Color toner and preparation method thereof

Abstract

The invention discloses color toner which comprises the following components in parts by weight: 60-80 parts of styrene, 15-25 parts of butyl acrylate, 3-7 parts of composite wax, 3-6 parts of pigment, 0.2-1.5 parts of charge regulator, 1-2 parts of ammonium persulfate, 0.1-2 parts of molecular weight regulator, 1.0-3.0 parts of surfactant and 1-4 parts of silicon dioxide, wherein the composite wax comprises two or more of carnauba wax, polypropylene wax or C80 paraffin. According to the invention, the composite wax is added in the emulsion preparation stage, so that the polymerization speed can be properly reduced in comparison with the use of single wax, thus improving the toughness and printing durability; the use of the composite wax can lower the cost and ensure that the prepared color toner has better emulsibility, better gloss, better hardness and better stability; and the color toner is narrow in particle size distribution and has an average particle size D50 of 5-8 mu m, so that the particle size is easy to control.

Description

technical field [0001] The invention relates to the application field of electrostatic imaging technology, in particular to a color toner for copiers and printers and a preparation method thereof. Background technique [0002] Color toner is a key consumable for color laser printing and color digital copying, mainly composed of resin, pigment, additives, etc. With the development of information technology, network technology, office automation and modernization, as well as the popularization of laser printers, laser digital copiers, and digital cameras, and the development in the direction of digitization and colorization, the demand for color toner is increasing. Quality requirements are also getting higher and higher. [0003] At present, the preparation methods of color toner mainly fall into two categories: physical method and chemical polymerization method. The physical method, also known as "melting method", is to heat and knead resin (mainly styrene-butyl acrylate c...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the "suspension polymerization method" is that the wide particle size distribution of the color toner makes the printing and copying resolution and color poor, and the color toner particles are too round, which leads to the recovery and cleaning of the color toner remaining on the photoreceptor. difficulty

Zhou Xueliang, Zhang Weigang, Zhou Dongliang, etc. used in-situ emulsion polymerization to prepare color toner for printers and copiers. By selecting styrene, butyl acrylate, polyester resin, polypropylene wax, azo pigments, charge regulators, and azobis Raw materials such as isobutylcyanide, surfactant and silicon dioxide are made of color toner through steps such as reaction, separation, cleaning, drying and modification; however, there are few literatures and reports on the research of wax in emulsion polymerization. In particular, the complex wax is mixed evenly in the emulsion preparation stage, thereby improving the printing durability of the color toner, and finally improving the quality of the color toner. There are few reports