Light-sensitive phenolic resin for resist and printing plate mfr. - contains (ortho)-quinone-diazide-sulphonic ester or amide gps.

    公开(公告)号:DE2545957A1

    公开(公告)日:1977-04-21

    申请号:DE2545957

    申请日:1975-10-14

    Applicant: BASF AG

    Abstract: Light-sensitive material for positive-working photoresists and for the prodn. of printing plates is based on a water-insol. polycondensate (I) of phenol(s) with an aldehyde and contains o-quinone-diazide-sulphonyl gps. In addn. to condensed units of phenolic cpd(s). (II), (I) also contains condensed units of phenolic cpd(s). (III) in which the OH or NH2 gps. are (partly) reacted to o-quinone-diazide-sulphonic ester or amide gps. which is strongly absorbing in the 300-400 nm wavelength range and pref. has a molar extinction coefft. epsilon >103 in that range. The material has higher sensitivity and gives faster printing plates than compsns. contg. naphthoquinone-1,2-diazide-5-sulphonic ester. It adheres well to substrates, has good film-forming properties and can be produced easily and cheaply. Pref. (I) has a mol. wt. of 1000-10000 and contains a (III) unit to every 2-15 phenolic units. In an example a light-sensitive phenolic resin was prepd. from a o-quinonediazide-sulphonic diester of 2,2',4,4'-tetrahydroxybenzophenone monoacetate, bisphenol A and HCHO.

    Light sensitive material for prepn. of printing plates - contg. polymer with (ortho)-quinone-diazide-sulphonyl side gps.

    公开(公告)号:DE2545697A1

    公开(公告)日:1977-04-21

    申请号:DE2545697

    申请日:1975-10-11

    Applicant: BASF AG

    Abstract: The material for positively acting photographic coatings is based on polymes having a -C-C- chain carrying O-quinonediazide-sulphonyl side-gps. These are introduced by means of a cpd. (I) having >2-OH and/or -NH2 gps. which absorbs strongly in the wavelength range of 300-400 nm and pref. has a molar extinction coefft. epsilon >103. (I) is partially converted to an o-quinonediazide sulphonic acid ester and/or amide by reaction of some of the -OH and/or -NH2 gps. The resulting prod. (II) still having >=1 -OH or -NH2 gp. is then combined with the reactive gps. of a polymer. The material has improved light-sensitivity and gives mechanically stable printing plates at an increased rate. In an example a light-sensitive polymer was obtd. by reacting 2,2',4,4'-tetrahydroxybenzophenone and 2,1,5-diazonaphthaquinone-sulphonyl chloride with successive addns. of NEt3, acetic anhydride, NEt3, styrene-maleic anhydride copolymer (5% in acetone) and finally more NEt3.

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