公开(公告)号：US20230312972A1

公开(公告)日：2023-10-05

申请号：US18022766

申请日：2021-08-26

Applicant: Arkema Inc.

Inventor： Yuting LI ,  Robert P. EISENHARDT ,  Wenjun WU ,  Michael DREWERY ,  Jeffrey P. ARDENT

IPC: C09D147/00 ,  C08F220/10 ,  C08F2/44

CPC classification number: C09D147/00 ,  C08F220/10 ,  C08F2/44 ,  C08F2438/00

Abstract: Multi-stage polymeric particles are prepared as a water-borne emulsion, including a first-formed lower Tg soft stage and a second-formed higher Tg hard stage. The polymeric particles include, in both stages: one or more free radical polymerizable ethylenically unsaturated monomers; 0 to 3 wt % of free radical polymerizable surfactant monomer; 0 to 4 wt % of free radical poly-merizable monomer having a beta dicarbonyl functionality; 0 to 2 wt % of monomer selected from acrylamide, diacetone acrylamide, 2-hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylates, and hydroxybutyl (meth)acrylates and mixtures thereof; 0-1.9 wt % of free radical polymerizable polyethylenically unsaturated monomers; 0.1 to 1.9% of free radical polymerizable monomer containing phosphorus acid or a salt thereof in the first stage, and 0.1 to 5 wt % of a free radical polymerizable monomer containing phosphorus acid or salt thereof in the second stage. Multi-stage polymeric-particle-based-resin is formulated into direct to metal coatings, having good block, corrosion and excellent humidity resistance.