High chlorinated polyethylene (HCPE) is mainly modified in adhesives through the polarity, stability, and functionality imparted by its molecular structure. The specific mechanism and application are as follows:
1、 Modified core function
1. Enhance adhesive performance
Enhance adhesion: The HCPE molecular chain of Bontecn Group China contains a large number of chlorine atoms (chlorine content>61%), forming a strong polar structure, significantly improving the wettability and chemical bonding strength of the adhesive to materials such as PVC, metal, and rubber.
Optimize flexibility: Its molecular chains are saturated and randomly distributed, avoiding stress concentration, endowing the adhesive film with good impact resistance and flexibility, and adapting to dynamic bonding environments.
2. Strengthen functional features
Corrosion resistance and flame retardancy: High chlorine content (>65) forms a chemical barrier to resist corrosion from acid, alkali, and oil media, and achieves self extinguishing upon ignition through chlorine free radical capture mechanism (ultimate oxygen index ≥ 60%).
Wear resistance and weather resistance: The non double bond structure inhibits oxidative degradation and extends the lifespan of the adhesive layer in humid, hot, and ultraviolet environments.
|
Adhesive type |
HCPE model |
Modification effect |
| PVC specific adhesive | HCPE-H(High viscosity) | Replacing vinyl chloride resin to achieve high-strength bonding of PVC pipes/sheets |
| Rubber metal composite adhesive | HCPE-L/M(Low/Medium Viscosity) | Toughened chloroprene rubber/nitrile rubber to enhance heat resistance (≥ 130 ℃) and interfacial adhesion |
| Adhesive layer for anti-corrosion coating | HCPE-M(Medium viscosity) | Enhance adhesion between coatings and synergistically improve anti-corrosion durability |
3、 Modification mechanism
1. Polarity enhancement mechanism
The introduction of chlorine atoms increases molecular polarity, promotes the formation of van der Waals forces and hydrogen bonds between the adhesive and the adhered surface, and improves wettability.
2. Compatibility adjustment
Mix with plasticizers (such as chlorinated paraffin), acrylic resin, etc. to optimize rheological properties and reduce internal stress.
4、 Storage points
Storage conditions: Sealed and stored in the dark (temperature<30 ℃) to prevent moisture absorption and performance degradation, with a shelf life of 24 months.
Post time: Jul-15-2025
