US 12,134,692 B2
Crosslinkable polymer-powder compositions redispersible in water
Timo Melchin, Mehring (DE); Ulf Dietrich, Burghausen (DE); and Heimo Wölfle, Traunstein (DE)
Assigned to Wacker Chemie AG, Munich (DE)
Appl. No. 17/433,785
Filed by Wacker Chemie AG, Munich (DE)
PCT Filed Feb. 26, 2019, PCT No. PCT/EP2019/054693
§ 371(c)(1), (2) Date Aug. 25, 2021,
PCT Pub. No. WO2020/173547, PCT Pub. Date Sep. 3, 2020.
Prior Publication US 2022/0135784 A1, May 5, 2022
Int. Cl. C08L 31/04 (2006.01); C04B 24/26 (2006.01); C04B 24/28 (2006.01); C04B 26/04 (2006.01); C04B 26/14 (2006.01); C08J 5/18 (2006.01); C08L 63/00 (2006.01)
CPC C08L 31/04 (2013.01) [C04B 24/2623 (2013.01); C04B 24/281 (2013.01); C04B 26/045 (2013.01); C04B 26/14 (2013.01); C08J 5/18 (2013.01); C08L 63/00 (2013.01); C08J 2331/04 (2013.01); C08J 2463/00 (2013.01); C08L 2201/54 (2013.01); C08L 2312/00 (2013.01)] 20 Claims
 
1. A crosslinkable polymer powder composition redispersible in water, comprising:
one or more protective colloid-stabilized vinyl ester polymers;
one or more compounds bearing epoxide groups; and
optionally one or more curing agents which crosslink with the one or more compounds bearing epoxide groups,
wherein the one or more protective colloid-stabilized vinyl ester polymers do not comprise any epoxide-functional monomer units,
and the crosslinkable polymer powder composition redispersible in water comprises ≥51% by weight, based on the total weight of the one or more protective colloid-stabilized vinyl ester polymers, of the one or more compounds bearing epoxide groups and
wherein a mixture of the one or more protective colloid-stabilized vinyl ester polymers and the one or more compounds bearing epoxide groups has a glass transition temperature Tg of −40° C. to +20° C., determined by differential scanning calorimetry,
wherein the crosslinkable polymer powder composition redispersible in water does not comprise an emulsifier.