公开(公告)号：US20200032458A1

公开(公告)日：2020-01-30

申请号：US16498507

申请日：2018-03-29

Applicant: KURARAY CO., LTD.

Inventor： Keisuke MORIKAWA ,  Taeko KAHARU

IPC: D21H27/00 ,  C09D129/04 ,  D21H21/16 ,  D21H19/12 ,  D21H19/32 ,  D21H19/82

Abstract: Release paper base paper, includes; a substrate; and a coating agent containing a polyvinyl alcohol (A) and a compound (B), the substrate coated with the coating agent, wherein the compound (B) is unsaturated carboxylic acid or a derivative thereof having a pKa of less than 4.00, and 0.1 part by mass or more and 20 parts by mass or less of the compound (B) is contained based on 100 parts by mass of the polyvinyl alcohol (A). The release paper base paper of the present invention is excellent in sealing properties for silicone and waterproofness. The release paper base paper of the present invention is also capable of accelerating curing of silicone in a release layer.

公开(公告)号：US20190338115A1

公开(公告)日：2019-11-07

申请号：US16473773

申请日：2017-12-27

Applicant: KURARAY CO., LTD.

Inventor： Tadahito FUKUHARA ,  Keisuke MORIKAWA ,  Taeko KAHARU

IPC: C08L29/04 ,  C08F2/20 ,  C08F2/44 ,  C08K5/053 ,  C08F216/06 ,  D21H27/00 ,  D21H19/60

Abstract: There is provided a composition (C) comprising a modified PVA (A) and a compound (B), wherein the modified PVA (A) contains 0.01 mol % or more and less than 2 mol % of double bonds derived from an unsaturated carboxylic acid or a derivative thereof in side chains; the compound (B) is a compound having a conjugated double bond and two or more hydroxy groups bonded to the conjugated double bond, or a salt or oxide thereof; and a content of the compound (B) in the composition (C) is 0.001 parts by mass or more and less than 5 parts by mass based on 100 parts by mass of the modified PVA (A). The composition (C) has excellent hue, contains less insolubles in water, and has excellent water solubility.