Core-shell graft copolymers with improved surface properties
US11674033B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Nov 16, 2018 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Jun 6, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a core-shell graft copolymer produced by coagulation of an aqueous latex comprising a quantity of particles of the copolymer and a quantity of a fatty acid surfactant, wherein the coagulation involves the addition of a quantity of a multivalent metal salt, preferably a bivalent or trivalent metal salt. Such copolymer provides in an improvement of the surface properties of moulded articles produced from such copolymers, as demonstrated by a reduction of the content of gels in the surface layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.