Fluorescent Brightener SBL-1

SBL-1 is a fluorescent brightener of 6-sulfoacid type, is particularly suitable for surface coating and size press, and has an extremely obvious effect of increasing the whiteness of paper.

Application of SBL-1 in surface coating
Extremely high whiteness can be realized by applying the SBL-1 to surface coating together with natural and synthetic adhesives and industrial pigments within the pH range of 7-11. The whitening effect is related to the type and quantity of adhesives like CMC, PVA and synthetic products.

Application of SBL-1 in size press
SBL-1 can be applied to size press liquid in material-based compatible with PVA, CMC and pigment liquid when added with solubilized and/or modified starch. The performance of SBL-1 is nearly not influenced by the pH of raw paper.

Properties

Chemical structure: toluylene disulfonic acid derivatives

Appearance: transparent liquid from yellow to yellowish brown

Strength: 100±3 (based on standard samples)

Specific gravity (25℃): about 1.1 g/cm3

Storage stability: SBL-1 is high in low-temperature storage stability, and can be frozen when placed at the temperature of less than 10℃ for a long time. The frozen product can be restored to the original state without the loss of effects at room temperature or at the temperature of no more than 50℃.

Colored Light
SBL-1 emits slight-red light in all applications, cannot be yellowed even at high concentration, is environment-friendly and toxic, should be stored, transported and used according to the conventional sanitary safety rules for the storage and transportation of chemicals, and cannot be swallowed.

Application

Application of SBL-1 in coating
SBL-1 can be used in coated paper with high whiteness and extremely-high whiteness.
Because SBL-1 has low affinity to coating pigments and a synthetic adhesive formed by copolymerizing acrylic ester and butylbenzene, carriers must be used, for example, the whiteness can be improved to the maximum extent when 1.0% carriers are used together with SBL-1; carriers such as PVA, CMC, starch and synthetic adhesives are suitable for SBL-1. SBL-1 is mixed with coating materials within the pH range of 7-11.
Average dosage: 1.5–4.0 parts, based on coating pigments

Application of SBL-1 in size press
SBL-1 is used for high & extremely-high whiteness, but other brighteners cannot reach the effect because of yellowing.
SBL-1 has medium affinity to cellulosic fibers and has an extremely-stable whiteness value in size press. SBL-1 has equivalent effects on the accompanied application of starch used in size press, PVA, CMC and negative ions or a small amount of positive ions and synthetic sizing additives.
Average dosage: 5-40 g/L press sizing liquid