公开(公告)号：US20250019314A1

公开(公告)日：2025-01-16

申请号：US18714303

申请日：2021-11-30

Applicant: WACKER CHEMIE AG

Inventor： Markus BANNWARTH ,  Sebastian KRICKL ,  Timo MELCHIN ,  Hans-Peter WEITZEL ,  Heimo WÖLFLE

IPC: C04B40/00 ,  C04B103/00 ,  C08J3/16

Abstract: Process for preparing protective colloid-stabilized polymers of ethylenically unsaturated monomers along with uses for the same. The process includes admixing aqueous dispersions of protective colloid-stabilized polymers of ethylenically unsaturated monomers with one or more drying aids and then drying the mixture. Where one or more salts of organic compounds containing 1 to 10 carbon atoms and optionally one or more protective colloids are used as drying aids. Where 0.1% to 20% by weight based on the dry weight of the aqueous dispersions of the protective colloid-stabilized polymers of salts of organic compounds containing 1 to 10 carbon atoms is used as drying aids.

公开(公告)号：US20220220646A1

公开(公告)日：2022-07-14

申请号：US17609386

申请日：2020-02-06

Applicant: WACKER CHEMIE AG

Inventor： Heimo WÖLFLE ,  Florian BAUERS ,  Holger Poths

IPC: D04H1/64 ,  C08L31/04

Abstract: An aqueous binder composition. The aqueous binder composition is obtainable by radically initiated polymerization of vinyl acetate and ethylene, in the presence of polyvinyl alcohol in an aqueous medium, wherein (a) 50 to 94 wt % of vinyl acetate, (b) 5 to 40 wt % of ethylene, (c) 0.2 to 5 wt % of acrylamide and/or methacrylamide, and (d) 0.2 to 5 wt % of maleic anhydride and/or maleic acid are copolymerized in the presence of a polyvinyl alcohol having a degree of hydrolysis of 80 to 99 mol %. The amounts in wt % are each based on the total weight of the comonomers and add up in each case to 100 wt %.