公开(公告)号：DE2759163A1

公开(公告)日：1979-07-12

申请号：DE2759163

申请日：1977-12-31

Applicant: BASF AG

Inventor： BRONSTERT BERND DIPL CHEM DR ,  KUESTERS WERNER DIPL CHEM DR ,  JUN MONG-JON DIPL CHEM DR ,  WALLBILLICH GUENTER DIPL CHEM

IPC: C08F2/48 ,  G03F7/031 ,  G03F7/10

Abstract: The compsns. contain (a) >=1 cpd. of low mol. wt. and contg. >=1 unsatd. photopolymerisable double bond; (b) >=1 compatible organic polymeric binder; (c) a photo-initiator; and (d) 0.001-0.1 wt. % of an etherified thioanthraquinone cpd. of formula (I):- in which R is 1-12C alkyl, 1-8C alkyl substd. by an opt. etherified and/or esterified OH gp. and/or an alkoxycarbonyl gp., or an opt. substd. phenyl gp. Pref. cpds. (I) are propyl-, n-butyl-, and isobutylthioanthraquinones, and esp. 2-butylthio-2-anthraquinone (II). Presence of the (I) in known photopolymerisable compsns. reduces undesired polymerisation of the compsn. in the shadow of fine opaque image elements during exposure in contact with a negative, thus giving improved image clarity. The presence of the (I) does not reduce the light sensitivity or exposure latitude of the material.

公开(公告)号：DE2722421A1

公开(公告)日：1978-11-23

申请号：DE2722421

申请日：1977-05-18

Applicant: BASF AG

Inventor： BRONSTERT BERND DIPL CHEM DR ,  KUESTERS WERNER DIPL CHEM DR ,  JUN MONG-JON DIPL CHEM DR ,  WALLBILLICH GUENTER DIPL CHEM

IPC: G03F7/031 ,  G03F7/10 ,  C08L77/00

Abstract: The compsn. is based on a mixt. of low-mol. (poly)olefinic cpd(s). (I) and compatible organic polymeric binder(s) (II) contg. a photoinitiator. The novelty is that the compsn. contains 0.001-0.1 wt. % homogeneously dispersed 1-12C-alkyl-thio-anthraquinone (III) and pref. also 0.01-1 wt. % of an organic tert. amine (IV) or an aromatic alpha-ketocarboxylic acid (V) or its 1-18 C-alkyl ester or 0.02-2 wt. % of an organic N-nitrosohydroxylamine salt (VI). The relief structure is improved by reducing undesired polymerisable in the complete shadow of fine opaque image elements, with simultaneous favourable exposure latitude and without impairing the speed.

公开(公告)号：DE2720559A1

公开(公告)日：1978-11-09

申请号：DE2720559

申请日：1977-05-07

Applicant: BASF AG

Inventor： HOFFMANN GERHARD DIPL CHEM DR ,  KUESTERS WERNER DIPL CHEM DR

IPC: G03C1/00 ,  C08F2/00 ,  C08F2/50 ,  G03F7/004 ,  G03F7/027 ,  G03F7/038 ,  C08F220/18 ,  G03C1/68 ,  G03F1/02

公开(公告)号：DE2616588A1

公开(公告)日：1977-11-03

申请号：DE2616588

申请日：1976-04-14

Applicant: BASF AG

Inventor： KUESTERS WERNER DIPL CHEM DR ,  THIL LUCIEN DIPL CHEM DR

IPC: C07C45/71 ,  C08F299/04 ,  G03F7/031 ,  C07C43/30 ,  C07C41/04

Abstract: Prodn. of symmetrical monoacetals (I) of aromatic 1,2-diketones (II) of formulae A'-CO-C(OR')2-A" (I) and (A'-CO-CO-A" (II) (in which A' and A" are opt. substd. aromatic gps. and R' is opt. substd. hydrocarbyl gp) involves reacting (II) with an alkylating agent of formula (R')nX and a corresponding alcoholate of the formula (R'O)mMe (in which n and m are 1, 2 or 3; X is a mono- to tri-basic acid gp. and Me is a main gp. I-III metal) in an organic solvent. (I) are used as photoinitiators for the polymerisation of unsatd. monomers or their mixts. with unsatd. polymers. The process is simple and economical and gives high yields. In an example benzil dimethyl acetal was prepd. from benzil, dimethyl sulphate and NaOMe in dioxane.