SU939466A1 - Process for producing laminate material - Google Patents

Description

(3) METHOD OF OBTAINING LAYERED MATERIAL

one

The invention relates to the creation of composite materials based on various rubbers from rubbers differing in the degree of unsaturation, such as isoprene (SKI-3) and ethylene propylene diene (EPDM), duplicated with each other and possessing high heat resistance and bond strength at the interface, and can be used in the rubber industry, for example, in the manufacture of conveyor belts with improved performance properties.

A method of producing a laminate is known, including duplicating a layer of a composition based on ethylene-propylene diene rubber with a layer based on polyisoprene (isoprene rubber SKI-3) through a layer of glue containing these rubbers, followed by vulcanization With. However, this laminate requires special adhesive layers, technologically complex and not sufficiently high heat resistance and bond strength between the layers.

There is also known a method for producing a layered material, which includes duplication of a layer of a composition based on EPDM and dicumyl peroxide (MPC) with a layer of composition on the base, polyisoprene and MPC, followed by vulcanization 2.

However, the material does not have a sufficiently high heat resistance and bond strength, which does not allow the carrier to be able to use it in the manufacture of a number of important rubber products 2.

The purpose of the invention is to increase the heat resistance of the material and strength

20 connection between the layers.

The goal is achieved by the method of producing a laminate, including duplicating a layer of a composition based on

ethylene-propylene-diene rubber and dicumyl peroxide with a layer of a composition based on isoprene rubber and dicumyl peroxide followed by vulcanization; in each of the compositions for these layers, additional M-1-hydroxy-2,2,2-trichloroethylmethacrylamide is added in an amount of 3-10 May. h on 100 ma.ch. rubber

Examples 1-1. A rubber compound laminate is prepared.

The composition of the layered material is given in table. one.

The layers based on SKI-3 and EPDM are prepared by separately mixing the corresponding ingredients on standard rollers without special cooling. The additive is added at the end of the mix. The resulting mixture (composition) is duplicated manually or on a standard calender, and then vulcanized in an electric press in the optimal mode.

The rubber mixtures are duplicated in pairs (1-2, 3-, 5-6, 7-8, 9-tO, 11-12, 13-lM and vulcanized in the press at 5 minutes. The bond strength between the layers of material is determined by delamination the obtained compositions on tensile machines (GOST 6768-53). Heat resistance is determined according to GOST 6768-53 after heat aging.

In tab. 2 shows the data for determining the bond strength between

the layers of the proposed laminate in comparison with the prototype and its heat resistance.

Given in Table. 2 data show that the use of OTHEMA leads to a significant increase in thermal stability of the duplicated system compared to the prototype and

increase in bond strength between duplicated rubber mixtures based on SKI-3 and EPDM by 200-250% (up to 5 kg / cm), which exceeds the requirement for bond strength between

layers of the layered material and its heat resistance used in the manufacture of conveyor belts (core with SKI-3 gouging and covering layer of EPDM) have experimentally proved the possibility of making a production sample of the transport tape, which is a laminated material with the top layer and core

(inner layer) of SKI-3, reinforced with fabric.

In tab. 3 shows the data on the heat resistance of the rubber-fabric material of the sample of the conveyor belt with SKEPT lining and SKI-3 squeegee.

Thus, in terms of its heat resistance, the proposed material exceeds the known by one, times.

Under normal2,5 conditions x2.0

,five

"".ABOUT

3.5

3.9

Table 3

Claims (1)

Claim A method for producing a layered material, comprising duplicating a layer from a composition based on ethylene propylene diene rubber and dicumyl peroxide with a layer from a composition based on isoprene rubber and dicumyl peroxide followed by vulcanization, characterized in that, in order to increase the thermo. material durability and strength bonding method, 6 - known. between layers, in each of the compositions for these layers is introduced 40 additional I-1-hydroxy-2,2,2-trichloro ethyl methacrylamide in an amount of 3-10 parts by weight per 100 parts by weight rubber.