Process for preparing particles of polyphenylene sulfide polymer
US11905364B2 · kind B2 · utility
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3References
6Claims
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Key dates
| Filing date | May 14, 2018 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Aug 18, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2467/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing particles of polyphenylene sulfide polymer (PPS), based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the PPS with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to PPS particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.