SU1073251A1 - Polymer composition for manufacturing friction materials - Google Patents

Abstract

THROWING KSZHPOSITSION FOR OBTAINING FRICTIONAL MATERIALS, including butadiene nitrile rubber, tetrachloroisoquinone, zinc oxide, polyester acrylate, asbestos, barite concentrate or iron oxide, o t. This is so that, in order to increase braking efficiency, improve the recoverability of braking, as well as reduce the cost of materials while maintaining adequate mechanical strength of the latter, the composition additionally contains cryolite and phosphogypsum in a ratio of respectively 1-2: 1 , a x Uoneites are taken in the following ratio, May: Butadiene nitrile 10-23 rubber, 41 Polyether acrylate 1.58-5.00 Tetrachloroben3oquinone 0.58-2.00 Zinc oxide. 20.00-29.21 Asbestos 10-15 Cryolite 7.5-10.0 Phosphogypsum Barite enditrate or iron Rest remaining

Description

  d

The invention relates to the asbestos industry, in particular to the development of a composition for the preparation of friction materials. The known polymer composition for the production of friction materials including butadiene rubber, phenolic resin, dehyde resin, iron minced iron filler, sulfur accelerator vulcanizing group, phosphogypsum (moisture 11.8–12.47%). And asbestos, for example, 1320: O, 3-5 ; 15-30: 5.2-10.5: O, 5-40: the rest of the GsL. The materials of this composition do not provide the necessary braking performance and recoverability. Closest to the present invention is a polymer composition for the preparation of friction materials C 2 intended for operation in brake assemblies of machines and mechanisms, including components, in wt%: Butadiene-nevril. Yauchuk 10-23 Tetrahlserbenzoquinone .0, Zinc Oxide 0, Polyetherkrapat1-5 Barite coicent. Army or iron oxide 2.0 to 50 Asbestos 30 to 50 The disadvantage of the decree; the advantage of this arrangement is relatively low efficiency. This {Yau aug and the recoverability of braking efficiency and the use of asbestos in large quantities. The purpose of the invention is to apply efficiency to the burner, to improve the recoverability of braking efficiency, as well as to reduce the cost of the bridge materials (with asthmatic replacement of asbestos) while maintaining adequate mechanical strength after them. This goal is achieved in that a polymer composition for the preparation of friction materials, including nitrile rubber. tetrachlorobenzoquinone, zinc oxide, polyether acrylate, asbestos, barite concentrate or iron oxide, additionally contains cryolite and phosphogypsum at a ratio of 1-2: 1, respectively, and the components are taken in the following ratio, wt.%: Butadiene Nitrile Rubber 10-23 Polyether acrylate 1.00 -4.41 Tetrachlorobenzoquinone 1.58-5.00 Zinc oxide. 0.58-2.00 20.00-29.21 Asbestos Cryolite 10-15 Phosphogypsum 7.5-10.0 Barite concentrate or iron Else Examples 1-6 The composition is prepared in a rubber mixer, the mixtures are crushed and pressed into briquettes without heating, and then heated in a known manner. For a comparative evaluation of the friction properties, several compositions for brake linings have been made, the composition of which is given in Table. 1. The results of comparative tests of brake linings carried out in a full-scale assembly of a GAZ-53A automobile on an inertial stand of STIN-B according to. method of EC-001T are presented in Table. 2. From table. 2 that materials from the proposed compositions have a higher braking efficiency during heating, recoverability of efficiency, less loss of braking efficiency. Mechanical strength does not decrease with decreasing asbestos. The combination of high frictional properties and mechanical strength allows to improve the performance of brake systems (materials), to increase their reliability. At the same time, the replacement of asbestos according to preliminary calculations in comparison with limestone makes it possible to export 2 thousand tons of asbestos annually, thereby significantly reducing the cost of materials. Table

Butadiene. roll 16, 6 uchuk 16.6

16.6 23 20

10 44 .40 72 69 3.3. 3.2

Continued table. one

35

32

30 32

39

68

98 98

97

99

3.3 3.4 3.4

3.4

Claims (1)

HALF DIMENSIONAL COMPOSITION FOR PRODUCING FRICTIONAL MATERIALS, including nitrile butadiene rubber, tetrachlorobenzoquinone, zinc oxide, polyether acrylate, asbestos, barite concentrate or iron minium, and so on, so as to increase the efficiency of braking braking efficiency, as well as reducing the cost of materials while maintaining adequate mechanical strength of the latter, the composition additionally contains cryolite and phosphogypsum in a ratio of 1-2: 1, respectively, and the components are taken . In the following ratio, wt%: Nitrile butadiene rubber 10-23 Polyester acrylate 1; 00-4.41 Tetrachlorobenzoquinone 1.58-5.00 Zinc oxide. 0.58-2.00 Asbestos 20.00—29.21 Cryolite 10-15 Phosphogypsum 7.5 “1θ, 0 Barite concentrate or iron minium