SU971851A1 - Rubber stock - Google Patents

Description

The invention relates to a rubber mixture and can be applied in the rubber industry for the manufacture of parts operating under dynamic loads and corrosive environments.

A vulcanizable rubber compound based on synthetic rubber is known, which contains organosilicon compounds of the type alkyl (phenyl) -p- (o) alkylphenoxysilanes of the general formula

to

I

O-g L- O, where E-Me, Ph;

 , R-CH5, C2l4, C4 "9

in the amount of 0.5-1.0 mach. on 100 ma.ch. rubber 1.

 However, the known mixture is characterized by insufficient durability of rubber under the influence of dynamic loads and corrosive media / and these organosilicon compounds have poor compatibility with rubbers and high volatility, which makes them unsuitable for the rubber industry.

The most rubbery to the invention of the technical essence and the achieved result is a rubber compound based on synthetic, including the modifying additive organosilane (alkyl silane - methyl vinyl chlorosilane) G2},

However, this rubber mixture has unsatisfactory indicators of wear resistance and durability of rubber from it under the conditions of the impact of dynamic loads to corrosive media.

The purpose of the invention is to increase the wear resistance and durability of rubbers from this mixture under the conditions of exposure to di-. heavy loads and aggressive environments .;

This goal is achieved by the fact that a rubber mixture based on synthetic rubber, including a modifying additive, organosilane, contains as a modifying additive a mixture of total organosilane (APS) of the formula

 /

where R is from C — H C. R is CH, G — CH, Qt-CH, CdH, in an amount of 2-12 wt.h. per 100 wt rubber with alkylphenol (AF) of the general formula where H is wso-Cgltiy-CijIig, in an amount of 0 / 5-2 wt.h. on May 100 rubber. In order to compare the properties of the known mixture with the proposed one, rubber is prepared on the basis of SKI-3, 1 tabl.1), SKN-26 (Table 2) ISCED 1 tabl. 3). Example. Prepare a mixture of the following composition, wt.h, - SKI-3 100) sulfur 2.5; Santocur 1.0, Zinc oxide 2.01 Stearic acid 2.0; technical carbon PM-75 40 adeto namid 1,5. AFS of the formula (AFS-2) O-Si-O and AF of the formula (AF-2) are introduced into the rubber mixture. Dosages of the components of the AFS / AF based on the known and proposed mixtures are given in Table 1. min PRI mme R 2. Prepare a mixture of the final composition, parts by weight: CCH-26,100 sulfur 2, o; altax 2.0 zinc oxide. 5, o; Santokyur 1, OJ peroxynosis 1.0, carbon black PM-15 96, ste, arias 1.0, dibutyl sebacinate 2.5. APS formulas (APS-1) - O-SiCH are introduced into the rubber mixture. And AF of the formula (AF-1} no-X)) The dosage of the components of AFS / AF and the properties of rubbers on the basis of the known and proposed ones are shown in Table 2. Vulcanization mode: for 30 minutes. Example 8: 3. A mixture of the following composition was prepared, parts by weight,: EPDM 100; sulfur O, b, zinc oxide 5, peroximone 7, 5; technical carbon PM - 75 40. In the rubber mixture, the AFS of the formula (AFS-3) CH and AF of the formula (AF-1} io are introduced (Dosages of the AFS / AF components and the properties of rubber-based EPDM from the known and proposed mixtures cured in Table 3. 165 C for 40 minutes As can be seen from Table 1-3, the introduction of alkylphenylsilanes and alkylphenols of specified structure into rubber mixtures compared to the prototype leads to a significant improvement in durability and durability, dynamic endurance and resistance to aggressive media of rubbers (wear resistance less by 25-75%; toykost to dynamic loads niche 10-50%, resistance to aggressive media up lQ-70 i.

Table 1

The number of cycles to failure upon repeated stretching,

thousand

Abrasion cm / kwh

The aging rate of strength in acetic acid when within 24 hours

The number of cycles to failure during repeated stretching, thou.

Abrasion

cm / KWh

The aging rate of strength in acetic acid when within 8 h

The number of cycles to failure upon repeated stretching,

18.0

18

20

218

262 360

0.58

0.4

0.45

0.6

2.2

3.2

560

310

320

0.47

0.63 0.61

0.47

Table 3 of the invention. A rubber mixture based on synthetic rubber, comprising a modifying additive - organosilane, which, in order to increase the durability and durability of rubber from this mixture under conditions of dynamic loads and corrosive media, it contains an organosilane mixture as a modifying additive. of the general formula R O- $ 1-0. A, where E-iso YdN U 21 B-CH 3 j, CH 2 (5H, e glls in the amount of 2-12 May, hours on 10 May, h rubber with alkyl phenols of the general formula HRE B -aso-CgHiY ioH-zi, and in the amount of 0.5-2 parts per part per 100 parts per part, and sources of information taken into account in the esepertiz 1. Autoreture certificate of the USSR No. 301347, class C 10 M 1/50, 1971. 2, Makhlin V "E. Modification of elastomers with silicon compounds. M., NIITEKHIM, 1974, p. 35 (prototype).

Claims (1)

Claim A rubber mixture based on synthetic rubber, including a modifying additive. - organosilane, characterized in that, 5, in order to increase the wear resistance and durability of the rubbers from this mixture 'under the influence of dynamics in the amount of 2-12 wt.h. per 100 parts by weight rubber with alkyl phenol of the general formula where B ^_ "30 ^_ Cglii7 £ 40 ^ -21 ,. loads and aggressive media, it contains, as a modifying additive, a mixture of organosilane containing Ή- from 10 ^ 21 " K'-CHj ·, a-CH _3, CH ₂ = CH, β _θ Ή ₅ in an amount of 0.5-2 parts by weight per 100 parts by weight '- • auchuka.