KURARAY POVAL 18-88

KURARAY POVAL 18-88 is an odor-free material used in adhesives and sealants and paints and coatings as an auxiliary agent, binder and resin, dispersant, and protective colloid agent, supplied in granule and powder form.
KURARAY POVAL 18-88 features water-solubility, excellent film forming characteristics, high tensile strength and elasticity, as well as resistance against organic solvents and dispersing power.
KURARAY POVAL 18-88 is a water-soluble, partially saponified, polyvinyl alcohol (PVOH) grade manufactured by alcoholysis of polyvinyl acetate.

CAS Number: 25213-24-5
EC Number: 200-778-4
Chemical Formula: (C2H4O)n

Synonyms: Polyvinyl alcohol, PVA, PVOH, Poly(vinyl alcohol), Vinyl alcohol polymer, Polyethenol, Hydrolyzed polyvinyl acetate, Partially hydrolyzed PVA, PVAL, Elvanol, Gohsenol, Mowiol, Airvol, Selvol, Alcotex

KURARAY POVAL 18-88 is a water-soluble, partially saponified polyvinyl alcohol (PVOH) grade produced by Kuraray.
KURARAY POVAL 18-88 is a non-ionic polymer with uniform chemical structure, good adhesion, and reliable film-forming performance.

KURARAY POVAL 18-88's PVOH resins as materials valued for water solubility, film formation, tensile strength, and dispersing power across adhesives, paper, textile, construction, ceramics, packaging, and electronics applications.
KURARAY POVAL 18-88 specifically note its use as an adhesive promoter and protective colloid in polymer emulsion systems.

KURARAY POVAL 18-88 is an odor-free material used in adhesives and sealants and paints and coatings as an auxiliary agent, binder and resin, dispersant, and protective colloid agent, supplied in granule and powder form.
KURARAY POVAL 18-88 is the brand name of Kuraray’s globally produced polyvinyl alcohol (PVOH).
KURARAY POVAL 18-88 features an extremely wide-ranging field of applications.

The main uses are in the paper, adhesive, textile and construction industries, as well as in ceramics, packaging and electronics.
The physical and chemical properties make PVOH very versatile.
KURARAY POVAL 18-88 features water-solubility, excellent film forming characteristics, high tensile strength and elasticity, as well as resistance against organic solvents and dispersing power.

KURARAY POVAL 18-88 is a partially saponified grade of polyvinyl alcohol.
KURARAY POVAL 18-88 is supplied as fine powder/granules with defined grain size.

KURARAY POVAL 18-88 is recommended for a variety of uses, ranging from emulsion polymerization aids to binders for pigments in paper applications.
KURARAY POVAL 18-88 has a viscosity of 16.5 - 19.8 mPa.s.

KURARAY POVAL 18-88 is the brand name of Kuraray’s globally produced polyvinyl alcohol (PVOH).
KURARAY POVAL 18-88 is used in a broad range of applications.

KURARAY POVAL 18-88 is a water-soluble, partially saponified, polyvinyl alcohol (PVOH) grade manufactured by alcoholysis of polyvinyl acetate.
KURARAY POVAL 18-88 is used as adhesive promoter and protective colloids in the polymerization of polymer emulsions.

KURARAY POVAL 18-88 exhibits uniform chemical structure and good adhesion.
Aqueous solution of KURARAY POVAL 18-88 can be added to polymer emulsion which is already stabilized with polyvinyl alcohol to extend the open time, increase setting speed and influence the rheology.

KURARAY POVAL 18-88 is suitable for modification of emulsion adhesives and remoistenable adhesives in the paper processing industry.
KURARAY POVAL 18-88 is designed for use in postage stamps & labels, envelopes and Jiffy®-type bags.
KURARAY POVAL 18-88 can be stored for 12 months from the date of shipment.

Uses of KURARAY POVAL 18-88:
KURARAY POVAL 18-88 is widely used in water-based adhesive formulations as an effective adhesive promoter, providing strong bonding performance and controlled viscosity.
KURARAY POVAL 18-88 is commonly applied as a protective colloid in emulsion polymerization to stabilize polymer dispersions and ensure uniform particle formation.
KURARAY POVAL 18-88 also functions as a binder and dispersant in coatings, paints, and sealants, improving film strength and surface uniformity, while additionally being utilized in paper processing, ceramics, and construction applications where reliable adhesion and film-forming properties are required.

Characteristics of KURARAY POVAL 18-88:

Solubility:
KURARAY POVAL 18-88 dissolves in water.
The higher the water temperature, the quicker the rate of dissolution.

These products have extremely high oil resistance, and are insoluble in most organic solvents.
However, they dissolve in certain organic solvents such as glycols, DMSO and phenol.

Acid and alkaline resistant:
These materials are mostly unaffected under weak acid or alkaline conditions.

Thermal stability:
The melting point and temperature at which KURARAY POVAL 18-88 starts thermal decomposition are close together, with gradual decomposition at 180ºC or higher.

Film-forming:
Easily converted to threads or films, and the physical properties, including tensile strength, tear strength and abrasion strength, are excellent compared with other synthetic resins.

Hygroscopicity:
Lower hygroscopicity than other water-soluble polymers, and any changes caused by varying humidity are relatively minor.

Stability and Reactivity of KURARAY POVAL 18-88:

Chemical stability: 
Stable under normal conditions.

Reactivity: 
Low.
Avoid strong oxidizing agents.

Conditions to avoid: 
Heat.
Ignition sources.
Moisture.
Dust formation.

Incompatible materials: 
Strong oxidizers.

Hazardous decomposition: 
Carbon monoxide (CO) may form.
Carbon dioxide (CO₂) may be generated.
Irritating fumes may be released.

Handling and Storage of KURARAY POVAL 18-88:

Handling: 
Avoid dust inhalation.
Avoid eye contact.
Use good industrial hygiene practices.

Storage: 
Store in a cool, dry, and well-ventilated place.
Keep container tightly closed.
Recommended shelf life is 12 months.

First Aid Measures of KURARAY POVAL 18-88:

Inhalation: 
Move to fresh air.

Skin contact: 
Rinse thoroughly with water.

Eye contact: 
Rinse thoroughly with water.

Ingestion: 
Rinse mouth.
Seek medical advice if necessary.

Firefighting Measures of KURARAY POVAL 18-88:

Suitable extinguishing media: 
Water spray.
Foam.
Carbon dioxide (CO₂).
Dry chemical.

Hazards: 
Dust explosion risk may be present.
Toxic fumes may be released during combustion.

Protection: 
Use self-contained breathing apparatus.

Accidental Release Measures of KURARAY POVAL 18-88:

Precautions: 
Avoid dust generation.
Ensure adequate ventilation.

Cleanup: 
Sweep or vacuum spilled material.
Collect into suitable containers.

Exposure Controls / Personal Protection of KURARAY POVAL 18-88:

Ventilation: 
Provide adequate ventilation.

Personal protective equipment: 
Use gloves.
Use safety glasses.
Use dust mask or respirator if needed.

Identifiers of KURARAY POVAL 18-88:
HS Code: 390530
Commodity Code: 39053000
CAS Number: 25213-24-5;67-56-1
Product Number:  271954

CAS number: 9002-89-5
EC number: 200-778-4
Chemical formula: (C₂H₄O)n
Chemical type: Partially hydrolyzed polyvinyl alcohol
Grade designation: 18-88 (≈18 mPa·s,~88% hydrolysis)

Properties of KURARAY POVAL 18-88:
Appearance: White to off-white powder or granules
Odor: Odorless
Solubility: Soluble in water;insoluble in most organic solvents
pH (4% solution): Approximately 5–7
Viscosity (4% solution): ~18 mPa·s
Degree of hydrolysis: ~86.5–89.0 mol%
Density: ~1.2–1.3 g/cm³
Melting point: Decomposes before melting (~180–230°C)
Film forming: Excellent film-forming properties
Ionic character: Non-ionic
Moisture sensitivity: Hygroscopic