polyvinylpyrrolidone k90 properties

Polyvinylpyrrolidone k90 properties
Povidone PVPK90 is a strong bonding polymer! Divided into solid powder and liquid, light yellow to white powder or aqueous solution, easily soluble in water and a variety of organic solvents, with good hygroscopicity, film formation, complexation and physiological compatibility. PVPK90 is used as adhesive and thickener in different systems, and has good bond stability.

PVP (polyvinylpyrrolidone) K-90 polymer is a hygroscopic amorphous polymer. It is a linear non-ionic polymer, soluble in water and organic solvents, and pH stable. It forms a hard glossy transparent film and has bonding and cohesion properties.

Product characteristics

1, polyvinylpyrrolidone (PVP) can be plasticized with water and the most common organic plasticizers. It is considered physiologically inert.

2, high polarity, easy to form complexes with hydrogen donors (such as phenol and carboxylic acid) and anionic dyes and inorganic salts.

3, dispersion, the composition of the mixture through the polyethylene pyrrolidone uniform distribution.

4, hydrophilic, PVP water solubility is its main characteristics.

5, adhesion, using a higher molecular weight PVP formula in an aqueous medium, and then evaporating enough water to generate a solid product for the desired application.

6, viscosity, through a variety of dry mixing granulation technology to obtain viscous strength.

[Recommended dosage] 0.5-5%

Application: The application of PVP in binders, PVP on glass, metal and plastic surface has a special bonding force; Coupled with its characteristics of hydrophilicity, dispersion stability, non-thixotropy, thickening, etc., it is widely used in various binder formulations.
As the main component of adhesives, PVP is the most widely used in industry, such as solid glue sticks, pressure sensitive adhesives and rewet adhesives. Due to its excellent adhesion to glass, PVP is used as a glazing agent for glass fibers to make the surface of glass fibers smoother, reduce wear during stretching, and increase the adhesion of cellulose. PVP can be used as slurry, pigment and other dispersant and binder in fine ceramic processing. It is also a forming binder for all types of industrial or civilian tablets and granules. PVPK30 and PVPK90 are good binders for gypsum binding.

Because PVP has excellent adhesion to glass, it is used as a glazing agent for glass fibers to make the surface of glass fibers smoother, reduce wear during stretching, and increase the holding force of fiber bundles. Phenolic resin, saturated polyester resin cellulose derivatives, vinyl acetate/methyl methacrylate resin can be combined with PVP to form glass fiber glazing agent. Some formulations have been applied in some large glass fiber factories in China.
According to the same reason, PVP can also be used for the preparation and processing of many inorganic fibers such as carbon fiber, Al2O3 fiber, magnesium titanate fiber, and increase the bonding force of fiber and resin composite.
When glass, ceramics, quartz, asbestos, mica and other inorganic materials are used to prepare highly flexible and special paper, PVP can often disperse and bond the fibers and improve the strength of the paper.
PVP in fine ceramic processing, high dimensional precision sintered ceramics, controlled magnetic sintered ceramics, flexible ceramics, ceramic surface coating, ceramic, glass printing ink, porcelain glaze, nickel plated steel enamel glaze can be used as slurry, pigment dispersant, binder and has been widely paid attention to and applied. In ceramic processing, PVP can be completely burned during sintering. Therefore, there is no effect on the ceramic itself. PVPK90 also prevents the cracking of ceramic products before sintering. In glazes and inks, PVP’s affinity for pigments and dyes ensures uniform, stable and high adhesion of glazes and inks.
PVP is a forming binder for all types of industrial or domestic tablets and granules, such as cleaning tablets for dentures, painting paint tablets for children, sheet and block cleaning agents for household or industrial use. It is also used as a binder for the forming of pharmaceutical tablets and granules.
PVPK30 and PVPK90 are good binders for the manufacture of gypsum bandages. PVP is dissolved in organic solvent such as methanol to generate methanol-pvp solution, the gypsum is dispersed in it, and then the suspension is applied to the bandage. After drying, the gypsum bandages with good plasticity and uniformity can be obtained, which reduces pulverized powder and increases elasticity and fastness.
As the main component of adhesives, PVP is the most widely used in industry, such as solid glue sticks, pressure sensitive adhesives and rewet adhesives.