Against the backdrop of increasingly strict global environmental policies, water-based coatings have gradually replaced traditional solvent based coatings as the industry mainstream due to their advantages of low VOC emissions and environmental friendliness. The performance core of water-based coatings highly depends on the quality of the curing agent system. As a key component of water-based coating curing agents, polyisocyanates have poor water dispersibility due to their hydrophobic properties, which have long constrained the improvement of water-based coating performance. In this context, CAPS buffer (3-cyclohexylaminepropanesulfonic acid) has brought about a revolution in the water-based coating curing agent industry with its unique chemical structure and modification ability.

CAPS buffer

Three core advantages: CAPS compaction of traditional modifiers

1. Mild reaction conditions, dual breakthroughs in cost reduction and efficiency improvement

Traditional polyisocyanate modifiers often require high temperature and high pressure conditions to complete the reaction, which not only requires high production equipment, but also has problems such as high energy consumption and long reaction cycles. The CAPS modification technology completely breaks this limitation, without the need for strict reaction conditions, and can complete the modification reaction with polyisocyanates in just 4 hours at 90 ℃ environment. This advantage significantly reduces the investment and maintenance costs of production equipment, while shortening the production cycle and improving production efficiency.

2. Comprehensive improvement of coating quality, comparable to the performance of solvent based coatings

Coating quality is the core competitiveness of coating products. Traditional curing agents prepared with modifiers often suffer from problems such as low glossiness, poor water resistance, and uneven surface due to poor water dispersibility and insufficient compatibility with resins. The curing agent modified by CAPS achieves a dual leap in water dispersibility and resin compatibility: on the one hand, excellent water dispersibility ensures uniform distribution of the curing agent in the coating system; On the other hand, good compatibility with hydroxyl resin promotes sufficient crosslinking reaction, forming a dense curing network. The final two-component coating can achieve a glossiness of over 90 °, and its water resistance, density, and flatness have all been qualitatively improved.

3. Full flexibility of formula, covering all application needs in all scenarios

There are significant differences in performance requirements for water-based coatings in different application scenarios. For example, wood coatings need to highlight hand feel and glossiness, automotive interior adhesives need to emphasize bonding strength and flexibility, and textile coatings focus on friction resistance and breathability. The curing agent modified with CAPS has strong formula compatibility and can be perfectly adapted to various types and ratios of water-based resins such as acrylic resin and polyurethane dispersion. R&D personnel can flexibly adjust the formula components and ratios according to specific application scenarios, accurately meeting the personalized performance requirements of different scenarios.

Summary: CAPS has become the core engine of the water-based curing agent industry

CAPS, with its precise chemical modification ability, has brought three core breakthroughs to water-based coating curing agent systems: achieving cost reduction and efficiency improvement under mild reaction conditions, promoting performance upgrades through quality improvement, and expanding application boundaries with high compatibility. Its unique technological advantages have solved the industry pain point of poor water dispersibility of polyisocyanates, becoming the core engine for the high-quality development of the water-based curing agent industry. With the continuous expansion of the application field of water-based coatings, the market demand and application value of CAPS will continue to rise.

Product packaging

It is worth noting that the modification effect of CAPS is closely related to its purity and quality. Some CAPS products on the market have insufficient purity and high impurity content, which not only affects the efficiency of the modification reaction but may also lead to unstable curing agent performance. Hubei Xindesheng, as a strong enterprise deeply engaged in the chemical industry for many years, focuses on the research and production of high-quality CAPS. Whether used in the modification of water-based coating curing agents or biological buffering agents, it has demonstrated excellent performance. Hurry up and contact Hubei Xindesheng to get free samples and exclusive technical support!