SU477161A1 - Rubber compound based on diene stereoregular rubbers - Google Patents

Description

I

The invention relates to the production of rubber from diene regular rubbers and known ingredients that work under conditions of dynamic deformation at elevated and low temperatures.

It is known that increasing heat resistance, frost resistance and dynamic endurance of rubber from stereoregular diene rubbers can be achieved by proper selection of the formulation, as well as the introduction of modifiers.

However, the introduction of any well-known vector 1 results, as a rule, in the improvement of one property and adversely affect others. For example, to produce rubber that is resistant to thermo-oxidative effects, substances are used that create strong cross-links (thiuram, peroxides, etc.). As a rule, these vulcanizates have low dynamic endurance and low frost resistance.

Sulfur vulcanized rubbers have high dynamic endurance and frost resistance, but have low heat resistance.

To obtain rubber, it has high heat resistance, good dynamic endurance and frost resistance, according to

In accordance with the invention, the composition of the rubber mixture based on diene stereoregular rubbers and commonly used additives is used to introduce a modifying agent of the type Ar (5O2C1) t1, where Ag is aryl or or 2.

Prepare mixtures of the compositions given in Table. one.

Table I

The mixing is carried out by introducing the ingredients for a certain time.

Time of administration, min. About 5 10 15 22

Remove from rollers

25

Physico-mechanical properties of rubber based on SKD

Vulcanization is carried out in an electric pressure at 143 ° C for 15 minutes.

The properties of rubbers in example 1 are shown in table. 2

Example 2. Preparing mixtures of the composition given in Table. 3

table 2

Table 3

 SKD-IV has a higher content of links in the 1.4 cis position compared to SKD-1.

The mixing is carried out as follows:

Introduction time, min

Rubrax Rubber

Stearic acid / g-Toluene sulfonyl sulfenamide BT Zinc oxide

Vulcanization was carried out at 143 ° C for 40 minutes.

Rubber properties are listed in Table. four.

Example 3. Preparing mixtures of formulations given in Table. five.

Table 5

The offset is carried out according to example 1.

Introduction time, min

ABOUT

four

7

10 15 19

23

Total:

Vulcanization is carried out in an electrostress at 143 ° C for 20 minutes.

The properties of the obtained rubber are given in table. 6

As follows from the above examples, the introduction of a modifier of the type Ag02C1 or Ag (O2C1) 2 into the rubber composition on the basis of diene rubbers leads to a significant increase in dynamic endurance with a high level of heat resistance and frost resistance. The introduction of the modifier into rubber compounds based on rubbers degraded during thermal aging is especially effective (Example 3).

Table 6

Physico-mechanical properties of rubbers based on SKI-3

Subject invention

A rubber mixture based on diene stereoregular rubbers, containing a modifier and commonly used additives, characterized in that, in order to improve the physicomechanical properties of the rubber obtained, aromatic sulfonyl chloride compounds of the general formula Ar (302С1) ", where Ar is aryl and or 2 in the amount of 0.5-5 weight. hours per 100 weight. rubber h.