SU737417A1 - Butadienenitrile rubber-based rubber mixture - Google Patents

Description

The invention relates to the rubber industry, in particular to the development of a vulcanizable rubber compound based on butadiene rubber. A vulcanized rubber compound based on butadiene nitrile rubber is known, which includes a filler, a vulcanization activator, an anti-stripper, a vulcanization accelerator, a vulcanizing agent, and a plasticizer — ester or sebacic esters. However, the rubber from such a mixture is characterized by insufficient fatigue endurance, heat resistance, tear resistance and hardness, and the mixtures are characterized by low technical and economic indicators. The purpose of the invention is to increase fatigue endurance, heat resistance of bones, tear resistance and hardness of rubber from this mixture, as well as to improve the technical and economic indicators of the latter. The goal is achieved by the fact that a vulcanized rubber compound based on butadiene nitrile rubber, including a niopnetel, a vulcanisation activator, an antioxidant, a vulcanizing accelerator, a vulcanizing agent and a plasticizer, contains waste acid recovery components that are removed from the acid recovery component of the procedure for cleaning the volatilization agent, plasticizer and plasticizer. benzene with 1 component, mass: Butadenentryl rubber (SKN) 100 Filler 5O-100 Vulcanization activator 5-2O Anti-rust Preheater 0.5-2.5 Us vulcanizing agent: O, 5-2.0. Vulcanizing agent, 0.5-3.0. Specified Shlast | f1kator 10-35. The plasticizer used is previously separated from the contained

kisps know the habitat, ---: - - Smopu is protected from free water, which can be put back into production for further use .......,, -, -., ..;,

The elemental composition of the resin DAC,%; H 306, C 64.68; C 1O, 04; About 22.76.

The chemical composition of KGP,%

Aromatic and aliphatic sulfonic acids-.

-i

Copolymers of indden with thiophene, thiophene with styrene, thiophene with piperylene. .

(cis- and trans-forms) other polymers40-50

High molecular weight compounds:.

Dineni p1,8-4,5

Ash - 0.1-0.3

Water 8-10

. ,, ..

. Density at 20 ° С - 1.1-1, Зкг / 6mI Molecule weight is 170-330. The presence of sulfur-containing compounds and the organ sulfoxis from the resin KSR resin contributes to the cross-linking of the caustic, 5 to increase the hardness of vulcanisates - ™

DAC resin is introduced into the {zeznoyo yme by ordinary methods. It combines well with rubber. -.

Example. In the rubber composition, mass.h. SKN-26 10O; stearin 1.5; zinc oxide 20; carbon black {pM-75) 70; neozoi 1.5;

stabilizer product 4010-1.5; ammonium rodanist 2.15; sulfur 0.75, vvoshyR 10 mas, h. dibutyl phthalate (DBP) OR DAC resin.

Vulk; the animation is carried out in a press at a temperature of 151 ° C for 25 minutes.

The properties of the vulcanizates are presented in table. one.

Example 2. In the rubber composition of the composition, wt.h .: SKN-26 100; stearin 1.5; zinc 5.0; technical carbon (PM-5O) 20 and PM-100 20

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neozone and 1.0; sulfur 2.5; captax 0.65, 25 wt.h. DAC or DBP resins. The vulcanization was carried out in a press at 151 ° C for 25 minutes. Properties are presented in table. 2

PrimerZ.V rubber mixture composition, wt.h. SKN-26 100, stearin 1.5, technical carbon PM-50 20, PM-10r 20, nerzine D 1.0, are introduced instead of a plasticizer (DBF-25.0) and a vulcanizing system; (zinc oxide 5.0; sulfur 2.5; captax 0.65) DAC resin 33.15. Vulcanization is carried out in a press at a temperature of 151 ° C for 25 mip.

Properties are preset in the table. 3

Example 4, In the rubber mixture 57-5006 composition, oils: SKN-; Y6 100 ovds Shgak 7, O, S, M-dithiodiMorpholine 1.5, sulfenamide C 1.0, thiuram D 1,3, K) -nitroeodiphenylamine 1.0, diafen OP 2P, nickel diethyldithiocarbamate 1.0, stearin 1.0, ceresin 80-3.0, chalk 20.0, carbon black PM-75 25.0 and PM-50 25.0 were added 12 masses . h. DAC or DBP resins.

The vulcanization was carried out in a press at 143 ° C for 30 in.

Properties are presented in Table. four,

EXAMPLE 5. Using the method of a mathematical planning of the experiment, the GVG activity of the DAC resin is determined. . ,,

The experimental data (plan of the experiment 2) are presented in Table. five.

As a response function studied

Y - weight swelling in wv-xylene, 24 h, in%.

Resheiyo; 1®endressing regression indicates that the DAC resin is a self-structuring

agent, eliminating the need for the use of a cbd vulcanizing system for SKN.

The introduction of oMtci of zinc into the mixture reduces the activity of the resin, captax does not directly affect, the amount in the mixture of Mo dates can be significantly reduced and even practically reduced to zero. Vulcanized compositions containing DAC resin differ from those of DBP and conventional vulcanizing systems, which have improved retinal endurance, heat resistance, increased tear resistance and hardness. Application

5.7374176

CCP resins allow to simplify the recipe), expands the areas of application of waste products and the composition of the rubber composition (chemical-chemical production, not about exclusion of the activator and accelerating practical use.

Comparative properties of the properties of vulcanizates containing DBP and DAC

.Table.

Comparative Dasho Ryo 1nova

compositions and wupkaizatas, sop zhaishkh DBF CAF

, .T a b p p a. 2

6.5

eleven

0.83

V Oh, 80 K. 0.30 0.36

temperature 0 С

aggressiveness I I 1

I Evil (3: 1) 1 I

raediru

TM-2

Carrera composition Comparative data on properties of vulcanizates

Endurance fatigue

before destruction (thousand cycles)

with 200% wap

The coefficient of resistance to heat-sous aging, 72 h X

  . -

Resistance Temperature Factor. 100 ° C

Tear resistance, kgf / cm

Continued table. 2

0.28

Oh 47

H 0.52

0.76 0.32

0.59

times / h

1.0

1.0

ff

TO,

0.98 1.0

0.94 1.0

0.88 1.0 0.75

0.76

b

0.78 0.78

45 60

56

74

0.35

0.32

Table 3

53

45

60

Compare the properties of 1zupkayizatvv containing as a plasticizer DBP and smopu DAC

Residual deformation at a constant compression ratio of 25% (4),% i.

The relative changes in aging rate,% (X 70 h) in co-octane:

hardness change

strength change in fviacjie

change in hardness change in strength

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Continued table. 3

Table4

44

38

-8 0.63

About 1

eleven

Experiment plan

Claims (1)

1. Encyclopedia of Polymers, Vol. 2, M., Sovetsk Encyclopedia, 1974, p. 626, (prototype).