SU737420A1 - Ethylene-propylene rubber-based rubber mixture - Google Patents

Description

(54) RUBBER MIXTURE BASED ON GRAINED PROPYLENE RUBBER

one

 The invention relates to the rubber industry, in particular to the development of a rubber mixture based on ethylene propylene rubber.

Known rubber mixture based on ethylene polypropylene rubber, including fluorine rubber and butane nitriphenol rubber, for example, in the ratio of 60-80: 10-20; 10-20 1., D

Rubber from a known mixture have unsatisfactory resistance to isi-; wounds.

The purpose of the invention is to improve the abrasion resistance of rubber from a known mixture.

The continuous chain is comprehended by the fact that the rubber mixture based on ethylene-propylene rubber, including fluororubber and butacienitrile rubber, additionally contains magnesium oxide, acrylonitrile and oligoether acrylate in the following ratio of components, May, hours:

   2 -

Ethylene propylene

rubber - 60-8О

Fluororubber1O-2O Butadiene Nitrile

rubber1O-20

Magnesium oxide 5-25

Popnagryponktrsh 5-20

Oligoefrancrylate I-1O. Example. Rubber mixture composition, wt, h ,:

Et lenprop endienovy SKEPT80 FCS rubber rubber rubber SKF26-10 Butagaenyitrip ny SKN18-10 CA1 gvny carbon black mark PM75 LP Dibutilsebatsinat10 dikumila2,4 Sulfur Peroxide 7 H3roTaBnHBaKw on Val'pa and vulcanized ute. These mixtures are preliminarily introduced (additives. The data are given in Table 1. It follows from the obtained data that the introduction of oligoether acrylate (EEA), polyacryponitripe (PAN) and magnesium oxide into a known mixture of ternary combination makes it possible to reduce the abrasion of rubber by about two times. Others figures do not change. If you add the same amount of active filler (mixture 2) to the mixture instead of PAN and OEA, the abrasion does not improve. The rubber properties are listed in Table 1.

Strength,

Mpa

Relative extension, %

Residual elongation,%

Claims (2)

Resistance to abrasion, cm sq. MS. As can be seen from the H9 tables presented, rubber from the proposed mixture (in comparison with a known technical solution) is characterized by increased resistance to abrasion. Claims of the Invention Rubber mixture based on ethylene propylene rubber, including fluororubber and butadiene nitrile rubber, is characterized in that, in order to increase the abrasion resistance of rubber from this mixture, the latter is an additional 11,0.0 10 ten 210 210 200 190 ten 12 ten ten 40О 200 190 200 Parameters 2. Rubber mixture mixture, parts by weight: Ethyl propylene rubber SKEP SKF SKN, Tzhuglerod PM 75-20, Dicumyl peroxide 2.4 Sulfur 0.7. Variable dosages are given in l. 2. The mixture is made on rollers vulcanized, t. Table 2, but Contains magnesia, polyacrytonitrile and oligoether acrylate in the following ratio of components by weight. These are ethropigeene rubber 60-80 Fluorine rubber 10-20 Magnesium oxide, 25-25 Polyacrylonitrile 5-20 Otigoemiracrylate1-10. Sources of information taken into account in the examination 1. USSR author's certificate №417440, cl. C O8 L 23/16, 14.02.72 (prototosh).