HIGH MOLECULAR WEIGHT POLYMERIC DISPERSIONS WITH TAILORED MOLECULAR WEIGHT OF POLYMERIC DISPERSANT

    公开(公告)号:US20230416440A1

    公开(公告)日:2023-12-28

    申请号:US18332840

    申请日:2023-06-12

    IPC分类号: C08F265/04

    CPC分类号: C08F265/04

    摘要: Methods for manufacturing a polymer dispersion, polymer dispersions, and their use are provided herein. The methods of manufacturing the polymer dispersion comprise the steps of providing a reaction mixture in an aqueous medium comprising a polymeric dispersant and a monomer composition comprising radically polymerizable monomers, and subjecting the monomer composition in the reaction mixture to a radical polymerization to synthesize a dispersed polymer so as to form the polymer dispersion, wherein the weight average molecular weight of the dispersed polymer is in a specified narrow range. These polymer dispersions are designated as water-in-water (w/w) polymer dispersions.

    Preparation method of temperature/pH-responsive polycarboxylic acid

    公开(公告)号:US11149104B2

    公开(公告)日:2021-10-19

    申请号:US16571017

    申请日:2019-09-13

    摘要: A preparation method of comb structure temperature/pH-responsive polycarboxylic acid adopts acrylic ester, temperature/pH-responsive monomer and other raw materials to obtain polycarboxylic acid via acrylate monomer self-polymerization, grafting with temperature/pH-responsive monomers and hydrolyzation. In other words, acrylate is used as the reaction monomer to polymerize polyacrylate with controllable molecular weight under the action of initiator and chain transfer agent, then the graft copolymers are copolymerized with temperature/pH-responsive monomers to obtain graft copolymers with acrylate polymers main chain and temperature/pH-responsive polymer side chains. Finally, the graft copolymer is hydrolyzed to obtain the comb structure temperature/pH-responsive polycarboxylic acid with polyacrylic acid main chain and temperature/pH-responsive monomer side chain.