SU722422A1 - Photopolymerizing composition - Google Patents

Abstract

A PHOTO-POLYMERIZED COMPOSITION for the manufacture of embossed products, including o-^ methacryl [di (distiene glycol) -phthalate] and photoinitiator, characterized in that. in order to increase the height of the relief, as a photoinitiator, it contains benzoin methyl ester and, in addition, oligocarbonate methacrylate of levoglucosan, the general formula [| ^ С_ QН OR OR = Р -0-СН-СН, ОS-0-II. ^ 2 || ^? ^ -CH2-CH2-OC (X) C = CHgjX = H, or CH3, with the following ratio between components, parts by weight: sr ^ -Metacryldi- [(diethylene-glycol) -phthalate] Oligocarbonate methacrylate of levoglucosane methyl benzoin ester 50- 9010-50. The invention relates to photopolymerizable compositions that are used for the manufacture of embossed products — models of injection molds and cliches in electroforming. The known photopolymerization composition for the manufacture of embossed products, including “- ^ -methacrylide- [(dithylene glycol) -phthalate], methyl methacrylate, photoinitiator - benzoin and the solvent is trichloroethyl phosphate. The disadvantage of this composition is that the relief products made from it have an unsatisfactory low relief height, which makes MX difficult to use high and intaglio printing, moldings, sculptural images and ornaments in the form of bas-reliefs and high reliefs as printing forms The object of the invention is to increase the height of the relief.

Description

The goal is achieved by the fact that photopolymerizable with a composition comprising (X-ft-methacryldi- (diethylene glycol) -phthalate and photoinitiator, contains benzoin methyl ester and additionally oligocarbonate methacrylate of levoglucosane of the general formula as photoinitiator

H-o

-Q

n

n

H

OR

N.

RO

H OR

where R-C-O-CbL-CH.OC-O0

ABOUT

ABOUT

-CI2-CH,; - OS (L)

X n. or CHS, in the following ratio of components, wt.h:

aP-Metacryldi- (diethylene glycol) -phthalag 50-90

Oligocarbonate methacrylate

levoglucosan. 10-50

Benzoin methyl ester 0.5-1.0

Embossed patterns are produced as follows.

The components of the composition are thoroughly mixed and, after removing the bubbles, they are poured into the cavity of the forming-copying frame with two glasses, on the inside of o, the negative of which is attached, and the other is made of plexiglass plate, to stiffen the future model. rubber compositions are placed between the glasses, and metal stops determine the thickness of the future model for electroforming (2-4 mm). The composition is irradiated with fluorescent lamps of the LUF-80 type with UV light from a distance of 50-100 cm for 5-20 minutes from the negative side (relief formation) and within 1-5 minutes from the opposite side (base formation).

The unpolymerized liquid portion of the composition is removed by washing with a mixture of acetone and ethyl alcohol (1: 1).

PRI me R 1. In a porcelain cup placed 90 wt.h. Cr / -Metacryldi- (diethylene glycol) -phthalag (oligoether acrylate MDF-2). 10 wt.h. oligocarbonate methacrylate levoglucosane, where X H, 1 wt.h. methyl benzoin ether and stirred for 1.5 h at room temperature. After degassing, the mixture is poured into the cavity of the forming-copying frame and irradiated with fluorescent lamps with UV light of the type LUF-80 with a distance of 100 mm. The exposure time is 5 minutes. The unpolymerized part of the composition is removed by washing with a mixture of acetone and ethyl alcohol (1: 1).

The height of the mold injection mold is 1.45 mm,

example 2. In a porcelain cup

placed 70 wt.h. oligoether acrylate MDF-2, 30 May, h, oligocarbonate methacrylate of levoglucosane, where X is CH 3, and 1.0 wt.h, benzoin methyl ester and the operations of example 1 are performed. Exposure time

5 minutes,

The height of the mold injection mold is 1.9 mm,

Example 3. In a porcelain cup

placed 50 wt.h. oligoacrylate

MDF-2, 50 wt.h, oligocarb (enate methacrylate of levoglucosane, where XH, and 1.0 May, h, methyl benzoin ether and carry out the operations of Example 1.

The height of the mold injection mold is 2.3 mm. Example 4, In a porcelain cup

placed 90 wt.h. oligoether acrylate MDF-2, 10 wt.h, oligocarbonate methacrylate levoglucosane and 0.5 wt.h. methyl ester of benzoin and conduct operations according to example 1. The exposure time is 5 minutes.

The height of the mold injection mold is 2.1 mm.

Example 5, In a porcelain cup

placed 70 wt.h. oligoacrylate

MDF-2, 30 wt.h. oligocarbonate methacrylate levoglucosane and 0.75 wt.h, methyl

benzoin ether and the operations of example 1 are carried out. The height of the injection mold relief is 1.80 mm.

Example B. In a porcelain cup

placed 50 wt: h oligoether acrylate MDF-2, 5 wt.h. oligocarbonate of levoglucosane, 1 May, h. methyl benzoin ether and the operations of Example 1 are carried out,

The height of the mold injection mold is 2.25

mm

The height of the relief of the mold made from the composition of the prototype at the same exposure time is

1.15mm

Thus, the main technical advantage of the proposed composition is the possibility of obtaining printing plates, injection molds and cliches with increased relief height. Such a composition makes it possible to obtain printing plates for high-speed and intaglio printing, to replace zincography with a simpler method of making cliches. Greater terrain height and

5722422b

high roughness class allow the basis of the proposed composition have

use the proposed composition 9-10 class surface roughness

also for the manufacture of molded products, relief, well silver and possess his sculptural images and ornaments in the vmic resistance to electrolytes in the galvid bas-reliefs and high reliefs. Products on 5 vanoplastic baths.

Claims (1)

PHOTOPOLYMERIZING COMPOSITION for the manufacture of embossed products, including α-β-methacryl (di (diethylene glycol) phthalate] and photoinitiator, characterized in that. In order to increase the height of the relief, it contains benzoin methyl ester and additionally oligocar