The company has a 5000 ton/year polyisobutene plant, which produces typical saturated linear polymers through positive ion polymerization of isobutene. These polymers have the characteristics of not burning or assisting combustion.
Medium molecular weight polyisobutene has colorless, odorless, non-toxic, and excellent acid, alkali, salt, water, ozone, and aging resistance, as well as excellent airtightness and electrical insulation properties. Polyisobutylene has good compatibility with asphalt, wax, polyethylene, etc. Therefore, it has been widely used in adhesion, sealing, insulation glass sealing materials, anti vibration materials, pressure-sensitive adhesives, lubricant viscosity index modifiers, lubricant viscosity enhancers, and gap filling materials, especially in insulation glass sealing materials.
Medium molecular weight
Item Brand/Index | Control indicators | Typical value of 650 grade | |||||||
PIB- 250 | PIB- 350 | PIB- 450 | PIB- 550 | PIB- 650 | PIB- 750 | PIB- 850 | PIB- 950 | ||
Appearance | Colorless viscous liquid or semi-solid, no mechanical impurities, no foam | Colorless viscous liquid, no mechanical impurities, no foam | |||||||
Volatile matter (mass fraction)/% | ≤0.3 | 0.17 | |||||||
Penetration(1/10mm) | ≤270 | ≤200 | ≤170 | ≤160 | ≤150 | ≤130 | ≤120 | ≤100 | 105 |
Molecular weight distribution | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.2 | ≤3.2 | ≤3.4 | ≤3.5 | 2.30 |
Viscosity average molecular weight×104 | 2~3 | 3~4 | 4~5 | 5~6 | 6~7 | 7~8 | 8~9 | 9~10 | 65780 |