FIELD: chemistry.
SUBSTANCE: claimed invention relates to thermal lithographic printing forms and their coatings. Described is polymer, which has general formula, presented below, where a, b, c and d are molar ratios, varying between approximately 0.01 and approximately 0.90; A1 represents monomer units, containing cyano-containing suspended group, in which cyano is not bound directly to main copolymer chain; A2 contains suspended group, containing 5,5-dialkylhydantoin group, aminosulphonamide group or hydroxygroup; A3 contains alkyl or aryl suspended group, aryl is eventually substituted alkyl; and A4 contains suspended group, containing group of carboxylic acid. Formula 
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EFFECT: provision of high rate of laser image formation, high resolution image, wide processing possibilities, stable storage term, good resistance to impact of chemical substances and long run on printing machine.
10 cl, 21 ex, 1 tbl
