Invention Grant
- Patent Title: Multi-stage latex particles with peg in outer stage
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Application No.: US17818119Application Date: 2022-08-08
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Publication No.: US11718697B2Publication Date: 2023-08-08
- Inventor: Cristian Grigoras , Yong Yang , Rogina Saad , Richard Geurtsen
- Applicant: Columbia Insurance Company
- Applicant Address: US NE Omaha
- Assignee: Columbia Insurance Company
- Current Assignee: Columbia Insurance Company
- Current Assignee Address: US NE Omaha
- Agency: The H.T. Than Law Group
- Main IPC: C08L13/02
- IPC: C08L13/02 ; C08F265/06 ; C08F220/28 ; C08F220/14 ; C09D151/00 ; C08F283/06

Abstract:
Disclosed herein is an aqueous latex composition comprising a substantially acrylic core-shell latex, wherein a water-retaining monomer is copolymerized to the shell. The Tg of the core ranges from about 0° C. to about 12° C., and the Tg of the shell ranges from about 13° C. to about 40° C. The mean volume average particle size of the latex ranges from about 125 nm to about 200 nm. The core-shell latex comprises at least one acrylic monomer having a solubility that ranges about 10 g/L to about 30 g/L at 30° C., and this at least one acrylic monomer is present in the shell polymer in an amount greater than about 50 wt. % of all monomers in the shell. Preferably, the at least one acrylic monomer is methyl methacrylate.
Public/Granted literature
- US20220403085A1 MULTI-STAGE LATEX PARTICLES WITH PEG IN OUTER STAGE Public/Granted day:2022-12-22
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