The rubber mixture

 

(57) Abstract:

The invention relates to the rubber industry can be used in the production of household appliances, medical devices, sporting goods. In the rubber mixer to prepare a mixture of the following composition, wt.h.: butadiene-styrene rubber, 40 - 60, synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubber 40 - 60, sulfur 1.5 to 3.0, zinc oxide 3 and 5 stearic acid 3, 5 - phenyl-naphtylamine 0,4 - 1,0, 2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL) 0,1 - 1,0, industrial oil 25 - 30, azodicarbonamide 3,5 - 4,5, methyl ester p-hydrazinophthalazine acid of 0.8 - 1.2, calcium carbonate, 10 to 20, the silicon dioxide 7 - 12, carbon black 3 - 10, di(2-benzothiazolyl)-disulfide of 2.0 to 2.4. Products according to the invention have superior cushioning, sound-proof, sealing properties. table 2.

The invention relates to the rubber industry, in particular to the rubber mixtures, and can be used in the automotive and chemical industry in the manufacture of household appliances, medical devices, sporting goods.

Known rubber mixture containing butadiene-styrene rubber, sulfur, zinc oxide, loin of calcium, silicon dioxide and astika the

A disadvantage of the known technical solution is a great complexity and significant energy costs in the manufacture of products of the above rubber compound as the curing process of two-stage and requires a complicated and traumatic production equipment.

In addition, the resulting products have inappropriate physical-mechanical properties.

This is due to the fact that the vulcanization products is carried out in two stages. The first stage of vulcanization is carried out in a vulcanizing press at a temperature of t = 150oC for 7 to 20 minutes, and the second stage is when the product in the pot in the "free state" at a temperature of t = 150 - 155oC and the steam pressure in the boiler up to p = 4 ATM. within 30 to 40 minutes.

Known rubber mixture based on a combination of butadiene-styrene and synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubbers, including sulfur, zinc oxide, stearic acid, filler and accelerator (RF patent N 2044006, class C 08 L 9/06, 1995).

Rubber compound protected by patent N 2044006, the composition of the components closest to the proposed invention and is selected as a prototype.

However, products polychem depreciation, sound insulation and sealing.

The technical result of the invention is to provide a rubber compound that reduces the complexity and energy costs in the manufacture of products, by providing one-stage vulcanization process and simplify the required production equipment.

In addition, the products produced from rubber, but have superior cushioning, sound-insulating, sealing and decorative properties.

The invention consists in that the known rubber mixture based on a combination of butadiene-styrene and synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubbers, including sulfur, zinc oxide, stearic acid, filler and accelerator further comprises feilner-naphtylamine, 2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL), industrial oil, azodicarbonamide and methyl ester of n-hydrazinophthalazine acid, used as filler, calcium carbonate, silicon dioxide and carbon black, and the accelerator used di(2-benzothiazolyl)disulfide, in the following ratio of components, rubber blend, wt.h.:

Butadiene-styrene rubber is 40 - 60

With the lot - 3 - 5

Phenyl-naphtylamine - 0,4 - 1

2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL) - 0,1 - 1

Industrial oil - 25 - 30

Azodicarbonamide - 3,5 - 4,5

Methyl ester of n-hydrazinophthalazine acid - 0,8 - 1,2

Calcium carbonate - 10 - 20

Silicon dioxide - 7 - 12

Carbon black - 3 - 10

Di(2-benzothiazolyl)disulfide - 2 - 2,4

Using a combination of rubbers, butadiene-styrene and CIS-1,4-branch, Rubezhnoe, Ukraine allows to obtain a sufficiently high technological properties of raw rubber mixtures, such as spiritualist, value.most and plasticity.

Sulfur, zinc oxide and di(2-benzothiazolyl)disulfide used in the rubber compound, respectively, as a vulcanizing agent, activator and accelerator of vulcanization. Calcium carbonate, silicon dioxide and carbon black used in the rubber compound, respectively, as inert and active fillers. In addition, the silicon dioxide provides the products to the desired frame.

Stearic acid, phenyl-naphtylamine, 2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL) and industrial oil used in the rubber compound, respectively, as a dispersant, anti sinoway mixture increase the life of the product, so as prevent aging, and industrial oil provides softness and elasticity of the structure of the product.

Azodicarbonamide and methyl ester of n-hydrazinophthalazine acid used as pore-formers, and the use of two pore in the rubber compound allows the vulcanization process in one stage, which in turn reduces the complexity and energy costs in the manufacture of products.

The rubber mixture is prepared as follows.

Butadiene-styrene branch, Rubezhnoe, Ukraine and synthetic rubbers are loaded in a rubber mixer and mixed with other components, and silicon dioxide, calcium carbonate, carbon black, industrial oil injected two reception, and sulfur as the vulcanizing agent is injected directly before unloading rubber compound.

The total mixing time 10 - 15 minutes.

The obtained rubber mixture is discharged from the mixer and conveyer filed on mixing rolls for additional mixing and listomania, the temperature of the rolls rolls t = 35 - 45oC.

The leaves of the rubber mixture is cooled in air is esenovoy mixture is not more than 30 days.

The vulcanization products obtained from the rubber mixture is carried out in a hydraulic vulcanizing press at a temperature of t = 165 3oC for 12 - 20 minutes at a pressure of 120 to 150 ATM.

The rubber compositions of the mixtures are given in table 1.

As filler in rubber compounds prototype used kaolin in the amount of 40 wt.h.

Physico-mechanical properties and performance of products from well-known rubber compounds and rubber mixtures according to the invention are shown in table 2.

As can be seen from table 2, the best set of physical-mechanical properties and performance are products obtained from the rubber mixtures produced according to the invention. The values of the indices 1, 2 and 3 rooms mixtures differ slightly, which determined the choice of the optimal number of components in the rubber mixture.

Industrial applicability rubber compounds made according to the invention, provided with low labor costs and low energy costs in the manufacture of products, by providing one-stage vulcanization process and simplify the required production equipment and good amortisation in the industry.

The rubber mixture based on a combination of the best choice and synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubbers, including sulfur, zinc oxide, stearic acid, filler and accelerator, characterized in that the rubber mixture further comprises a phenyl-naphtylamine, 2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL), industrial oil, azodicarbonamide and methyl ester of p-hydrazinophthalazine acid, used as filler, calcium carbonate, silicon dioxide and carbon black, and the accelerator used di(2-benzothiazolyl)disulfide in the following ratio of components, rubber blend, wt.h:

The best choice rubber - 40 - 60

Synthetic CIS-1,4-branch, Rubezhnoe, Ukraine rubber - 40 - 60

Sulfur - 1,5 - 3,0

Zinc oxide - 3 - 5

Stearic acid - 3 - 5

Phenyl-naphtylamine - 0,4 - 1,0

2,2-Methylenebis(6-tertbutyl-4-METHYLPHENOL) - 0,1 - 1,0

Industrial oil - 25 - 30

Azodicarbonamide - 3,5 - 4,5

Methyl ester of p-hydrazinophthalazine acid - 0,8 - 1,2

Calcium carbonate - 10 - 20

Silicon dioxide - 7 - 12

Carbon black - 3 - 10

Di(2-benzothiazolyl)disulfide is 2.0 - 2.4

 

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