U. V. CURING RESINS
· Products
Zircon Ultra-Violet Cured Base Resins
Chemistry:
These types of resins are based on cycloaliphatic polyesters that will dry in air and in thin film coatings. Since these polyesters are not aromatic, as are most polyesters, yellowing in the presence of ultra-violet radiation is not a problem
Products
Styrenated Resins
Astrocure® 78-750 (Styrene monomer 25%)
Astrocure® 78-750 is a low profile (low shrink), medium viscosity resin containing diluent monomer (styrene). The product is non-air inhibited and can be cured with ultra-violet/electron beam radiation or with a room temperature or heat cured peroxide system. Combinations of surface and through cure U.V. initiators are needed to formulate Astrocure® 78-750.
Astrocure 78-750 can further be thinned with various solvents, multi-functional acrylates and other epoxy or urethane oligomers.
Suggested formulations for various applications supplied upon request.
Astrocure® 78-80 (Styrene monomer 20%)
Astrocure® 78-80 is a low profile (low shrink, medium viscosity resin containing diluent monomer (styrene). The product is non-air inhibited and can be cured with ultra-violet/electron beam radiation or with a room temperature and/or heat cured peroxide system.
The main difference between Astrocure® 78-80 and Astrocure® 78-750 is the former resin contains less styrene than the latter. This product is designed for people who do not want high levels of styrene.
Applications include sealing of wood, furniture top coats, and a variety of wood applications.
Styrene Free Resins
Astrocure® 78 Oligomer
Astrocure® 78 is a unique, low viscosity reactive, cycloaliphatic oligomer, especially tailored for application in ultra-violet/electron beam (UV/EB) radiation cured coatings.
The product can be thinned with a variety of reactive monomers including multi-functional and diluent acrylate monomers.
The oligomer is air drying in thin film applications and contains no aromatic groups.
Applications include:
· Sealers for chip board
· Sealers for wood furniture
· Sealers for plywood
· Top coats for wood furniture
· Inks
· Paper coating
· Plastic coating
· ElectronicsSuggested formulations supplied upon request.
A variety of thinned Astrocure® 78 with various multifunctional monomers are avialable.
1. Astrocure® 78-20H: Astrocure 78 in 20% hexane diol diacrylate
2. Astrocure® 78-20T: Astrocure 78 in 20% trimethanol propane diacrylate
3. Astrocure® 78-20 TP: Astrocure 78 in 20% tripropylene glycol diacrylate
4. Astrocure® 78-20D3: Astrocure 78 in 20% dipropylene glycol divinyl ether
Astrocure® 67 Oligomer
Astrocure® 67 is a unique, low profile reactive, cycloaliphatic oligomer, especially tailored for application in ultra-violet/electron beam (UV/EB) radiation cured coating.
The product is a flexible version of Astrocure® 78. It is light in color and has excellent adhesion to a wide variety of substrates.
Suggested formulations supplied upon request.
Astrocure® 88 Oligomer
Astrocure® 88 is a low viscosity, low reactivity, flexibilizing oligomer that is designed to be used as a flexibilizing agent.
It is light in color and should be used with Astrocure® 78 in the 10-15% by weight levels.
This resin is air inhibited.
Applications
I. Wood Applications
· Sealers
· Top coatsII. Graphic Arts
· Paper
· Magazines
· InksIII. Electronics
Advantages
I. Physical property/ultra-violet radiation color resistance/cost
The Astrocure oligomer thinned with acrylated monomers can produce coatings that have excellent hardness, have resistance to yellowing with time, and at reduced resin costs.
With aromatic formulated epoxy and urethane acrylates, hardness and reduced cost can be achieved. However, the aromatic nature causes yellowing of the coating with time. Aliphatic type acrylates weather well, but are expensive and toxic.
The cycloaliphatic, fused ring nature of these oligomers allow for low resin shrinkage, excellent resistance to yellowing and coatings made with these oligomers have excellent flexual modulus (hardness).
II. Air Drying Properties
Unlike conventional polyesters and acrylates, these cycloaliphatics behave as alkyds. They will cure in air.
III. Surfactant Properties
The cycloaliphatic nature of these oligomers is extremely hydrophobic (oil soluble). The polyester portion of the oligomer is extremely hydrophilic (water soluble). This combination allows resins, made from Zircon oligomers, to have surfactant characteristics. Products based on Zircon oligomers will accept solids and inks without excessive viscosity build-up (excellent pigmentability). Wood penetration, by these types of resins, seal the wood without bleed back.
IV. Low Shrinkage and Adhesion
Due to the bulky cycloaliphatic nature of Zircon resins, the specific gravity is much lower than conventional aliphatic or aromatic resin. The bulky nature prevents polymer packing resulting in lower shrink values. These properties allow coatings made with Zircon resin to have excellent adhesion to a variety of substrates.
V. Chemical and Aqueous Resistance
Due to the extreme hydrophobic nature of cure coatings made with Zircon U.V. cured resins, said coatings have excellent resistance to a wide variety of chemical and aqueous environments.
Pricing available upon request
Zircon Corporation
322 Moore Lane
Collierville, TN 38017
(800) 343-0964
(901) 850-0561
fax (901) 850-0563
info@zirconcorp.com
© 2003 Zircon Corp.
