SU773565A1 - Photopolymeric plate - Google Patents

Description

one

The invention relates to photopolymer printing plates based on liquid photosensitive compositions used for high, type-fed and other types of printing.

A photopolymer printed form is known, consisting of a metal substrate, an adhesion-anti-anti-rim layer comprising a film-forming component — a polyether polyurethane-Yu. Resin, m. 40,000 containing hydroxyl polyethylene adipate, a mixture of solvents (ethyl acetate and methyl ethyl ketone) and a dye (oil-soluble yellow), and a photopolymerizable layer.

Photopolymer on the side - antraHO- Rocnooso

 ii and: -. .

oh oh

quinone or benzoin ethyl ester, or benzoin methyl ester and the inhibitor is polyethylene glycol or fl hydroquinone}.

A disadvantage of the known photopolymer printing plate is the unsatisfactory low separation and resolution ability, low gradation shape transfer and partial cracking of the adhesive layer during operation, which leads to deterioration of the adhesive strength of the printing elements.

The purpose of the invention is to increase the reproduction-graphic characteristics and adhesive strength of the photopolymer printing plate.

The goal is achieved by the fact that a photopolymer printed form consisting of a metal substrate, an adhesive anti-polyamole layer, comprising a film-forming component and a dye, and a photo-polymerizing layer, contains a 60% styrene solution and a polyethylene-polyethylene-polyethylene adhesive layer as a film-forming component.

-s-sn sk-s-oh, a) o o

where R .- (CHj) 4. R - () jO, n. 3-8 and urethane prepolymer, representing a mixture of two products taken

in the ratio of 85:15, of the general formula () and (W):

(L)

in-c-o-Gn-o-c-c-n-n „- C-in and

oh oh

W

NH-C-OCHoCH CH2,

II o

ide (SNg) 7 to -Cftl2 H2) 0, l 2-6

as a dye, it contains a 0.5% acetone solution of an orange soluble 4J dye or yellow 5K dye, or an alcohol-soluble Bordeaux C, and additionally contains a photoinitiator — benzoin or benzoin methyl ester; or benzoin isobutyl ether with the following ratio of components, parts by weight;

60% styrene

Dipolyethyleneglycolmaleate addipinate solution of general formula (I) 55-80

Urethane prepolymer 20-50

Fotrinitsator0,5-1,5

0.5% acetone

dye solution 12-20.

The photopolymerizable layer of the proposed photopolymer printing plate may include such commonly used components as a film-forming component — a fixed oligo ester crosslinking vinyl monomer, a urethane prepolymer, and a photoinitiator of a benzoin series.

Example. An adhesive composition is prepared on the basis of a saturated oligozofermaleate of general formula (i) having hydroxyl and carboxyl groups at different ends of the chain, with an acid number of 35-40 mg KOH / g and 3-8. 60% dipolyethylene glycol maleate adipate in styrene (55 parts by weight) is taken, 0.5 weight is added. photoinitiator (benzoin isobutyl ester), stirred, and 20 parts by weight added. urethane prepolymer (n 2 - b), containing 5% isocycate groups, all mixed. Prepare a 0.5% solution of orange dye 4G in acetone, which is added in an amount of 12 parts by weight. to the previously prepared mixture. Then, the prepared solution is applied on the surface of a steel plate with a thickness of 0.25 mm, previously defatted and treated with a phosphating compound. The solution is applied with a doctor blade or spunbond and hardened with UV light for 10 minutes.

Next, the liquid photosensitive resin, which is a mixture of saturated oligoester, vinyl monomer, urethane prepolymer, benzoin photoinitiator, is applied onto the substrate with an adhesive layer in the form of a uniform layer and exposed to actinic light through the film that carries the image (negative) before the image, to the image, the image bearing (negative), before the image, and the image, the image bearing (negative), before the image, is applied to the image. H (the exposed areas of the composition are removed with an aqueous-alkaline developer, followed by a pre-exposure of the printing form.

PRI mme R 2. Proceed as. In example 1, using a yellow dye 5K acetone-soluble, absorbing in the region of 370 nm, with the following ratio of components, parts by weight: 60% styrene solution of dipolyethylene glycol maleate of dipipate of the general formula (T) 69 Urethane prepolymer 30 Methyl ester of benzoin 1 0.5% acetone dye solution 15. EXAMPLE 3. Proceed as in Example 1 using Bordeaux C dye absorbing in the 440 nm region, the following ratio of components, weight .ch .:

60% styrene

dipolyethylene glycol maleate solution of the general formula (T) 80

Urethane prepolymer 50

Benzoin1,5

0.5% acetone

dye solution 20.

Claims (1)

Claim A photopolymer printing plate consisting of a metal substrate, an adhesive-anti-rheumatic layer, including a film-forming component and a dye, and a photopolymerizing layer, characterized in that, in order to increase the reproducibility and graphic characteristics and adhesive strength, the photopolymer printing plate in an adhesive-anti-rheumatic layer contains ι \ as a film-forming component, a 60% styrene solution of dipolyethylene glycol maleate adipate of the general formula (£) ho- [rocrco -в - о-с -ch = ch-c-oVh, (i) ч И н п ^{J Λ} OOO about where R = -QCH2 \, k '= - (CH ₂ - <1Н2) ₂ θ'"= 3-δ and a urethane prepolymer, representing the mixture of two products taken in the ratio 85:15, of the general formula (B) and (U): about BH-C-OCH ₂ CH = €! H ₂ ABOUT ΝΗ-С-О-Гн -о-с-в-с-к * - and and O (TP) Ndo where B = (CH ₂ ) 4, B = - (CH ₂ -CH ₂ ) _g O, P ~ 2 ~ 6 styrene dipolyethia as a dye contains a 0.5% acetone solution of the dye of orange alcohol-soluble 4G or yellow 5K, or alcohol-soluble bordeaux C and additionally contains a photoinitiator - benzoin or methyl benzoin ether or isobutyl benzoin ether in the following ratio components, parts by weight: 60% solution of lenglycolmaleinatadi • pinate of general formula (ΐ) Urethane prepolymer Photoinitiator 0.5% acetone dye solution