Polyvinylpyrrolidone (PVP) Polyvinylpyrrolidone (PVP)

Basic Information

Chemical Structure
CAS No.9003-39-8
Chemical Substances Control Act (CSCA) No. (6)-1048
Industrial Safety and Health Act No. CSCA No. is applied with necessary modifications

Product Details

Polyvinylpyrrolidone (PVP) is a nonionic, water-soluble polymer with the following features. It can be suitable for the usage of various applications and fields.

  • Soluble in various solvents (e.g.: water, alcohol, amide and chlorineated solvents)
  • Heat Resistance (Tg=160-170℃)
  • Highly hygroscopicity
  • Good film-forming properties
  • Adhesion
  • Ability to form complexes

Product Grades (Typical properties)

Product Number K-30K-85K-90
Appearance White powder White powder White powder
K-value※127.0 – 33.0 83.0 – 87.0 88.0 – 96.0
Solid Content (wt%) ≥ 95.0 ≥ 95.0 ≥ 95.0
Water Content (wt%) < 5.0 < 5.0 < 5.0
Residual Monomers (NVP) (ppm)< 100 < 100 < 100
pH※23.0 – 7.0 5.0 – 9.0 5.0 – 9.0
* The values listed in the table are not guaranteed values.
※1:Fikentscher’s value of viscosity characteristics K-value represents a viscosity index relating to molecular weight and is calculated by the following Fikentscher’s formula with relative viscosity which is measured by capillary viscometer at 25 C
K=(1.5 logηrel -1)/(0.15+0.003c)+(300clogηrel+(c+1.5clogηrel21/2/(0.15c+0.003c2
ηrel:Relative viscosity of a PVP aqueous solution to water
c: Concentration (%) of PVP in an aqueous PVP solution
*2: Value of 10% aqueous solution

Examples of Applications

Fields PVP Features
Batteries Dispersants Dispersion of metal oxides and carbon materials
Soluble in water and NMP to make slurry
Membranes for water treatment and dialysis Compatibilizers
Hydrophilic agents
Pore forming agents
Soluble in amide solvents, and disperses uniformly in polysulfones, etc.
Highly hydrophilic, Forms pores by washing membranes in water, Makes hydrophobic film surfaces hydrophilic
Adhesives Pressure-sensitive adhesives
Rewetting adhesives
Food packaging (non-contact)
Adhesion to a wide range of base materials such as plastics, glass, and metals etc.
Highly hydrophilic, highly water-absorbing
Low toxicity
Ceramics Binders
Dispersants
Excellent dispersion of metal oxides
Binds to a wide range of materials
Ink, Printing, Fibers and textiles Dispersants
Sizing agents
Pigment dispersion, binding properties
Easily water soluble
Personal care products Setting agents
Thickeners
Humectants
Highly adhesive, easily water soluble
Form retention
Hydrophilic
Semiconductors Resist
Polishing solutions
Cleaning solutions
Easily water soluble, dispersion of inorganic substances

Details of Functions

Excellent storage stability

This product has excellent storage stability, less decrease in K Value in the presence of the air.

Graph of PVP K-90 opened (Under stmosphere)

Superior hygroscopicity

This product has superior hygroscopicity compared to other nonionic, water-soluble polymers.

Graph of Superior hygroscopicity

Excellent viscosity stability

With this product, it is possible to achieve an aqueous solution with stable viscosity, even with changes in the salt concentration or pH.

Graph of Salt concentration -Viscosity curve(25℃)
Graph of ph-Viscosity curve(25℃)

Superior adhesion

This product has superior adhesion to various base materials.

Base Materials Evaluation
PET films ○ (non-peel off)
Nylon films
Flexible PVC films
PP films (corona treatment)
PP films (untreated) × (peel off)
Epoxy resin
Urethane resin
Fe
Al△ (partially peel off)
Glass
Method: Adhesive cellophane tape peel off (25°C, 65% RH)

Excellent heat resistance

This product has superior heat resistance compared to other nonionic, water-soluble polymers.

Thermal decomposition behavior (Device: Rigaku Corporation’s THERMOFLEX TG8110)

Graph of Weight(%) - Temp.(℃)

Excellent hydrophilicity

This product can make a resin’s surface hydrophilic when it is kneaded with the resin.

Examples of PET

 NonePVP 5% added
Contact angle81°67°
Water droplets on the surface  
ΔL value before and after CB contamination-32-9
* ΔL value = (L value after CB contamination and washing in water) – (L value before CB contamination)

Excellent dispersion

This product can easily disperse CB and CNT.

◆ Examples of CB

No dispersant/PVP K-30 added

Dispersed CB in water, and left for one week

◆ Examples of CNT

No dispersant/PVP K-30 added

Dispersed CNT in water, and left for one day

This product can easily disperse carbon materials,in slurry for electrode.

Graph of Viscosity comparison with the same prescription
Graph of Peel strength of coating film
Good solventPoor solvent
WaterBenzene
MethanolToluene
EthanolXylene
IsopropanolHexane
ButanolCyclohexane
CyclohexanolMineral oil
Ethylene glycolDiethyl ether
Propylene glycolTetrahydrofuran
Propylene glycol monomethyl etherDioxane
1,4-Butanediol Acetone
GlycerinMethyl ethyl ketone
Diethylene glycolCyclohexanone
Glycol etherEthyl acetate
γ-butyrolactoneCarbon tetrachloride
Chloroform
2-Pyrrolidone
N-Methylpyrrolidone
N-Vinylpyrrolidone
Acetic acid
Butyric acid
Pyridine
Triethanolamine
N,N-dimethylacetamide
Add K-30 (10 g) to solvent (90 g) at room temperature with stirring
No insolubles = good solvent, insolubles = poor solvent

FAQ

What is the metal content?
Please refer to the data listed below as reference values.
K-85: 10 ppm max. (Pb conversion, coloring from acidic sodium sulfide test solution)
K-30: 5 ppm max. (ICP-MS)
How large is the particle size?
The average particle diameter is as follows.
K-90, K-85: Approx. 300 μm
K-30: Approx. 100 μm
How should it be stored?
This is a moisture-absorbing product so we recommend storing it in an air-tight container.(e.g.: Aluminum inner bag, with a heat-sealed)