Back to results
US 8,997,797 B2Granted
Fluororesin and riser pipe
AssigneeDaikin Industries, Ltd.
InventorsTakahiro Kitahara, Takuma Kawabe
Life of this patent
Estimating the term…
Abstract
An object of the present invention it to provide a novel fluororesin that has excellent mechanical strength and chemical resistance, and very low permeability at high temperature. The fluorine resin a copolymer that includes copolymerized units derived from tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride. The fluororesin has a storage modulus E′, as measured at 170° C. by a dynamic viscoelasticity analysis, in the range of 60 to 400 MPa.
Claims9
A fluororesin comprising
- a copolymer that consists of copolymerized units derived from tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride,
- wherein the fluororesin has a storage modulus E′, as measured at 170° C. by a dynamic viscoelasticity analysis, in the range of 60 to 400 MPa and
- wherein the copolymer consists of 55.0 to 90.0 mol % of copolymerized units derived from tetrafluoroethylene, 5.0 to 44.9 mol % of copolymerized units derived from vinylidene fluoride, and 0.1 to 10.0 mol % of copolymerized units derived from an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride, the ethylenically unsaturated monomer being represented by the formula (1):
- CX1X2═CX3(CF2)nX4
- wherein X1, X2, X3, and X4, which may be the same or different, each represent H, F, or Cl, and n is an integer of 0 to 8.
2 more elements
A fluororesin comprising
- a copolymer that consists of copolymerized units derived from tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride,
- wherein the fluororesin has a storage modulus E′, as measured at 170° C. by a dynamic viscoelasticity analysis, in the range of 60 to 400 MPa, and
- wherein the copolymer consists of 55.0 to 90.0 mol % of copolymerized units derived from tetrafluoroethylene, 9.2 to 44.2 mol % of copolymerized units derived from vinylidene fluoride, and 0.1 to 0.8 mol % of copolymerized units derived from an ethylenically unsaturated monomer represented by the formula (2):
- CF2═CF—ORf1
- wherein Rf1 represents a C1-3 alkyl group or a C1-3 fluoro alkyl group.
2 more elements
A fluororesin comprising
- a copolymer that comprises copolymerized units derived from tetrafluoroethylene, vinylidene fluoride, and an ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride,
- wherein the fluororesin has a storage modulus E′, as measured at 170° C. by a dynamic viscoelasticity analysis, in the range of 60 to 400 MPa,
- wherein the copolymer comprises 55.0 to 90.0 mol % of copolymerized units derived from tetrafluoroethylene, 5.0 to 44.8 mol % of copolymerized units derived from vinylidene fluoride, 0.1 to 10.0 mol % of copolymerized units derived from a first ethylenically unsaturated monomer other than tetrafluoroethylene and vinylidene fluoride, and 0.1 to 0.8 mol % of copolymerized units derived from a second ethylenically unsaturated monomer, the first ethylenically unsaturated monomer being represented by the formula (1):
- CX1X2═CX3(CF2)nX4
- wherein X1, X2, X3, and X4, which may be the same or different, each represent H, F, or Cl, and n is an integer of 0 to 8, the second ethylenically unsaturated monomer being represented by the formula (2):
- CF2═CF—ORf1
- wherein Rf1 represents a C1-3 alkyl group or a C1-3 fluoro alkyl group.
4 more elements
Dependencies are inferred from the claim text.