SU810736A1 - Rubber mixture based on dienic rubber - Google Patents

Description

one

The invention relates to the rubber industry, in particular to the development of a rubber mixture based on diene rubber.

Known rubber mixture based on diene rubber, including sulfur, a vulcanization accelerator (diphenylguanidine, altax), zinc oxide, stearin, carbon black and a modifying additive (rosin), for example, in a ratio of 100: 2.5: 3: 3: 2: 30: 3

1 This mixture has unsatisfactory technological properties, and rubber from it - low physical and mechanical properties.

The purpose of the invention is to improve the technological properties of a known mixture and improve the physico-mechanical properties of rubber from it.

The goal is achieved by the fact that a rubber mixture based on diene rubber, including sulfur, a vulcanization accelerator, zinc oxide, stearin, carbon black and a modifying additive, as the latter contains the product of the polymerization of pinened turpentine (incomplete turpentine) in the following ratio of components, wt. %:

Diene rubber58-63

Sulfur 0.6-1.2

Vulcanization accelerator 1.8-2.2 Zinc Oxide2.6-3.0

Stearin0,6-0,9

The product of polymerization of purified from pinene turpentine2, 5-3.0 SazhoDo 100 The product of polymerization introduced into the rubber mixture of turpentine resistant turpentine has the following characteristics: Softening temperature, ° C +75 Molecular weight510-30 Viscosity of 40% toluene solution at 20 ° C2-7

The invention is illustrated by examples. Example 1. Preparing mixtures of the composition given in Table. one.

In the manufacture of mixtures used chain-chain rubbers: isoprene or butadiene styrene, as a vulcanization accelerator - altax or a combination of altax with dpphenylguanidine.

The production of mixtures is carried out on a laboratory roll mill with a size of 160x320 mm and in a 3 l rubber mixer.

Vulcanization is carried out in electrically heated hydraulic frame presses.

Testing mixtures showed an improvement in some characteristics of the mixtures (see Table

Table 1

2) obtained using the product of polymerization of turpentine without pyene: siphonic products of the product of polymerization of turpentine without pinene have significantly better performance properties: dynamic endurance with repeated stretching, heat generation, heat aging coefficient, heat resistance.

The use of the proposed resin as an effective modifier of ROSEIN gives the following advantages in comparison with compared modifiers:

the performance characteristics of the belt and frame rubbers are significantly increased,

the raw material base of rubber compounding ingredients is being expanded, replacing scarce and expensive products with resin, the raw materials for which are currently limited in sales.

viscosity, increased ductility, especially for dl. frame mixes. Rubber

table 2

According to the complex of characteristics, rubber mixes with a polyterpene resin obtained from turpentine without pinene, considerably exceed similar mixtures with rosin and polyterpene resin obtained from turpentine with pinene. In addition, the dosing and transportation of the modifier is improved in comparison with rosin.

Claims (1)

Invention Formula Rubber mixture based on diene rubber, including sulfur, vulcanization accelerator, zinc oxide, stearin, carbon black and modifying additive, characterized in that, in order to improve the technological properties of the mixture and improve the physico-mechanical properties of rubber from 56 it, the mixture as a modifying pre-product of the polymerization of the decontamination contains the product of the polymerization of pinene from skene scoured from pinene turpentine with a barely 2.5-3.0 the following ratio of components, weight. %: Soot Up to 100 Diene rubber 58-635 Sources of information. Sulfur 0.6-1.2 springs into account during examination The vulcanization accelerator 1,8-2,21. GOST 14225-75 "Rubber mixture for Zinc oxide 2,6-3,0 sealants and rubber products Stearin 0,6-09 (prototype). 810736