PVOH
Seed CoatingApplications

Kuraray Poval™

PVOH forseed coating

About Polyvinyl
Alcohol (PVOH)

Why PVOH for
Seed Coating?

Its physical and chemical
properties are what make PVOH
very versatile, and ideal foruse in seed coating. It featureswater-solubility, excellent film
forming characteristics, hightensile strength and elasticity, as
well as resistance against organic
solvents, dispersing power, and it
is inherently biodegradable when
dissolved in water.

When seeds are coated with polyvinyl alcohol, they are protectedby PVOH film, and the watersolubility and mechanical strengthof the film can be controlled.
PVOH coatings decrease dusting,
improve germination and can becoated in a variety of ways.

Polyvinyl Alcohol’s
Unique Characteristics in Seed Coatings
Low dust-off properties
Improved germination
High bonding power
Inherently biodegradable

Low Dust-Off Properties
Dust generation of the soybean seed was suppressed bycoating with PVOH. The coating layer containing PVOH adheres well to the seed surface.

Figure 1. Dust generation of soybean seedNo PVOH
Kuraray Poval™ 5-88
Kuraray Poval™ 22-88
00.0050.010.015

0.02

Grams of Dust / 100,000 Seeds*Coating solution contained pesticides and pigment.

Improved Germination
Based on the result of Figure 2, PVOH coating on seeds did
not show a negative impact on germination. And as shownin Figure 3, the cold germination rate of soybean seed wasimproved by coating with PVOH. It may be because PVOH
controls proper moisture content for germination.

Figure 2. Warm germination of soybean seed

Figure 3. Cold germination of soybean seed

No PVOHNo PVOH

Kuraray Poval™ 5-88

Kuraray Poval™ 5-88

Kuraray Poval™ 22-88

Kuraray Poval™ 22-88
808590% Germination

95

100808590% Germination

95

Inherently biodegradable
PVOH is recognized as one of the very few vinyl polymers
which are water soluble and inherently biodegradable in waterin the presence of micro-organisms. The biodegradability ofPVOH is affected by its specification or biodegradation condition.

Why Kuraray?
Kuraray is committed to product quality, innovationand the ability to provide global solutions to our customers. This means that we produce high-quality, low
VOC and ash-content PVOH with the most narrowand strict specifications. We create tailor-made, oneof a kind products for our customers and are oftensought out to be partners in innovation. Globally, we
have the ability to second source from around theworld, as well as leverage our local sales, logistics andR&D teams in Europe, Asia and the Americas. Kuraray
is committed to developing new fields of business using our pioneering technologies like Polyvinyl Alcoholthat will improve the environment and enhance thequality of life for all.

100

Adding value toyour products –worldwide
Kuraray Poval™, Exceval™, Elvanol™ and Mowiflex™ are the trademarks for polyvinyl alcohols
made by Kuraray. Their key characteristics — outstanding film-forming properties and high binding strength — add real value to your products. Our polymers are water-soluble, highly reactive,
crosslinkable and foamable. They have high pigment binding capacity, protective colloid characteristics and thickening effects. The physical and chemical properties of Kuraray Poval™ makeit ideal for a wide variety of applications, ranging from adhesives through paper and ceramics
to packaging films. Many of our polymers are food contact-approved and thus suitable for foodapplications. Ecologically Kuraray Poval™ is advantageous due to its biodegradability and the factthat combustion does not generate residues. It is available in various particle sizes from granules
to fine powders.
Kuraray produces its wide range of Kuraray Poval™ grades in Japan, Singapore, Germany and theUSA. Kuraray’s global production and service network make us your partner of choice for innovative high-quality PVOH resins.
Kuraray – Here to Innovate.

Headquarters
Kuraray Co., Ltd.
Tokiwabashi Tower
2-6-4, OtemachiChiyoda-ku
Tokyo, Japan 100-0004
Phone: +81 3 67 01 1000
infopoval.jp@kuraray.com

Kuraray Poval™
product portfolio
Please contact your local
Kuraray office to discuss theright Kuraray product foryour needs.

Kuraray America, Inc.
2625 Bay Area Blvd.,
Suite 600 Houston, TX77058
United States of America
Phone: +1 800 423 9762

Kuraray Asia Pacific Pte., Ltd.
250 North Bridge Road
#10-01/02 Raffles City Tower
Singapore 179101
Phone: +65 6337 4123

info.kuraray-poval@kuraray.com

infopoval.sg@kuraray.com

Kuraray Europe GmbH
Philipp-Reis-Str. 465795 Hattersheim am Main,Germany
Phone: +49 69 305 85 351

Kuraray China Co., Ltd.
Unit 2207, 2 Grand Gateway
3 Hongqiao Road, Xuhui District,
Shanghai 200030, China
Phone: +86 21 6119 8111

info.eu-poval@kuraray.com

infopoval.cn@kuraray.com

05_2023