Reference

Photopolymers

Photopolymers. Sperry, John Arthur; Maguire, Dennis David (Autotype International Ltd., UK). Eur. Pat. Appl. EP 92901 A2 2 Nov 1983, 18 pp. DESIGNATED STATES: R: BE, CH, DE, FR, GB, IT, LI, NL, SE. (English). (European Patent Organization). CODEN: EPXXDW.Some commonly used reagents like 574-96-9 and 2032-35-1 are used in this experiment. CLASS: IC: G03F007-10; C08F008-28. APPLICATION: EP 83-301229 8 Mar 1983. PRIORITY: GB 82-11788 23 Apr 1982. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Photopolymer useful in photoimaging and resist applications is prepd. by reacting poly(vinyl alc.) with an intermediate compd. being a reaction product of (1) a compd. contg. 31 formyl or acetal group or a compd. from a reaction of an acetal and a hydroxybenzaldehyde with (2) an arom. or heterocyclic compd. carrying an acetal group. Thus, a mixt. contg. 10% poly(vinyl alc.) 20 and Na salt of 4-(2,2-diethoxy)ethoxy-4'-sulfochalcone (prepd. by reacting bromoacetaldehyde di-Et acetal with p-hydroxybenzaldehyde and condensing the obtained product with Na p-acetylbenzenesulfonate in alk. medium) 6 g was reacted at pH = 2 and at 70° for 3 h. The obtained photopolymer was pptd. with Me2CO, washed, dried, and dissolved in H2O to give a 10% soln. and coated on a polyester support. The dried coating was imagewise exposed to a 2 kW actinic light source at a distance of 75 cm for 15 s and developed with cold H2O to give an image. .