Over curing the uv coating film will contribute to film hardness which can lower cofaos. A uv cure system is more costeffective than the gas ovens needed for thermal curing. This article is an open access publication abstract a series of renewable unsaturated polyesters were synthesized from itaconic acid ia, succinic acid, and 1,4butanediol by solventfree polycondensation. It also provides superior bonding strength for other uv coatings such as our uv cure insulator sealer, uv cure premium clear satin finish topcoat and uv cure. Introduction to the basics of uveb chemistry and formulations. Pdf uv curable urethane acrylate coatings formulation. The graphics industry was one of the first to adopt this technology, with a high gloss coating. Uv curing has now been established as an alternative curing mechanism to thermal hardening,contrary to the past, where it was only considered for the curing on temperature sensitive substrates, like wood, paper and plastics uv curable coating used for. Uvcurable hydrophobic coatings of functionalized carbon. Humiseal uv40250 uv curable conformal coating technical data sheet humiseal uv40250 is a single component, high solids, uv curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, surface hardness, flexibility and moisture resistance. Humiseal uv40 uv curable conformal coating technical data sheet humiseal uv40 is a single component, high solids, uv curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, surface hardness, flexibility and moisture resistance. Additional advantage of uv curing is the fast cure speed. Uv cure coatings are available in a variety of colors and can be custom formulated to provide specific performance and application needs.
The uv curable solution acrylic psa with optical clarity is a onepart adhesive. Specifically developed for uv curable field applied wood and vct floor coatings good foam control excellent wetting of matting agents, pigments, and substrates floor coatings with uniform matting physically drying before uv cure translucent to white liquid 11 34 7. Thus the new generation of epoxies can be incorporated into existing uv bonding processes. Improving the adhesion of uvcurable coatings to plastics by andrew stecher and paul mills, plasmatreat us 6.
Uv curable coating technology provides benefits in terms of good performance, environmental compatibility and processing efficiency. It will provide insight in making an effective transition to uv curable coatings and identify the opportunities that can be gained once the transition is complete. Humiseal uv40hv uv curable conformal coating technical. Fcmss were successfully added into uvcurable polyurethane acrylate prepolymer to achieve a hydrophobic coating layer with good. Our uv coatings are clean and green with no solvents, no vocs, no haps, no chrome, no isocyanates, and no toxics release inventory components our uv light curable coatings provide advantages of efficiency and economy, with cure in seconds and improved. Reported herein is the development of a npglide coating that can be photocured at room temperature. Multifunctional uv curable oligomers for hard optical coating. Preparation of a fast waterbased uv cured polyurethane. Van iseghem this article is intended to provide information on uv curable finishing systems from a nonchemist perspective.
Uvcurable aerospace and aircraft coatings life and short cure time that will substantially reduce the time between coating application and the time an. Jan 31, 2002 nevertheless, the types of photoinitiators, vehicles, pigments and extenders do affect the curing properties to a large extent. Equipment manufacturers are now offering a new generation of uv ledequipment with higher output intensities, significantly reducing curing time for adhesives and coatings. Dymax corporation each potential adhesive coating application and customer will have a unique set of requirements, and for each application there are chemistries that fit well and those that dont fit as well. Uv coating adhesion failures over the past three decades, uv curable coatings have attained broad acceptance as an industrial finishing technique for a vari ety of substrates, including many popular plastics. Aug 12, 2016 an introduction to the chemistry of uv curable coatings uv curable coatings are growing in popularity because they cure fast and are environmentally friendly. Revo coatings are a very low odor, highquality uv curable coating. The design of suitable coating systems for uv lacquering the development of coating recipes is based on a design which fits to the production process and in detail which fits to the coating system, coating thickness, coating accuracy and operation speed. As development of uv curable coatings for pvd has progressed, so has the understanding of the pvd process and its unique capabilities and applications. Comprehensive guide to dymax light curing technology lit008.
Two uvcurable coatings were prepared by blending the urethane acrylate oligomer, a reactive monomer 1,6 hexanediol diacrylate hdda or trimethylol. Biobased uvcurable coatings based on itaconic acid sara bra. Of the various formulations that have been tested, robust coatings. Uv curable coatings schmidrhyner coatings quality aqueous coatings, manufactured by schmid rhyner in switzerland, for commercial lithographic, flexographic, rotogravure, and digital coating. Uv cure coatings northern coatings industrial coatings. Seven reasons why surface finishers switch to uvcurable coatings and the benefits they experience. Whitc some may be simple formulations and 0th ers more complex, ltv masking resins are typically comprised of five basic elements. Metal is an ideal candidate for uv curable powder coatings. Presspatterned uv curable high refractive index coatings robert morford, wusheng shih, joelle dachsteiner brewer science, inc. Overview of uv curing ultraviolet curing is a photochemical process in which highintensity ultraviolet light is used to instantly cure or dry inks, coatings or adhesives. Watson coatings uv cure coatings are guaranteed to meet or exceed the performance of expensive powdercoat systems. Figure 1 influence of the application weight and particle. Nevertheless, the types of photoinitiators, vehicles, pigments and extenders do affect the curing properties to a large extent. Curtain coating and roll coating are two such techniques.
Curing behavior of a uvcurable coating based on urethane. It will provide insight in making an effective transition to uv curable coatings and identify the opportunities. Can be used over thermal papers without premature activation of the thermal. The coating material comprises a novel blend of photoinitiators, uv curable resin blends, blends of specific acrylate and methacrylated monomers, a wetting agent, uv absorbers and stabilizers, a rheology modifier, adhesive agents, airrelease. Uv cure coatings can be made non flammable and low voc or voc free to meet your environmental and safety needs. Modjewski some application techniques allow for large amounts of material to be applied in one operation. Matting solventfree uvcurable coatings coatings evonik. Humiseal uv40 uv curable conformal coating technical data sheet. The main reason for such a rapid technological growth of uv curing is its unique process characteristic, which allow uv coating to be applied. Curing behavior of a uv curable coating based on urethane acrylate oligomer. Uv curable antismudge coatings acs applied materials. While i will try to use the term energy curable, please note that the terms radiation curable or uveb curable may be used interchangeably. Uv curable solution acrylic psa with optical clarity. Current antismudge coatings that bear nanopools of a grafted liquid ingredient for dewetting enablement npglide are cured at high temperatures, which are undesirable for application on heatsensitive substrates.
An introduction to the chemistry of uv curable coatings. The target is to develop a recipe, which fulfills all economical and functional. Material safety data sheets msds are available for our uv products uv gel filler msds pdf max resistant topcoat ao msds pdf ultra resistant topcoat msds pdf waterborne uv cure sealer topcoat msds pdf uv cure adhesion promoter sealer msds pdf uv cure premium clear wetlook finish topcoat msds pdf. Songwon has designed a range to help customers achieve numerous different formulations, for applications ranging from nonpigmented clear coats to highly. Uv curable coating systems cure in less than a second uv curable coatings are well known within the industry. Energycured materials do not need to dry and, therefore, do not need the sophisticated and lengthy ovens that would be. Humiseal uv40 uv curable conformal coating technical data. Pdf curing behavior of a uvcurable coating based on. Realizing the benefits of a uv curable coating system in a continual extrusion process means at least an enormous increase in speed of cure, waste reduction.
Technical paper uvcurable, seed oilbased coatings by cationic photopolymerization. We are the worlds leading producer of energy curable resins for industrial and plastic coatings as well as packaging coatings and inks applications, in addition to structural adhesives market, driving market growth and enduser acceptance of this unique. Electronics assembly uv light curable adhesives, coatings, masking resins, and encapsulants for electronic assembly. Measurement of curing reaction heat of uv curing adhesives author. Pdf the market for ultraviolet curing technology has been growing at. Figure 5 compares gel fraction results at three different coating weights and three different levels of uv exposure. Keyland polymers goal is to be the global leader in uvcured powder coating chemistry. Headquartered in cleveland, ohio, keyland polymers sole focus is the development formulation and manufacturing of uvcurable powder coatings. Call us today to see if uv cure coating is the right choice for you. Our uv cure topcoats have excellent water and chemical resistance and have excellent adhesion to films. Uv and led curable nail coatings nail gel coatings have revolutionized the salon experience in the past decade, providing important benefits like extended wear, high gloss, excellent adhesion, and toughness. Uv led curing technology is utilized in the wood coatings industry for applications such as edge coating, roller coating and digital printing. It is fast becoming one of the most popular techniques in the paint and coatings. Another advantage is, that the viscosity of the uv curable ink can be adjusted in a wide range end enables the combination of precise inkjetting with subsequent uv curing.
Uv curable inks and coatings reduce setup and cleanup time because they do not dry in the equipment. Press patterned uvcurable high refractive index coatings robert morford, wusheng shih, joelle dachsteiner brewer science, inc. Uv curing has now been established as an alternative curing mechanism to thermal hardening,contrary to the past, where it was only considered for the curing on temperature sensitive substrates, like wood, paper and plastics. Uv curable coatings schmidrhyner coatings quality aqueous coatings, manufactured by schmid rhyner in switzerland, for commercial lithographic, flexographic, rotogravure, and digital coating applications. Liquid forms of uv curing systems are solventfree, require low energy for curing, and are adaptable to most conventional coating methods. By carefully selecting the acrylates to be used in these applications, superior mechanical properties are achieved, and process improvements can be realized by lowering the viscosity, increasing the reactivity and avoiding vocs. Pdf the market for ultraviolet curing technology has been growing at doubledigit rates in the last 10 years. Employing either radical or cationic curing mechanisms, the crosslinking of these coatings is initiated by means of uv light. Photoinitiators for high performance uv curing applications. The uv light curing process begins when the photoinitiator in the. Over curing of uv coating film over curing the uv coating film has been found to promote coating film brittleness, flaking, poor adhesion, cracking along scores and folds, and an overall loss of film flexibility.
Now, akzonobel is launching a completely reformulated version of its uv curable clearcoat in a twocomponent system that mixes onetoone by weight, and delivers an outstanding performance profile with application, appearance, and protection characteristics indistinguishable from a traditional twocomponent clearcoat. These are uv curable and thus eliminate vacuum or thermal post treatment processes. Pdf uv curing technology has found in the furniture and flooring industries one of its main application. Uv cure coatings are unique because they use light rather than heat energy to cure and depending on the formulation can dry in less than a second upon exposure to uv light. The finished product will have low to no odor to it. This paper will address the current chrome plating process, advantages of pvd as chrome alternative. By carefully selecting the acrylates, superior properties are achieved and process improvements can be realized by lowering the viscosity, increasing the reactivity and avoiding vocs. Presspatterned uvcurable high refractive index coatings. Part 2 a number of seed oilbased, uvcurable coatings have been synthesized. Curing behavior of a uvcurable coating based on urethane acrylate oligomer. Uv led technology drastically reduces energy consumption and significantly reduces workpiece surface temperature.
Conven tional, laborintensive masking can be replaced with semiautomated or automated systems that provide con trolled spraying, dipping. Wood finishing with uv curable coatings by lawrence c. We have created uv powder formulations for both ferrous and nonferrous metals like. The ormocer coatings can be applied by conventional methods such.
However, the cosmetic industry continues to look for raw materials to help overcome. The graphics industry was one of the first to adopt this technology, with a high gloss coating on cards. Technical paper uvcurable, seed oilbased coatings by. Us200202871a1 transparent uv curable coating system. Uv curable blue dtm coating pdf download pdf need answers to your blue diamond questions. Uv curable concrete coatings introduction uv curing basics. It have been around as a coating for paper in magazines and brochures and as a clear coating on printed circuit boards for years. While initially broadspectrum uv lights were used to cure the nail gels, the industry has rapidly shifted over to led systems as the. For wood coatings, there is a strong interest in waterbased uv curable coatings. Uv curable masking resins arc easily dispensed, both in manual and in fully automated processing lines. Multifunctional uv curable oligomers for hard optical coating jacobs du, agnes lechwar, aneta bogdanova, rick longo pci labs abstract hard, optical clear, protective uv curable top coats are necessary for a variety of demanding applications in the automotive, aviation, electronics and scientific instrumentation markets. Currently, the resin system developed by fostermiller fmi is undergoing qualification trials for an aerospace application. With its new uvcurable clearcoat, which is being introduced into selected european markets in both the sikkens and lesonal lines, along with its triedandtrue uv curable primer long available from sikkens and now available from lesonal as well, akzonobel is once again setting itself apart from the competition with innovative products and.
Also, there is limited flaking and waste with revo coatings. Comprehensive guide to dymax uv light curing technology 1. Today, nearly all automotive headlight lenses, most commercial eyewear and a large percentage of consumer electronic devices are uv coated. Humiseal uv40250 uv curable conformal coating technical data. If you have questions about our exclusive blue diamond coating or any of our a106 products, simply complete this form, and well get back to you quickly with answers. A uv visible light reactive coating material to provide a permanent, hard, durable protective coating to stone, ceramic, glass, metal and hard plastics. By its drying mechanism, the uv curable waterbased coating represents a superior adhesive.
The uv curable psa has advantages over a chemically crosslinkable adhesive, e. Terracross uv curable waterbased coatings 3 uv curable waterbased coatings can be used where traditional waterbased or uv coatings come to their limits. Formulation developments in uveb curable inks and coatings. Productivity, productivity, productivity seconds to cure vs. Where traditional drying of solvents or crosslinking of powder coatings can take minutes to hours at high. Measurement of curing reaction heat of uv curing adhesives. Cooper, department of chemical engineering, university of delaware, newark, delaware 1971 6, and arc0 chemical inc.
Coatings have been uv cured in industrial settings since the 1960s. Optimumcuring of uv coating film optimumcuring the uv coating film ensures that desired characteristics are achieved in respect to. Formulation and curing selection of the proper uv dose is critical to overall adhesive performance. Uv coatings uv coating fluid revo uv curable coatings. When water penetrates the wood, the wood swells at the surface and improves the adhesion of the coating. Humiseal uv40250 uv curable conformal coating technical. The influence of reactive monomers article pdf available in songklanakarin journal of science and technology 332. Our uv cure primers allow a print receptive surface uncured and remains uv curable after the ink is applied which can potentially form covalent bonds between the ink if uv active and the primer after a uv curing cycle. Highperformance uvcurable urethane acrylates via deblocking chemistry sachin velankar, jose pazos, and stuart l.
Uv curing for wood applications uv curing eb curing. Acrylates feature a broad range of chemical structures. In comparison to solvent or aqueous based coatings neat uv. The following section highlights the advantages of dymax lcms versus. One of the most important advantages of uv curable coatings over conventional airdrying or heatcured coatings is the speed. The immediate interaction between the reticulation varnish film and the uncured uv coating film results in the coating film becoming reticulatedtextured on the applied varnish areas. Press patterned uvcurable high refractive index coatings. For example with regard to the application of a uv coating on a waterbased primer. Curing behavior of a uvcurable coating based on urethane acrylate.
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