PP-1921 is an ideal (resorcinol free) adhesion promoter to enhance the bond strength between rubber and synthetic fiber cords or brass/bronze coated steel wire. During vulcanization, PP-1921 reacts with formaldehyde donors such as HMMM and HMT to form cross linked structures that retain good adhesion properties upon heat, and humidity ageing.
| Resin Type | Typical Properties | |
|---|---|---|
| PP-1921 | Cresol formaldehyde resin | Softening Point (°C): 92-107 Ash Content (%): < 0.70 |
| PP-1922 | Cresol formaldehyde resin | Softening Point (°C): 95-105 Ash Content (%): < 0.70 Free monomer (%): < 5.0 |
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