Polymer processing aids
AssigneeAddivant USA LLC
InventorsJeffrey J. Cernohous, William D. Sigworth, Hayder Zahalka, Keith A. Hughes
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Abstract
A polymer composition comprises a polymer matrix, a first fluorine-containing processing aid, and a second processing additive system that is substantially free of fluorine and that comprises: (a) a lubricant and (b) a surfactant.
Claims19
A polymer composition comprising a polymer matrix selected from the group consisting of polyamides, polyimides, polyurethanes, polyolefins, polystyrenes, polyesters, polycarbonates, polyketones, polyureas, polyvinyl resins, polyacrylates, polymethylacrylates and combinations thereof, a first fluorine-containing processing aid, and a second processing additive system that is substantially free of fluorine and that comprises:
- (a) a lubricant and (b) a surfactant.
(canceled)
The composition of any preceding claim, wherein the surfactant of the second processing additive system comprises a polyethylene-block-polyalkylene oxide oligomer.
A method of reducing melt defects produced during melt processing of a polymer matrix selected from the group consisting of polyamides, polyimides, polyurethanes, polyolefins, polystyrenes, polyesters, polycarbonates, polyketones, polyureas, polyvinyl resins, polyacrylates, polymethylacrylates and combinations thereof, the method comprising forming a blend of the polymer matrix with a first fluorine-containing processing aid, and a second processing additive system that is substantially free of fluorine and that comprises:
- (a) a lubricant and (b) a surfactant.
Dependencies are inferred from the claim text.