Vulcanicola rubber compound

 

(57) Abstract:

The invention can be used in the rubber industry. The purpose of the invention: improved tear resistance and relative elongation of rubber and comes at the expense of introducing into the rubber mixture based on butyl rubber modifying additives, which represents the viscous mass with a softening temperature 66oC, a needle penetration at 25oC 98 mm, composition, wt. including : acidic hydro-waste sulfuric acid cleaning of diesel oil 100; cremedelacreme fluorine-containing waste product of aluminum fluoride of 0.1 - 0.2; waste memorabilia 4,7 - 4,9, in the following ratio of components, rubber blend, wt. hours: butyl rubber 100; sulfur 1.5 to 2.5; tetramethylthiuramdisulphide 1,3 - 1,5; 2-mercaptobenzthiazole 0,65 - 0,8; zinc oxide 5,0 - 6,0; stearic acid 0.75 to 2,25; carbon black with a specific geometric surface 90 - 100 m2/g 50,0 - 55,0; the specified modifier additive of 0.75 to 2.25. While the vulcanizates have the following characteristics: tear resistance 240 - 250/246 - 257, elongation at break, % 813-825/801-812, the residual elongation, %: 43 - 47/39 - 41 and hardness TM-2, 51-55/58-64 at the time of vulcanization, min 40/120 respectively. table 1.

Known vulcanicola rubber mixture containing the best choice rubber and carbon black in a ratio of 100:145 respectively (rubber Sheet gasket GOST 7338 68) similar.

However, rubber products of this mixture have a high elasticity to bounce component at 20oC 24 28

In the technology of rubber in particulate mixtures as softener use oil and acid tars (Koshelev F. F. Technology of rubber, Hashimis. 1951, S. 139) analogue. Additives improve the dispersion of the ingredients and increase the plasticity of raw mixtures, which facilitates such processes produced as syringe and calender, however, the rubber on the basis of this mixture has a relatively low mechanical performance.

Known rubber mixture based on butyl rubber, including stearic acid, zinc oxide, carbon black, sulfur and vulcanization accelerators (Handbook of reinsta, M. Chemistry, 1971, S. 163) prototype.

However, the rubber on the basis of this mixture has a relatively low physical and mechanical properties, in particular tensile strength, elongation.

The purpose of the invention increase the rupture strength and relative elongation of rubber.

antiradicalic, 2-mercaptobenzothiazole, zinc oxide, stearic acid, and carbon black with a specific geometric surface 90 110 m2/g, further comprises modifying additive, which represents the viscous mass with a softening temperature 66oC, a needle penetration at 25oC 98 mm, composition, wt. h

Acidic tar-waste sulfuric acid cleaning of diesel oil 100

Cremedelacreme fluorine-containing waste product of aluminum fluoride

0,1 0,2

Waste memorabilia 4,7 4,9

in the following ratio of components, rubber blend, wt. h

Butyl rubber 100

Sulfur 1,5 2,5

Tetramethylthiuramdisulphide 1,3 1,5

2-Mercaptobenzthiazole 0,65 0,8

Zinc oxide 5,0 6,0

Stearic acid is 0.75 to 2.25

Carbon black with a specific geometric surface 90 110 m2/g 50,0 55,0

The specified modifier additive 0,75 3,0

For the manufacture of organic additives used acidic tar-waste cleanup diesel oil (TU 3030104 - 87) containing the composition, wt. diesel oil 46 48, acid 44 45, sulfuric acid, 8 9, a waste product of aluminum fluoride crenellations fluoride (TU 6-08-465-81), containing the composition, wt. SiO22O30,81 0,08; SO3and SiO2the rest is up to 100.

The components are mixed at a mass ratio of acidic tar: waste product of aluminum fluoride; waste memorabilia 100: (0,1-0,2): (4,7-4,9). When heated to 45 50oC the acid tar, first add a waste product of aluminum fluoride, and then the waste memorabilia. The mixture is stirred and incubated for 24 h, the pH of the mixture 7. The obtained organic additive, which represents the viscous neutral mass black color with temperature softening 66oC, a needle penetration at 25oC 98 mm, ductility at 25oC 23 cm, introducing a known mixture based on butyl rubber. The mixture is treated in the mill. Conditions of vulcanization and properties of rubber are presented in the table.

Significant differences mixture from the prototype due to the nature of the organic additive functions softener and filler included in the composition of the rubber mixture, which results in the achievement of this goal.

Example. Prepare rubber compound composition, wt. h

Butyl rubber BK-2045 100

Sulfur 2,0

Tetramethylthiuramdisulphide 1,3

2-Mercaptobenzthiazole 0,65

Oxide qi is 2/g 50,0

The specified modifier additive 1,5

In examples 2 and 4 the number of organic additives in the mixture vary the minimum and maximum limits, respectively.

For comparison the table also shows the data of the prototype and the control experiments.

The data show that the rubber on the basis of the proposed mixture have advantages in comparison with the prototype are characterized by high tear resistance, elongation.

Additionally, it is noted that when using organic additives eliminates the negative properties of stearic acid discoloration on the surface of the unvulcanized mixtures involving their stickiness.

Vulcanicola rubber mixture based on butyl rubber, including sulfur, tetramethylthiuramdisulphide, 2-mercaptobenzothiazole, zinc oxide, stearic acid, and carbon black with a specific geometric surface 90 110 m2/g, characterized in that the mixture further comprises modifying additive, which represents the viscous mass with a softening temperature 66oWith, a needle penetration at 25oWith 98 mm composition, wt.h.

Sour Sara is VA fluoride aluminum

0,1 0,2

Waste memorabilia 4,7 4,9

in the following ratio of components, rubber blend, wt.h.

Butyl rubber 100

Sulfur 1,5 2,5

Tetramethylthiuramdisulphide 1,3 1,5

2-Mercaptobenzthiazole 0,65 0,8

Zinc oxide 5,0 6,0

Stearic acid is 0.75 to 2.25

Carbon black with a specific geometric surface 90 110 m2/g 50,0 55,0

The specified modifier additive of 0.75 to 2.25 to

 

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