Title:
PROCESS FOR PRODUCING FLUORINE-CONTAINING COPOLYMER COMPOSITION AND FLUOROCARBON-RESIN MOLDED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2011/129405
Kind Code:
A1
Abstract:
Provided is a process for producing an ethylene/tetrafluoroethylene copolymer composition that has good moldability and that produces molded products having excellent mechanical characteristics. The process for producing a fluorine-containing copolymer composition involves: heating a mixture (D) that contains a high-molecular-weight fluorine-containing copolymer (A), a low-molecular-weight fluorine-containing copolymer (B), and a solvent (C) to a temperature higher than or equal to a temperature at which the fluorine-containing copolymer (A) and the fluorine-containing copolymer (B) dissolve into the solvent (C) and thereby making the mixture (D) into a solution, said high-molecular-weight fluorine-containing copolymer (A) having a melt viscosity of from 1500 to 35000 Pa·s at 15°C above the melting point and including tetrafluoroethylene-based repeating units and ethylene-based repeating units, said low-molecular-weight fluorine-containing copolymer (B) having a lower molecular weight than said fluorine-containing copolymer (A), having a melt viscosity of from 50 to 3000 Pa·s at 15°C above the melting point, having a melt viscosity, at a temperature 15°C above the melting point of said fluorine-containing copolymer (A), that is less than or equal to one-fifth of the melt viscosity of said fluorine-containing copolymer (A) at said temperature, and including tetrafluoroethylene-based repeating units and ethylene-based repeating units, said solvent (C) being capable of dissolving said fluorine-containing copolymer (A) and said fluorine-containing copolymer (B) at a temperature lower than or equal to the melting point of said fluorine-containing copolymer (A) and the melting point of said fluorine-containing copolymer (B); and then removing the solvent (C).
Inventors:
IRUYA KEN (JP)
SATO TAKASHI (JP)
SATO TAKASHI (JP)
Application Number:
PCT/JP2011/059297
Publication Date:
October 20, 2011
Filing Date:
April 14, 2011
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
IRUYA KEN (JP)
SATO TAKASHI (JP)
IRUYA KEN (JP)
SATO TAKASHI (JP)
International Classes:
C08J3/00; C08L27/18; C08K5/03; C08K5/06; C08K5/07
Foreign References:
| JP2000212365A | 2000-08-02 | |||
| JP2000334731A | 2000-12-05 | |||
| JP2006038962A | 2006-02-09 | |||
| JP2000212365A | 2000-08-02 |
Other References:
See also references of EP 2559730A4
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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Claims: