SU1370121A1 - Rubber stock - Google Patents

Abstract

The invention relates to the rubber industry, in particular to rubber compounds based on diene rubber, and is intended for rubber and rubber cord products operating under conditions of elevated temperatures and dynamic loads. The invention allows to increase the resistance to heat aging and tearing, fatigue endurance, bond strength with rubber cord from this mixture, as well as to improve its technological properties and working conditions due to the use of phenolic resin (AC) obtained as a modifier of amine salt by alloying VAT residue production of polyethylene polyamine and phenolic resin in the ratio of 1: 1-5. The mixture according to the invention includes, wt..ch .: diene rubber 100; sulfur 2–3,2; zinc oxide 3-5; vulcanization accelerator 0.6-3.0; softener 1.5-25; antioxidant 0.1-5.0; carbon black with a specific geometric surface 95-102 m / h 25-100; AC 0.2-3.0. 6 tab. (L

Description

00

The invention relates to rubber industry, in particular to rubber mixtures based on diene rubber, and is intended for rubber and rubber-cord products operating under conditions of elevated temperatures, dynamic loads.

The purpose of the invention is to increase the resistance to heat aging and tear, fatigue endurance, strength of bonding with rubber cord from this mixture, as well as to improve its technological properties and working conditions.

The invention is illustrated by the following examples.

Example 1. The rubber mixtures of the composition according to Table 1 are prepared in a laboratory rubber mixer with a rotor speed of 30 rpm and a mixing chamber volume of 2x10 m at 130 + 2 ° C for 5-6 minutes. Sulfur is introduced into the second stage on laboratory rollers at a roll temperature of 50-60 ° C. The mixtures are vulcanized in an electric pressure at 143 + 2 ° C. The modifying additive is introduced together with bulk ingredients.

The proposed blends contain SKMS-ZOARKM-15 butadiene-styrene rubber as rubber; a vulcanization accelerator - di (benzthiazolyl) disulfide (altax); mchchitel - stearic acid; antioxidant - phenylnaphthylamine (neozone D); napol nitel - furnace carbon black with a specific geometric surface of 95-102 (PM-SO); vulcanization activator - zinc oxide; vulcanizing agent - sulfur; modifier - amino salts of phenolic resins of the general formula

CH, CH, W, .NHj

RI

R, alk C, - Sgo;

R4 -CH; -CHjOH;

n 1-10.

Aminosols of phenolic resins are obtained by fusing a bottom residue of polyethylene polyamine production

five

0

b

five

0

0

0

five

(PEPacub) and phenolic resin with a ratio of 1: 1-5 at 150 + 5 ° C for 20 minutes.

The use of smaller amounts of phenolic resin (for example, 1: 0.5) leads to the production of a fusion of a viscous consistency, which complicates its dosing and does not exclude the volatility of the polyamine introduced in excess, which leads to deterioration of working conditions. In addition, with this ratio, not all PEPacub reacts and, the remaining unreacted, reduces the adhesion properties of rubber compounds.

The use of large dosages of phenolic resin (for example, 1: 6) is impractical because the excess resin is a ballast that reduces the effectiveness of the modifier.

The bottoms residue produced by polyethylene polyamine, PEPacube, is a mixture of oligomeric polyamines in a molar mass of 400. This glycerol-like dark colored liquid is used as a modifying additive. Phenolic resins are fragile pieces ranging from yellow to brown. I

In example 1, in the proposed mixture, the amino salts of phenol from the mole obtained by fusing PEPacube and Amberol ST-137 resin are used in a 1: 1 ratio.

Mixtures 1 and 2 are known; mixes 4-7 - offered; mixtures 3 and 8 - illustrate going beyond the modifier dosage interval.

Properties of the mixtures of example 1 are given in table 2.

Example 2: The mixtures of the composition according to Table 3 are prepared analogously to Example 1.

Mixtures 1 and 3 are comparison mixtures containing a known modifying additive; mixes 2 and 4 are offered.

Properties of the mixtures are given in table 4.

EXAMPLE 3 A mixture based on isoprene rubber SKI-3 of the composition according to Table 5 is prepared as in Example 1.

Mixture 1 is a comparison blend.

In the proposed mixtures (2-5), N-cyclohexyl-2-benzthiazolyl sulfene-MID (sulfenamide C) is used as an accelerator; mcchitel - rosin, special bitumen, petroleum oil PN-6, PEID, antioxidant - phenyl-p-naphtylamine (neozon D); N-isopropyl-N-phenyl-p-phenylenediamine (Diafen OP).

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In addition, other additives are used — the molecular complex of hexamethylenetetramine and resorcinol (RU-1) N-nitrosodiphenylamine (NDPA). ,

As a modifier in the example, the amino salt of the fiola resin is used. obtained by fusing PEPacub and resin octofor N in the ratio 1: 2.

The properties of the mixtures are given in table 6.

Claims (1)

Invention Formula Rubber mixture based on diene rubber, including sulfur, zinc oxide, vulcanization accelerator, softener, antioxidant, carbon black with a specific geometric surface 95-102 and modifnka- -CHj; -OSNg-; -CH ,; CH2N alk С, - Cto RI  Zinc oxide RO —CH; -Sh; -CHjOH; p 1-10, in the following ratio of cats, wt.h .: Diene rubber Sulfur A torus, characterized in that, in order to increase resistance to heat aging and tearing, fatigue endurance, strength of bonding with rubber cord from this mixture, as well as improving its technological properties and working conditions, the rubber mixture contains amino salts of phenolic resin as a modifier formulas: ns nn nn nn n Formulations of rubber mixtures based on butadnenmethylstyrene rubber SKMS-30 ARKM-13 using amber salt of phenolic resin Amberol ST-I37 Butadiene methylstyrene rubber SKMS-30 ARKM-15 Stearic acid Zinc Oxide Sulfur Altax Neozon D Technical carbon PM-100 VAT residue of polyethylenepolyamine PEPacub production 100,0100100 1,51,51,5 5.05.05.05. 2,02,02,0 3,02,03,0 0,10,10,1 40.0AO, O40.0 40.0, JSC, O 40.0 40.0 0,3- - Vulcanization accelerator M softener Antioxidant Carbon black with specific geometry surface 95-103 MVr Aminosols phenolic resin Table I 40.0 VAT residue of the regeneration stage of diethylene-glycol Aminosol phenolic resin Amberol ST-137 F eiko-m "x" nncheskma lok "eatepi p" 9SH1 l butadienemetlstyrolnogo kazgchuk SHNO-30 ARKN-15 with the use of ammoniapn "nolyuy resin" mbarol 8T-1E7 Stress at elongation of scientific research institute 300Z, MPa Conventional strength at rahrshe, MPa 25 С after aging 48 h prn SO Relative lengthening, Z after aging at 100 ° C Radial resistance, kN / n Resistance to repeated stretching of the elongation 200Z, thous. Cycles Strength of bond with latex-impregnated cord (SKD-1 + FOP) according to the H-method, kN / m: Cord 22c 25 ° C 120 C Cord 23cnts 25 ° С | 20 ° С Cord 29л18 (metal cord) 25 ° С 120 ° C 6.4 9.37,88,19,29,39,59,7 23.4 20.8Id, 520,522,722,220,916.8 14,08,514,816,916,715,28,8 470 580570590610600590570 340280360380390380340 45.0 56,053,159,060,260,159,856.0 33.0 30,019,836,645,545,840,430.2 9.59,89,810,912,012,112,010,5 5.65,65,65,75,85,95,85,7 10,310,810,811,311,712,011,810.9 4,84,74,74,84,95,04,94,8 12,514,314,017,121,621,921,420,1 6,27,26,810,510,810,810,69,8 Continued table. one 0.1 0.21.01.63.05.05 table 2 Scorch on Flour at 130 C, min15 Munn viscosity at 100 ° C, units 60 Table 3 Recipe rubber mixtures based on butadiene methylstyrene rubber SKMS-30 APKM-I5 using the amino salt of phenolic resin Amberol ST-I37 Butadiene methylstyrene rubber SKMS-ZO ARKM-15 Stearic acid Zinc oxide Sulfur Altax Neozon D Technical carbon PM-100 VAT residue production of polyethylene polyamine PEPacub 0.3 Aminosol phenolic resin Amberol ST-137 20 20 1818 17 15 55 58 5860 60 63 100 23.0 5.0 2.0 3.0 5.0 100.0 0.3 100 25.0 5.6 2.0 3.0 5.0 100.0 1.0 Table 4 Physico-mechanical properties of rubbers based on butadiene methyl styrene rubber SKMS-ZO ARKM-15 using amino salt of phenolic resin Amberol ST-137 Table 5 Recipe breaker rubber mixtures based on rubber SKI-3 using amino salts of phenolic resin octofor N Cis isoprene rubber SKI-Z100,0100.0 100.0 100.0 100.0 Sulfur 3,23,23,23,23,0 Sulfenamide Z0,60,60,60,60,6 Zinc Oxide5,05,05,05,05,05 Stearic acid2,02,02,02,02,0 Rosin2.0-1,51,51,5 Spetsbitum4,04,04,04,04,0 Oil PN-65,05,05,05,05,0 Neozone D1.01.01.01.01, 0 Diafen FP1,01,01,01,01,01,0 RU-11,01,0NDFA0, 70,70,70,70,7 PEND1,01,01,01,01,01,0 Technical carbon PM-YuO - 55,055,055,055,055,0 Aminosol Octophore N-1,00,30,71,0 Properties of belt rubbers containing aminosols octofor N Table 6 Relative lengthening,% 550 5AO 550 550 m, 15 20 29 60 52 50 49 58 57 Resistance to repeated stretching at elongation of 200%, thous. CYCLES 14.6 Continuation of table 6 570 25 27.5 52 55 58 60 28.5 22.9 27.6 30.1