Product Description
Epoxidized Hydroxyl-Terminated Polybutadiene (EHTPB) is an eco-friendly epoxy resin toughening agent synthesized by introducing highly reactive epoxy groups into the backbone of HTPB (Hydroxyl-Terminated Polybutadiene), combining the flexibility of polybutadiene with the high reactivity of epoxy resins. Compared to traditional HTPB（CAS No.: 69102-90-5), EHTPB achieves a performance leap through chemical modification:
● Higher Reactivity: Epoxy groups significantly enhance molecular polarity and crosslinking efficiency, enabling compatibility with diverse curing agents (e.g., amines, anhydrides), addressing the limitations of HTPB (which relies solely on hydroxyl reactions). This makes EHTPB ideal for high-performance epoxy adhesive raw materials.
● Enhanced Comprehensive Properties: Post-curing, EHTPB forms a dense 3D network structure, delivering superior mechanical strength, heat resistance (improved by 20-30% to 150°C+), and chemical resistance (especially to acids/alkalis), outperforming HTPB-based materials. It meets stringent requirements for high-temperature-resistant automotive structural adhesives and industrial bonding solutions.
● Broader Applicability: Retaining HTPB’s flexibility while achieving strong adhesion to polar substrates (e.g., metals, ceramics) via epoxy groups (HTPB excels with non-polar substrates). This versatility supports applications such as specialty coatings additives and polymers for electronic potting compounds.
Halogen-free, EHTPB is an ideal replacement for traditional halogenated materials and polyurethane-modified materials, serving as a core ingredient for low-shrinkage sealant formulations.
1. Dual Reactive Sites: Retains HTPB’s hydroxyl groups while introducing new epoxy groups, enabling synergistic crosslinking with multiple curing systems (HTPB relies on single hydroxyl reactions). This adaptability supports complex industrial bonding solutions.
2. Comprehensive Performance Upgrades: 15-25% higher hardness, 30-50% lower shrinkage, and heat resistance up to 150°C+ (vs. HTPB’s ≤120°C), meeting demands for aerospace sealant raw materials and new energy battery potting compounds in extreme environments.
3. Expanded Bonding Range: Compatible with polar (metals, ceramics) and non-polar (plastics) substrates (HTPB favors low-surface-energy materials like rubber/plastics). Ideal for polymers for electronic potting compounds and specialty coatings additives.
4. Environmental Compliance: Halogen-free elastomer raw material, compliant with strict environmental regulations in electronics/automotive industries (some HTPB derivatives contain halogen modifiers).
● Adhesives & Sealants:
o High-Temperature Resistant Automotive Structural Adhesives: Engine compartment and battery pack sealing, withstanding long-term thermal aging.
o Low-Shrinkage Sealant Formulations: Precision equipment encapsulation, shrinkage rate <0.5%, ensuring dimensional stability.
● Electronic Materials:
o Polymers for Electronic Potting Compounds: 5G high-frequency circuit board encapsulation, dielectric loss <0.02, excellent humidity resistance.
o New Energy Battery Potting Compounds: Insulation protection for power battery packs.
● Coatings & Elastomers:
o Specialty Coatings Additives: Heavy-duty anti-corrosion coatings, salt spray resistance >2000 hours.
o Eco-Friendly Epoxy Resin Toughener: Enhances epoxy composites, increasing impact strength by >50%.
● Aerospace Sealant Raw Materials: Withstands extreme temperature cycling from -60°C to 80°C.
Product Consistency:
Stable quality and reliable performance in every batch.
Stable Supply:
Own factory ensures long-term and steady supply.
Free Samples:
Free samples available for testing and evaluation.
Global Logistics:
Experienced in international shipping and hazardous export.
