Importance

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Abstract

This invention relates to novel thermochromic quaternized polyacetylene salt derivatives which are visually imageable by exposure to a light source generating energy in a wavelength of from about 400 nm to about 1500 nm said salt derivative having a thermosensitivity of at least 50.degree. C. and defined by the formula ##STR1## or a homopolymer thereof wherein X is the N-quaternized monovalent radical of a dye having an optical absorbance in a wavelength of from about 400 nm to about 1500 nm; V is the cationic residue of a carboxyl, sulfonate, thioate, thiolic, thionic or phosphonate radical; n has a value of from 2 to 4 and X' is hydrogen, C.sub.4 to C.sub.25 alkyl, a polar hydrophilic group which promotes hydrogen bonding containing a radical of the group of an amino, amido, hydroxy, ester, ether, phenol, carboxy, halo, sulfonyl, sulfoxy, sulfinyl, silyl, silyoxy, phosphoro, phosphate, keto, carbamate, aldehyde, urea, urethane, a metal salt group or X' is selected from the group defined for X.

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First Claim