Patent ID: 6569361
Filing Date: 2003-05-27
Classification: C09K,G02F

Abstract:
A process for preparing the polymer according to a polymer of the Formula I dissolved in at least one polar solventEâ€”[ . . . (B1â€”Zâ€”)a . . . (B2â€”Yâ€”)b . . . ]câ€”Bâ€”Eâ€ƒâ€ƒ(I) wherein the units â€”B1â€”Zâ€” and â€”B2â€”Yâ€” are linked to one another alternately, randomly or in blocks,Y and Z, independently of one another, are a radical RED1 or OX2, wherein OX2 is a reversibly electrochemically reducible substituent which is converted into RED2 by electron take-up at a cathode, wherein an increase in the absorbance in the visible region of the spectrum from a colorless or weakly colored form into a colored form is associated with the electron take-up, and wherein in each case the colorless or weakly colored form is re-formed after charge equalization, RED1 is a reversibly electrochemically oxidizable substituent which is converted into OX1 by electron release at an anode, wherein an increase in the absorbance in the visible region of the spectrum from a colorless or weakly colored form into a colored form is associated with the electron release, and wherein the colorless or weakly colored form is reformed after charge equalization, and B is B1 or B2, B1 and B2 are identical or different bridging units, E is an end group of the polymer chain, a and b are the molar fractions of the monomer units â€”B1â€”Zâ€” and â€”B2â€”Yâ€”, which have any desired values between 0 and 1, wherein a=1âˆ’b, c is a number-average degree of polymerization cn and is from 3 to 200,000, â€ƒwherein the ratio between cn and the weight-average degree of polymerization cw (polymolarity index) Q=cw/cn is between 1.1 and 100, the process comprising (A) subjecting one or more RED1- and/or OX2-containing monomers of formulae selected from the group consisting of XXVI, XXVII and XXVIII to a polymerization, polycondensation or polyaddition reaction or a polymer-analogous reaction: X1â€”B6â€”OX2â€”B7â€”X2â€ƒâ€ƒ(XXVI), X1â€”B6â€”RED1â€”B7â€”X2â€ƒâ€ƒ(XXVII), X1â€”B6â€”OX2â€”B8â€”RED1â€”B7â€”X2â€ƒâ€ƒ(XXVIII), â€ƒwherein OX2 is the radical of a reversibly electrochemically reducible redox system, RED1 is the radical of a reversibly electrochemically oxidizable redox system, B6, B7 and B8 are the bridging units, and X1 and X2 are each a group which is capable of polymerization, poly-condensation or polyaddition or a group which is capable of polymer-analogous reaction, and (B) dissolving the resulting polymer in at least one dipolar aprotic solvent.