Polymer compositions, articles made from such compositions and methods for molding such compositions
AssigneeMilliken & Company
InventorsBart R. Gabriels, Daan P. Vanwynsberghe, Nathan A. Mehl
Life of this patent
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Abstract
A polymer composition comprises a thermoplastic polymer, a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof, and a fluoropolymer. A molded article comprises at least one wall defining a cavity, the wall having an opening therein permitting access to the cavity. The wall comprises a polymer composition comprising a thermoplastic polymer, a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof, and a fluoropolymer. A method for molding a polymer composition is also provided.
Claims12
A polymer composition comprising:
- (a) a thermoplastic polyolefin polymer;
- (b) a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof;
- and
- (c) a fluoropolymer,
- wherein the polymer composition has (i) an apparent melt viscosity of about 200 Pa·s or less at an apparent shear rate of 1,000 s−1 and a temperature of 190° C., and (ii) an apparent melt viscosity of 2,550 Pa·s or less at an apparent shear rate of 20 s−1 and a temperature of 190° C.
A method for making a polymer composition, the method comprising the steps of:
- (a) providing a first thermoplastic polyolefin polymer;
- (b) providing a masterbatch composition, the masterbatch composition comprising:
- (i) a second thermoplastic polyolefin polymer, (ii) a polymer additive selected from the group consisting of nucleating agents, clarifying agents, and combinations thereof;
- and (iii) a fluoropolymer;
- and
- (c) mixing the first thermoplastic polyolefin polymer and the masterbatch composition to produce the polymer composition, wherein the polymer composition has (i) an apparent melt viscosity of about 200 Pa·s or less at an apparent shear rate of 1,000 s−1 and a temperature of 190° C., and (ii) an apparent melt viscosity of 2,550 Pa·s or less at an apparent shear rate of 20 s−1 and a temperature of 190° C.
Dependencies are inferred from the claim text.