Release-paper base paper and method for producing same, and release paper

    公开(公告)号:US11643781B2

    公开(公告)日:2023-05-09

    申请号:US16498879

    申请日:2018-03-29

    申请人: KURARAY CO., LTD.

    摘要: Release paper base paper includes a substrate; and a coating agent containing a modified polyvinyl alcohol (A) and sodium acetate, the substrate coated with the coating agent, wherein the modified polyvinyl alcohol (A) has 0.005 mol % or more and less than 10 mol % of double bonds derived from unsaturated carboxylic acid or a derivative thereof (B) in side chains, has 1.4 mol % or more and 2.0 mol % or less of 1,2-glycol bond, units, and is water soluble, and a content of the sodium acetate relative to the modified polyvinyl alcohol (A) is 0.01 mass % or more and 10 mass % or less. The release paper base paper of the present invention is excellent in sealing properties for silicone. Use of the release paper base paper allows acceleration of curing of silicone in a release layer and improvement in adhesion between the substrate and the release layer.

    Spreading agent for agrochemicals, and agrochemical spray solution

    公开(公告)号:US11641853B2

    公开(公告)日:2023-05-09

    申请号:US16641002

    申请日:2018-08-24

    申请人: KURARAY CO., LTD.

    摘要: The present invention provides a spreading agent for agrochemicals having excellent spreadability particularly against surfaces of plant leaves. The present invention also provides an agrochemical spray solution comprising the spreading agent for agrochemicals, and that shows excellent storage stability (particularly viscosity stability) even during long storage. The present invention relates to a spreading agent for agrochemicals that comprises an ethylene-modified vinyl alcohol polymer (A) having an ethylene unit content of 1.0 mol % to 19 mol %, a 1,2-glycol linkage unit content of 1.2 mol % to 2.0 mol %, a viscosity-average degree of polymerization of 200 to 5,000, and a degree of saponification of 80 mol % to 99.9 mol %.

    Modified polyvinyl alcohol-based polymer and its application

    公开(公告)号:US11492436B2

    公开(公告)日:2022-11-08

    申请号:US17582202

    申请日:2022-01-24

    IPC分类号: C08F261/04 C08F16/06

    摘要: The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.

    Coating Material
    9.
    发明申请

    公开(公告)号:US20220081585A1

    公开(公告)日:2022-03-17

    申请号:US17534700

    申请日:2021-11-24

    摘要: Disclosed is a coating material comprising (B) an aqueous emulsion obtainable by polymerizing (b) a polymerizable unsaturated monomer in the presence of (A) a copolymer having a carboxyl group, wherein the polymerizable unsaturated monomer (b) comprises (b1) a (meth)acrylic acid ester, and the content of the (meth)acrylic acid ester (b1) is more than 95 parts by mass based on 100 parts by mass of the total mass of the polymerizable unsaturated monomer (b).