公开(公告)号：US10899918B2

公开(公告)日：2021-01-26

申请号：US16307156

申请日：2017-06-19

Applicant: Arkema Inc.

Inventor： Lily Liu ,  Wayne Devonport ,  Daniel E. Stark ,  Matthew F. Boudreaux

IPC: C08L31/04 ,  C08F285/00 ,  C08F263/04 ,  C09D5/03 ,  C09D131/04 ,  C09J9/00 ,  C09J131/04

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.

公开(公告)号：US10442882B2

公开(公告)日：2019-10-15

申请号：US15504373

申请日：2015-08-07

Applicant: Arkema Inc.

Inventor： Lily Liu ,  Wayne Devonport ,  Daniel Edward Stark ,  Matthew F. Boudreaux

IPC: C08F285/00 ,  C08J9/16 ,  C08F6/00

Abstract: A process for forming voided latex particles is improved by combining swelling and polymerization of an outer shell into a single step. The process includes contacting multi-stage emulsion polymer particles comprising a core, at least one intermediate shell, with a swelling agent, and polymerizing an outer shell after said contacting with swelling agent wherein the core and the at least one intermediate shell are contacted with swelling agent in the presence of less than 0.5% monomer based on the weight of the multi-stage emulsion polymer particles, and substantially all of the swelling occurs during polymerization of the outer shell.

公开(公告)号：US20170240716A1

公开(公告)日：2017-08-24

申请号：US15504375

申请日：2015-08-07

Applicant: Arkema Inc.

Inventor： Lily Liu ,  Wayne Devonport ,  Daniel Edward Stark ,  Matthew F. Boudreaux

IPC: C08J9/224 ,  C08J9/28 ,  C08J9/16

CPC classification number: C08J9/224 ,  C08F6/006 ,  C08F285/00 ,  C08J9/16 ,  C08J9/28 ,  C08J2201/04 ,  C08J2333/12 ,  C08J2433/12 ,  C08L51/003

Abstract: A process for forming voided latex particles is improved by combining swelling and polymerization of an outer shell into a single step. The process includes contacting multi-stage emulsion polymer particles comprising a core, at least one intermediate shell, with a swelling agent, and polymerizing an outer shell after said contacting with swelling agent wherein the core and the at least one intermediate shell are contacted with swelling agent in the presence of less than 0.5% monomer based on the weight of the multi-stage emulsion polymer particles, and substantially all of the swelling occurs during polymerization of the outer shell.