Process for forming rubber latex from branched polymers

    公开(公告)号:US12037485B2

    公开(公告)日:2024-07-16

    申请号:US17292886

    申请日:2019-12-03

    IPC分类号: C08L53/02 C08J5/18

    摘要: The disclosure relates to rubber latex formed from any of: branched block copolymers derived from alkenyl aromatic hydrocarbon—1,3-diene monomer system, and branched polyisoprene homopolymers derived from isoprene. The polymers in embodiments are obtained by polymerization in the presence of an anionic initiator; at a temperature from 0° C. to 100° C.; followed by coupling with a multifunctional coupling agent of formula (R1O)3Si—Y—Si(OR2)3, wherein R1 and R2 are independently C1-C6 alkyl groups; and Y is a C2-C8 alkylene group. The polymers are obtained as rubber cements having high solids content and low zero shear viscosities. The rubber cements are valuable for making latices for further applications.

    Emulsion composition, a coating agent and a laminate

    公开(公告)号:US12031031B2

    公开(公告)日:2024-07-09

    申请号:US17192666

    申请日:2021-03-04

    发明人: Kentaro Watanabe

    摘要: One object of the present invention is to provide an emulsion composition comprising a silicone and an emulsion of a resin having a film forming property, which emulsion composition may provide a coating agent which effectively exhibits slidability of silicone on a substrate, while maintaining transparency. Another object of the present invention is to provide a laminate having a film made of the coating agent. The present invention provides an emulsion composition comprising (I) an emulsion of a resin having a film forming property in a solid content of 60 to 99.9 parts by mass and (II) an emulsion of a silicone-acrylic core-shell resin in solid content of 0.1 to 40 parts by mass, a total mass of the solid contents of components (I) and (II) being 100 parts by mass, wherein a core of the silicone-acrylic core-shell resin (II) is composed of an organopolysiloxane (A), a shell layer of the silicone-acrylic core-shell resin (II) is composed of a poly(meth)acrylate ester (B), a mass ratio of the organopolysiloxane (A) to the poly(meth)acrylate ester (B) is in a range of 40:60 to 95:5, and a covering ratio by the poly(meth)acrylate ester on a surface of the silicone-acrylic core-shell resin is at least 50%.