SU1147576A1 - Method of producing softener for rubber mixtures - Google Patents

Abstract

A METHOD FOR PREPARING A RADIATOR FOR RUBBER MIXTURES by thermal destruction of rubber or pre-cured rubber compound is distinguished by 4% simple, in order to improve the viscosity-temperature characteristics and decrease the temperature of melting of the mixtures, as well as to improve working conditions and protect the environment from heat resistance. in the presence of a solvent at a ratio of the latter to rubber or precured rubber compound 1: O, 1-1, followed by separation of the filler and holding the obtained semi-finished product at 200-400 & am p; deg; C under pressure MO - n / m SU ,,,, 1147576 B 29-B 17/00; C 08 J 11/00 - ENV / tff g Trrvv, .If - A; j; 5: yr; ;; „| 4 ..-.

Description

4 SL

The invention relates to the rubber industry in particular to a method for producing a softener for rubber compounds. The known method of softening agent for rubber mixtures by thermal destruction of rubber or pre-cured rubber mixture, for example, in the presence of a substance connecting seruligkin pi. However, rubber mixtures with Lemme's mcite are obtained by a limestone method that have an unsatisfactory viscosity and temperature characteristics, as well as a high pour point. In addition, the method does not provide normal working conditions and leads to pollution of the environment. The purpose of the invention is to improve the viscosity-temperature characteristics and decrease the freezing temperature of mixtures, as well as to improve working conditions and protect the environment from pollution. The goal is achieved by the fact that according to the method of obtaining dichinizer rubber mixtures by thermal destruction of rubber or vulcanised rubber mixture, thermal destruction is carried out in the presence of solvent. The ratio of the latter to rubber or vulcanised rubber mixture is 1: 0.1-1, followed by separation of the filler and the superior product of the semifinished product at; 200-400 ° С under the pressure of НО 210 Example 1. 333 g (0.5 mach. H of rubber materials - vulcanized waste based on butadiene styrene rubber mixed with 666 g (1 mach. H) of the solvent are subjected to thermal destruction at a pressure of 2.5 "10 n / m. Then, the metal is separated from the obtained thermal decomposition products. In the resulting liquid solution at 320 ° C and pressure of 5, 10 N / O1, filler concentrate is distilled and stabilization distillate which is further evaporated as a solvent in the process The resulting softener has the following characteristic: Tight at, 9513 Refracted index T, pp ° 1.5076 Kinematic viscosity at 100 ° C, cSt12.1 Viscosity index 111 Fractional composition, C: WK398 50% boils 430 k.k.476 Molecular weight376 Group chemical composition , wt.%: Rubber oligomers 9Q, 4 paraffin-naphthenic hydrocarbons5,1 aromatic hydrocarbons 4.5 Sulfur content 1.2 1.2 Pour point, ° C-38 Table 1 presents examples that remove the proposed method. in rubber rubber mixtures based on buien-nitrile (SKN-26) rubber. The results of the test represent: bl. 2. See how the method is presented abl. 3 As can be seen from the table. 3 in case of failure to fulfill the conditions. as indicated in the fbrg of the invention, the process cannot be implemented with the best indicators. Comparative data, showing the advantages of the proposed method to limestone (by prototype), are presented in Table. 4. As can be seen from the table. 4, the proposed code has significant advantages compared with lime; Labor conditions are reduced, reducing equipment corrosion. distillation products at 200-400 ° C from the obtained softener Rubber material used # rubber-based BBC Temperature, ° C: Thermal destruction 200 Filler concentrate and pressure stabilization compartment. Thermal Destruction Filtration Concentrate and Stabilization Characteristics Density at, g / cm Refractive index, front Viscosity is kinematic at 100, cSt Viscosity index Fractional composition, С: 50% boils off Molecular weight Group chemical composition, wt.%; Rubber oligomers Pa afinr-naphthenic hydrocarbons Aromatic hydrocarbons Sulfur content, wt.% Temperature hardening, € 1 БК - butyl rubber, IR - isoprene rubber. IC BSK BSK IK 400 340 350 390 200400350380390., 9.10; ZIO4-10 f 1NO 107 107 Yu1.5; "10 Ic smokers 0.95260.95450.96760.95720.9631 1.5461.50601.54311.50031.5213 7,912,314,512,7t3,4 14596136105129 350402425401413 410436460462 464 450498526502512 356398424403412 86,172,396,789,291,9 9,75,31,25,74,7 4,222,42,15,13,4 1,31,21,41311 -40-38-36-39- 37 rubber, BSK - butadiene styrene

Physico-mechanical properties of rubber compounds

table 2

The number of m gchitel, mac. on 100 ma.ch. rubber

Plasticity Hardness by TM-2 Elasticity by rebound, 20 С,% Tensile strength, kgf / cm Relative elongation,% Residual elongation,%

Heat aging coefficient for 5 days at 100 С

Indicators

0.005 2 0.5 0.5

1111

200400300340 190-420290

Experiences

0.5 1

320 400

Pressure, n / m

thermal destruction

separating concentrate filler and stabilization

Corrosi

equipment

Technological - Non observational lines are strong

Characteristic

Viscosity index 145

Zesttao temperature.

+ 10

Physico-mechanical properties of vulcanizates

5.-10

3.10

2.10

510

2.5.10

0.5-103 1 .10

Rebound elasticity, “I 20 ° С,% 33

26

Tear resistance, kgf / cm 289

262

Relative lengthening,% 720

698

Residual elongation,% 18

20

1.1

1.1

0.82

0.66

Ways

Indicators

Proposed Known Prototype

Tear resistance kgf / cm

70

64

The temperature is brittle. WITH

-58

-48

ti

Claims (1)

METHOD FOR PRODUCING A SOFTENER FOR RUBBER MIXTURES by thermal decomposition of rubber or vulcanized rubber mixture, characterized in that in order to improve the viscosity-temperature characteristics and lower the pour point of the mixtures, as well as to improve working conditions and protect the environment from pollution, thermal decomposition is carried out in the presence of a solvent when the ratio of the latter to rubber or vulcanized rubber is 1: 0.1-1, followed by separation of the filler and holding the resulting semi-finished product at 200-400 ° C under pressure 1'10 '- 2 "10 ⁵ n / m ² . (L Density at 20 ° C, g / cm ³ Refractive index 20 laziness, n _D 0.9513 1.5076 ¹ . ^: 1147576