Hoechst Aktiengesellschaft

Jurgen Sander

Gerhard Buhr

Hans Ruckert

Klaus Horn

Reinhard Handte

Detlef H Skaletz

Gerhard Lohaus

Thomas Tammer

Preparation of 5- and 6-halo-2-mercaptobenzoxazoles or the sodium and potassium salts thereof by reaction of corresponding 4- or 5-halo-2-aminophenols with sodium or potassium lower alkyl xanthates in heterogeneous phase.

Process for the preparation of halo-2-mercaptobenzoxazoles

This invention relates to an improvement in a photopolymerizable mixture which contains, as the essential constituents, (a) a polymeric binder, (b) a photoinitiator, and (c) a polyester of an .alpha.,.alpha.'-bis-methylene-dicarboxylic acid and a dihydroxy compound.

Photopolymerizable unsaturated polyesters and copying material prepared

This invention relates to an improvement in a mixture which is polymerizable by radiation and contains, as the essential constituents, (a) a polymeric binder, (b) a polymerization initiator which can be activated by radiation, and (c) a compound of the formula I ##STR1## in which R.sub.1 is a divalent aliphatic group having 1 to 15 carbon atoms which also can be partially replaced by hetero-atoms, a divalent cycloaliphatic group having 3 to 15 carbon atoms, or a mixed aliphatic-aromatic group having 7 to 15 carbon atoms, and A is an electron-attracting radical. The invention also relates to a radiation-sensitive resist material using the improved radiation-polymerizable mixture.

Mixture which is polymerizable by radiation, and radiation-sensitive

This invention relates to an improvement in a radiation-sensitive mixture containing (a) a compound which forms an acid under the influence of actinic radiation and (b) a compound which has at least one acid-cleavable bond and the solubility of which in a liquid developer is increased by the action of an acid, the improvement that the compound which is capable of being cleft by an acid contains at least one N-acyliminocarbonate group as the acid-cleavable group. The invention also relates to a process for producing relief images using the radiation-sensitive mixture.

Acid degradable radiation-sensitive mixture

This invention relates to an improvement in a radiation-sensitive mixture containing (a) a compound which forms an acid under the influence of actinic radiation and (b) a compound which has at least one acid-cleavable C--O--C group and the solubility of which in a liquid developer is increased by the action of an acid, the improvement that the compound which is capable of being cleft by an acid contains at least one enol ether group as the acid-cleavable group. The invention also relates to a process for producing relief images using the radiation-sensitive mixture.

This invention relates to a radiation-sensitive copying composition which comprises (a) a compound which forms an acid under the influence of actinic radiation, and (b) an organic polymeric compound which contains recurrent acetal or ketal groupings in its main chain and whose solubility in a liquid developer is increased by the action of an acid, each .alpha.-carbon atom of the alcoholic constituent of the acetal or ketal grouping of the organic polymeric compound being aliphatic. The invention also relates to a process for the production of relief images using a radiation-sensitive copying composition.

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Kelkheim, Germany

Jurgen Sander