Solventless inks

The use of solventless inks avoids the emission of solvents during drying. The development of such inks has been a major goal of the printing ink industry for the past several years and has resulted in tiie development of several different types 1. ultraviolet light-cured inks ... 

The main advantage of these inks is that they can be used in the present drying systems without installing new equipment. Moreover, some can be dried at temperatures as low as 220°F instead of the usual 275° F. Their main disadvantage is that the solvent emission, although reduced significantly, is not eliminated. Nevertheless, they can serve as satisfactory interim replacements for the heat-set inks until the next generation of solventless inks is fully developed. 

Uses Mar resist, aid, slip agent, antiblocking agent tor solv. and water-based, high solids and solventless inks, overprint varnishes, paints/coatings... 

Solventless Oil-Based Inks Plus Overcoat. The principle of this approach developed some years ago (M) is to protect the wet ink film on a printed surfece by applying a thin, transparent, film-forming polymer... 

Uses Defoamer in inks and coalings, solventless, solv., waterborne, and energy-curable systems, food-contact inks and coatings defoamer in food-confact paper coatings, paper/paperboard food pkg. adhesives Regulatory FDA21CFR 175.105,175.300,176.170,176.180,176.200, 176.210... 

Chem. Descrip. Trifunctional polyester acrylate oligomer Uses Diluent for UV/EB-cured prods., flexographic and screen inks, coatings (paper, wood, plastics), paper upgrading, high vise, systems, EB-cured paper-foil laminating adhesives, solventless spray and ttow coaler applies. 

Uses Surfactant, w/o and aux. o/w emulsifier for latex and aq. paints, solv. and solventless coatings, min. oil-based defoamers, inks, dry cleaning soaps emollient and lubricant in cosmetic creams and lotions Features Self-dispersing... 

High exposures remained eommon in paint and printing ink industry still in 1970 s for example, most solvent measurements eondueted in these industries in Finland exeeeded the present OELs. Water-based paints are today elearly most eommon in eonstmetion painting. Alkyd-based eonstmetion paints with white spirit (Stoddard solvent, mineral spirit or solvent naphtha) as a solvent are, however, still produeed. Solvent-based paints have remained most eommon in industrial painting, even though the solventless powder paints are also produeed in large quantities. 

In addition to water, oxygenated hydrocarbon solvents are generally preferred whenever the formulation allows them. This is also due to environmental considerations. Types of solvents used include alcohols, esters, ketones, and the alcohol ethers associated with inks. Some paints still use hydrocarbon solvents such as turpentine and kerosene, and there a few instances of chlorinated hydrocarbon solvents, such as trichloroethylene, being used. Finally, there are solventless delivery systems such as electrodeposition used in some applications such as automotive coatings. 

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