 Drain source protected MNOS transistor and method of manufacture |
| OF THE PREFERRED EMBODIMENT A partial sectional view of a conventional drain source protected MNOS ... |
|
| CMOS integrated devices in seeded islands |
| The low power consumption of integrated circuits fabricated in CMOS has made such structures the ... |
|
| Junction-type field-effect transistor and its manufacture |
| What is claimed is: 1. A junction field effect transistor which comprises a semiconductor body ... |
|
| Analgesic mixture of nalbuphine and ibuprofen |
| OF THE INVENTION Nalbuphine, which has the chemical name (-)-17-(cyclobutylmethyl)-4,5.alpha.-... |
|
| Phthalidyl apovincaminate with cerebral eubolic activity |
| I claim: 1. The compound, 13a-ethyl-2,3,5,6,13a,13b-hexahydro-1H-indolo(3,2,1-de)pyrido(3,2,1-ij)(1,... |
|
| Method of pharmacologically treating drug addiction with alpha-methyl-para-tyrosine |
| What is claimed is: 1. A method of preventing alpha-methyl-para-tyrosine crystalluria in a human ... |
|
| Treatment of the acute after-effects resulting from alcohol ingestion |
| I claim: 1. A method for treating the acute after-effects of alcohol ingestion which comprises ... |
|
| Method of treating abstinence syndrome with cycloaklyltriazoles |
| What is claimed is: 1. A method of treating symptons of nicotine abstinence syndrome comprising, ... |
|
| Treatment of neurotransmitter-linked drug abuse |
| OF THE INVENTION The Biel patent describes numerous phenylalkylhydrazines, their preparation, and ... |
|
| Method of treating cognitive and related neural behavioral problems |
| OF THE INVENTION The novel compounds of the invention are in general obtainable as white, yellow ... |
|
|
Light-sensitive mixture and copying material prepared therefrom, and process for the preparation of a printing form from the copying material
| Details |
Inventors: Stahlhofen, Paul;
Assignee: Hoechst Aktiengesellschaft (Frankfurt am Main, DE)
Primary Examiner: Brown; J. Travis
Assistant Examiner:
Attorney, Agent or Firm: Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Koch
A light-sensitive mixture is disclosed which contains a water-insoluble, aqueous-alkali-soluble binder, a light-sensitive o- or p-quinone-diazide or a mixture of (a) a compound which generates or splits off an acid on exposure to light and (b) a compound having at least one C--O--C group which can be cleaved by acid, and a phenol compound having 1 to 3 benzene nuclei which are mutually linked by single bonds, carbonyl groups, ether groups, thioether groups or optionally substituted methylene groups, and having at least one phenolic hydroxyl group and at least two substituents of the formula --CH.sub.2 OR, in which R is hydrogen or a lower alkyl or acyl group. The mixture is used for the preparation of light-sensitive copying material, preferably for the preparation of planographic printing forms. The addition of the phenolic compound has the effect that the developed printing forms can be baked at lower temperatures than hitherto in order to extend the printing run. |
|
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS The invention begins with a light-sensitive mixture containing a water-insoluble binder, which is soluble in aqueous-alkaline solutions, a light-sensitive o- or p-quinone-diazide or a mixture of (a) a compound which generates or splits off an acid on exposure to light and (b) a compound having at least one C--O--C group which can be cleaved by acid, and a phenol derivative.
In the mixture according to the invention, the phenol derivative is a compound having 1 to 3 benzene nuclei which are mutually linked by single bonds, carbonyl groups, ether groups, thioether groups or optionally substituted methylene groups, and having at least one phenolic hydroxyl group and at least two substituents of the formula --CH.
sub.
2 OR, in which R is a hydrogen atom, or a lower alkyl or acyl group.
Furthermore, according to the inventon, a light-sensitive copying material is provided which is composed of a support and a light-sensitive layer constituted by the mixture defined above.
Moreover, according to the invention, a process for the preparation of a printing form is provided, wherein a light-sensitive copying material composed of a support and a light-sensitive layer containing a water-insoluble binder, which is soluble in aqueous-alkaline solutions, a light-sensitive o- or p- quinone-diazide or a mixture of (a) a compound which generates or splits off an acid on exposure to the light and (b) a compound having at least one C--O--C group which can be cleaved by acid, and a phenol derivative, is exposed imagewise, the non-image areas of the layer are washed out with an aqueous-alkaline developer solution and the material is then heated to an elevated temperature in order to harden the image layer.
This process utilizes the light-sensitive copying material defined above.
The phenol derivatives contained in the mixture according to the invention can, for example, correspond to one of the general formulae I and II ##STR1## in which R is a hydrogen atom, a lower alkyl group or a lower acyl group, R' is an alkyl, alkoxy, cycloalkyl, aryl, aryloxy, acyl or aralkyl group or a halogen atom, X is a single bond or one of the groups S, O, CO or CR
|
| Related patents |
|
|
Manufacture of a wear-resistant sliding surface
It is therefore an object of the present invention to provide a simple process for producing a sliding surface which provides a satisfactory oil-retaining capability ...
|
|
|
Image forming method for forming a multicolor image from a half-tone dot exposure
OF THE INVENTION Silver halide color photographic light-sensitive materials relating to the invention are comprised of at least three layers each having a different ...
|
|
|
Light-sensitive material containing silver halide, reducing agent and polymerizable compound with silver halide outside and inside of microcapsules
OF THE INVENTION Examples of the silver halide employable in the light-sensitive sensitive material of the present invention include silver chloride, silver bromide, ...
|
|
|
Light-sensitive material containing silver halide, reducing agent and polymerizable compound wherein the silver halide comprises monodisperse tabular grains
OF THE INVENTION In the present invention, there is no specific limitation with respect to the halogen composition of the silver halide grain. Examples of the silver ...
|
|
|
Light-sensitive copying material with o-quinone diazide and phenolic hydroxy compound
What is claimed is: 1. A light-sensitive copying material comprising (A) an anodized aluminum support and (B) a positive-working, light-sensitive copying layer ...
|
|
|
Absorptive layer for optical lithography
OF THE INVENTION The compositions of this invention are useful in forming an absorptive layer in a multilayer resist recording medium. An absorptive coating formed from ...
|
|
|
Positive dye photoresist compositions with 2,4-bis(phenylazo)resorcinol
OF THE INVENTION The present invention provides novel photoresist compositions which contain highly absorbant actinic bisazo phenolic dyes highly soluble in both ...
|
|
|
Highly-sensitive high-contrast photographic materials
OF THE INVENTION As previously indicated, R.sup.1 of general formula (I) represents a monocyclic or bicyclic aryl group. The aryl group may be substituted with one or ...
|
|
|
Positive acting photoresist comprising diazide ester, novolak resin and rosin
I claim: 1. An alkali soluble, positive working photoresist composition comprising a naphthoquinone (1,2)-diazide sulfonic acid ester photosensitizer, a novolak resin in ...
|
|
|
Silver halide photographic material comprising a polyoxyethylenic compound and a sensitizing dye
OF THE INVENTION The addition of the spectral sensitizing dye can be made during, at the beginning of, or prior to chemical ripening, or between completion of chemical ...
|
|
|
Semiconductor manufacture 
