Radiation-sensitive composition and recording material based on compounds which can be split by acid
AssigneeHoechst Aktiengesellschaft
InventorsArnold Schneller, Walter Herwig, Kurt Erbes
Life of this patent
Estimating the term…
Abstract
A radiation-sensitive composition is disclosed which comprises: (a) a polymeric binder comprised of an alkenyl phenol monomer; (b) a compound which forms a strong acid under the action of actinic radiation; and (c) a compound which contains at least one acid-cleavable C-O-C bond and has a solubility in a liquid developer which is increased by the action of acid. The composition yields positive-working recording layers which are more flexible than layers comprising known novolak binders.
Claims9
A radiation-sensitive composition which comprises:
- (a) from about 30 to 90% by weight of a polymeric binder which is insoluble in water and soluble in aqueous-alkaline solutions;
- (b) from about 0.1 to 10% by weight of a compound which forms a strong acid under the action of actinic radiation;
- and
- (c) from about 5 to 70% by weight of a compound containing at least one acid-cleavable C--O--C bond and having a solubility in a liquid developer which is increased by the action of acid, said polymeric binder comprising a copolymer comprised of (i) 40 to 90 mol-% of alkenyl phenol units represented by the formula ##STR3## wherein R denotes a hydrogen atom, a cyanide group, and alkyl group or a phenyl group,
- R.sup.1 denotes a hydrogen atom, a halogen atom, a cyanide group or an alkyl group,
- R.sup.2, R.sup.3 and R.sup.4 each separately denotes a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, and
- X stands for an integer from 1 to 3,
- and (ii) from 10 to 60 mol-% of units of alkyl acrylate or alkyl methacrylate.
A radiation-sensitive composition which comprises a support and a recording layer applied to said support, said recording layer comprising:
- (a) from about 30 to 90% by weight of a polymeric binder which is insoluble in water and soluble in aqueous-alkaline solutions;
- (b) from about 0.1 to 10% by weight of a compound which forms a strong acid under the action of actinic radiation;
- and
- (c) from about 5 to 70% by weight of a compound containing at least one acid-cleavable C--O--C bond and having a solubility in a liquid developer which is increased by the action of acid, said polymeric binder comprising a copolymer comprised of (i) 40 to 90 mol-% of alkenyl phenol units represented by the formula ##STR5## wherein R denotes a hydrogen atom, a cyanide group, an alkyl group or a phenyl group,
- R.sup.1 denotes a hydrogen atom, a halogen atom, a cyanide group or an alkyl group,
- R.sup.2, R.sup.3 and R.sup.4 each separately denote a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, and
- X stands for an integer from 1 to 3,
- and (ii) from 10 to 60 mol-% of units of alkyl acrylate or alkyl methacrylate.
Dependencies are inferred from the claim text.