Polyvinylpyrrolidone, or PVP, is a non-ionic polymer that is the most distinctive, best-studied and widely studied fine chemical among N-vinylamide polymers. Has developed into non-ionic, cationic, anionic 3 categories, relative molecular weight from thousands to more than one million homopolymer, copolymer and crosslinked polymer series products, and with its excellent unique properties have been widely used. Polyvinylpyrrolidone, as a polymer surfactant, can be used as dispersant, emulsifier, thickener, leveling agent, particle size regulator, anti-reprecipitating agent, coagulant, co-solvent and detergent in different dispersion systems.
Application: Polyvinylpyrrolidone can combine with phenols and alkaloids to form a complex to remove phenols and alkaloids from plant samples, which can prevent these substances from modifying proteins and interfering with spectrophotometry to measure protein content; Increased enzyme stability. PVP is widely used as an excipient in pharmaceutical preparations.
Main use
Membranes, adhesives, ceramics, inks, printing, fibers, textiles, personal care, semiconductors for batteries, dialysis and water treatment
Use classification
Life-related materials
Environment and water treatment
Coating and plating
Life science
Functional classification
Attach/join/bond
Dispersion/flocculation/surface activity
Wash/purify/dissolve
Basic information
Structural formula
The CAS number is 9003-39-8
Product details
Polyvinylpyrrolidone (PVP) is a non-ionic water-soluble polymer with the following characteristics, which can be used in a variety of applications and fields.
Solubility in various solvents (e.g., water, alcohols, amides, chlorine)
Heat resistance (Tg=160-170℃)
High hygroscopicity
Film-forming property
Gumming property
complexability
Product grade (powder product representative character value)
| Product number | K－30 | K－85 | K－90 |
|---|---|---|---|
| appearance | White powder | White powder | White powder |
| K*1 | 27.0～33.0 | 83.0～87.0 | 88.0～96.0 |
| Solids, wt% | ≧95.0 | ≧95.0 | ≧95.0 |
| Moisture, wt% | ＜5.0 | ＜5.0 | ＜5.0 |
| Residual monomers （NVP），ppm | ＜100 | ＜100 | ＜100 |
| pH*2 | 3.0～7.0 | 5.0～9.0 | 5.0～9.0 |
Example of use
| Areas of use | Advantages of PVP: | |
|---|---|---|
| battery | Dispersants | Dispersion of carbon materials and metal oxides It can be dissolved in water or NMP to make it slurry |
| Membranes for dialysis/water treatment | Solubilizer Hydrophilic agent Pore-forming agents | It is dissolved in amide solvents and evenly dispersed into substrates such as polysulfone High hydrophilicity, the water washing of the membrane creates pores, and the surface of the hydrophobic membrane becomes hydrophilic |
| Adhesive | Pressure-sensitive adhesives Rewetting adhesives | Adhesion to a wide range of substrates such as plastics, glass, and metal High hydrophilicity, high water absorption High security |
| ceramics | Adhesive Dispersants | The dispersion of metal oxides is excellent Adhesion to a wide range of materials |
| Inks, Printing, Fibers, Textiles | Dispersants Sizing agent | Pigment dispersion and adhesion Easily water-soluble |
| Personal care | Styling agent Tackifiers Wetting agents | High adhesion and easy water solubility Foam stability hydrophilicity |
| semiconductor | Resists Slurry Cleaning fluid | It is easily water-soluble and inorganic dispersible |
Function details
Excellent menstrual stability
In the presence of air, the K value decreased less, showing a higher time stability.
Excellent hygroscopicity
Compared with other water-soluble non-ionic polymers, it shows higher hygroscopicity.
Excellent viscosity stability
For changes in salt concentration or pH, an aqueous solution with stable viscosity can be obtained.
Excellent adhesion
It has good adhesion to various substrates.
| substrate | decide |
|---|---|
| PET film | ○(no peeling) |
| Nylon film | ○ |
| Soft PVC film | ○ |
| PP film (corona treatment) | ○ |
| PP film (no treatment) | × (stripping) |
| epoxy resin | ○ |
| Polyurethane resin | ○ |
| 铁 | ○ |
| 铝 | △ (Partial Stripping) |
| glass | ○ |
Method: Tape stripping (25℃, 65%RH)
Excellent heat resistance
Compared with other water-soluble non-ionic polymers, it exhibits higher heat resistance.
Thermal decomposition reaction (device: THERMOFLEX TG8110/ Rigaku motor)
Q&A
What is the metal content?
The following data are available for reference.
K85: ≦10ppm (color rendering in lead, acid sodium sulfide solution)
K30: ≦5ppm (ICP-MS)
What is the particle size?
The average particle size is shown below.
K90, K85: about 300μm
K30: About 100μm
How to store?
It will absorb moisture from the air, so it is recommended to use a container that is isolated from the air. (e.g. Aluminum foil inner bag, heat sealing)
