PRODUCTS

KURARAY POVAL 40-88

KURARAY POVAL 40-88 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 40-88 is a water soluble polymer with a viscosity of 38.0-42.0 mPa.s and a degree of hydrolysis of 87.0-89.0 mol%.
KURARAY POVAL 40-88 can also be used as a protective colloid which can influence the particle size distribution, viscosity, stability to stirring, freeze/thaw stability, pigment compatibility & electrolyte stability.

CAS Number: 9002-89-5
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 40-88 is a water-soluble, partially hydrolyzed polyvinyl alcohol (PVOH) grade produced by KURARAY.
KURARAY POVAL 40-88 is a non-ionic polymer with relatively high viscosity, uniform chemical structure, and strong adhesion.
KURARAY describes its 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, while product-specific listings for 40-88 emphasize its role as an adhesive raw material and protective colloid in polymer emulsion systems.

KURARAY POVAL 40-88 is a partially saponified, water-soluble, polyvinyl alcohol (PVOH).
KURARAY POVAL 40-88 has uniform chemical structure and shows great adhesion.

KURARAY POVAL 40-88 provides extension of the open time, influence on the rheology, good remoistening properties and high degree of flatness during storage under fluctuating air humidity.
KURARAY POVAL 40-88 offers minimal blocking tendency even in high air humidity and fast setting after reactivation.

KURARAY POVAL 40-88 is used as an adhesive raw material.
KURARAY POVAL 40-88 can also be used as a protective colloid which can influence the particle size distribution, viscosity, stability to stirring, freeze/thaw stability, pigment compatibility & electrolyte stability.

KURARAY POVAL 40-88 is recommended for gumming of paper on the reverse side (e.g. postage stamps and labels), envelopes & Jiffy®-type bags.
KURARAY POVAL 40-88 is suitable for modification of emulsion adhesives.

Aqueous solutions of KURARAY POVAL 40-88 can be added to polymer emulsions that are already stabilized with polyvinyl alcohol.
The shelf life of KURARAY POVAL 40-88 is 12 months.

KURARAY POVAL 40-88 is the brand name of KURARAY’s globally produced polyvinyl alcohol (PVOH).
KURARAY POVAL 40-88 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 40-88 features water-solubility, excellent film forming characteristics, high tensile strength and elasticity, as well as resistance against organic solvents and dispersing power.

KURARAY POVAL 40-88 is a water soluble polymer with a viscosity of 38.0-42.0 mPa.s and a degree of hydrolysis of 87.0-89.0 mol%.
KURARAY POVAL 40-88 has low methanol content < 0.3%, making it suitable for personal care applications.

KURARAY POVAL 40-88 acts as an excellent film former and adhesion promoter.
KURARAY POVAL 40-88 can be used to develop peel-off face masks, mascara, and other personal care products which adhere well to the skin, dry fast and can be removed in one piece.
KURARAY POVAL 40-88's biodegradable nature makes it an eco-friendly choice for personal care products.

KURARAY POVAL 40-88 is a partially saponified grade of polyvinyl alcohol.
KURARAY POVAL 40-88 is supplied as fine powder/granules with defined grain size.

KURARAY POVAL 40-88 is recommended for a variety of uses, ranging from emulsion polymerization aids to binders for pigments in paper applications.
KURARAY POVAL 40-88 has a viscosity of 38.0 - 42.0 mPa.s.

Uses of KURARAY POVAL 40-88:
KURARAY POVAL 40-88 is widely used in water-based adhesive systems as a primary adhesive raw material, providing strong bonding performance and high viscosity control.
KURARAY POVAL 40-88 is commonly applied in the modification of emulsion and remoistenable adhesives, particularly in paper processing applications such as envelopes, labels, postage stamps, and Jiffy®-type bags due to its excellent film-forming and cohesive properties.
KURARAY POVAL 40-88 also functions as a protective colloid in polymer emulsion polymerization, where it enhances stability, influences particle size distribution, and allows control over rheology, open time, and setting behavior.

Applications of KURARAY POVAL 40-88:
Abrasives
Adhesive
Building materials
Ceramics
Cosmetics
Protective colloid in emulsion polymerization
Food packaging
Paper
PVC production and compounding
Textiles
Thermoplastic processing
Oil field cementing
Glass fiber

Characteristics of KURARAY POVAL 40-88:
Medium viscosity, higher bond strength and cohesion after film formation than 18-88.

Solubility:
KURARAY POVAL 40-88 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 40-88 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.

Viscosity:
Its 4% aqueous solution has a viscosity of approximately 40 mPa·s at 20°C (the actual range is typically between 37.0 and 45.0 mPa·s).

Stability and Reactivity of KURARAY POVAL 40-88:

Chemical stability:
Stable.

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 40-88:

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.

First Aid Measures of KURARAY POVAL 40-88:

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 40-88:

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 40-88:

Precautions:
Avoid dust generation.
Ensure adequate ventilation.

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

Exposure Controls / Personal Protection of KURARAY POVAL 40-88:

Ventilation:
Provide adequate ventilation.

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

Identifiers of KURARAY POVAL 40-88:
CAS number: 9002-89-5
EC number: 200-778-4
Chemical formula: (C₂H₄O)n
Chemical type: Partially hydrolyzed polyvinyl alcohol
Grade designation: 40-88 (≈40 mPa·s, ~88% hydrolysis)

Properties of KURARAY POVAL 40-88:
form: crystals
Quality Level: 100
mol wt: average Mw ~205,000 g/mol
mp: >300 °C
InChI: 1S/C2H4O/c1-2-3/h2-3H,1H2
InChI key: IMROMDMJAWUWLK-UHFFFAOYSA-N

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): ~40 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