Fluorinated copolymer composition
AssigneesAGC Inc., Agc Chemicals Americas, Inc.
InventorsMasatoshi Abe, Katherine M. Sprick, Ryan T. Tucker
Life of this patent
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Abstract
A fluorinated copolymer composition includes a thermoplastic resin A and a fluorinated elastomer B dispersed within thermoplastic resin A. Thermoplastic resin A has a shear stress (τA) of greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec−1 and at 360° C. in accordance with ASTM D3835. Fluorinated elastomer B dispersed within thermoplastic resin A has an average dispersed particle size of less than 50 μm.
Claims20
A fluorinated copolymer composition comprising:
- a thermoplastic resin A having a shear stress (τA) of greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec−1 and at 360° C. in accordance with ASTM D3835;
- and
- a fluorinated elastomer B dispersed within thermoplastic resin A and having an average dispersed particle size of less than 50 μm;
- wherein the ratio of the viscosity of thermoplastic resin A to fluorinated elastomer B is from 1.1 to 1.3 when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec−1 and at 360° C. in accordance with ASTM D3835.
A fluorinated copolymer composition comprising:
- a thermoplastic resin A having a shear stress (τA) of greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec−1 and at 360° C. in accordance with ASTM D3835;
- and
- a fluorinated elastomer B dispersed within thermoplastic resin A and having an average dispersed particle size of less than 15 μm;
- wherein the ratio of a viscosity of thermoplastic resin A to fluorinated elastomer B is greater than 1.1 and less than 1.3 when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec−1 and at 360° C. in accordance with ASTM D3835;
- wherein thermoplastic resin A is at least one melt-moldable thermoplastic heat-resistant resin selected from the group consisting of a polyarylate, a polyether sulfone, a polyaryl sulfone, an aromatic polyamide, an aromatic polyether amide, an aromatic polyether imide, a polyphenylene sulfide, a polyaryl ether ketone, polyether ether ketone, a polyamideimide and a liquid crystal polyester;
- and
- wherein fluorinated elastomer B is selected from the group consisting of a copolymer having units derived from tetrafluoroethylene and propylene, a copolymer having units derived from hexafluoropropylene and vinylidene fluoride, and a copolymer having units derived from tetrafluoroethylene and a perfluoro(alkyl vinyl ether) with the perfluoro(alkyl vinyl ether) represented by the following formula (I),
- CF2=CF(ORF) (I)
- with RF being a C1-8 linear or branched perfluoroalkyl group.
A method of forming a fluorinated copolymer composition comprising:
- melt-kneading (i) a thermoplastic resin A with (ii) a fluorinated elastomer B such that fluorinated elastomer B is dispersed within thermoplastic resin A with an average dispersed particle size of less than 50 μm to form the fluorinated copolymer composition;
- wherein thermoplastic resin A has a shear stress (τA) greater than 0.11 MPa when measured with a capillary rheometer at a shear rate of 243 sec−1 and at 360° C. in accordance with ASTM D3835;
- and
- wherein the ratio of the viscosity of thermoplastic resin A to fluorinated elastomer B is from 1.1 to 1.3 when the viscosity is measured with a capillary rheometer at a shear rate of 12.1 sec−1 and at 360° C. in accordance with ASTM D3835.
Dependencies are inferred from the claim text.