Daniel A Stark

US Patent:

20190144658, May 16, 2019

Filed:

Jun 19, 2017

Appl. No.:

16/307156

Inventors:

- King of Prussia PA, US
Wayne DEVONPORT - Apex NC, US
Daniel E. STARK - Raleigh NC, US
Matthew F. BOUDREAUX - Raleigh NC, US

International Classification:

C08L 31/04
C09D 131/04
C09J 9/00
C09D 5/03
C09J 131/04

Abstract:

A method of forming latex composite polymer particles produces hydrolysis resistant, composite polymer particles that can be used in aqueous latex compositions. Each of the latex composite polymer particles includes a first phase comprising a vinyl ester oligomer or polymer; optionally, an intermediate phase; and at least one second phase comprising an acrylic oligomer or polymer, a styrene oligomer or polymer, an acrylic-styrene copolymer, or mixtures thereof. The second phase and/or the intermediate phase at least partially encapsulates the first phase. The intermediate and second phases are more hydrophobic than the first phase. Optionally, the first phase, the second phase, and/or the intermediate phase may further comprise a cross-linking agent.