OJSC Efremov Synthetic Rubber Enterprise

Ефремовский завод синтетического каучука

ГGOST

Synthetic Rubber SKDSN

TECHNICAL REQUIREMENTS

Rubber SKDSN must confirm the requirements shown in table:

TECHNICAL DATA
Properties Results
Viscosity at 50°C, Pa.s 30,0 … 80,0
Ash mass content, %, max 0,3
Volatile matters content, %, max 0,7
Antioxidant mass content, %, in limits 0,2 … 0,6

THE SCOPE

Rubber SKDSN is a product of butadiene polymerization on anionic types of catalysts and referred to rubbers of common use. Rubber SKDSN is butadiene polymer of regular structure, which contains 1,2-vinyl links in polymer chain from 40 to 80 % (upon consumer's request).

RUBBER SKDSN PRODUCTION

SKDSN is produced by butadiene polymerization in toluene in presence of anionic catalyst normal butyl lithium, which is at the same time the co-initiator of reaction and electrons donor. The polymerization process goes in reactor, equipped with a mixer and a shirt to which cooled brine is sent for heat removal. Anionic polymerization in solution requires careful purification and drying of raw materials, and the polymerization has large opportunities in regulating polymer's properties through associated forms of "live" macromolecules.

PHYSICAL AND CHEMICAL PROPERTIES

Rubber SKDSN is a viscous light up to dark brown mass. Density: 900-910 kg/cm3. It is soluble only in organic solvents at normal conditions. Rubber can be oxidized. Phenol types of antioxidants (NG2246 ) are used to prevent oxidation. The polymer's dynamic viscosity sharply reduces when heating.

The dependence of SKDSN dynamic viscosity on the temperature is shown in figure 1. Rubber SKDSN is a substance of low hazard. It is not irritative when contacting to skin.

APPLICATION FIELDS

Rubber SKDSN is successfully used in electrical engineering, rubber processing and constructing industries as a base for corrosion resistant sealants, bitumen polymeric insulators, varnish coatings and plastisizers production. Depressors' compounds are produced on base of rubber SKDSN. Depressors' compounds are used for making changes in rheological data and cooling temperature reduction in petroleum, gas condensators, and distillation fractions of petroleum oil, fuel oils. They are also used to prevent waxes residue formation. Some of the depressors are the solutions of 10-60 % mass of active substance in hydrocarbon solvent.

PACKAGING AND TRANSPORT

Rubber SKDSN is available in aluminum drums or special metal package. SKDSN can be transported by any of covered transportation means.

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