Views: 0 Author: Site Editor Publish Time: 2025-07-28 Origin: Site
In two-component polyurethane (PU) systems, strict moisture control is essential to ensure product stability and performance. Even trace amounts of water can trigger undesirable side reactions with isocyanates, causing excessive foaming, poor curing, and a significant drop in mechanical strength. For years, GRACE SYLOSIV® K300 has been widely used in the industry as a high-performance desiccant for such moisture-sensitive applications.
CHEMXIN 3A activated molecular sieve powder has been developed as a dependable and cost-effective alternative to SYLOSIV® K300. Through extensive laboratory testing and real-world application feedback, CHEMXIN’s product has demonstrated comparable—and in some cases superior—performance, offering a valuable domestic solution for PU manufacturers.
Under standard conditions (25°C, 50% RH), CHEMXIN activated MS powder achieves a saturated water uptake of 25.3%, which is 12% higher than that of K300. In tests conducted with organic solvents simulating real PU systems, CHEMXIN shows an adsorption rate 1.8 times faster than K300, efficiently reducing moisture from 0.5% to below 0.05% in just 30 seconds.
Its well-controlled 3A pore structure (~3 Å) ensures high selectivity for water molecules (kinetic diameter ~2.8 Å), while effectively rejecting polyols and other key PU components (typically >4 Å). This prevents interference with the formulation and helps maintain system stability. Even at a 4% addition rate, viscosity fluctuation remains within ±5%, ensuring smooth processing and curing.
With excellent desiccation efficiency, consistent performance, and a competitive cost structure, CHEMXIN activated powder is an ideal replacement for GRACE SYLOSIV® K300. It supports both domestic and international material sourcing, reduces procurement risk, and helps manufacturers around the world achieve stable, high-quality results in PU adhesive, sealant, and coating applications.
About Chemxin:
Guangzhou Chemxin Environmental Material Co., Ltd. has specialized in the production of molecular sieve, molecular sieve activated powder, activated alumina, and ceramic ball for over 23 years. Our factory covers 50,000 square meters and employs more than 250 staff members, including a dedicated R&D team committed to innovation and quality.
If you have any inquiries or requirements, please feel free to contact us at any time. We are here to provide you with professional solutions and reliable service.
E: info@chemxin.com
