Fluorinated resin composition
View Patent ↗A fluorinated resin composition includes a copolymer (A); and a copolymer (B). A mass ratio (A/B) of the copolymer (A) to the copolymer (B) is from 60/40 to 99/1, and a volume flow rate is from 0.5 to 100 mm 3 /sec. The copolymer (A) comprises: units derived from a monomer (a) which is tetrafluoroethylene; units derived from a monomer (b) which is at least one member selected from ethylene, hexafluoropropylene and a perfluoro(alkyl vinyl ether). The copolymer (A) has carbonyl groups. The copolymer (B) comprises: units derived from the monomer (a); units derived from the monomer (b); and units derived from the monomer (c) having two or more polymerizable carbon-carbon double bonds. A content of the units derived from the monomer (c) is from 0.1 to 2 mol % based on total units in the copolymer (B).
1. A fluorinated resin composition comprising:
a copolymer (A); and
a copolymer (B),
wherein:
a mass ratio (AB) of the copolymer (A) to the copolymer (B) is from 60/40 to 99/1, and a volume flow rate is from 0.5 to 100 mm 3 /sec,
the copolymer (A) comprises:
units derived from a monomer (a) which is tetrafluoroethylene;
units derived from a monomer (b) which is at least one member selected from ethylene, hexafluoropropylene and a perfluoro(alkyl vinyl ether);
units derived from the monomer (d) having a carbonyl group and one polymerizable carbon-carbon double bond; and
optionally units derived from a monomer (c) having two or more polymerizable carbon-carbon double bonds, wherein a content of the units derived from the monomer (c) is from 0 to 0.05 mol % based on total units in the copolymer (A), and the copolymer (A) has carbonyl groups,
the copolymer (B) comprises:
units derived from the monomer (a);
units derived from the monomer (b); and
units derived from the monomer (c), wherein a content of the units derived from the monomer (c) is from 0.1 to 2 mol % based on total units in the copolymer (B), and
the volume flow rate is an extrusion rate (mm 3 /sec) when the fluorinated resin composition is extruded from an orifice having a diameter of 2.1 mm and a length of 8 mm under a pressure of 68.7 N/cm 2 at a temperature of the melting point+50° C. of the fluorinated resin composition.
2. The fluorinated resin composition according to claim 1 , wherein the monomer (d) is an acid anhydride of an unsaturated dicarboxylic acid.
3. The fluorinated resin composition according to claim 1 , wherein a content of carbonyl groups in a total of the copolymer (A) and the copolymer (B) is from 1,400 to 5,000, wherein the content of carbonyl groups is the number of carbonyl groups per 1×10 6 carbon atoms in a molecular chain of repeating units in the total of the copolymer (A) and the copolymer (B), as determined by an IR absorption spectrum analysis using a Fourier transform infrared spectrometer.
4. The fluorinated resin composition according to claim 1 , wherein a ratio (X/W) of a melt tension X (N) to a load W (N) at the time of measuring the melt tension X is from 0.35×10 −4 to 2.0×10 −4 .
5. The fluorinated resin composition according to claim 1 , wherein the monomer (c) is represented by formula (c1):
Y 1 —R f —Z 1 (c1)
wherein R f is a fluoroalkylene group, and Y 1 and Z 1 are each independently a vinyl group, a trifluorovinyl group or a trifluorovinyloxy group.
6. The fluorinated resin composition according to claim 5 , wherein R f is a perfluoroalkylene group having from 4 to 8 carbon atoms.
7. The fluorinated resin composition according to claim 1 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B) are both units derived from ethylene.
8. The fluorinated resin composition according to claim 7 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 30/70 to 70/30.
9. The fluorinated resin composition according to claim 7 , wherein each of the copolymer (A) and the copolymer (B) further comprises units derived from hexafluoropropylene, wherein a content of the units derived from hexafluoropropylene in the copolymer (A) is from 4 to 19 mol % based on the total units in the copolymer (A) and a content of the units derived from hexafluoropropylene in the copolymer (B) is from 4 to 19 mol % based on the total units in the copolymer (B).
10. The fluorinated resin composition according to claim 1 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B), are both units derived from hexafluoropropyl ene.
11. The fluorinated resin composition according to claim 10 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 60/40 to 97/3.
12. The fluorinated resin composition according to claim 1 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B) are both units derived from a perfluoro(alkyl vinyl ether).
13. The fluorinated resin composition according to claim 12 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 70/30 to 99/1.
14. The fluorinated resin composition according to claim 1 , wherein a melting point of the copolymer (A) is from 120 to 230° C.
15. A fluorinated resin composition comprising:
a copolymer (A); and
a copolymer (B),
wherein:
a mass ratio (A/B) of the copolymer (A) to the copolymer (B) is from 60/40 to 99/1, and a volume flow rate is from 0.5 to 100 mm 3 /sec,
the copolymer (A) comprises:
units derived from a monomer (a) which is tetrafluoroethylene;
units derived from a monomer (b) which is at least one member selected from ethylene, hexafluoropropylene and a perfluoro(alkyl vinyl ether); and
optionally units derived from a monomer (c) having two or more polymerizable carbon-carbon double bonds, wherein a content of the units derived from the monomer (c) is from 0 to 0.05 mol % based on total units in the copolymer (A), and the copolymer (A) has carbonyl groups,
the copolymer (B) comprises:
units derived from the monomer (a);
units derived from the monomer (b); and
units derived from the monomer (c), wherein a content of the units derived from the monomer (c) is from 0.1 to 2 mol % based on total units in the copolymer (B),
the volume flow rate is an extrusion rate (mm 3 /sec) when the fluorinated resin composition is extruded from an orifice having a diameter of 2.1 mm and a length of 8 mm under a pressure of 68.7 N/cm 2 at a temperature of the melting point+50° C. of the fluorinated resin composition, and
a content of carbonyl groups in a total of the copolymer (A) and the copolymer (B) is from 1,400 to 5,000, wherein the content of carbonyl groups is the number of carbonyl groups per 1×10 6 carbon atoms in a molecular chain of repeating units in the total of the copolymer (A) and the copolymer (B), as determined by an IR absorption spectrum analysis using a Fourier transform infrared spectrometer.
16. The fluorinated resin composition according to claim 15 , wherein the monomer (d) is an acid anhydride of an unsaturated dicarboxylic acid.
17. The fluorinated resin composition according to claim 15 , wherein a ratio (X/W) of a melt tension X (N) to a load W (N) at the time of measuring the melt tension X is from 0.35×10 −4 to 2.0×10 −4 .
18. The fluorinated resin composition according to claim 15 , wherein the monomer (c) is represented by formula (c1):
Y 1 —R f —Z 1 (c1)
wherein R f is a fluoroalkylene group, and Y 1 and Z 1 are each independently a vinyl group, a trifluorovinyl group or a trifluorovinyloxy group.
19. The fluorinated resin composition according to claim 18 , wherein R f is a perfluoroalkylene group having from 4 to 8 carbon atoms.
20. The fluorinated resin composition according to claim 15 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B) are both units derived from ethylene.
21. The fluorinated resin composition according to claim 20 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 30/70 to 70/30.
22. The fluorinated resin composition according to claim 20 , wherein each of the copolymer (A) and the copolymer (B) further comprises units derived from hexafluoropropylene, wherein a content of the units derived from hexafluoropropylene in the copolymer (A) is from 4 to 19 mol % based on the total units in the copolymer (A) and a content of the units derived from hexafluoropropylene in the copolymer (B) is from 4 to 19 mol % based on the total units in the copolymer (B).
23. The fluorinated resin composition according to claim 15 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B), are both units derived from hexafluoropropylene.
24. The fluorinated resin composition according to claim 23 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 60/40 to 97/3.
25. The fluorinated resin composition according to claim 15 , wherein the units derived from the monomer (b) in the copolymer (A) and the units derived from the monomer (b) in the copolymer (B) are both units derived from a perfluoro(alkyl vinyl ether).
26. The fluorinated resin composition according to claim 25 , wherein a molar ratio ([units derived from monomer (a)]/[units derived from monomer (b)]) of the units derived from the monomer (a) to the units derived from the monomer (b) in each of the copolymer (A) and the copolymer (B) is from 70/30 to 99/1.
27. The fluorinated resin composition according to claim 15 , wherein a melting point of the copolymer (A) is from 120 to 230° C.