PCL3000 PCL4000 was used as the soft segment, and toluene diisocyanate was used as the hard segment to generate hydroxy terminated waterborne polyurethanes, which were crosslinked with water-disperable polyisocyanate to form a two-component waterborne shape memory polyurethane coating adhesive.The results show that the water-based polyurethane finish fabric with PCL4000 as the soft section has better waterproof performance, and the maximum hydrostatic pressure resistance of the coated fabric is 9.8kPa. Because of the crystallization property of PCL, the moisture permeability of coated textile is significantly improved between 35 ℃ and 50℃, which is increased by 4 ~ 8 times. The crystallization property of PCL4000 is stronger than that of PCL3000. The moisture permeability of the coated textile prepared in the former is stronger than that of the latter, and the moisture permeability is 5.95kg/(m2·d).

In recent years, waterproof and moisture permeable coating has achieved rapid development in textile finishing industry. The technology has gradually changed from non-temperature-sensitive waterproof and moisture permeable textile coating to temperature-sensitive waterproof and moisture permeable textile coating.Experts also constantly perfect the method and technology of waterborne polyurethane modified, win min type of waterproof and moisture permeable fabric coating in the future to explore key should first focus on the improvement of waterborne polyurethane coated fabric touch Improve the water resistance and anticorrosive antibacterial properties of fabric coating, etc, this is very important to this kind of fabric coating applied to clothing market.With the improvement of people's awareness of environmental protection and the improvement of living standards, the market demand for waterproof and moisture permeable textile coating has a wider development prospect

Sinograce Chemical company produces various types of polyurethane solutions for a variety of applications such as stripable coatings, water-based glues, etc