Characteristics of Powdered Fluorescent Whitening Agents

Although fluorescent brighteners have more dosage forms, powdery fluorescent whitening agents are still the primary product formulations. It is suitable for various types of fluorescent whitening agents. It has the advantages of strong habitual ability of processing equipment, simple operation, low production skills, convenient packaging and transportation, and good storage stability of products. It is suitable for countries and regions where the storage and transportation cycle is relatively long and the climate change is great.

Together, due to the small particle size of the powder fluorescent whitening agent, in the process of production and use, it simply causes dust to fly up and pollute the environment. This is the defect of the powder formulation. Some dust-proofing agents, such as paraffin oil, alkyl benzene, low polymerization degree of polyoxyethylene, alkyl phosphate and so on, can be added to make dust-proof powder fluorescent whitening agent. It is better to take part in a few surfactants in the dustproof agent, so the surfactant can be alkyl phenol ethylene oxide adduct, fatty alcohol ethylene oxide adduct, polyoxyethylene ether of polyol fatty acid ester and so on, most of which are non-ionic.

Powdery fluorescent brightener products are often added with various other additives and diluents, such as sodium sulfate, sodium chloride, urea, dioctyl phthalate or polyvinyl chloride and dispersants; can also be used as concentrate, with a small number of additives or completely without. The method of processing the concentrate is determined according to its application object. As for the pre whitening materials used for making up data, commonly used brighteners with high purity do not increase auxiliaries. Fluorescent whitening agents are suitable for powdery dosage forms under the following conditions.

1. Small-scale, intermittent production of enterprises, this situation - generally more economical box-type drying method, more than a thousand drying into lumps, after thousands of destruction into powder.

2. fluorescent whitening agent is low in heat resistance and suitable for other granulating methods.

3. the limitation of the equipment of the production plant does not have other granulation conditions.

4. fluorescent brighteners with specific uses.