Invention Publication
- Patent Title: AN AQUEOUS SEPARATION PROCESS FOR MULTIPLE POLYMER COMPONENTS
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Application No.: US18553590Application Date: 2022-06-17
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Publication No.: US20240051187A1Publication Date: 2024-02-15
- Inventor: Craig F. Gorin , Jin Wang , Scott T. Matteucci , Jill M. Martin , En Wang
- Applicant: Dow Global Technologies LLC
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies LLC
- Current Assignee: Dow Global Technologies LLC
- Current Assignee Address: US MI Midland
- International Application: PCT/US2022/033940 2022.06.17
- Date entered country: 2023-10-02
- Main IPC: B29B17/02
- IPC: B29B17/02 ; C08J11/08

Abstract:
A process for separating and recovering at least one polymer component from a melt of a multiple number of polymer components including the steps of: (A) shearing a multi-polymer component melt in the presence of a pressurized aqueous solution; wherein the multi-polymer component melt comprises a blend of at least a first polymer component and at least a second polymer component; wherein the multi-polymer component melt has at least two melting temperatures, at least two glass transition temperatures or combinations thereof; wherein the pressurized aqueous solution comprises an aqueous liquid mixture of: (i) water, and (ii) at least one dispersing agent; wherein the shearing of the multi-polymer component melt in contact with the pressurized aqueous solution forms a dispersion, particles, or strands of the at least one first polymer component having an enriched first polymer component concentration; and (B) after the shearing of step (A), isolating the at least first polymer component from the other polymer components of the multi-polymer component melt by separating the dispersion, particles, or strands of the at least one first polymer component having an enriched first polymer component concentration from the water, the at least one dispersing agent, the at least second polymer component, and any remaining thermoplastic polymer resins present in the mixture of the multi-polymer component melt in the pressurized aqueous solution.
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