Process for continuously coagulating an aqueous latex and consolidating as a paste coagulum
AssigneeMonsanto Company
InventorJames L. Wallace
Life of this patent
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Abstract
A process for continuously coagulating a polymeric latex and consolidating as a paste coagulum in an apparatus comprising a barrel containing first and second feed ports, a rotor having opposed rows of angled tab blades and opposed wiper blades, a feed and closure means and a discharge port in an end of said barrel opposed to said feed ports, the steps comprising, continuously feeding an aqueous latex and an organic solvent simultaneously with a coagulant to said apparatus, continuously mixing said feeds and coagulating said latex forming a coagulum, consolidating said coagulum as a solvent polymer phase having the aqueous phase dispersed therein, said coagulum taking the form of a paste.
Claims22
A process for continuously coagulating a polymeric latex and consolidating as a paste coagulum in an apparatus comprising a barrel containing first and second feed ports, a rotor having opposed rows of angled tab blades and opposed wiper blades, a feed and closure means and a discharge port in an end of said barrel opposed to said feed ports, the steps comprising:
- A. continuously feeding an aqueous polymeric latex and an organic solvent to said first feed port simultaneously with a coagulant to said second feed port,
- B. continuously mixing said coagulant, said latex and said solvent uniformly in said barrel by means of said tab and wiper blades of said rotor rotating, in said barrel,
- C. coagulating said latex forming a coagulum of a solvent-polymer phase and an aqueous phase,
- D. conveying said coagulum along, the interior wall of said barrel toward said discharge port by the action of said angled tab blades on said coagulum while,
- E. consolidating said solvent-polymer phase to a continuous phase having an aqueous phase dispersed therein by the action of said wiper blades, said coagulum taking the form of a paste, and
- F. discharging said paste from said discharge port as a paste coagulum.
Dependencies are inferred from the claim text.