Patent ID: 6620342
Filing Date: 2003-09-16
Classification: C09K,G02F,Y10T

Abstract:
An RECLT film comprising a conductive narrow composition distribution polyvinylidene fluoride copolymer film combined with an electrolyte and operatively associated with an RECLT material,wherein said narrow composition distribution polyvinylidene fluoride copolymer film has the characteristics of a polyvinylidene fluoride copolymer having up to 8 weight percent nominal hexafluoropropylene content having weight percent extractables within plus or minus 1.5% of the percent by weight extractables calculated by an equation selected from the group consisting of: a) Wt. % Extractables=1.7 (HFP mole %) 3.2, â€ƒand b) Wt. % Extractables=âˆ’1.2+1.5 (HFP mole %)âˆ’8Ã—10âˆ’6 (Mn) â€ƒwhen the HFP content is determined by Method A; or a copolymer of vinylidene fluoride and hexafluoropropylene, having 8 weight percent or greater nominal hexafluoropropylene content, having a DSC melting point equal to or less than that defined by the equation: DSC melt point Â° C.=166.7âˆ’2.9 (HFP wt %), â€ƒwhen the HFP content is determined by Method B; and wherein said RECLT material is selected from an electrochromic material, a reversible metal electrodeposition material, a liquid crystal material, and a dispersed particle material.