SU794032A1 - Method of making rubber-engineering articles - Google Patents

Description

one

The invention relates to the rubber industry, in particular, to the development of a method for the production of rubber products.

The purpose of the invention is to increase the adhesion between the layers.

This goal is achieved by the fact that according to the method of manufacturing rubber products by impregnating glass fiber material with a precondensing resin, structuring the latter, applying a layer of rubber compound followed by vulcanization, the structuring of the precondensing resin is carried out to form a 50-70 wt.% Gel.

A known method for the production of rubber products by glass fiber impregnation, material with a precondensation resin, structuring (up to 100 wt.% Formation) gel) last, by applying a layer of rubber compound followed by vulcanization lj. However, this method causes low adhesion on the layers.

An example. The proposed method can be implemented, for example.

for the manufacture of rubber-fiberglass products, in particular rubber shock absorbers, reinforced with parts made of glass-woven press material, as follows.

From fiberglass press material STE1-1 (TU5 977-13047-75) based on

epoxy resin cured by triethanolamine titanate, placed in a mold, with hot pressing, a detail of the required configuration is obtained, and curing of the binder, structuring of the precondensate) is carried out to form a 50-70 wt.% gel. The obtained parts after cooling have sufficient mechanical strength, and their material retains adhesion properties.

The fittings obtained in this way are marked in the mold for the production of rubber-fiberglass plastic.

shock absorbers, filled with rubber compound and hot vulcanization, while simultaneously structuring the precondensate of the material of the fittings.

Strength / in units / at

Property different content of gel in the precondensate,%

over 70

less than 50 50-70

Not less than 0 0.6 1

1 0.6-0.4 O

The table shows the adhesion and mechanical strength of products depending on the size of the condensation gel.

As a result of using the proposed method, the grip strength of the rubber, provided during the vulcanization process, to fiberglass reinforcement exceeds by 15–20% this indicator in the manufacture of rubber fiberglass products by a known method.

The use of the method of manufacturing rubber products with reinforcement from thermosets, for example, glass fiber plastic, provides, in comparison with existing methods, an increase in the bond strength with the reinforcement material, due to the higher adhesion of rubber to the incompletely cured material of the reinforcement parts. In addition, the duration of the reinforcement pressing cycle is shortened, which increases labor productivity.

Claims (1)

1. Bakharev V.E. and others. Polymers in marine engineering. L., Shipbuilding, 1975, p.129 (prototype).