The rubber mixture based on the combined nonpolar rubbers

 

(57) Abstract:

The invention relates to the rubber industry. Preparing a rubber mixture based on rubber stamps: SKI PM and SKD 2 gr. The mixture comprises by weight.h.: sulfur-containing accelerator system 0,5-1,0; neurostream accelerator system 0,25-1,2; sulfur vulcanizing agent 2-6; activator accelerator systems 2-8; protective group from 0.2 to 1.0; stearic acid 0.5 to 2.0; fillers 80-120; softner 5-8. The invention allows to obtain rubber products with high performance at low temperatures (-60°C). table 2.

The invention relates to the rubber industry, in particular to the development of rubber-based polymeric rubbers for producing shock absorbing pads podrelsovoe and rail fasteners used in the top structure of a way.

Closest to the technical nature of the proposed mix is a rubber compound for the manufacture of rubber products based on a combination of non-polar rubbers (ACS and ACS, SCMS and ACS), including a vulcanizing agent (sulfur), sulfur-containing accelerator system (sulfenamid C), activator accelerator systems (zinc oxide, stearic acid), samiy plasticizer in required quantities (see RF patent № 2009152, publ. 15.03.95, PL. 3, example 3).

However, the rubber mixture (patent RF № 2009152, publ. 15.03.94) has a temperature brittleness (-45C), lower strength characteristics in comparison with the proposed rubber mixture PM-02 (see tab.2, examples 1-3).

Technical problem on which this invention is directed, is to obtain a rubber mixture based on a combination of non-polar rubbers, rubber products of which would have a higher technical characteristics at lower temperatures (-60C).

The technical result is achieved by the fact that the rubber mixture based on the combined nonpolar rubbers containing sulfur-containing accelerator system, the sulfur vulcanizing agent and the components of the mixture as an activator of the accelerator systems, the protective group, stearic acid, fillers, softening agent, as a combined non-polar rubbers contains rubber stamps SKI PM and SKD 2 gr. and additionally neurostream accelerator system, in the following ratio, wt.h.:

Rubber SKI PM and SKD 2 gr. 100

Sulfur-containing accelerator system0,5-1,0

Neurosugery accelerator system of 0.2 CLASS="ptx2">

Protective group0,2-1,0

Stearic acid 0.5 to 2.0

Fillers 80,0-120,0

Softner 5,0-8,0

Introduction neurosugery accelerator system in the claimed combination of features allows you to get the rubber mixture for the manufacture of rubber products with high performance at low temperatures (down to-60C).

Rubber custom rubber mixer PC 250-20. Download rubbers, activators, antioxidants was carried out at a temperature of 80-100C, the input sulfur was carried out on the rolls at a temperature of 80C.

Examples of formulations of rubber compounds are given in table. 1, the properties of the rubber - in table. 2.

Physico-mechanical properties of vulcanizates of the rubber mixtures is given in table. 2.

From table. 2 shows that the tear resistance is increased by 44.3-53,4%, which significantly improves the physico-tehnicheskie properties of rubber products.

The rubber mixture based on the combined nonpolar rubbers containing sulfur-containing accelerator system, the sulfur vulcanizing agent and the components of the mixture as an activator of the accelerator systems, the protective group, stearic acid, napolcom SKI PM and SKD 2 gr. in addition neurostream accelerator system, in the following ratio, wt.h.:

Rubber SKI PM and SKD 2 gr. 100

Sulfur-containing accelerator system 0,5-1,0

Neurosugery accelerator system 0,25-1,2

The sulfur vulcanizing agent 2,0-6,0

Activator accelerator systems 2,0-8,0

The protective group of 0.2-1.0

Stearic acid 0.5 to 2.0

Fillers 80,0-120,0

Softner 5,0-8,0

 

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