SU711083A1 - Adhesive composition - Google Patents

Description

The invention relates to the field of the preparation of cyanoacrylate based adhesive compositions for use in the field of technology: for bonding metals, glass, plastics, rubber and other materials. Known cyanoacrylate-based adhesive composition, which contains 3-25% by weight of divinyl sulfone as an additive that improves heat resistance 1 When gluing steel specimens with a known composition containing allyl cyanoacrlude as pianoacrylate, shear strength of the adhesive joint after heating at 15 ° C for 1 h em 1 O8-133 kgf / cm. However, this composition has insufficient shear strength at 2 ° C to 139-180 kgf / cm. With the introduction of divinyl sulfone, the setting time is significantly increased, reaching 2-5 minutes. Known adhesive composition based on allyl-cyanacrylate and 3% methyl ethyl ketone peroxide 123. The composition does not provide sufficient heat resistance, the closest to the technical essence and the resulting positive effect to the proposed is alkyl-cyanoacrylate adhesive composition containing 2-cyanbutadienecarboxylic acid bis-esters general formula: CHj, - CH-CH С - С (0) (0) С-С-СН-СН CH 2 CNCN, .-), -s-ni, -, -si, t -rlkik .t , (c. in the amount of 2-2 wt.% as an additive that increases the heat resistance of 21. 37 Tensile strength at break of The composition at a temperature of 20 ° C is 24 O-300 kgf / cm. The setting time is 2-1 O s. When gluing steel samples, the MDF composition containing 95 g of ethycyanacrylate and 5 g of di (cL-cyanepent 2,4-dieneate) ethylene glycol, the strength at detachment after heating at 200 ° C for 1 is 2 kgs / cm. The disadvantage of this composition is low heat resistance at elevated temperatures. The purpose of the invention is to increase the heat resistance of the composition. This goal is achieved in that the adhesive composition comprising cyanoacrylate and bis-esters of 2-cyanbutadienecarboxylic acid of general formula W contains allyl cyanoacrylate as cyanoacrylate and additionally organic peroxide in the following ratio of components, wt.%; Allyl cyanoacrylate89-98.5 2-cyanbutadienecarboxylic acid ester 1-10 Organic peroxide0, 1-1 The combined use of allyl cyanoacrylate and 2-cyanbutadienecarboxylic acid bis esters gives a synergistic effect on heat resistance, which is confirmed by the data given in table. one. Table

1.Appshshshiyanakrilat Dtsb

peroxide rubs, butyl

2. Allyl cyanacrylate

peroxide tert.

butyl

3. Ethyl cyanoacrylate dtsb

Example. To 94.5 g of allyl cyanoacrylate, 5 g of di (c. Cyanpent-2, 4-dienate) ethylene glycol (DCB) was added with stirring at room temperature until complete dissolution and 0.5 g of tert butyl peroxide.

The resulting composition is glued

78

17

20

The steel samples were left at room temperature for 24 hours, then heated for 1 hour and their ultimate strength was determined according to GOST 476O-69 at the same temperature.

Test data are given in table. 2

1.Allylcyanoacrylate 94,

DCB5

tretbutyl peroxide0,5

2.Allylcyanacrylate 89 DCB1O

peroxide rubs

butyl1

3.Allylcyanoacrylate 98.5 DCB1

peroxide rubs

butyl0,5

4. Allyl cyanoacrylate. 84.5 DyB-4D5

peroxide rubs

butyl, 0.5 For comparison:

5.Allylcyanoacrylate 99.3 DCB0.2

tt.0,5 butyl peroxide

6.Aplcilianacrylate95 DCB5

7. Ethyl cyanoacrylate 95 DCB5 (according to the prototype)

Table 2

341

78

164

330

278

59

364

80

297

17

24O

Claims (2)

About 2O ZOO PRI me R 2, the Glue composition is prepared and ejected as in Example 1, only 8S g of allyl cyanoacrylate, 1O g of cerebrovascular disease and 1 g of tert peroxide, butyl are used. PRI me R 3. The adhesive composition is prepared and tested as in Example 1, only 98.5 allyl cyanoacrylate, 1 g of DCH and 0.5 g of tert-butyl peroxide are used. EXAMPLE 4 An adhesive composition is prepared and eluted, as in Example 1, only 84.5 g of allyl cyanoacrylate, 5 g of di (o1-cyanpenta2, 4-diyate) diethylene glycol (DCB-4D) and 0.5 g of tert-peroxide are used. butyl. Thus, the use of allyl cyanoacrylate as cyanoacrylate in compres sions containing 2 cyanbutadienecarboxylic acid bis esters and organic peroxide leads to an increase in the heat resistance of the composition at elevated temperatures. Thus, the tensile strength when an adhesive joint is heated after heating at 200 for 1 h increases to 59-164 kgf / cm. The ultimate strength of the chain is 278-364 kgf / cm. Setting time, compositions 2-10 s. The composition can be used to create parts subject to temperatures up to 2 ° C. Claims of the Invention A glue composition comprising cyacrylate and 2-cyanbutadiene-carboxylic acid bis esters of the general formula; CH2; CHCH-9C (0) 03 -R (CH2) „characterized in that, in order to increase heat resistance, it contains allyl cyanoacrylate and, in addition, organic peroxide in the following ratio of components, wt.%: Allyl cyanoacrylate, 89 -98.5 Vis-ester of 2-cyanbutadiene carboxylic acid Organic re-0, 1-1. Sources of information taken into account in the examination 1. Japan patent number 8732, cl. From 09 J, published. 1973. 2. Trofimov N.N. et al. Properties and Modification of Cyanoacrylate Adhesives, Zh Plastic, No. 9, 1976, p. 57-58 (prototype)