Styrene-Butadiene Rubber
DESCRIPTION: Styrene-butadiene rubber SKS-30 ARKM-27 (SBR-1723) is a styrene and butadiene copolymer obtained by cold polymerization with the use of mixture of rosin and fatty acids soaps, filled with TDAE-type aromatic oil and stabilized by staining antioxidant.
REACH: registered
APPLICATION: widely used in tire, industrial rubber and other industries.
Rubber should not contain any foreign impurities and must meet the following requirements:
Appearance: briquettes (bales)
Weight: 30.0+/-1.0 kg
Colour: from light-brown to dark-brown
THE PRODUCT MUST MEET THE FOLLOWING QUALITY PARAMETERS:
TECHNICAL REQUIREMENTS
| Parameters | Standard | Test Method | Note |
|---|---|---|---|
| Mooney viscosity ML 1+4 (100оC) | 47-57 | ASTM D 1646 (para. 7.2.2) | v |
| Viscosity spread within a batch, units, max | 6 | – | v |
| Volatile matter content, %, max (1 hour) | 0.6 | ASTM D 5668 (method C) | v |
| Ash content, %, max | 0.6 | ASTM D 5667 (part A) | v |
| Organic acid content, % | 4.0-5.6 | ASTM D 5774 | v |
| Organic acids soaps content, %, max | 0.3 | ASTM D 5774 | v |
| Bound styrene content, % | 22-25 | ASTM D 5775 | v |
| Oil (TDAE) content, % | 26-29 | ASTM D 5774 | v |
| Antioxidant content, % | |||
| – VS-1 or | 0.3-0.7 | method of supplier | v |
| – Agidol-2 | 0.8-1.5 | method of supplier | v |
| Rheometric Properties according to ASTM D 5289: | |||
| – ML, dNm | 1.6-2.3 | ASTM D 5289 | vv |
| – МН, dNm | 12.6-16.5 | ASTM D 5289 | vv |
| – ts1, min | 3.5-6.5 | ASTM D 5289 | vv |
| – t’50, min | 6.5-10.5 | ASTM D 5289 | vv |
| – t’90, min | 15-18.5 | ASTM D 5289 | vv |
v – specified in the certificate of quality.
v – non-rejectable.
Preparation of rubber mixes is carried out in accordance with ASTMD 3185 recipe 1А, mixing – according to method A. Mixing mills are prepared according to ASTM D 3182. Rheometric properties are determined according to ASTM D 5289 using an MDR 2000 rheometer (flow meter). Wait time for rubber mix before testing is 2-6 hours.
RUBBER MIX RECIPE AND MEASUREMENT CONDITIONS:
| Parameters | Standard |
|---|---|
| Rubber mix recipe in parts by weight acc. to ASTM D 3185, recipe 1А: | |
| – Rubber | 100.00 |
| – Zinc oxide | 3.00 |
| – IRB 7 (N330) carbon black | 50.00 |
| – Sulphur | 1.75 |
| – Stearic acid | 1.00 |
| – TBBS (N-tert-Butyl-2-benzothiazolesulfenamide) | 1.00 |
| Rheometer MDR 2000, measurement conditions: | |
| – Temperature, оС | 160 |
| – Duration, min | 30 |
| – Oscillation amplitude, deg. | +/-0.5 |
| – Oscillation frequency, Hz | 1.7 |
GENERAL INSTRUCTIONS
PACKING: Rubber briquettes (bales) are packaged in marked PE film (thickness of 0.05 ± 0.01 mm, melting temperature of 108-112°С), then – in plastic box pallets of 450kg or in plywood containers of 1,080kg, or metal containers of 1,260kg.
TRANSPORTATION: Rubber is transported by all types of transport in covered transporting means in accordance to all rules of cargo’s transportation standing at transport of this form.
STORAGE: At a temperature not exceeding 30⁰С, in dry place free from direct sunlight.
GUARANTEED SHELF LIFE:1 (one) year from the manufacture date. After the expiration of the guaranteed shelf life, the rubber can be used for its intended purpose after confirmation of its conformity to the requirements of this product specification.
