1、The effect of composite curing agent ratio on the photooxidative aging
In order to explore the effect of composite curing agent ratio on the photooxidative aging behavior of epoxy asphalt with an acidic composite curing system, three curing agent ratios of epoxy asphalt were prepared to obtain different cross-linking network densities.
2、Influence of curing agent ratio, asphalt content and crosslinking
The results show that the raise of the crosslinking degree and the proportion of anhydride curing agent increased the Tg of epoxy asphalt, impairing the low temperature performance. The increase in asphalt content was beneficial to the stability of the epoxy asphalt.
3、Study on the properties and curing behavior of high
To resolve the critical limitations of conventional epoxy asphalt, including high cost, excessive brittleness, and inadequate toughness, a high-toughness epoxy asphalt material was...
4、Effects of compound curing agent on the thermo
The results showed that in the presence of compound curing agent, the tensile strength and surface hardness of the epoxy asphalt curing system effectively improved, the induction period of the curing reaction decreased, the curing reaction mechanism turned to one-step reaction from two-step reaction, the Tg of asphalt phase and epoxy phase ...
Multiscale Analysis of Epoxy Asphalt Performance Based on Formulation
Higher dosage and curing temperatures lead to a significant increase in the viscosity, temperature sensitivity, and tensile strength of epoxy asphalt. However, anticracking performance at low temperature is compromised.
Journal of Applied Polymer Science
The rise in anhydride curing agent content increased the density of crosslinking network, limited the diffusion of oxygen atoms, and contributed to the resistance of epoxy asphalt chemical components to thermal oxygen aging.
Curing condition and optimum formulation of waterborne
Current researches on waterborne epoxy emulsified asphalt are not deep enough and its application is also few due to the complexity of type.Laboratory tests were therefore conducted to systematically investigate the effects of curing conditions of waterborne epoxy emulsified asphalt,dosage of waterborne epoxy resin and curing agent ...
Influence of curing agent ratio, asphalt content and
The radial distribution function (RDF) was calculated to observe the composition distribution of epoxy asphalt. The results show that the raise of the crosslinking degree and the proportion of anhydride curing agent increased the Tg of epoxy asphalt, impairing the low temperature performance.
Synthesis of a novel bio
If too much curing agent is used, the residual curing agent will affect the overall mechanical properties; therefore, it is important to determine the optimum weight ratio of epoxy resin to curing agent.
The Consequences and Preventive Measures of Insufficient Curing Agent
A recent article describes the effects of epoxy binder, curing agent, filler, initial solvent concentration, curing temperature, and relative humidity, on the curing-induced internal stress in epoxy coatings.
In the fields of construction and chemical engineering, epoxy asphalt coatings are widely used as critical anti-corrosion and waterproof materials for industrial facilities and building surfaces. during application, the problem of excessive curing agent usage often arises, which not only impacts coating performance but may also pose safety risks. This article aims to investigate the causes of excessive curing agent in epoxy asphalt coatings, analyze its effects on coating properties, and propose corresponding solutions.
I. Causes of Excessive Curing Agent in Epoxy Asphalt Coatings
- Operational Errors: During application, insufficient experience or unfamiliarity with procedures may lead workers to accidentally add excess curing agent.
- Measurement Inaccuracies: Low-precision measuring tools or errors during weighing can result in curing agent quantities exceeding theoretical requirements.
- Environmental Factors: Fluctuations in temperature and humidity may alter the evaporation rate of the curing agent, causing discrepancies between actual and calculated dosages.
- Batch Variations: Minor differences in composition or performance between products from different manufacturers may necessitate higher curing agent amounts in practice.
II. Effects of Excessive Curing Agent on Coating Performance
- Increased Coating Hardness: Excess curing agent reduces polymer content, leading to higher hardness. While this may enhance wear and chemical resistance, it can also limit flexibility.
- Reduced Flexibility: Higher curing agent concentrations increase brittleness, making coatings prone to cracking or peeling under mechanical stress.
- Weakened Adhesion: Over-crosslinking due to excess curing agent can reduce adhesion between the coating and substrate, compromising overall performance.
- Discoloration: Excess curing agent may cause color changes, such as darkening or yellowing, affecting aesthetic quality.
III. Solutions to Address Excessive Curing Agent
- Enhanced Training and Guidance: Improve worker skills and standardize operations to prevent dosage errors.
- Optimized Formulation Design: Adjust coating formulas to ensure curing agent ratios meet performance requirements while accommodating practical needs.
- Precise Measuring Equipment: Use high-accuracy tools to control curing agent volumes strictly.
- Environmental Considerations: Assess environmental conditions (e.g., temperature, humidity) before application to minimize evaporation-related issues.
- Batch Consistency: Source products from reputable suppliers and verify formulation details to avoid batch-induced discrepancies.
Excessive curing agent in epoxy asphalt coatings is a common issue that threatens both performance and safety. By strengthening training, optimizing formulations, using precise measurement tools, accounting for environmental factors, and ensuring batch consistency, this problem can be effectively mitigated. Prioritizing safety and quality remains essential to guarantee reliable coating performance and structural integrity.
