Title:
VINYLIDENE FLUORIDE POLYMER POWDER AND VINYLIDENE FLUORIDE POLYMER SOLUTION
Document Type and Number:
WIPO Patent Application WO/2011/052666
Kind Code:
A1
Abstract:
Provided are a vinylidene fluoride polymer powder which is well soluble in an aprotic polar solvent, and a vinylidene fluoride polymer solution prepared from both the powder and an aprotic polar solvent. The vinylidene fluoride polymer powder has an NMP penetration of 12 to 100% as determined by a specific NMP penetration test. The NMP penetration test comprises: forming a lower sea sand layer in a glass tube which has an inside diameter of 8mm and in which a lower section packed with absorbent cotton has been formed; introducing 1g of the vinylidene fluoride polymer powder onto the surface of the lower sea sand layer to form a vinylidene fluoride polymer powder layer; forming an upper sea sand layer on the surface of the powder layer; pouring 5mL of methylene blue-dyed NMP on the surface of the upper sea sand layer; determining, 3 minutes after the pouring, the penetration depth of NMP into the vinylidene fluoride polymer powder layer and the thickness of the vinylidene fluoride polymer powder layer; and calculating the NMP penetration of the powder by dividing the penetration depth by the thickness and multiplying the obtained value by 100.
Inventors:
IGARASHI TAMITO (JP)
SAKABE HIROSHI (JP)
SUGAWARA EMI (JP)
MUTOU SHINTAROU (JP)
SAKABE HIROSHI (JP)
SUGAWARA EMI (JP)
MUTOU SHINTAROU (JP)
Application Number:
PCT/JP2010/069131
Publication Date:
May 05, 2011
Filing Date:
October 28, 2010
Export Citation:
Assignee:
KUREHA CORP (JP)
IGARASHI TAMITO (JP)
SAKABE HIROSHI (JP)
SUGAWARA EMI (JP)
MUTOU SHINTAROU (JP)
IGARASHI TAMITO (JP)
SAKABE HIROSHI (JP)
SUGAWARA EMI (JP)
MUTOU SHINTAROU (JP)
International Classes:
C08F14/22; H01G11/38; H01G11/48; H01M4/62
Domestic Patent References:
| WO2009047969A1 | 2009-04-16 | |||
| WO2008005745A2 | 2008-01-10 | |||
| WO2009047969A1 | 2009-04-16 |
Foreign References:
| JPH0834820A | 1996-02-06 | |||
| JPH10298298A | 1998-11-10 | |||
| JPH06108103A | 1994-04-19 |
Other References:
See also references of EP 2495265A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
Patent business corporation SSINPAT (JP)
Patent business corporation SSINPAT (JP)
Download PDF: