SU956316A1 - Composition for manufacturing printing plates - Google Patents

Description

(54) COMPOSITION FOR THE MANUFACTURE OF PRINTED FORMS

one

The invention relates to compositions for the manufacture of printing forms and can be used in the printing and radio industry, for example, in the manufacture of printing forms of high, type-offset, offset, screen printing.

Known liquid photopoperimetic composition For the manufacture of printing plates, consisting of opigoethyacryl-j. ta-methacry L- (bis-these Leng pikel) -ph pathe as a photopolymerisation of an omponent, a monomer metimetmetakripata and a benzoin photosensitizer (lj.

Closest to the proposed com, j position, containing as oligomer dimethacryl (bis-diethylene chloride) -phthalate- as a photopolymerization compound. as a photoinitiator is benzoin methyl ester and monomer triethylenediamine col dimethacrylate 21.

The photosensitivity of these compositions is not sufficiently high, and the forms according to which they are choused from them, possess the necessary strength properties.

The purpose of the invention is. increase the sensitivity of the composition and mechanical strength of printing forms.

This goal is achieved by the fact that a composition containing oligomer dimethacryl- (bis-diethylene glycol) -phthalate, monomer-triethylene glycol-dimerCrylate and photoinitiator-methyl ester of benzoin, according to the invention, additionally contains diane epoxy resin containing epoxy groups 19, curing agent -is-methyl lithium trap left anhydride and curing accelerator tris- (dimethylaminomethyl) phenol in the following ratio of components, wt.%:

oi .CO-Dimethacropyl- (bis-diethylglycol glycol and lat.43,60-84,51

Tr C Tileng Licol Dimethacrivat10, 00-20.00

Methyl ester

Benzoin 0.50-1.50 Dianova Epoxy Resin 2.69-18.80 Isomethyl tetrahydrophthalic anhydride 2.25-15.75 2,4,6-tris- (dimethyl amine type) -phen op0.05-0.35 The invention is hypothesized by the following examples. Example. A composition of the following composition is made, May. %: (H 1 W-Dimrtakrip- (bic-diethyleneglycol) - phthalate 84,51., Triethypenglycol di-, mstrikripat 10.00 Methyl ester of benzion 0.50 Diadium epoxy resin ED-2O2,69 11 zomatter hydrogen trap dehydrogenol epoxy resin ED-2O2,69 11 zomatter ethe hydrogen sulfide epoxy resin ED-2O2,69 11 zomatrite; anhydride2,25 2,4,6 -tris- (dimeti-laminomethyl) -phenolO, O5 After careful relocation to position for 30 minutes and de-aeration (30 minutes), it is poured into the cavity to form a rugged copying device consisting of Two glasses, Negative, thickness and flow limiter of the composition are attached to one of them. Then a continuous copying is made. devices on both sides of the base for forming the basis of the printing elements with LUF-8O fluorescent lamps at a distance of 50 mm Exposure time of the photopolymerizable composition from the negative side 7.8 min, from the base - 1.3 min

1.8

7.8 6.0 1.0 7.0 1.5

o8, 0

2.0

As can be seen from the above data, print forms based on the proposed photopolymer composition in two or three times

5O 130

30 40 120

96

50

Claims (2)

for stronger prototype and faster to reduce the exposure time. The apopimerized composition will be removed, the frame will be dismantled, and the problems of the foolimer printing plates should be cleared with a rto-acetone solution. My treatment is carried out for 3 hours. Example 2. A commission of the following composition is made, May. %: about, 00-Dimetacropyl- (Bis-diethylethylene glycol) -phthalate 69, OZ Triethylene glycol dimethacrylate; Tris- {dimethylaminomethyl) -phenol0.15 Then everything is as in Example 1. Example 3. A composition of the following composition is made, May. %: about, (JO-dimetacripip- (BIS diethylengpicopic) -phthalate 43,60 Triethypengpicoldimethacrylate20, 00 Methyl ester of benzoin1, 50 Dianova epoxy resin ED-20 18,8O Isomethyltetrahydrophthalic anhydride-15,55,55,55,55,55,55,55,55,55,55,55,55,55 Iso-methyltetrahydrophthalic anhydride 15,5-epoxy resin dimethylaminomethyl) -phenop0.38 Da; 1, as in Example 1. The test results for the proposed well-known photopolymerizable comitium are shown in the table. 59 Claims of the Invention Composition for the manufacture of printing forms containing opigomer sb. , B1-Dimethacry p- (bis-di-tyi peig picopi) -fapapat, MOKCHviep - triethypengpikopi-dimethacrylate and photo-initiator-benzine methinate ester, characterized in that, in order to increase the photosensitivity of the composition and the mechanical strength of the printing forms, it should be attached to the same token to addopen in the same way to increase the photosensitivity of the composition and the mechanical strength of the printing forms, it should be attached to the same. epoxy resin with an epoxy group content of 19.9-22.0%; hardener — isometry tetrahydrophtapic anhydride and a hardening accelerator — 2,4,6 -tris- (dimetypaminomethyl) -phenol at the following ratio of components, wt.%: wasps, (JO Dimetacryp-6cdiethylengpicopic) -phthalate-phthalate43,60- 84.51 Triethylenediamine 10, 00-20.00 dimethacrylate Methyl ether 0.50-1.50 benzoin Dianova epoxy 2.69-18.80 Isometyl tetrahydride2, 25-15.75 roftal anhydride 2,4,6-tris- ( dimeti paminemethyl) -phenop 0, O5-O, 35 Sources of information taken into account during the examination 1. Author's certificate CXX) R 440951, cl. Q 03 F 7 / 1O, 1974. 2. Author's "certificate of the USSR 255773, cl. q 03 C 1/68, 1969 ootype).