SU1214695A1 - Radiation-hardened composition - Google Patents

Description

i

The invention relates to composites based on epoxy acrylic resins that are curable under the action of ionizing radiation, and can be used to produce coatings, as well as sealants, compounds, adhesives and bonding D / 1H plastics.

The purpose of the invention to improve the technological properties of the composition

The modified (meth) acrylic acid diglycidyl ester of oligapichlorohydrin, industrial grade EAS-6551.13-, is a product of the etherification of aliphatic SMO.PY and acrylic acid and in the presence of a UP-606/2 catalyst at 80-90 s to obtain an epoxy oligomer no more than 2%.

Getting epoxyacrylate olimer,

PRI-MER 1 about

Diglididyl ether of oligoepi chlorohydrin, maCo%;

up-655 (epoxy

number 25,, 2

.AzhriloBan acid9,5

Hydroquinone, i

311-606 / 2 (2.4 j6

three sodime tilamino

Feko) Oh, 1

Example 2

UE - 655 (epoxy

number 25.0) 68.8

Methacrylic acid

Hydroquinone0.05

UP-606 / 20,15

PRI me R 3 about

 (epoxy

number 23,, 4

Acrylic acid 26.4

Hydroquinone0.03

UE 606 / 20.15

The epoxy trichloroacetate oligomer (ETHAS-8) is a product of the esterification reaction of an industrial grade ED-8 epoxy diane resin and trichloroacetic acid at a molar ratio of ()), respectively.

Preparation of epoxytrichlorouxus oligomer.

Example 4c Into a reactor with a stirrer, a reflux condenser, and a thermometer, 16.34 g (o, 10 mol) of trichloroacetic acid (THUK) are charged, heated

0

five

up to 50 ° C, 93.56 g (65.94 wt.% or 0.1 mol :) of ED-8 epoxy diane resin (epoxy number 9.0) are added to the melt of THU at such a rate

so that the temperature of the reaction mass is not 80 ° C. The duration of the synthesis is 3 hours; the residual acid number is 6 mg KOH / G.

Example 5. According to the technology presented in Example 1, 26.14 g (.0.16 mol) of TCA was loaded, 95.56 g (64.69 wt.% Or O, 1 mol) of ED-8 was added. The synthesis time is 3 hours and 40 minutes; the acid number is 8 mg KOH / g.

Example 6. A load of 32.68 g (0.2 mol) of TCA was added, 95.56 g (63.49 wt.% Or 0.1 mol) of ED-8 was added. ;. The duration of the synthesis is 5 hours. The acid number is 14 mg KOH / g.

Epoxy-acrylate o, digram of ELS-655 under the action of ionizing radiation is structured to form a three-dimensional network. ETHAS-8 is also cured in air by accelerated electrons. However, in both cases, coatings with low strength properties are obtained (see Table 1). The combination of the composition of the EAS-655 and ET25AS-8 at the same time leads to the formation during structuring in air under the action of ionizing radiation

5 elastic, durable and hard coatings. In this case, small doses of radiation of 50-100 kGy are required.

Compositions are prepared by mixing, at room temperature, (meth) acrylic oligoepichlorohydrin oligoepichlorohydrin diglycidyl ester prepared according to Example 3, and ethithitrichloroacetate oligomer ETHAS-8 prepared according to Example 4, the resulting composition

5 is applied to the surface of a metal (steel), cured under the action of accelerated electrons in air with an absorbed dose of radiation, 0 kGy. The thickness of the coatings obtained is 75-100 µm.

By mixing the EAS-655 oligomers according to examples 1 and 2 and ETHAS-8 according to examples 2 and 3, a composition is obtained. 1 di, which, when cured, give a coating similar to coatings based on the compositions of examples

In tab. Figure 2 shows the compositions and properties of the proposed compositions cured under the action of accelerated electrons with a radiation dose of 80 kGy and a coating thickness of 80 microns.

In tab. 3 and 4 show the results of the comparative properties of known compositions according to the invention, test examples. As follows from the above data, the known compositions are cured with accelerated electrons in an inert gas atmosphere, and then additional heat treatment is carried out to confirm and increase the hardness: 35 minutes at 80 ° C for composition 43 and 100 ° C for 40 minutes for composition 33. Attempts to cure these compositions in air did not give positive results (the content of gel fraction 60% and the low physicomechanical properties of the coatings).

Physical and mechanical properties of the composition according to the invention; Water absorption; for 1 month,%

Tangent of dielectric loss angle 0, 015-0,025

EAS-655-100 "8075-1004,4

ETHAS-8-1008075-1001,0

EAS-655-75

ETHAS-8-258075-1005,0

Dielectric permeability Specific volume electrical resistance, Ohm "cm

Specific surface nostatic electrical resistance Ohm “s

3.8-4.0

0.9-1.0

2.0-4.0

Thus, the use of a radiation curing composition as epoxy acrylate oligomer-modified (meth) - acrylic acid diglycidyl ester oligoepihlorgidrina, and, as the product modifier reacting epoksidianovoy resin, and trichloroacetic acid results in a composition with a high viability (at least 6 months, capable cured in the air with accelerated electrons with small doses of radiation and not requiring prolonged heat treatment.

Table j

 TP1-3 - triethylene glycol dimethacrylate, -, - methacrylate- (bis triethylene glycol) -phapatate,

Table 2

Table 3

0.70

95

40.4089

20,5493

0.32

91

0.67

96

50

45

50 kGy + „Iirt-25 40 3,0-4,0 I 35 ny 80 ° Sgaa

220 kGy Invrt-200 40 min; accepted 100 ° C. Gas

ED-20 DEPA DEAEMA

Composition GZ UP-612D5

3

2

306-400 kGy + Air 2 hours at 100-150RS

Acrylic

composition C 2 According to the invention

N OTE: MAED-30 - EPOXIDICAL oligomer, modified

metacripic acid;

EF-20 epoxy resin; DMAEMA-diethylaminoethyl methacrylate; . Pepa-polyethylenepolyamy; .

UE-612-diepoxide hexagadao; t-X., “-d etaksr1 - (, 1,3) - (bis-glyce. and) -2-fta at ;;

VNIIGSH Order 854/36. Circulation 471 Subscription

Branch PPP patent, Uzhgorod, st. Design, And

Table 4

1-2

160

85 3d h

70

60 Less days

50

Claims (1)

RADIATION-CURING COMPOSITION, comprising an epoxy acrylic oligomer and a modifier, characterized in that, in order to improve the technological properties of the composition, it contains an (ol) acrylic acid modified oligooepichlorohydrin diglycidyl ether as an epoxy acrylic oligomer and an epoxy acrylic resin interaction product, and an epoxy acrylate as an interaction product of the modifier trichloroacetic acid with a molar ratio of 1: (1-2), with the following ratio of components, wt.%: Q <о Modified (meth) - - acrylic acid diglycidyl ether oligoepichlorohydrin 65-95 The product of the interaction of epoxidian resin and trichloroacetic acid 5–35