SU1435596A1 - Adhesive mastic - Google Patents

Abstract

The invention relates to synthetic polymeric adhesive compositions, in particular to adhesive mastic, intended for gluing polyvinyl chloride linoleum of polystyrene tiles and parquet to cement-sand concrete and other surfaces. The invention allows to increase tensile strength and reduce time drying of the adhesive layer of mastic due to the fact that, as a plasticizer, it contains a complex dehydrodicyclopentadienyl ester (E) of synthetic fatty acids C -, - Cd of the formula rS chX -osnos7-C9 and dissolve as (F) - a mixture of ethyl acetate and petrol in the ratio SRI 1: 1. Mastic according to the invention contains the following components, May.7,: indene-coumarone resin 26.8-28.85, E 3.85-10.7, R 14.3-15.38, chalk 48.2- 51.92 . 3 tab. ё д№а stECESBE-rf

Description

The invention relates to synthetic polymeric adhesive compositions, in particular, adhesive glue mastic, pre-bonded for gluing polyvinyl chloride linoleum, polystyrene tiles and parquet to concrete, cement-sand and drupda surfaces,

The purpose of the invention is to increase the strength to tear and reduce the time required for bonding the mastic layer.

The proposed i5 mastic plasticizer - dihydrodicyclopentadienyl ether of synthetic fatty acids of SJ is obtained by cycloalkylation of synthetic fatty acids Cy-Cj dicyclopentadiene, isolated from the products of pyrolysis of petroleum raw materials:

ODS-SeSoon0

II

SNOSS-Sd

CM2

 To obtain this ester, 23.72 g of perchloric acid is added to 288 g of the commercial fraction of FFA, 396 g of cyclopentadiene within 1 hour. The mixture is heated on a water bath at 50-60 ° C for 4 hours. After the end of the experiment | The ions, the mass, is cooled to rooms of the first temperature, then dissolved in benzene (I), neutralized with a J 0% soda solution, washed, and dried over calcined sodium sulfate. After the solvent has been distilled off, the product is subjected to vacuum distillation and the synthesized dihydrodicyclopentadienyl ether, FFA CT-Cj, which has a so-called bp. 105 189 ° С at 1, 33 MPa,

,20

1,0179; 1.4951; saponification number found: 170.8 mg KOH / g, bromine number 50.2 g / Vg, yield 85.6% of theory, flash point 190 ° C, volatile matter content 0.016%, viscosity, acid number, 0.01 mg KOH / G.

The solvent used is a mixture of ethyl acetate and gasoline Galosh.

Ground chalk is used as a filler, and inden-coumarone resin is used as a binding agent.

We offer adhesive mastic in the following way.

In a laboratory blender of the type CPK-800, whose working bodies are serv

five

0

Q

40

- two horizontal rotors, rotating in opposite directions, are loaded, the components are loaded in the following sequence: first, an inden-coumarone resin is loaded, which is crushed in the mixer by means of rotating rotors, then a plasticizer and a mixture of solvents - ethyl acetate and Galosha gasoline are loaded into the mixer.

A pre-ground filler — chalk — is loaded into the resulting homogeneous solution and, with the help of rotating rotors, the contents of the mixer are adjusted to a uniform paste. The finished adhesive mastic is discharged into the container.

All operations for the preparation of adhesive mastic are carried out at ambient temperature.

The tensile strength (adhesive strength) is determined by a known method.

For testing, samples of size 50x30 cut from polystyrene tiles, polyvinyl chloride linoleum and wooden tiles are taken. The test mastic is applied in a uniform layer on a preparatory substrate and on a concrete base for 7-10 minutes (until reflux), and then glued.

The sample prepared in this way is held at 18-25 ° C for 24 and 72 hours and 10 days.

The test is carried out on a discharge machine equipped with special grippers. A concrete base is inserted into the upper grip, and a test sample is inserted into the lower grip. The grippers are placed in the clamps of a tensile machine, by means of which the glued tile or linoleum is detached from the concrete base at a gripping speed of 10-25 mm / min.

The compositions of adhesive mastic are given in Table 1; physical and mechanical properties in table 2.

In compounds 1 and 5, the content of the components is given outside the boundary values (negative compositions).

As can be seen from the table, with an increase in the concentration of the plasticizer, the adhesive strength of the mastic decreases (compositions 2, 3, 5). Complete drying of the adhesive layer after 3 days of sticking, as well as tear strength with all types

31

After gluing the material after iO, gluing almost does not change. In the case of gluing polystyrene tiles, the adhesive strength is higher than PVC linoleum and wood tiles. The optimum content of the plasticizer is 3.85%,

Table 3 shows the comparative properties of the proposed adhesive mastic and the known - coumarone-oxole MKO mastic,

The data obtained show that the proposed paste mastic surpasses in its operational and technological characteristics the corresponding indicators of a known composition. The tensile strength increases when the optimum plasticizer content is applied by about 3 to 3 times.

In addition, in the proposed mastic, the time of complete drying of the adhesive layer is reduced by almost 3 times (Table 3), the maximum tensile strength (adhesive strength) in the proposed mastic is reached after 72 hours and practically does not change as u know

964

BUT ALSO. The mastic adhesive layer dries out only after 10 days.

Claims (1)

Invention Formula Adhesive mastic, including indomericon resin, plasticizer, solvent, chalk, characterized in that, in order to increase the peel strength and reduce the drying time of the mastic adhesive layer, it contains as a plasticizer dehydrodicyclopentadienyl ester of synthetic fatty acids C -, - Sd formulas CH2 SNOSOC-Cd and as a solvent - a mixture of ethyl acetate with gasoline in the ratio of 1r1 in the following ratio of components, wt.%: Inden-cumarone resin26.8-28.85 Said ether3,85-10,7 Solvent 14,3-15,38 Mel48.2-51.92 Inden-coumarone resin - binder Dihydrodicyclopentadienyl ether LIF - plasticizer A mixture of ethyl acetate and gasoline. Gaglosh in the ratio 1 1 Chalk - filler 29,428,8527,826,8.26,1 2.03.85 7.4010.713.0 15.715.3814.814.313.9 52,951,9250,048,247.0 Breaking strength (adhesive strength), kgf / cm 24 hours after gluing: Due to the minimum content of plasticizer, mastic is fragile, adhesive strength is low,  Due to the high content of plasticizer, the samples did not dry enough for 1 and 3 days, therefore the adhesive strength was low compared with compositions 2-4. table 2 Properties Known gum poly mastic coumarone-oxol according to literary data Tensile strength for tearing (adhesive strength), kgf / cm: 24 hours after gluing-. neither: PVC linoleum polystyrene tiles wooden tiles 72 hours after gluing: Table 3 We offer mastic actual performance 2.16-3.35 Adhesive layer 1,44-2,14 mastic low 1.11-2.1