, and the free polyvinyl alcohol has a symmetry factor (W0.05h/2f) that satisfies the following expression (1) as determined by gradient high-performance liquid chromatography for reversed-phase separation using a water-acetone eluent according to JIS K 0124 (2011). 0.85≦W0.05h/2f≦1.30  (1) (The definitions of the symbols are omitted.)