Liquid Polybutadiene (LBR Processing Aid)
Liquid Polybutadiene (LBR) is a low molecular weight, viscous liquid elastomer used as a processing aid, plasticizer, and tackifier in rubber compounds. Unlike conventional process oils, LBR chemically co-cures with the rubber matrix during vulcanization, contributing to the crosslinked network and maintaining or improving compound physical properties. It is particularly valuable in EPDM, BR, and SBR compounds where migration-free plasticization and enhanced tack are required.
Teknik Özellikler
| ash (%) | ≤0.10 |
| appearance | Colorless to light yellow viscous liquid |
| moisture (%) | ≤0.20 |
| microstructure vinyl (%) | 20–70 (grade-dependent) |
| viscosity (25°C, Pa·s) | 10–100 (grade-dependent) |
| molecular weight (Mn, g/mol) | 1000–3000 |
Uygulama Alanları
- EPDM seals and gaskets requiring migration-free plasticizer
- BR and SBR tire compounds for tack improvement
- Rubber-to-metal bonding compounds
- Sealants and adhesive rubber formulations
- High-performance rubber goods requiring retained physical properties
Ürün Özellikleri
- Co-cures with rubber matrix during vulcanization — no migration
- Improves tack and green strength in uncured compounds
- Maintains physical properties better than conventional process oils
- Wide molecular weight range available for compound optimization
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