Application of environmentally friendly multi-function pH regulator SILRES BS198 in water-based coatings (2)

2.4 Good storage stability
BS198 and organic amine, 10% NaOH storage stability in the above coating system, mainly to investigate the 30 d after the coating in the oven at 50 degrees C viscosity and pH changes, the results can be seen in Figure 7 to Figure 11.

can be seen from Figure 7 to Figure 11, BS198 has good storage stability in the various coating systems mentioned above. In acidic emulsion systems such as VAE and acetate, BS198's ability to regulate pH is slightly weaker than organic amines, but it still has better viscosity stability.2.5 additionsBS198 the recommended additions in coatings are generally 0.1% to 0.3%. In the test formulation in this paper, 0.1% was actually added to the phenyl and pure propylene systems, and 0.2% in the VAE and acetate systems. If more alkali-soluble thickeners are added to the formulation, the dosage of BS198 should be increased.2.6 On the effect of iron container flash rust Because the packaging effect of iron container is good, many water-based building coatings choose to store in iron container, so it is necessary to investigate the effect of pH regulator on flash rust. Usually the inner walls of iron containers are coated with a layer of rust-proof paint, but there is usually a leak in the weld, where flash rust often occurs. In order to investigate its impact, various storage conditions were evaluated, including room temperature storage, outdoor storage (with sun, rain, temperature difference), oven storage (55 degrees C) and so on. The BS198 is particularly resistant to flash rust. This is due to the fact that BS198 is a completely non-volatile compound with excellent pH stability relative to volatile ammonia, organic amines and other amines. High pH helps to act as a passivation of metals.2.7 Effect on preservative efficacyIn order to investigate the effect of BS198 on preservatives, the Shanghai Institute of Microbiology will be entrusted with the coating with SILRES BS198 for bacterial and mold inoculation culture test, the results show that BS198 has good compatible with preservatives commonly used in coatings, i.e. it will not affect the performance of preservatives under the recommended dosage.3 Conclusion BS198 is an excellent multi-functional pH regulator, its greatest advantage is colorless, tasteless, environmental protection, in low-grade high PVC coatings can improve the scrub resistance of the coating, in high-grade clean taste coatings can reduce VOC content and irritating odor, but also improve the water resistance of the coating.