SU547713A1 - Composition to obtain thin copy layers - Google Patents

Description

(54) COMPOSITION FOR RECEIVING THIN COPIERS

LAYERS

one

The invention relates to the technology of making offset printing forms on photopolymerizing compositions.

A known composition for the preparation of thin copier layers, comprising cinnamoate or cellulose acetocinnamate, oligomer, solvents and benzoin butyl ester.

However, the known composition has a low photosensitivity.

A composition for the production of thin copying layers is also known, which includes hydroxypropylcellulose, octamethacrylate / tripentazritrite / diadipate, ethyl alcohol, acetone and benzoin butyl isobutyl ether.

This composition has poor printing properties (low photosensitivity and low adhesion to metal plates).

The aim of the invention is to improve the printing and technical properties of the composition to obtain thin copy layers.

The goal is achieved by the fact that the known composition for the preparation of thin copier layers further comprises an aminophenol of the general formula

OS 11

YAN-S-SI CH2,

about

where TJ is hydrogen or methyl, with the following

ratio of components, wt.%: Hydroxypropylcellulose2-3

Octamethacrylate / tripentaerythritol / diadipate2-2, 5

Aminophenol1 -7

Acetone43,1-48,5

Benzoin butyl-isobutyl ester0.3-0.5

Ethyl alcoholErest.

Claims (1)

Make photopolymer offset forms in the following way. The photosensitive composition is watered on a metal plate. after which they are dried at room temperature, and then sensitive plates are irradiated through photoforms with a battery of LUF-80 lamps at a distance of 20 cm. The irradiated plates are exposed to water, and then doped with 5% orthophosphoric acid 5. Three compositions of the present composite are given below. Composition 1, weight.h; Hydroxypropane octopus -Acryl-amino-phenophenyl acrylate1 Composition 3, parts by weight: Hydroxypropylcellulose 2 Octamethacrylate / tripenta-30 erythritol / diadipate2 Ethyl alcohol40 Adeton 48,5 Butyl-benzoin isobutyl ether Benzoin 0.5,5 N-Acryl-aminophenyl acrylate7 Use Lagged composidia improves the technology of making photopolymer printing plates: copying layers with the introduction of solid monomer become 40 drier, copying time is reduced from 10 minutes to 1-2 minutes, photographic properties of copying layers improve (contrast ratio increases from 1 - 1.2 to 3 - 4 J-cm,), the adhesion of the photopolymer layer to the metal plate (granulated aluminum) increases from 67 to 112 kg / cm, the hardness of the layer increases. The printing and technical properties of photopolymer printing plates are improved: the color perception and paint performance, the acid resistance and wear resistance of the layer are enhanced. Claims of the Invention A composition for producing thin copy layers, including hydroxypropyl cellulose, octamethacrylate / tripentazritol / diadipate, ethyl alcohol, adeton and butyl isobutyl benzoin ester, which is improved, it is necessary to have a temperature dial, which has a temperature setting that is set. -c is NH-C-CR CHa O where R is H or CH3, with the following ratio of components, wt.%: Hydroxypropyl cellulose Octamethacrylate / tripentaerythritol / diadipate 2-2.5 Aminophenol 1-7 43.1-48.5 Butyl-isobutyl benzoin ester 0.3-0, 5 Ethyl alcohol Else.