Fluorine-containing copolymer and molded article
AssigneeDaikin Industries, Ltd.
InventorsKenji Ishii, Hideki Kono
Life of this patent
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Abstract
A fluorocopolymer having tetrafluoroethylene [TFE]-derived copolymerized units and hexafluoropropylene [HFP]-derived copolymerized units, which has the following characteristics (a) and (b): (a) a thermal melting curve obtained by primary heating in differential scanning calorimetry shows a melting point within the range of 240 to 280° C. and a melting point peak portion area accounts for at least 60% of heats of fusion area; and (b) the product of a MFR (g/10 minutes) and a resin pressure (MPa) is not larger than 40.
Claims10
A fluorocopolymer comprising tetrafluoroethylene [TFE]-derived copolymerized units and hexafluoropropylene [HFP]-derived copolymerized units, which has a following characteristics (a) and (b):
- (a) a thermal melting curve obtained by primary heating in differential scanning calorimetry shows a melting point within the range of 240 to 280° C. and a melting point peak portion area accounts for at least 60% of heats of fusion area;
- and
- (b) the product of a MFR (g/10 minutes) and a resin pressure (MPa) is not larger than 40, and
- wherein the number of —COF groups, —COOH groups, —CH2OH groups, —CONH2 groups, —COOCH3 groups and —CF2H groups in the fluorocopolymer is not larger than 50 per 106 main chain carbon atoms.
Dependencies are inferred from the claim text.