O-Ring Materials - IIR
Butyl rubber is a copolymer of isobutylene and a small amount of isoprene. After modification, bromobutyl rubber and chlorinated butyl rubber products can be derived.
Material properties:
● Excellent resistance to chemicals and polar fluids.
● Excellent electrical insulation and good ozone resistance.
● Low gas and moisture permeability and high shock absorption.
Applicable industries:
● Inner tubes, water tubes, vulcanization bladders, airtight layers, sidewalls, medicinal bottle stoppers, gas masks, etc.
● Wires and cables, waterproof building materials, shock-absorbing materials, anti-corrosion products and other products.
Best● Better○ Good△ BadX
| Rubber type (ASTM Abbreviation ) | Butyl Rubber IIR | ||
| Chemical structure | Butene with a small amount of iso-prenes polymer | ||
| Main feature | Weather resistant, ozone resistant, animal or vegetable oil resistant and oxidizable chemicals. | ||
| Pure rubber properties | proportion Muni viscosity ML1+ (100℃) | 0.91 ∼ 0.93 45 ∼ 75 | |
| Physical properties of synthetic rubber | Possible JIS hardness range General temperature range(℃) Special temperature range(℃) Tensile strength (kg/cm2) Elongation (%) Anti-elastic Cracking Wear resistance Bending resistance | 50 ∼ 80 -40 ∼ 100 -50 ∼ 120 50 ∼ 150 800 ∼ 100 △ ○ ○ ● | |
| Various properties of synthetic rubber | lubricating oil | Engine oil Gear Oil Motor oil Shaft lubricant Refrigeration oil Butter Lithium oil Oyster sauce | X X X X X X X ● |
| Working oil | Pot shaft oil Oil + Water emulsion system Water + Glycol Phosphate ester Si Brake Fluid Gear oil | X △ ● ● ● ● X | |
| Fuel oil | Light oil、kerosene Heavy oil Gasoline | X X X | |
| Water | Water、Warm water Water vapor、Hot water Antifreeze water Water cutting oil | ● ● △ △ | |
| Drug | Hydrochloric acid 20% | ● ● ○ ● X X ● ● ○ X ○ | |
| Gas | LPG Urban gas Ozone Freon 12 Freon 22 | X △ ● ○ ○ | |
| Other | Food Sanitation Law | ● ● | |
| The main purpose | Rubber parts for vacuum equipment. | ||