SU857180A1 - Rubber mixture based on butylrubber - Google Patents

Description

FIELD OF THE INVENTION The invention relates to rubber industry and relates to the development of a rubber mixture based on butyl rubber. Known rubber compound based on vinyl polymers, including zooctyl adipate as a plasticizer or diy. Butyl rubber based rubber compound, including vulcanization activator, dispersant vulcanizing group, filler and plasticizer, such as stabiloyl-18, is also known, with a ratio of components of 100.0: 5, 0: 3,: 3,95: 50,0: 0,30 2. However, this mixture does not provide for cold resistance of rubber, durable hardiness, elasticity, as well as improving the plasto-elastic properties of the mixture while simplified and recycling of the latter technology. The purpose of the invention is to increase the frost resistance of rubber, improve their dynamic endurance, increase elasticity, as well as improve the plasto-elastic properties of the mixture while simplifying the processing technology of the latter. The goal is achieved by the fact that a rubber compound based on butyl rubber, including a vulcanization activator, a dispersant, a vulcanizing group, a filler and a plasticizer, S as the latter contains diisooctyl adipate with the following ratio of components, wt.%: Butyl rubber 51.8 - 56 , 1 Vulcanizing group 2.6 - 2.8 Vulcanization activator2, 6 - 2.8 | spurger 1.60-1.68 Napoliolitel 31.0 - 32.7 Diisooctyl adipate 5.5 - 10.4

Diisooctyl adipate has main indicators in comparison with stabiloyl-18 (Table 1). Table 1 shows the properties of plasticizers.

From the analysis of Table 1, one can see the advantage of diisooctyl adipate in low-high-temperature properties in comparison with the known plasticizer, stable oil-18. The use of diisooctyl adipate allows improving the sanitary and hygienic conditions of work in the vulcanization shops and eliminating the heat of the storage compartments of plasticizers. .

To test the effectiveness of the proposed plasticizer, eight mixtures of ingredients containing the known plastic stabilizer-18 and the proposed diisooctyl adipate are made and tested.

The recipes of the mixtures are set forth in Table 2.

Table 3 shows the mode of manufacture of rubber compounds. Manufacturing

Indicators

Kinematic viscosity at

Pour point, ° С

The temperature of glass mixtures is carried out in a laboratory mixer in two stages.

Vulcanization is carried out in hydraulic presses with electrical heating at 170 ° C. The optimum vulcanization is determined at the volcamer of the Metallist Plant. The mixture and volcano are tested in the rubber technology laboratory of the Kirov Polytechnic Institute.

Production and testing of the mixture in the central factory laboratory of the Kirov Tire Plant with known and proposed facilities is made and tested.

Table 4 shows the properties of mixtures and rubbers of them.

As can be seen from Table 4, the rubbers from the proposed mixture are characterized by better frost resistance, improved dynastic endurance and elasticity. In addition, the proposed mixtures have the best plasto-elastic properties, and also require simplified technology for their processing. Table 1

DiisooctylamineStabiloil-18 linat

46.5

/ b - 60 -15.

table 2

1.68 1.6 1.6 1.6

33.69 32.7 31.9 31.0 2.8 5.5 8.0 10.4

Vutyl rubber + betshla zinc + 1 stearin + 1/2 oils +

Indicators

ii: io: nn-TJi: i Plasticity according to Carrère K, 0.188 0.253 0.349 conventional units ; Mooney Viscosity, U.S. K Tendency to cure

1.68 1.61.61.6

33.69 32.7 31.9 31.0

2.8 5.58.0 10.4

Table 3

Table 4

Claims (2)

Mixture, no. 0.388 0.32 0.32 0.42 0.39 Indicators Endurance during repeated deformation of the growth, cycles 5670 7290 8910 Thermal aging coefficient: 0.82 0.78 0.81 strength with respect to relative elongation 0,65 0, 67 0.72 residual elongation at 393 K 0.68 0.70 0.71 Coefficient of temperature resistance 0.54 0.48 0.50 relative elongation 0.69 0.68 0.77 residual elongation 0.59 0 , 43 0.56 -PE2325 § 13505, T G T | I | j J..1..2 ..... 8571808 100 87210 36465 24774 15730, 74 0.87 0.91 0.83 0.85, 63 0.52 0.59 0.52 0.57 0.69 0.46 0.48 0.46 0.52,. i 0,43 0,58 0,54 0,49, 0,54 0,78 0,84 0,70 0,75 0,52 0,66 0,63 0,44 0,38 Claim of the invention Rubber mixture based on butyl rubber, which includes a vulcanization activator, a dispersant, a vulcanizing group, a filler and a plasticizer, so that, in order to prevent the cold resistance of rubber from this mixture, to improve their dynamic endurance, to increase elasticity, and to improve the plasto-elastic properties of the mixture while simplifying the processing technology of the latter, the mixture as a plasticizer contains. diisooctyl adipate in the following ratio of components, wt.%: OO 51.8 - 56.1 Butyl rubber 2.6 - 2.8 Vulcanizing group Volcanic activator2, 6 - 2.8 oztion 1.60-1.68 Disperser 31.0 - 32 , 7 Filler Diisooctyl 5, 5 - 10.4 nat. Sources of information taken into account during the examination 1, RZHH, 1971, and C A73. 2. Lazurin E.A. et al. The effect of mineral oils on the properties of unfilled mixtures and vulcanizates from butyl rubber. Production of tires.-RTI and ATI, 1978, No. 1, p. 1-3 (prototype).