SU1366519A1 - Rubber stock - Google Patents

Abstract

This invention relates to rubber compounds based on unsaturated rubbers and may. be used in the tire and rubber industry. The invention allows to increase the wear resistance, fatigue endurance and tear resistance of rubber from this rubber mixture due to the additional introduction of an epihydrin alcohol oligomer. The rubber mixture according to the invention includes mac.ch .: a mixture of isoprene butadiene and butadiene methyl styrene rubbers in a weight ratio of 20:40:40 100; sulfur 1.5-2.0, zinc oxide 2.0-5.0, N-cyclohexnyl-2-benzthiazolyl sulfide 1.0-1.8, phthalic anhydride 0.1-1.0, N-isoprop- N-phenyl-p-phenylenediamine 2.0-3.5, indenkomarone resin 1.0-3.0, oleic acid 0.5-3.0, petroleum oil PN-BSCH 5.0-15.0, technical carbon with a specific geometrical surface of 95–105 m / g 40–65, epoxy resin 0.5–2.0, and prepolymer glycerol 0.2–1.0. 4 tab. S (L 00 O5 Ed cl

Description

113

The invention relates to rubber compounds based on unsaturated rubbers and can be used in the tire and rubber industry.

The purpose of the invention is to increase the wear resistance, fatigue strength and tear resistance of rubber from a rubber compound.

The invention is illustrated by the following examples.

PRI me R 1. Table 1 shows the composition of known and proposed rubber compounds.

The proposed mixtures 4-6 contain a glycerol prepolymer (an epihydrin alcohol oligomer) of the general formula

H-f O - GHg-CH-L I J)

HE

HE

where n 2 - 4 - 70Z;

n 1; 5 - 30%. The glycerol prepolymer is obtained by acylation of polyglycerol with carboxylic acids on alkaline catalysts or as a waste in the production of glycerol.

Mixtures of 3.7 comparison mixtures illustrate the overshooting of the suggested dosage range of the prepolymer glycerol.

The properties of the known and proposed rubber compounds are given in table 2.

Example2. Table 3 shows the compositions of the proposed mixture, confirming the interval of dosages of the ingredients of the mixture.

Mixtures 10 12 offered, mixtures 9,13 - mixtures, which illustrate going beyond the boundaries of the dosage range of the ingredients of the mixture.

The compositions of the sable according to examples 8-13 are given in table 4.

0

five

0

25

zo

35

40

45

50

92

Claims (1)

Claims: Rubber mixture based on isoprenene, butadiene and butadiene-methyl styrene rubbers in a weight ratio of 20:40:40, including sulfur, zinc oxide, N-cyclohexyl-2-benzthiazolyl sulfide, phthalic anhydride, L-isopropyl-K-phenyl- p-phenylenediamine, indenomeruonov resin, oleic acid, protective wax, petroleum oil, technical carbon with a specific geometric surface of 95-105 and epoxy resin, which in order to increase wear resistance, fatigue endurance and tear resistance of rubber from d this rubber mixture, it additionally contains a glycerol prepolymer of the formula Hf O - CHj-CH. - CH-, J OH I OH p where n 2-4 - 70% or n 1; 5 - 30%, with the following ratio of components ma.ch .: A mixture of isoprene, butadiene and butadiene methyl styrene rubber in a mass ratio of 20: 40: 40100 Sulfur 1,5-2,0 Zinc Oxide2.0-5.0 N-cyclohexyl-2-benzthiazolylsulfide 1.0-1.8 Phthalic anhydride 0.1-1.0 N-isopropyl-phenyl-p-phenylenediamine 1.0 Protective wax, 0-2.5 Indenkumarova resin1,0-3, 0 Oleic acid 0.5-3.0 Oil oil 5.0–15.0 Technical carbon with a specific geometric surface 95–105 MVr40-65 Epoxy resin 0.5-2.0 Glycerin prepolymer .0.2-1.0 T a b l and c a I ED-8 epoxy resin (diphenyl propane epoxide resin resin) Glycerol prepolymer Epoxy resin ARE- | 4 p-nitrosis odiphenyl-amine 1, 0 1, 0 1, 0 1, 0 1, 0 1, 0 0.1 0.2 0.5 1.0 3.0 3.0 1.0 0.5 Stress at 300% elongation, MPa Conventional tensile strength, MPa Well. after aging (20 ° С 24 h) at 100 C Relative extension , % Tear resistance, kN / m Resistance to multiple stretching at 100% elongation, thousand cycles Well. after aging (1204 24 h) Resistance to the growth of cracks up to 12 mm, thousand cycles n. y after aging (24 h) Abrasion 11.0 9.7 8.9 9.7 9.8 9.6 9.0 16.2 16.9 17.0 17.7 17.1 16.0 14.5 7.7 480 59 45 9.0 20 8.0 74 15.6 14.0 16.0 16.9 9.3 8.6 9.6 9.8 478 68 483 475 66 76 470 78 70 71 100 133 15.2 15.8 26.3 30.2 29 14 63 30 53 11 23 71 56 62 28 50 16.1 9.7 72 21 52 14.9 8.0 483 475 62 96 62 26.6 18.7 46 -32 9 70 Table 2 16.1 9.7 14.9 8.0 483 475 470 483 475 76 78 72 62 . 100 133 26.3 30.2 53 23 62 28 21 96 62 26.6 18.7 46 -32 9 71 56 50 52 70 SKI-3202020202020 SKD404040404040 SKMS-ZOARKM-15404040404040 Sulfur1,81,01,51,82,02,5 Zinc Oxide 3,01,02,03,05,010,0 N-Cyclohexyl2-benzthiazolyl sulfide 1, 50.71,01.5.1.82.5 Phthalic anhydride 0.50.010.0.10.51.01.2 N-Of opropyl-L-phenyl-phenylenediamine 1, 00,51,01,01 01,5 Wax CZ-12,00,51,02,02,53,0 Inden-coumaronov. resin 2,01,01,02,03,05,0 Oleic acid2,0-0,52,03,03,0 Oil new oil PN-6SH14-5,0141515 Technical carbon PM-UO654050556570 Diphenylolpropane ED-81,00,30,51,02,0.3,0 epoxy resin The prepolymer of glycerin -0,50,50,50,50,5 Table4 Voltage at 300% elongation, MPa9.7 3.0 9.6 9.8 9.9 Conventional tensile strength, MPa NU 16.9 8.5 17.6 17.7 18.0 14.8 Table3 13.0 Indicators  Mixed examples 8 I 9 I 10 I II 1 12 D 13 Relative extension , % Tear resistance, kN / m Multi-cut resistance at 100% elongation, kT Crack resistance up to 550 465 470 465 350 41 77 78 76 60 25,125 133 120 45