SU910673A1 - Process for preparing rubber stock - Google Patents

Description

I

The invention relates to the rubber industry, in particular to methods for producing rubber compounds.

A known method for producing a rubber mixture is made by mixing carbon chain rubber with soot, vulcanizing agents, softening agents and crushed rubber crumb passing through a sieve with a 0.25 mm side sieve, the latter being introduced together with soot 1}.

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Rubber from a known mixture have poor petvfnthe physical physical and mechanical properties.

There is also known a method for grinding rubber mix by displacing rubber with carbon black, vulcanized 1 group, softeners and crushed rubber crumb passing through a sieve with a 0.25 mm cell side, while rubber crumb is introduced into the mixture at the end of the mix. , after the introduction of soot 2}. ,

The disadvantage of this method is that the rubbers from this mixture do not have

Reasonable strength at stretching, tear resistance and abrasion resistance. In addition, the cutting mixture obtained by a known method may contain rubber crumb with a particle size of not more than 0.25 mm for improper leveling of unwanted strength properties.

The purpose of the invention is to increase the tensile strength, the resistance to crushing and the resistance to tearing of slaughter, as well as the increase in the efficiency of the crumb rubber.

The goal is achieved by the fact that by the method of obtaining a rubber mixture by mixing

15 rubber with technical carbon, close to the advising, group, soft in rubber rubber EoB, rubber crumb is pre-processed together with 5-60 May. % vulcanizing; groups

20 under shear strain conditions. -1On the temperature of 4О-1ОО С, and then the processed rubber crumb in the amount of 1-4 O May. hours at 100 mach. the rubber is introduced into the mixture after the introduction of technical perpetrator into it. Example I. Rubber mixtures of the compositions given in tab. 1, according to a known method. Mixture 1) by introducing crumb rubber with a particle size of less than 0.5 mm into the rubber mixture. Mixture 2 is made by the proposed method. Rubber crumb before the introduction into the mixture is treated together with the part. Vulcanizing; groups under conditions of shear deformations of 10 s and surface renewal at a temperature of 40 ° C for 10 min in the ratio of NII May. H. Crumbs 0.5 May. h. 1 group curing (sulfur and santokyur in proportion 2: O, 7). The treated rubber crumb is introduced into the rubber mixture after the distribution of carbon black. The mode of manufacture of rubber mixtures is the following, min; Rubbers, zinc oxide sankhokyur, stearin, rosin, 4O1O NAO, PN-6SH, 1/2 carbon black PM-103 1/2 carbon black PM-10O5 Shredded vulcanizer7 Unloading of mixtures9 / Cooling of the rubber mixer 2 min. Processing mode on rollers, min: accepted mixtures O, sulfur loading 3, removal of mixture 7. Vulcanization is carried out in electric pressure at 143 ° C for 30 minutes. Fi aiko-mechanical properties of rubber presented n tab. 2. PRI mme R 2. Rubber mixture composition is given. 1, is manufactured according to the known and proposed methods as follows: rubber crumb before being introduced into the mixture is treated together with a part of the pasteurized group under shear deformation conditions of 10 C of surface renewal at 4Cfc in a ratio of 100 May. H. Crumbs 2 May. including vulcanizing group (sulfur and santhokyur in a ratio of 2: 0.7). Processing time U min The treated rubber crumb is introduced into the rubber mixture after the distribution of technical nperod. Processing mode on rollers, min: accepted mixtures O, loading of sulfur 3, removing mixture 7 Vulcanization is carried out in an electric press at 143 ° C for 30 minutes. The physicomechanical indicators of the rubber mixtures are given in Table. 3. PRI mme RZ. In rezinmesigel. "Zinov next eoetava mixture, e. H .: SKI-35o, SKD30 GS, GS-SKMS ZOARKM152O, TOE Sera2,2O Sulfenamits TS1, tsinka5 oxide GS, GS Stearin1,50 Kanifol2,00 Resin styrene-inaenova 4 GS Mikrovosk3, OO Oil PN-6SH14, OO 4010NA1, OO Quinol ED2, OO Phthalic angiariO, 5O Technical carbon PM-10055.0 Chopped eulcanizate from damped tire covers with a particle size of at least 0.8 mm, not treated, 1 O, OO Chopped elucidated tires with a particle size of not less than 0.8 mm, not processed, 1 O, OO Chopped volcanizer with a particle size of not less than 0.8 mm, not treated, 1 O, OO Chopped volcanizer with a particle size of at least 0.8 mm, not treated, 1 O, OO Chopped volcanizer with a particle size of not less than 0.8 mm, not treated, 1 O, OO a particle size of not less than 0.8 mm, pre-treated with 1O, OO Mixture 1 — crushed vulcanizate from estno spooobu not formed culated. Mixture 2 — crushed vulcanized material, is introduced into the mixture and treated with este with a part of vulcanizing corpses under the conditions of deformation of the surface renewal at O®C, in accordance with the reduction of 10 ° May. including ground vudanizata May 2. h. voa aniducite group (sulfur and sulfenano C in proportions 2 1) for 10 min. Mixture 3 - crushed pepper vulcanate by introducing the mixture into the mixture together with part of the vulcanizing uppa under conditions of shear information of surface renewal at a ratio of 1OO May. including ground vulcanizer 2 May. including volanizing group for 3 min. The mode of making rubber compounds in rubber is the lowest, min; Rubbers, eulfenamio U, zinc oxide, stearin. qunifope, styrene-inain resin, microscopic Prscuct 40 to NA, quinol ZD, phthalic angiaria, PN-6SH, 1/2 carbon black PM-100 1/2 carbon carbon PM-100 Ground vulcanizer Unloading 9 Cooling of sawdust 11 Work processing on wales : Admission of the mixture to O. Introduction of sulfur3 CjaeM mixture7 Vulcanization is carried out in an electric press at 143 C for 30 minutes.

Component 910 5 10 fS 73-6 Physicomechanical data are listed in Table 4. As described in the following examples, rubber compounds, prepared by the proposed method, have better physicomechanical properties (co-wear, strength, tensile strength, resistance Ist | fniyu), than made by a known method. Improvement of the physicomechanical properties of the slaughter containing crushed vulcanizer is achieved due to the fact that during the treatment of crumb rubber, the vulcanizing agent is grafted onto the surface of the crushed wax, which results in a better co-vulcanization of the particles of the crushed vulcanizate with the matrix after its introduction into the mixture. Table 1

C is-isoprene oy to au chuk SKI-3

Tsis-di wine SCD rubber

Butadiene styrene rubber SKMS-ZOARKM-15

Sulfur Santokur Zinc Oxide Stearin CannfoLe Oil PN-6SH Product 4010

Technical carbon PMI ground vulcanizer particle size meneo 0, not processed

Crushed vulcanizer with a particle size of less than 0.5 mm, pre-treated but processed

5О, 00 ЗО.ОО

2O, OO

2.20 1, ОО 5, ОО 1,5О

2.00

5, OO

1, OO

55, OO

5, OO

Voltage at ZOO% - “Connection” at ZOO% utilization, M Pa

Strength at stretching, MPa

Relative elongation at break,%

Relative residual yield 1%

Resistance to razir, kN / m

Hardness TM-2, sm. ea. Rebound elasticity,%

Abrasion, cm / kw-h, machine Truss ate

T a b l and c a 3

280

Claims (2)

200 The formula was invented by the use of rubber with technical carbon, vulcanizing group, softeners and rubber cover, in order to increase the rubberiness and abrasion resistance of rubber from the mixture and size increase is used | rubber crumb, rubber crumb preavaritesh but treated together with 5-6O May. % of the vulcanizing group under conditions of stitched cements with a temperature of 4 ° -1 ° C ° C, and then treated rubber crumb in an amount of 1-4 ° May, hours at 100 May. the rubber was introduced into the mixture after the introduction of a technical carbon. Sources of information taken into account in eco-pertise 1. Production of tires, rubber and asbestos technical manufacturing, 1974, N 5, p. 11-12. 2. USSR author's certificate N 59O316, cl. With O8J 3 / 2O, 1977 (prototype).