Joncryl 651

Technical Data Sheet
Product Description Joncryl® 651 is an emulsion of a specialty resin developed for waterborne inks.
Key Features & Benefits - Good pigment wetting properties
- Rapid resolubility
- Hydrophilic nature of the polymer
- Excellent viscosity/pH stability
- Near linear viscosity/dilution curve
Chemical Composition Carboxylated acrylic copolymer in water
Properties
Product Specifications Appearance at 25°C white liquid
Weight, dry 57.0 – 61.0%
Viscosity at 25°C (DIN4 flow cup) 77 – 109 seconds
Typical Characteristics Appearance white liquid
Solid Content 60%
pH 3 – 4.0
Acid value (as 100%) 77
Viscosity at 20°C (Brookfield 20 rpm) 200 cps
Density at 20°C 1.1 g/cm3
Tg 35°C
MFFT 12°C
Softening point (initial) approx. 100°C
Applications
Joncryl® 651 is an emulsion of a specialty resin designed for use in water-based inks. This product is
recommended as an effective modifying binder in water-based flexographic inks for corrugated boxes
and kraft paper.
Joncryl® 651 is recommended for applications such as:
 Modifying binder in water-based flexographic inks for corrugated boxes and kraft paper
 Binder in poster paints or drawing inks
 Paper/paperboard coatings
Due to ease-of-use on standard printing equipment (i.e. rapid resolubility), Joncryl® 651 is also
recommended as a modifier to more expensive resin systems for high quality ink applications. Other
uses include paperboard coatings (emulsion or neutralized solution), paper coatings, or as a binder in
poster paints or drawing inks.
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Joncryl® 651 demonstrates excellent machine stability due to the hydrophilic nature of the polymer
and its excellent viscosity/pH stability in the pH range of 7.8 – 9.0, as shown in the tables below.
Viscosity Curve of Joncryl® 651
Viscosity*
pH
Viscosity Curve of Joncryl® 651
Viscosity*
pH
*Brookfield at 20 rpm, cps
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Processing For water-based inks formulated at pH 8.5, Joncryl® 651 must be pre-neutralized.
Neutralization Joncryl® 651 can easily be converted to a neutralized solution with various alkali. However, since the
polymer swells considerably when first neutralized, it is highly recommended that Joncryl® 651 be
diluted to approximately 20% solids with water prior to neutralization. The relevant alkali can then be
added with stirring to form the required solution. If the above recommendation is not taken, it is highly
likely that some localized thickening and precipitation of particles may occur. It is suggested practice
to allow the neutralized solution to stabilize before re-checking the pH and viscosity.
Although Joncryl® 651 will very quickly reach its final viscosity, it is suggested that the pH and
viscosity of the neutralized solution be periodically checked to allow it to stabilize. The neutralized
solution of Joncryl® 651 offers the advantage of building a clear solution.
Below are typical alkali used as neutralizing agents:
Alkali Weight %
Ammonia (34%) 5.5
Monoethanolamine (MEA) 5.4
Dimethylaminoethanol (DMAE) 9.1
Aminomethylpropanol (AMP) 7.2
Morpholine 9.4
Triethanolamine (TEA) 19.1
Note: Weight % of alkali to 100 grams of Joncryl® 651 for a pH 8.5
Additional Formulation Recommendations
Compatibility with Joncryl® 651 will tolerate water miscible solvents such as alcohols, glycol ethers, and low boiling
organic solvents esters or ketones. However, the tolerance is limited to about 20 – 30% of the resin solid weight.
Neutralized Joncryl® 651 has a high tolerance to pH changes but becomes rapidly insoluble when the
pH drops below 7.0.
Compatibility with Joncryl® 651 in its neutralized solution, has a wide compatibility with a variety of other water-based
other resins resins. Specifically, it is compatible with most acrylics, styrene acrylics, polyesters, and rosin-modified
maleic resins.
Compatibility with pigments Neutralized Joncryl® 651 has good pigment wetting properties and color development and is
compatible with most alkali-stable pigments. Care must be taken with certain pigments due to adverse
interactions with trace elements present in them. Specific care must be taken when using calcium and
barium lithols since trace metal ions can crosslink the polymer giving rise to gelation. High pH (above
9.0) or additions of EDTA before grinding can overcome this problem.
In order to obtain good compatibility with basic dyes, it is necessary to add up to 10% of alcohol or
glycol ether to the neutralized Joncryl® 651 and to dissolve the dyestuff in a similar solvent plus water.
In most cases, a significant increase in color development can be achieved by the use of the
neutralized Joncryl® 651 as a let-down resin for pigment grinding bases. For suitable grinding resins,
please contact our Technical Service Department.
Crosslinking Since Joncryl® 651 is a carboxylated polymer, it will crosslink with a number of reagents, principally
with urea or melamine formaldehydes, azridines, or zinc or zirconium compounds.
Recommended Concentrations Since any component present in a formulation can have significant impact on the overall ink
properties, testing compatibility and dosage level prior to use is highly recommended.
Flexographic inks May be used as a sole binder in conjunction with a grinding resin at about 7 – 20% of the total
formulation.
Safety
General The usual safety precautions when handling chemicals must be observed. These include the
measures described in Federal, State, and Local health and safety regulations, thorough ventilation of
the workplace, good skin care, and wearing of protective goggles.
Material Safety Data Sheet All safety information is provided in the Material Safety Data Sheet for Joncryl® 651.
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Important
While the descriptions, designs, data and information contained herein are presented in good faith
and believed to be accurate, they are provided for guidance only. Because many factors may affect
processing or application/use, BASF recommends that the reader make tests to determine the
suitability of a product for a particular purpose prior to use. NO WARRANTIES OF ANY KIND,
EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE MADE REGARDING
PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION SET FORTH, OR THAT THE
PRODUCTS, DESCRIPTIONS, DESIGNS, DATA OR INFORMATION MAY BE USED WITHOUT
INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS. In no case shall the
descriptions, information, data or designs provided be considered a part of BASF's terms and
conditions of sale. Further, the descriptions, designs, data, and information furnished by BASF
hereunder are given gratis and BASF assumes no obligation or liability for the descriptions, designs,
data or information given or results obtained all such being given and accepted at the reader's risk.
Joncryl is a registered trademark of BASF Group.