SU737430A1 - Glue composition - Google Patents

Description

The invention relates to the field of cold-curing adhesive epoxy compositions for operation at cryogenic temperatures. The known polymer adhesive composition (adhesive L-4), which includes epoxy resin and polyethylene polyamine hardener amine 1. A disadvantage of the known composition is the low strength of adhesive joints, in particular, aluminum alloys BOB at cryogenic temperatures. The purpose of the invention is to increase the strength of adhesive joints of aluminum, alloys at cryogenic temperatures. This goal is achieved in that the composition comprising an epoxy resin and an amine hardener contains, as an amine hardener, S – 2-1 ercapto- or M -2-Oxypropylase, a substituted polyethylene polyamine of general formula H2 N — CH 2 —CH — t 4-GH CH —CH — CH 2 -0 - (where, SH ;. and ITS, with the following ratio of components, parts by weight: Epoxy resin 1OO Hardener / 60-127 Industrial epoxy resins with molecular weights from 20O to 60O) are used as epoxy oligomers to be approved under the conditions of room temperature: ED-20, ED-16, UP-610. As J -2-m prikapto (oksi) prospiromeshchencheny polyetherpolyamines glue composition contains products.

PSU by hydrolysis in air of the corresponding ketimine:

Z-butoxy-2-mercaptopropyl) - substituted triethylenetetraamine;

(3-6utoxy-2-hydroxypropyl) - substituted triethylenetetraamine;

{3-phenoxy - 2-4ercaptopropyl) -substituted trIfilentetraamine;

(3-h}) enoxy-2-hydroxypropyl) -substituted triethylene tetraamine;

(3-butoxy - 2-lercaptopropyl) - substituted diethylenetriamine;

(3-phenoxy-2-m8rcaptopropyl) -substituted diethylenetriamine.

The adhesive composition is prepared by mixing components taken in equimolar amounts based on the active hydrogen atoms of the amino groups at room temperature. Cooked

glue is applied in one layer on the adhered

 / -

surfaces that then combine

and. maintain under pressure of 0.1-3 kg / cm at room temperature

737430

three days. In this case, an aluminum alloy substrate was used that was not pretreated by physical and chemical methods. The adhesive composition is able to react under water. Tests for kpeev strength; from compounds with a uniform separation, samples were carried out with the type of fungi (GOST 14760-69) on a rupture mask of type 2D 10/90 at room (+ 2 ° C) and cryogenic () temperatures. Compositions based on a range of epoxy resins were tested.

Composition 1, mac.: Dianova epoxy

ED-20100 resin

Hardener N- (3-6yroxy-2-mercapropropyl) -substituted diethylenetriamine85

In tab. Figure 1 gives a comparative description of the adhesive composition 1 and the Original based on epoxy oligomer and the known diethylenetriamine (DETA). Table 1

Strength with uniform separation:

Strength with uniform oTpbJlBie after aging at

 5h

Impact viscosity according to Dynstat

Cycle resistance when changing temperatures from -196 to +100 С

Durability of prc uniform separation after exposure to 5 cycles of temperature change from - / -19BC to + 10 ° C

kg / cm 410100

-19bs

510150

+ 2os

59

530

kg / cm

kg / cm / cm 18.5

2.1

eight

50,

+ 20 ° С

20

430

Claims (1)

kg / cm .. 5 Table 1 indicates the clear advantages of the resulting composition compared to the original. Composition 2, parts by weight: Epoxy opigomer ED-2O 1OO Hardener N - (3-butoxy-2-mercaptopropyl) -substituted triethylene tetraamine 80 Composition 3, parts by weight: Epoxy oligomer ED-2O. 100 N-Hardener - (3-butoxy-2-hydroxypropyl) -substituted triethylentetraamine.80. Composition 4, parts by weight:. Dianova epoxy resin ED-16100 Hardener (as described in example. 2) 60 Composition 5, parts by weight: Epoxy resin RES-3100 Hardener (as described in example 2) 100 Composition 6, parts by weight: Epoxy resin UPB- 101OO Hardener (similar to that described in Example 2) 127 Composition 7, parts by weight: Epoxy resin ED-2010O Hardener N - (ZZ) enoxi-2-mercaptopropyl). You- (valuable triethylene tetraamine 80. Composition 8, parts by weight .: Epoxy oligomer ED-2O iOO Hardener (as described in example 2) 80 Filler aluminum oxide 150 Coefficient linear The expansion of such a composition is equal to 22.10 degrees. Table 2 shows the strength characteristics of adhesive compounds of aluminum alloy in comparison with those for industrial cold-setting adhesives: amino-epoxy adhesive L-4 (prototype) and VK-9 adhesive T a b, l and c a 2 Strength with equal glue sticking with a temperature separation round, C 1 on the basis of 510 ED-20 2 on the basis of 590 610 650 ED-2O 0 Continued table. 2 Adhesive Compatibility with uniformization of the nominal separation at Tempe paType, ° С -60 -196 3 based on ED-20 4 based on ED-16 5 based on RES-3 6 based on UE 61O 7 based on 623 750 ED-2O 600 700 8 nap: determined Known adhesives: glue L-4; (about 1 toyp) 200 Glue VK-9204 As can be seen from the table. 1 and 2, the resulting composition makes it possible to increase the strength with an even tear of adhesive joints of an aluminum alloy 3 times at room temperature and 4-7 times at cryogenic temperatures compared to cold-cured epoxy adhesives, which are widely used in industry. Claims of the Adhesive Composition comprising an epoxy resin and an amine hardener, characterized in that, in order to increase the strength of adhesive joints of aluminum alloys at cryogenic temperatures, as the amine hardening composition contains K-2-mercapto- or N-2-Oxypropyl substituted polyethylene common formup -C: "2 M a 2 and a sy-sn-cm-o-y . f--. . . . - V .at where X is OH, SH; ; .. Information sources, Y - -SlNr, -jQ. N; taken into account in the examination. in the following ratio of components, 1. D. A. Kardashov. Epoxy adhesives. Epoxy resin 100M., Himi, 1973, pp. 78, 82-83 Hardener 60-127 (prototype).