1、A novel bio

Our results provide a way to synthesize bio-based curing agents to fabricate high-performance and degradable epoxy resin polymers that are expected to be applied in the aerospace fields.

2、Occupational exposure to epoxy resins

However, due to the same properties epoxy products are a notorious cause of allergic skin disease among workers. In addition, constituents of epoxy products may cause airway and eye irritation, and airway allergies or even more serious diseases such as cancers or diseases of the reproductive system.

3、The Unique Benefits of Anhydride Curing in Epoxy Resins

Anhydrides are key curing agents for epoxy resins, driving high crosslink density and enhancing properties like solvent resistance and electrical insulation.

Curing Regime

However, overheating and breakdown faults of epoxy resin-based insulation occur frequently under conditions of large current carrying and multiple voltage waveforms, which seriously threaten the safe and stable operation of the system.

Broch. EPOXY Engels

Accidental spills of resins, curing agents, and their formulations, should be contained and absorbed by special mineral absorbents to prevent them from entering the environment.

The study of curing behavior and thermo

The curing behavior of anhydride-epoxy systems indicated that the steric hindrance of anhydride curing agent significantly reduces the reactivity of the curing reaction. Therefore, the order of curing agent activity was MA, MTHPA, MNA and OSA.

Anhydride Cured Bio‐Based Epoxy Resin: Effect of Moisture on Thermal

However, also a major challenge with regard to practical applications of (bio-based) thermosets with anhydride curing agent thermosets is identified and addressed: the sensitivity to moisture absorption both during curing and in the fully cured state.

Epoxy Curing Agents – Anhydrides, Long Pot Life and Exceptional

Epoxy will homopolymerize to some extent and keeping the anhydride level lower will limit the amount of unreacted anhydride left at the end of curing. Especially for dianhydrides, keeping the amount of anhydride lower than theoretical help to avoid premature vitrification and overcrosslinking.

Curing reactions of epoxy powder coatings in perspectives of chemical

The properties of the cured products of epoxy powder coatings are dominated by the curing systems. This review discusses the types, reaction principles, characteristics of curing agents and accelerators that participate in the curing reaction with different epoxy resins.

(PDF) Curing epoxy resins with anhydrides. Model

In the present work, a commercial epoxy based on epoxy anhydride and tertiary amine was modified by a metallic catalyst (Zn2+) to induce vitrimeric behavior by promoting the...

In modern industry and construction, epoxy resins are widely used in adhesion, sealing, corrosion protection, and other fields due to their excellent physical and chemical properties. As a critical component of epoxy systems, anhydride-based curing agents directly impact the performance and safety of materials. their widespread application has increasingly exposed potential hazards, drawing significant attention. This article discusses the definition, composition, applications, and risks associated with anhydride-based epoxy curing agents.

I. Definition and Composition

1. Definition: Anhydride-based epoxy curing agents are chemicals used to promote the curing of epoxy resins. They primarily consist of anhydrides (e.g., phthalic anhydride) and amine compounds (e.g., polyamines or imidazole derivatives). These components react to form stable cyclic structures, enhancing the cross-linking density of epoxy resins and improving their mechanical strength and chemical resistance.
2. Composition: The active ingredient in these curing agents is the anhydride, which reacts with hydroxyl groups in epoxy resins to form stable rings. Amine compounds act as catalysts to accelerate this reaction. The selection and ratio of these components are crucial, directly affecting the quality and performance of the final product.

II. Application Fields

1. Adhesion and Sealing: Widely used to bond surfaces rapidly, forming durable joints with enhanced durability and weather resistance.
2. Corrosion Protection: Provides robust protection against moisture and corrosive substances, making it suitable for chemical equipment and marine facilities.
3. Electronics and Electrical Systems: Utilized in manufacturing circuit boards and cable insulation due to their electrical insulation and moisture resistance.
4. Construction and Decoration: Employed in flooring, walls, ceilings, furniture, and lighting, offering aesthetic appeal and eco-friendly properties.
5. Aerospace: Used in aircraft and spacecraft components requiring high strength, rigidity, and heat resistance.
6. Automotive Manufacturing: Applied in engines, transmissions, and chassis for wear resistance and stability under extreme conditions.
7. Sports Equipment: Enhances performance and longevity in items like rackets, bike frames, and skis.
8. Medical Devices: Used in heart stents and joint replacements for biocompatibility and stability.
9. Packaging and Printing: Utilized in boxes, bottle caps, labels, and high-quality printing materials.
10. Art and Crafts: Adds durability and creativity to sculptures, crafts, and decorative artworks.

III. Hazards and Risks

1. Irritating Odor: Releases strong, pungent smells during use, potentially damaging the respiratory system over prolonged exposure.
2. Skin Contact Hazards: Direct contact may cause redness, itching, blisters, or ulcers. Protective gloves are essential.
3. Eye Exposure Risks: Contact can irritate the cornea, leading to inflammation or vision loss. Rinse immediately with water and seek medical help.
4. Inhalation Risks: Volatile fumes may cause coughing, chest tightness, or respiratory damage. Ensure adequate ventilation.
5. Potential for Accidental Ingestion: Rare but possible, leading to poisoning. Store securely to prevent misuse.
6. Fire Hazards: Flammable when mixed with other substances. Follow safety protocols for storage and handling.
7. Environmental Pollution: Improper disposal may contaminate soil and water. Dispose of waste according to regulations.
8. Chronic Health Effects: Long-term exposure may cause headaches, fatigue, neurological damage, or liver issues.
9. Psychological Impact: High-concentration exposure may increase stress or mood swings. Monitor mental health.
10. Occupational Health Risks: Workers may face dermatitis, respiratory diseases, or other occupational illnesses. Regular health screenings are critical.

IV. Prevention and Control

1. Personal Protection: Use masks, gloves, and goggles to minimize skin, eye, and respiratory exposure.
2. Environmental Monitoring: Regularly test air quality and humidity in workplaces. Isolate hazardous substances.
3. Waste Management: Dispose of curing agents and residues in compliance with environmental laws.
4. Safety Training: Educate employees on risks and emergency procedures to reduce accident likelihood.
5. Emergency Response: Develop plans for accident scenarios, specifying roles and containment measures.
6. Regulatory Compliance: Adhere to national and industry standards for handling and usage.
7. Continuous Improvement: Optimize formulations and management practices based on feedback.
8. Public Awareness: Promote understanding of hazards and proper disposal through education campaigns.
9. International Collaboration: Engage in global knowledge-sharing to advance safer technologies.
10. Technological Innovation: Invest in eco-friendly alternatives and innovative solutions to reduce reliance on hazardous materials.

V. Case Study

1. Incident Review: A chemical plant leaked high-concentration anhydride-based curing agents due to operational errors or equipment failure. Nearby residents experienced dizziness and nausea, diagnosed as mild poisoning.
2. Cause Analysis: Poor management, lack of expertise, and inadequate equipment maintenance contributed to the incident. Inadequate raw material quality control was also a factor.
3. Impact Assessment: Residents recovered but faced ongoing health monitoring. The plant’s production was temporarily halted.
4. Lessons Learned: The incident underscores the need for stricter management, employee training, and equipment inspection. Enterprises must prioritize safety to avoid recurrence.

This translation maintains the original structure and content while adapting technical terms and hazard descriptions for an English-speaking audience. Let me know if further refinements are needed!