As printed materials such as stamps and printer ribbons, the inkjet ink used for printing needs to be used for a long time. Therefore, pigments with excellent lightfastness and water resistance are required as the coloring components of the ink. It is necessary that the main components of the pigment micro-particles can be evenly dispersed to avoid agglomeration caused by poor dispersion. If the inkjet ink has poor performance in terms of dispersion stability and viscosity, This will make the printed portrait and handwriting unsatisfactory. In addition, as the long-term use of the inkjet printing equipment may cause local temperature rise, the ink is also required to have a certain degree of temperature stability.The ink for ballpoint pens and the addition of PP-K30 in the ink play a role in protecting the colloid, thickening and increasing viscosity, making the writing smooth, without overflow or fading. It can also reduce the…

When the content of the substrate pigment is high, the thixotropy is obvious, the fluidity is poor, and the film is easy to protruding. However, if PVP and other leveling agents are added to the styrene acrylic emulsion, a coating with high pigment content (non-volatile content of more than 70%), high viscosity, good leveling and smooth film can be obtained, and a smooth coating can be obtained by pressing, and the paint amount is less, the luster is good, and the pollution resistance. In recent years, the use of microencapsulation technology can further improve the dispersion stability of pigments, improve the covering ability and anti-fouling properties of coatings. In this paper, vinylpyrrolidone was polymerized in a suspension system composed of pigment and water, the solid particles were dispersed at the same time, and then vinyl acetate monomer and butyl acrylate were introduced to polymerize on the surface of solid particles…

Dimethyl sulfoxide DMSO is dimethyl sulfoxide and has a wide range of uses. Used as a solvent for acetylene, aromatics, sulfur dioxide and other gases and as a spinning solvent for acrylic fibers. It is a very important aprotic polar solvent soluble in both water and organic solvents. It is highly permeable to the skin and helps the drug penetrate into the human body. It can also be used as an additive to pesticides. It’s also a very important chemical agent. DMSO is also a osmotic protective agent, which can reduce the freezing point of cells, reduce the formation of ice crystals, reduce the damage of free radicals to cells, and change the permeability of biofilms to electrolytes, drugs, poisons and metabolites. However, studies have shown that DMSO has serious toxic effects, interacts with protein hydrophobic groups, leads to protein denaturation, and has vascular toxicity and hepatorenal toxicity. DMSO is…