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US 2015/0307644 A1Published application
Increasing Rubber Phase Volume in Rubber-Modified Polystyrene
AssigneeFina Technology, Inc.
InventorsCarlos DeAnda, Graciela Morales, Jose M. Sosa, David Knoeppel
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Abstract
A process for producing rubber modified polymers having an increased rubber phase volume, including feeding a vinyl aromatic monomer and an elastomer to a polymerization reactor to form a reaction mixture, polymerizing the reaction mixture, combining a copolymer to the polymerized reaction mixture to form a combined mixture, subjecting the combined mixture to further polymerization, and obtaining a rubber modified polymer product from the further polymerization.
Claims18
1-16. (canceled)
A method for increasing rubber phase volume in high impact polystyrene, comprising:
- feeding at least one vinyl aromatic monomer, an elastomer, a copolymer, and an initiator to a first reactor to form a reaction mixture, wherein the copolymer is added in amounts ranging from 0.5 to 40 wt. % based on a total weight of the elastomer;
- polymerizing the reaction mixture in the first reactor to a point below the point at which phase inversion occurs;
- feeding the reaction mixture from the first reactor to a second reactor;
- and
- polymerizing the reaction mixture in the second reactor to at least a phase inversion point of the mixture.
2 more elements
(canceled)
Dependencies are inferred from the claim text.