SU761503A1 - Unsaturated rubber-based rubber mixture - Google Patents

Description

The invention relates to the rubber industry, in particular to the development of a rubber mixture based on unsaturated rubber, and can be used in the manufacture of 5 tires and rubber products.

Famous rubber mixture based on unsaturated rubber, including vulcanization accelerators: -sulfenamide and hexachloroparaxylene (HCPC) £ T |.

The rate of vulcanization of the known mixture is small. You get a rubber with an insufficient degree of vulcanization and insufficient physical and mechanical properties. ^uh

The purpose of the invention is to increase the speed and degree of vulcanization and improve the physico-mechanical properties. rubber compound rubber on. based on __ unsaturated rubber.

This goal is achieved by the fact that the rubber mixture on the basis of unsaturated rubber, including vulcanization accelerators: sulfenamide and hexachloroparaxylene ^, additionally contains £ -caprolactam and / or oligomerization product ол-aminocaproic acid and components, mixtures are taken in the following ratio, weight.h .:

100

0.5-1

0.2-1.2

1-10

Unsaturated rubber Sulfenamide Hexachloroparaxylene

ε-caprolactam and / or · oligomerization product of β-aminocaproic acid

Example 1. The compositions of rubber compounds (parts by weight per 100 parts by weight of rubber) are presented in table. one.

. The mixtures are made in a laboratory rubber mixer (chamber capacity 2, dm ^) according to a 2-stage regime, and caprolactam is administered in the second stage, together with those indicated in the table. 1 common ingredients vulcanizing group. The temperature of the mixtures at the end of the second stage is 90-110 ° C.

Samples to determine the properties of rubber vulcanized at 155 ° C and 185 ° C.

vulcanization kinetics (155 ° С) by stress at 300% elongation and mechanical properties of vulcanizates are presented in Tables 2 and 3.

. As follows from the table. 2 and 3 administration of caprolactam mixed with HCCP (mixtures 2 and 3) increases the rate and

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the degree of vulcanization of rubber, elasticity and wear resistance while reducing hysteresis losses, and there is a tendency to expand the plateau of vulcanization.

Example 2. The mixture is prepared analogously to example 1.

The composition of the tread rubber mixtures (parts by weight per 100 parts by weight of rubber) is presented in table. four.

The properties of rubber compounds and the corresponding vulcanizates (rubber) are presented in table. 5, the data of which indicate that the addition of caprolactam leads to an obvious plasticizing effect during the preparation of mixtures, and in combination with HCCP, due to the synergistic effect, significantly improves vulcanizates such indicators as stress at 300% elongation, elasticity, wear resistance, resistance at high temperatures; vulcanization.

Example 3. The mixture is prepared analogously to example 1 (compositions of parts by weight per 100 parts by weight of rubber are given in

tab. b). Not a caprolactam, but a vat residue (“KO ^ produced by caprolactam, containing mainly the product of oligomerization of β-aminocaproic acid, is introduced in the mixture with HCOPC.

In tab. .7 shows the vulcanization kinetics (Ί55 °) of rubber compounds.

In tab. 8 presents the properties of the pe

rubber compounds and related rubbers. . '

From tab. 7 and 8, it can be seen that the introduction of CO in a mixture with HCCP in all cases also leads to a significant increase in the rate of vulcanization and stress at 300% elongation even with the dosage reduced twice

15 santocura mora. Along with this, the histological loss of rubber decreases and the stability at a vulcanization temperature of 175 ° C increases.

So, rubber from the proposed

2θ mixtures, in comparison with the known ones, are characterized by improved physicomechanical properties, and the mixtures themselves vulcanize at a higher speed with a higher degree of vulcanization.

Table 1 -

Ingredients Rubber blend Known PROVIDABLE .one 2 3

Butadiene styrene rubber (SKMS-30

ARKM-15) 40 40 40 cis-butadiene rubber (scd) 40 40 40 CIS-Isoprene rubber (SKI-3) 20 20 20 Sulfur 1.6 1.6 1.6 Sulfenamide C 0.5 0.5 0.5 Hexachloroparaxylol 0.4 0.4 0.4 £ -Caprolactam - 3.0 5.0 Zinc white 3.0 3.0 3.0 Stearin technical 2.0 2.0 2.0 Rosin 1.0 1.0 1.0

Petroleum oil (PN-bsh) 12 12

eight

5 761503

Continued table. one

Ingredients Rubber compounds Known Offered ^ one 2 3 Antioxidants: - Product, 4010-MA 1.0 1.0 1.0 Acetonedyl P 2.0 2.0 2.0 Microcrystalline wax (SV-1) 2.0 2.0 2.0

Technical

carbon with

specific surface

100 м / ^а 65 65 65

table 2 Indicators Duration of vulcanization, min - </ rubber compounds Known Offered one 2 s Voltage  - five 20 96 80 at 300% Seeded / kgf / cm ² ten 52 115 109 15 '71. "- 128 132 20 89 128 134. 60 106 119 120

Resistance

breaking

kgf / cm * 177 196 202

Relative

elongation,% 640,424 .468

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Continued table. · 3

^: T

Indicators Rubber compounds Known Offered one 2 . 3 Coefficient save strength after heat aging 100 ° C, 72 h 0.89 0.84 0.80 Rebound elasticity, 100 ° C,% 45 54 ⁵⁶ Hysteresis loss, К / Е at 20 ° С 0.50 0.44 0.45 100 ° C 0.39 0.25 0.27 Abrasion cm ^a / kw-h 262 241 236

Notes e. Vulcanization at 155 * C for 20 min

Table 4

Ingredients

Rubber mixes

Known Offered one 2 3 four

.one

Butadiene styrene new rubber one (SKMS-30 ARKM-15) 50 50 - 50 50 CIS-Butadiene rubber (ACS) zo zo thirty thirty cis isoprene rubber (SKI-3) „ 20 20 20 20 Sulfur 1.5 1.5 2.2 2.2 Sulfenamide C 1,3 0.5 0.8 0.8 Hexachloroparaxylol 0.4 0.6 0.2 1.0 S-caprolactam - 6.0 10.0 1.0 Zinc oxide 3.0 3.0 3.0 3.0 Steapin technical 2.0 2.0 2.0 2-, 0.

9

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ten

Continued table. four

Ingredients

Rubber compounds Known Offered one ί- ² ί “1 ±.

Rosin 1.0 1.0 1.0 1.0 Petroleum oil (PN-bsh) 6.0 6.0 6.0 6.0 Antioxidants: Product 4010-ΝΑ 1.0 1.0 1.0 1.0 Adetonanil P 2.0 2.0 2.0 2.0 Microcrystalline wax (SV-1) 2.0 2.0 2.0 2.0

conv. units 45 38 33 42

Properties of rubber, vulcanized at 155 ° C, 15 min

Stress at 300% elongation,

kgf / cm ^ζ 107 131 136 124 . · ✓ ·. Resistance rupture, kgf / cm * 198 203 201 178 Relative extension, %· to 556 436 376 404 Rebound elasticity at 100 С,% ⁵⁰ 56 52 54 Abrasion, cm® / kW .4 270 172 228 246

Properties of rubbers (yulkanizovayanyh at ¹⁸⁵ C, 5 min

Voltage at

300% elongation

kgf / cm * 103 107 110 172

eleven

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12

Continued table. five

Properties 1 Rubber compounds . Known l · a Offered one 2 3 4

Resistance ₂ tear, kgf / cm 195 192 185 192 Relative extension, % 495 484 488 310 - -  \

Tabl and c a 6 Ingredients Mixture Known Offered Naya '.....''• - · - ⁸ one 2 3

CIS-Butadiene rubber SKD

cis-isoprene rubber SKI-3

Sulfur

Santokur mor

Hexachloroparaxylol

VAT residue

Ν-Nitrosodiphenylamine

Zinc oxide

Stearin technical; cue

Rosin

Oil oil PN-bsh

Microcryst Allaic wax ZV-1

Product 4010-M And Quinol ED

Carbon black, PM-100

thirty ^thirty zo 70 70 70 1.6 1.6 1.6 0.8 0.8 .0,8 0.5 0.5 0.5 - 2.0 4.0 0.7 0.7 0.7 5.0 5.0 5.0 2.0 2.0 2.0 ϊ, ο 1.0 1.0 6.0 6.0 6.0 1.5 1.5 * ' ⁵ 1.0 1.0 1.0 2.0 2.0 2.0

52 52 52

13

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14

Table7

Indicators The duration of vulcanization, min Rubber compounds Fiendish Offered one 2 3 Voltage at 300% ten 83 118 109 lengthening 15 98 124 119 kgf / cm ² 20 103 125 118 40 104 123 116

T a ’b l and c a 8

Indicators Mixture Known Offered one 2 3

Mooney viscosity at 100 ° C

conv. units 34 30 29

Properties of rubber, vulcanized at 155 ^to C, 15 min

Resistance ₂ tear, kgf / cm 238

Relative extension, % . 552

Hysteresis loss, C / E

(100 ° C) · 0,23

Properties of rubber, vulcanized at 175 C, 5 min

Voltage at _; 300% elongation

240,239

51.2 516

0.19 0.19

about

kgf / cm ^g 80 114 109 Resistance ₂ tear, kgf / cm * 247 242 246 Relative elongation,% '580 528 524

40 In order to increase the speed and degree of vulcanization and improve the physical and mechanical properties of rubber from this mixture, the latter additionally contains C-caprolactam and / or oligomerization

Claims (1)

Claim Rubber mixture based on unsaturated rubber, including vulcanization accelerators: sulfenamide and hexachloroparaxylol, I distinguish -.- 3. 1..15 761503 sixteen The ments of ε-aminocaproic acid and co-components of the mixture are taken in the following ratio, parts by weight: Unsaturated rubber 100 Sulfenamide 0.5-1.0 Hexachloroparaxylol 0.2-1.2 £ -Caprolactam and / or the product of oligomerization of e-aminocaproic acid 1-10 •