Type of optical brightener raw powder
(1) OB-1} appearance and properties: OB-1 is a gorgeous yellow powder with a melting point of 358 ℃ ~ 360 ℃. It has small solubility in most organic solvents, excellent thermal stability and can withstand high temperature of 375 ℃. It is the best variety of heat resistance among all brightener commodities. Therefore, it is especially suitable for engineering plastics with high melting point, such as polysulfone resin. Scope of application: OB-1 is mainly used for whitening polyester resin stock solution and polyester fiber. It can also be used for whitening nylon, ABS, EVA, hard PVC (caution in soft PVC), polycarbonate, etc. Its toxicity is very low. After strict control, it can be used for whitening plastic products for food packaging. Special note: at present, our company divides OB-1 into different grades according to different appearance. As a refined product, ob-1t has better whiteness than OB-1 of other grades. The whitening effect of OB-1 of other grades is basically the same, but the appearance is different.
(2) appearance and properties of KCB: the appearance of KCB is yellow green crystalline powder, the melting point is 210 ℃ ~ 212 ℃, insoluble in water, but soluble in common organic solvents, and its fluorescence color is blue. Scope of application: it is used to whiten plastic film, film pressing molding materials, injection molding materials, plexiglass, EVA foamed plastics and rubber products, as well as polyester, paint and natural paint. Even if it is used at a very high concentration (such as 0.1% for soft PVC), it has good migration resistance. It has good light fastness in solution.
(3) appearance and properties of fp-127: the appearance of fp-127 is yellow white powder, the melting point is 216 ℃ ~ 221 ℃, soluble in some organic solvents, and its fluorescent tone is blue. Scope of application: it can be used for whitening PVC, thermoplastic rubber, polyamide, PS and polyurethane, and can withstand the processing temperature of these plastics. In nylon fiber, it has good light fastness. When used in soft PVC, if it is used with white pigment, it still has high migration fastness when its addition amount is as high as 0.05%. It has very low toxicity and has been approved by many governments. It can be used for whitening plastic products for food packaging.
(4) OB ￠ appearance and properties: OB is a crystalline powder with the appearance of ￠ and the melting point is 200 ℃ ~ 202 ℃. It has an appropriate amount of solubility in most organic solvents, and its fluorescent tone is pure blue. It has good sun fastness, excellent thermal stability and high chemical stability.
Scope of application: it has a wide range of applications. It is widely applicable to the whitening of various plastics (such as PVC / PS / ABS / PE / PP / PC / PET / PMMA), varnishes, coatings, printing inks and man-made fibers. It can significantly improve the brightness of colored plastics and products. OB has very low toxicity and has been approved by many governments. It can be used for whitening plastic products for food packaging.