Method for isolating polymer resin from solution slurries
AssigneeGeneral Electric Company
InventorsGary Mell Bates, Hua Guo
Life of this patent
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Abstract
Soluble polymer resins are separated from a solution slurry with the use of a precipitation aid where the slurry contains the polymer resin in both a soluble form and a solid particulate phase. The precipitation aid absorbs onto the surface of the solid polymer resin particulates and is a suitable blend component for formulations of the polymer resin. The solution slurry may be concentrated and heated prior to precipitation of the polymer resin.
Claims26
A method for separating a soluble polymer resin from a solution slurry, which contains a solid phase of said polymer resin as particulates, said method comprising:
- adding to a solution slurry which contains at least one soluble polymer resin selected from the group consisting of polycarbonates, polystyrenes, rubber modified polystyrenes, polyphenylene ethers, polyetherimides, polyamides, and polyesters and a solid phase of said polymer resin as particulates, a linear or chain-branched polymeric precipitation aid which absorbs onto the surface of the polymer resin particulates in said solution slurry, wherein said precipitation aid is a suitable blend component for formulations of said polymer resin;
- and
- adding the solution slurry, which contains said precipitation aid, to a non-solvent for the soluble polymer resin to precipitate the soluble polymer resin within said solution slurry.
A method for separating a soluble polyphenylene ether resin from a solution slurry, said method comprising:
- adding to a solution slurry which contains at least one soluble polyphenylene ether resin and a solid phase of polyphenylene ether resin particulates, a linear or chain-branched polymeric precipitation aid which absorbs onto the surface of the polyphenylene ether particulates within said solution slurry, wherein said precipitation aid is a blend component for the final formulation of said polyphenylene ether resin;
- adding the solution slurry, which contains the precipitation aid, to a non-solvent for the soluble polyphenylene ether resin so as to precipitate said soluble polyphenylene ether resin in said solution slurry.
Dependencies are inferred from the claim text.