SU883132A1 - Method of gluing polyvinyl chloride - Google Patents

Description

(54) METHOD OF GLUING POLYVINYL CHLORIDE The invention relates to the field of bonding polyvinyl chloride materials in various areas of hard-casting with a strong fastening of a scientific research institute and in strong workmanship during finishing work. There is a method of gluing various materials, including polyvinyl chloride, with a preliminary organic surface treatment of a stable organic radical selected from the group including iminoxyl, verdazyl, pdrazilny, hydrocarbon and phenoxene radicals 1. However, this method does not provide sufficient; bonding strength .. The closest to the technical essence and the achieved result to -invention is the method of gluing polyvini} of chloride, which consists in processing the joining of surfaces with a dimer of 3,3-dimethylene-2,2,6,6-tetrameetch1-4-oxophenylchol or dimer-3-dimethylene, 2,6,6-tetramethyl-4-ox-sheridin-1-oxyl, applying the adhesive composition and contacting the surface 2. However, the known method does not provide sufficient bonding strength. The purpose of the invention is to increase the bonding strength. The object of the invention is achieved in that according to the method of gluing polyvinyl chloride, which consists in treating the joining surfaces, applying the adhesive composition and contacting the surfaces, the treatment is carried out with a 20-3096% solution in acetzhe oligomero of the general formula - SiC X 4- 6

STI

CH-CH, -X 3-6

According to the inventive method, perchlorovinyl-based adhesives can be used, for example, Mars glue, including paddles; perchlorovinyl resin 20, phenol formaldehyde resin 101 K 10, epoxy resin ED-20 1, dibutyl phthalate 1, ethyl acetate 68, Moment glue based on nairite and phenol formaldehyde resin, polyurethane glue UK-B-2.

Example 1. Hard PVC plates are degreased with acetone and, after drying, are coated with a 20% acetone solution of the oligomer of formula 5

| () swab. After drying the sample, a layer of Mars glue is applied to it, then after a 5-minute latch at room temperature, a second layer of glue. After 12 min, the samples are soylated under pressure

3 kgs / cm n was incubated for 4 hours. For a separate group of samples, the oligomeric modifier was applied twice.

The tests were carried out 24 (48) hours after the pressure was removed (the machine was discontinued RMI-60, the speed of the terminals was 100 mm / min). The shear strength after 24 hours is 8.7 kg / cm in a single layer of modifier, with 2 layers x 10.1 kg / cm, and in 48 hours 11.7 kg / cm.

Example 2. Analogously to Example 1, polyvinyl chloride plates were glued together. The plates were treated with an oligomer of the formula

X - 4-6.

The shear strength after 24 hours with a single layer of modifier is 10.1 kg / cm; with 2 layers x 8.4 kg / cm.

The table presents the comparative data of bonding strength according to the proposed and known methods.

Known 1. (stable radicals) Known 2

Dimer of 3,3-di-Methylene 2, 2,6,6-tetramethyl-4-oxopiperidna Dimer of 3,3-dimesh1_2. 2,6,6-tetramethyl-4-oxopiperidine-1-oxnla

-) f

9-10 9.7 7-9 9.1

10-12

11, 4 9.8 8.2

13.9

8.7 11.8 8.3

13.2

Continued tab searched

Claims (1)

SUMMARY OF THE INVENTION A method for bonding polyvinyl chloride by treating joined surfaces, applying a de-adhesive composition and contacting the surfaces, characterized in that. c, in order to increase the strength of adhesive joints, processing is carried out with a 20-30% solution. in acetone oligomers of the general formula or “T-2”);