公开(公告)号：US20240093053A1

公开(公告)日：2024-03-21

申请号：US18519237

申请日：2023-11-27

Applicant: Arkema Inc.

Inventor： Donovan K. LUJAN ,  Wayne DEVONPORT

IPC: C09D161/02

CPC classification number: C09D161/02

Abstract: Disclosed are voided latex particles, useful as opacifying agents for coating compositions containing organic solvents. The particles have a hollow interior, which substantially maintains its integrity after the particles are placed in contact with an organic solvent at 25° C. for 30 days. The particles also have a hydrophilic polymeric interior shell surrounding the hollow interior that is swellable with an aqueous swelling solution. The particles have first and second polymeric intermediate shells, surrounding the interior shell, formed from polymers that are different from each other and different from the interior shell polymer. Finally, the particles have an outer polymeric shell, surrounding the interior shells, which is formed from up to 100% by weight, as polymerized units, of methyl methacrylate. The interior shells and the outer shell each have a Tg greater than 60° C. Also disclosed is a multi-stage emulsion process for making the particles.

公开(公告)号：US20230139026A1

公开(公告)日：2023-05-04

申请号：US17918131

申请日：2021-04-15

Applicant: Arkema Inc.

Inventor： Donovan K. LUJAN ,  Jeremy L. GROVE ,  Wenjun WU ,  Jeffrey A. SCHNEIDER

IPC: C09D133/24 ,  C09D133/12 ,  C09D5/02 ,  C09D151/08

Abstract: An anionically-stabilized aqueous emulsion composition includes a) a first emulsion polymer having a Tg from −60° C. to 40° C.; b) a volatile base; and c) polymeric particles, different from the first emulsion polymer and present in emulsified form. The c) polymeric particles are polyamine graft copolymers, in which vinyl monomers form a polymer grafted to a water-soluble amino-group containing polymer. The anionically-stabilized aqueous emulsion composition may have a pH of from 8 to 11.

公开(公告)号：US20190309140A1

公开(公告)日：2019-10-10

申请号：US16340183

申请日：2017-10-06

Applicant: Arkema Inc.

Inventor： Lily LIU ,  Daniel E. STARK ,  Wayne DEVONPORT ,  Donovan K. LUJAN

IPC: C08J9/32

Abstract: A thermal insulating additive, product formed therefrom, and method of making the same, wherein the thermal insulating additive comprises a plurality of hollow polymeric particles having an average particle size up to about 0.3 micrometers. The hollow polymeric particles exhibit a mechanical strength in a compression test up to about 420 psi and a thermal conductivity that is less than 0.150 W/m-k. The hollow polymeric particles are individually formed as an alkaline swellable core that is at least partially encapsulated with two or more shell layers; the alkaline swellable core prior to swelling exhibits an average particle size that is less than about 50 nanometers.