Styrene-Butadiene Rubber
DESCRIPTION: Styrene-butadiene rubber SKS-30 ARK (SBR-1500) is a styrene and butadiene copolymer obtained by emulsification method with the use of mixture of rosin and fatty acids soaps. It is stabilized by non-staining antioxidant.
REACH: registered
APPLICATION: SKS-30 ARK (SBR-1500) is a general-purpose rubber. It is widely used in tire, rubber technical, footwear 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 yellow to dark-yellow
TECHNICAL REQUIREMENTS
| Parameters | Standard | Test Method | Note |
|---|---|---|---|
| Mooney viscosity ML 1+4 (100оC) | 46-56 | ASTM D 1646 (para. 7.2.2) | v |
| Volatile matter content, %, max (1 hour) | 0.8 | ASTM D 5668 (method C) | v |
| Ash content, %, max | 0.5 | ASTM D 5667 (part A) | v |
| Bound styrene content, % | 22.5-24.5 | ASTM D 5775 | v |
| Antioxidant content, % | 1.0-2.0 | method of supplier | v |
| Organic acids content, % | 5.0-7.0 | ASTM D 5774 | v |
| Organic acids soaps content, %, max | 0.3 | ASTM D 5774 | v |
| Rheometric Properties according to ASTM D 5289 | |||
| -ML, dNm | 1.8-3.0 | ASTM D 5289 | vv |
| -MH, dNm | 15.0-21.0 | ASTM D 5289 | vv |
| -ts1, min | 2.2-4.5 | ASTM D 5289 | vv |
| -t’50,min | 7.0-12.0 | ASTM D 5289 | vv |
| -t’90,min | 13.0-21.0 | ASTM D 5289 | vv |
| Properties of Vulcanizates (sheet vulcanization, 35 min, 145 oC) | |||
| Tensile strength, MPa, min | 23.0 | ASTM D 412 method A | vv |
| Elongation at break, %, min | 400 | ASTM D 412 method A | vv |
v – specified in the certificate of quality.
vv – non-rejectable.
Preparation of rubber mixes is carried out in accordance with ASTMD 3185 recipe 1А, method A, on the roll mills prepared acc. 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.
