The rubber mixture based on chloroprene rubber for the manufacture of hose membranes cable

 

(57) Abstract:

Usage: the invention relates to rubber mixtures used in the manufacture of hose cable jacket. The inventive rubber mixtures include /wt.part/: chloroarsine rubber 100,0; zinc oxide 3,0 - 10,0; magnesium oxide 3,0 - 10,0; 5-cyclohexylamino-1,3,5-triazine-2-tion of 0.1 - 2.0; antioxidant 0.5 to 1.5; plasticizer 5 - 0,20; mineral filler 20,0 - 100,0, organic filler of 20.0 - 60.0 sec. The invention allows to obtain coatings of cables with high resistance to swelling in the environment of oil, in combination with reduced toxicity in the manufacture of the mixture. 3 table.

This invention relates to a cable industry, in particular, to the development of rubber based on polychloroprene rubber for the manufacture of hose shells of marine and mining cables.

Known rubber mixtures based on chlorosulfonated polyethylene used, in particular, and for the manufacture of hose membranes containing as an accelerator of vulcanization of atlantiscasino /1/. The vulcanizates obtained from these mixtures, have poor physical and mechanical properties.

Known Rusanovka, magnesium oxide, a vulcanization accelerator, captax, protivostaritel, plasticizer, mineral and organic fillers /2/. However, the known rubber mixture contains import of a vulcanization accelerator atlantiscasino (rodann C-62), which is not produced by the domestic industry, and in addition, currently the vulcanization accelerator is not recommended for use in industry because of the high toxicity and Carcinogenicity /3/.Also, the rubber mixture has a high shrinkage and low speed spray with poor surface quality during extrusion and not enough high resistance to swelling in oil one of the main indicators for assessing the quality of these shells. The task was to create a rubber compound for the manufacture of hose sheath for marine and mining cables with high resistance to swelling in the environment of oil, combined with a decrease in toxicity of the rubber mix in its manufacture.

According to the invention, the rubber mixture based on chloroprene rubber, including zinc oxide, magnesium oxide, a vulcanization accelerator, an antioxidant, a plasticizer, mineral and organic fillers, as accelerator Volkov, mass.h.

chloroprene rubber 100,0

zinc oxide 3,0 10,0

magnesium oxide 3,0 10,0

5-cyclohexylamino-1,3,5-triazine-2-tion of 0.1 to 2.0

antioxidant 0,5 1,5

the plasticizer 5 20,0

mineral filler 20,0 100,0

organic filler 20,0 60,0

As chloroprene rubber used rubber sour regulation (Mr TU-6-04-161-63).

As the vulcanizing system using metal oxide system consisting of zinc oxide and magnesium oxide.

Zinc oxide (GOST 202-62) white powder (Tpl.1800oC, the particle size of 0.11 to 0.30 MK, purity 99.8% d 5,47 5,66.

Magnesium oxide (GOST 844 41) fine or ultrafine powder (Tpl.oC), d 3,13 3,65. As protivostaritel use connections amine type, in particular phenyl-naphtylamine (Neeson D, GOST 39 66) powder from light brown to gray (Tpl.104 108oC), d 1,23.

As plasticizers used hydrocarbon compounds, such as stearic acid and paraffin, aromatic ester, such as dibutyl phthalate.

Paraffin (GOST 784 53) in the rubber industry use peeled technical paraffins.

Sea with 8,728 66) ester n-butyl alcohol and orthophthalic acid.

2-Mercaptobenzthiazole (captax, GOST 739 41 powder yellow Tpl.172 174oC, while performing the role of a vulcanization accelerator and a chemical plasticizer. Ethylendiamine (rodann C 62, the product Czechoslovakia) crystalline powder white or yellowish, Tpl.383oC with low odor amine, d 1,42 1,43.

As use mineral fillers (chalk, kaolin) and organic (carbon black) fillers.

Chalk natural enriched GOST 12085 66.

Kaolin (GOST 3314 63) to a particle size of 5 microns, a pH of 7 to 8.

Carbon black mark P-803 (GOST 7885 68). 5-cyclohexylamino-1,3,5-triazine-2-tion has the structural formula powder white, Tpl.168 170oC. the Product is obtained according to known methods described in literature /4/. The main method of synthesis of substituted hexahydro-1,3,5-triazine-2-thiones is the condensation of thiourea or urea with aldehydes and ammonia or primary aliphatic amines.

The elemental composition is given in table.1

The invention is illustrated by examples.

On a laboratory roll mill to prepare rubber compound whose composition is given in table 2. For comparison made investigatea on cable factories in the manufacture of rubber stamps EE-40 (RD 16.168-84). Technical properties of rubber compounds and physicochemical properties of vulcanizates based on them check in accordance with GOST: 10722-76, 12585-84, 270 75, 408 78. The results of the test mixtures and rubber are shown in table 3. As can be seen from table 3, when the content in a mixture of 5-cyclohexylamino-1,3,5-triazine-thione in an amount of 0.1 to 2.0 mass.h. 100 mass.h. rubber processing properties of the rubber compound significantly improved compared with the known mixture. So, the Mooney viscosity after 5 minutes of plasticization on rollers is 47 35 conditional Mooney units instead of 50 for the known mixture. Spacemost these samples increases to 2.2 3.0 cm3/s instead of 2.1 cm3/s for the known mixture. By reducing the content of triazinone below 0.25 masses.h. there is a decrease in the strength property of the vulcanizates compared with the known mixture while retaining technological properties at the level of the known mixture.

It should be noted that when the content of triazinone in the range of 0.25 to 2.0 mass.h. a decrease in the shrinkage of 8 to 10% compared with the known mixture and improving the surface quality of the extruder ("smooth" in all samples containing trasition compared to "slightly rough" that one my mixture (see table.3).

It is important to note that when the content of triazinone 0.5 to 2.0 mass.h. decreases the optimal time of vulcanization of the rubber mixtures in comparison with the known mixture and significantly increases the maximum speed of vulcanization.

Compared with rubber from the known mixture, rubber with trasitional has oil resistance (smaller decline in conventional tensile strength and relative elongation after swelling in the engine oil).

When the content of triazinone in the amount of 0.5 to 2.0 mass.h. increases frost resistance of rubber as compared with the tires of the known mixture.

The rubber mixture based on chloroprene rubber for the manufacture of hose cable enclosures containing zinc oxide, magnesium oxide, a vulcanization accelerator, an antioxidant, a plasticizer, mineral and organic fillers, characterized in that it contains as an accelerator of vulcanization 5-cyclohexylamino-1,3,5-triazine-2-tion, as antioxidant amine antioxidant in the following ratio, wt. h

Chloroprene rubber 100

Zinc oxide 3 10

Magnesium oxide 3 10

5-Cyclohexylamino-1,3,5-triazine-2-tion of 0.1 to 2.0

Amine spruce 20 60

 

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