THPA
THPA (Tetrahydrophthalic Anhydride, CAS No. 85-43-8) is a cyclic anhydride curing agent for epoxy resins. It offers excellent chemical resistance, mechanical strength, and electrical insulation, making it widely used in electrical insulation, composites, adhesives, and coatings.
Description
THPA (Tetrahydrophthalic Anhydride)
Product Overview
THPA (Tetrahydrophthalic Anhydride, CAS No. 85-43-8) is a cyclic anhydride curing agent for epoxy resins. It offers excellent chemical resistance, mechanical strength, and electrical insulation, making it widely used in electrical insulation, composites, adhesives, and coatings.
Key Features & Advantages
- High Reactivity: Provides efficient curing at moderate temperatures.
- Outstanding Insulation: Excellent dielectric strength for electrical applications.
- Chemical Resistance: Strong resistance to acids, alkalis, and solvents.
- Mechanical Strength: Enhances toughness and dimensional stability of cured products.
- Versatility: Suitable for both liquid and solid epoxy formulations.
Applications
- Electrical Insulation: Casting and encapsulation for transformers, motors, and capacitors.
- Electronics: Encapsulation of semiconductors, ICs, and LED components.
- Composites: Reinforced epoxy composites for automotive, aerospace, and industrial use.
- Coatings & Adhesives: Industrial coatings and high-performance adhesives.
- Construction: Used in epoxy flooring and protective coatings.
Customer Concerns & Our Solutions
- Purity & Quality: THPA with ≥ 99% purity, controlled acid value, and low moisture content.
- Packaging: Available in 25kg bags, 220kg steel drums, or customized packaging.
- Handling: Stable solid anhydride, safe for storage and transport.
- Supply Reliability: Large-scale manufacturing capacity ensures consistent availability and competitive cost.
Why Choose Us
- Professional Manufacturer: Zhejiang Heyi Chemical Co., Ltd. with 80,000+ tons annual capacity of anhydride curing agents.
- Global Standards: REACH, RoHS, and other international certifications.
- Technical Expertise: R&D support for tailored curing systems and formulation design.
- Long-Term Partnership: Reliable quality, consistent supply, and customer-first service.
FAQ (Example For Buyers)
Q1: What is the appearance of THPA?
A1: White crystalline solid.
Q2: How does THPA differ from MTHPA or MHHPA?
A2: THPA is a solid anhydride with good reactivity and insulation, while MTHPA/MHHPA are liquid or semi-solid with better processability. Choice depends on curing requirements.
Q3: What is the shelf life of THPA?
A3: At least 12 months when stored in a cool, dry, and ventilated warehouse.
Q4: Can I request a sample before purchase?
A4: Yes, free samples (500g–1kg) are available for testing.
After-Sales Service
- Documentation: COA, TDS, and MSDS available for every batch.
- Technical Support: Guidance on curing conditions and epoxy system compatibility.
- Customer Service: Fast response, stable supply, and flexible cooperation models.
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