Method of coagulating and isolating graft copolymers from latices
US6156875A · kind A · utility
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5References
12Claims
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Key dates
| Filing date | Jun 25, 1998 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Jun 25, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F291/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Graft copolymer particles comprising an elastomeric base polymer such as polybutadiene and grafted chains of a thermoplastic, non-elastomeric polymer such as styrene-acrylonitrile are coagulated for isolation from aqueous emulsion by subjecting the emulsion to mechanical shear in the absence of chemical coagulants at a temperature greater than or equal to the glass transition temperature of the thermoplastic, non-elastomeric portion of the copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.