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ArtistSupplySource.com » Drawing & Illustration » » » Natural Pigments Laropal A 81 (500 g)
 

Natural Pigments Laropal A 81 (500 g)

SKU : NAP-510-33LA50
The minimum order amount for this product line is $30.00
Natural Pigments Laropal A 81 (500 g)
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 1   US$ 26.32 
 2   US$ 26.16 
 3   US$ 26.07 
 4-5   US$ 26.00 
 6-7   US$ 25.91 
 8-11   US$ 25.85 
 12+   US$ 25.75 
 
Price: US$ 26.32
Quantity:
 
 
 
Subtotal:
US$ 26.32






Product description

Details

Laropal A 81, which is manufactured by BASF, is a condensation product of urea and aliphatic aldehydes. This low molecular weight resin comes in the form of small pale color pellets. It has a glass transition temperature (Tg) of 57 °C. Its very pale color and good pigment wetting are two properties that make Laropal A81 particularly suitable for producing all-purpose pigment preparations. The low viscosity of its solutions enable high-pigment content pastes to be produced.

This pale, yellowing-resistant aldehyde resin is soluble in almost all paint solvents and compatible with practically all coatings materials. Its main uses are combination with other resin binders and the production of all-purpose pigment paste.

Properties
Property Unit Amount
Softening range (DIN 53180)   °C 80–95
Iodine color (DIN 6162)   max. 3
Acid value (ISO 3682, DIN 53402) mg KOH/g max. 3
Density @ 20 °C (ISO 2811, DIN 53217) g/cm3 approx. 1.11
Hydroxyl value (ISO 4629) mg KOH/g approx. 40
Saponification value (ISO 3681, DIN 53401) mg KOH/g approx. 50
Glass transition temperature Tg (DSC) °C approx. 57

Occasional slight fluctuations in color are unavoidable, but do not affect the product’s performance characteristics.

Solubility

Laropal A 81 is soluble in all common paint solvents but insoluble in water. Its solubility/diluent tolerance in aliphatic solvents such as mineral spirit is limited. Such solutions tend to separate, particularly at temperatures below 15 °C, but can be stabilized by the addition of 2–5% of an aromatic solvent (eg, Solvesso® 100*).

Compatibility

Laropal A 81 is compatible with many coatings materials including:

• alkyd resins
• cellulose nitrate
• cellulose acetobutyrate
• vinyl chloride copolymers
• chlorinated rubber
• hydroxypolyacrylates
• melamine-formaldehyde resins
• aromatic and aliphatic epoxy resins
• hydrocarbon resins
• phthalate plasticizers

Applications

Laropal A 81’s excellent solubility and compatibility enable it to be used in many types of paints. t can be used to improve gloss, hardness, body, adhesion and yellowing resistance, depending on the coating’s intended application.

A very pale color and good pigment wetting are two properties that make Laropal A 81 particularly suitable for producing all-purpose pigment preparations. The low viscosity of its solutions enable high-pigment-content pastes to be produced.

Since it has good heat resistance, Laropal A 81 is also used for baking finishes, particularly since it does not cause any odors or discoloration of the resin.





Natural Pigments

Natural Pigments is a limited liability company based in Willits, California. We manufacture and distribute rare and hard-to-find materials for fine artists and decorators. We specialize in supplying artists' materials that were used in historical painting since pre-historic times up to and including the nineteenth century.

We constantly search for materials and products of the finest quality so that we can bring them direct to you from the source. To do so, we travel the world to find materials specifically for use by professional artists and decorators. We obtain minerals from mines in Afghanistan, Chile, Russia, Ukraine and Uzbekistan, to name a few places, processing these into natural pigments. We purchase resins, gums and plants from India, Kenya and Malaysia to make natural varnishes and painting mediums.

Our mission is to provide the largest variety of natural pigments, paints and other professional artists' supplies, enabling us to bring you a selection that makes shopping for rare and hard-to-find art materials easy. Our objective is to promote the education and use of these materials among artists by providing detailed information for their employment in encaustic, fresco, oil, watercolor and tempera painting.
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This product is shipped from our warehouse in Gretna, NE, USA.
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
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