SU593673A3 - Method of bonding materials together - Google Patents

Description

(54) METHOD OF GLUING MATERIALS

in terms of polymerized ethylene. In addition, peroxides and other radical-forming agents, such as perbenzoate, dilauryl peroxide, didecanoyl peroxide, di-tert-butyl peroxide, dinitrile of azo-isobutyric acid, in amounts of mol. on the mill it is in terms of polymerized etilen,

Polymerization can be carried out in the presence of retarders such as, for example,

aliphatic alcohols, saturated and yen, saturated hydrocarbons, chlorinated hydrocarbons, and hydrogen. The polymerization can be carried out continuously or discontinuously, with the continuous method being preferred. .

In this case, the copolymer is separated from the reactor and a part of the monomer, the initiator and the one not participating in the reaction, is again returned to the reagent.

A copolymer is obtained: in a continuous autoclave installation, the main element of which is a autoclave equipped with a magnetic stirrer and electric to heating. ,

Prior to introduction into the autoclave, gaseous additives, such as oxygen as an initiator and, if necessary, propane as a moderator, are added to the ethylene and condensed it up to the reaction pressure. The reaction mixture passes through a preliminary under Trevatedi and then enters the autoclave. At the same time copolymers if necessary. dissolved or diluted

The form is fed to the reactor by means of two high-pressure metering pumps having different capacities. Particularly advantageous solvents are low-molecular, polar organic compounds, such as methanol, ethanol and butanol. Determination of adhesion strength is carried out on aluminum specimens with the following procedure

Peeled aluminum strips.

100 mm long, 100 mm wide and 1.5 mm thick, 70 mm long are glued together under a press (1 kgf / cm pressure, 30-4 O pressing time with a pressing temperature of 180 s) with the help of films of corresponding ethylene copolymers The dummy is 0.2 mm thick and is obtained by extrusion or extrusion through a slit die. In another case, having

The same dimensions of aluminum strips under the same conditions are connected to a plate made of polyethylene: high pressure which is 4. mm thick, non-glued sections of aluminum strips at a right angle

fold back in opposite directions.

The composition of the copolymers and the test results are given in table. 1, from which it can be seen that the introduction of soft vinyl groups into the composition of the sonolimer-glue melt significantly increases the adhesive strength. .

Data for examples of the composition of the copolymer, and Data on the resistance to peeling 35;: are given. tab - 2.

Table

13.6

2.9

13.1

2.4

13.3

2.7

0.4

3.2

Insufficient adhesion

3,80,5

14.0

3.0

13.0

2.8

13.5

2.7

11.2

2.7

1O, 6

3.0

(N

but

ft

Che

as

H

WITH

W

00

Claims (2)

1. Slavina G.L., Accountant V.I., Krundel V, X. Kle-alloys based on a copolymer of ethylene and vinyl acetate. Sat New adhesives and gluing technologists, M., ed. MDSTP, 1973, p. 57-59. 2. The patent of France No. 1396991, cl. From 09 J, publ. 1970.