Medium oil alkyd

Medium oil alkyds contain, as the name already suggests, 35-55% oil by weight and are used in the higher-quality trade and DIY paints. In quick-drying properties and yellowing they outperform the long oil alkyds and they are mostly dissolved in white spirit. 

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Nitrocellulose based lacquers often contain short or medium oil alkyds to improve flexibiUty and adhesion. The most commonly used are short oil non drying alkyds. Amino resins or urethane resins with residual isocyanate functional groups may be added to cross-link the coating film for improved solvent and chemical resistance. The principal appHcations are furniture coatings, top lacquer for printed paper, and automotive refinishing primers. 

Coating materials may be based on short or medium-oil alkyds (e.g. primers for door and window frames) nitrocellulose or thermoplastic acrylics (e.g. lacquers for paper or furniture finishes) amino resin-alkyd coatings, with or without nitrocellulose inclusions, but with a strong acid catalyst to promote low temperature cure (furniture finishes) two-pack polyurethanes (furniture, flat boards) unsaturated polyester resins in styrene with free-radical cure initiated by peroxides (furniture) or unsaturated acrylic oligomers and monomers cured by u.v. radiation or electron beams (coatings for record sleeves paperback covers, knock-down furniture or flush interior doors). 

Medium lanthanides, 74 631 Medium oil alkyds, 2 148 Medium performance sealants, 22 28 Medium pH, for fermentation, 77 38 Medium-temperature radiation furnaces, 72 292-293... 

P.R.ll has largely been replaced by other products. Its hue is a bluish red which resembles the color of ruby P.R.ll is more bluish than its positional isomer P.R.7. Both pigments behave similarly as far as fastness properties are concerned, which includes fastness to most of the solvents that are used in paints and printing inks, fastness to overlacquering, heat stability, and others. However, P.R.ll is much less lightfast than P.R.7 incorporated in medium-oil alkyd systems at 1/3 SD, P.R.ll scores 2 steps less on the Blue Scale (step 4). 

P.O.19 has stimulated only limited industrial interest and is rarely used in Europe. It provides a shade which in white reductions resembles that of P.O.34, but which is much duller. Its full shade is noticeably yellower than that of P.O.34. P.O.19, incorporated in medium-oil alkyd resin systems, is less lightfast, both in full shade and in white reductions, than opaque P.O.34 types. The commercially available type exhibits poor rheological behavior. 

Nitrocellulose-based lacquers often contain short or medium oil alkyds to improve flexibility and adhesion. The principal applications are furniture coalings, top lacquer for printed paper, and automotive refinishing primers. 

Medium oil linseed and soya alkyds are used in automotive refinishing and implement enamels. In general, all-round durability of medium oil alkyds is better than their longer or shorter relations. 

Medium-oil alkyds are typically used in architectural paints and as co-resin in some original equipment manufacturer (OEM) coatings. These alkyds are 46-55% oil and 30—35% phthalic anhydride. They are viscous, soluble in mineral spirits and aromatic solvents, and slightly harder, and have poorer application properties than long-oil alkyds. 

C. O. Akintayo and K. O. Adebowale, Synthesis, characterization and evaluation of chlorinated Albizia benth medium oil alkyds . Prog Org Coat, 2004, 50, 138-43. 

Paint 35 Medium Oil Alkyd Primer (Air Dry/Low Bake), Type I and Type II... 

A medium oil alkyd (46-55% oil content and 30-35% phthalic anhydride in final resin) is one that has good water impermeability, fair baking and color, usual application, and is soluble in aliphatic solvents such as mineral spirits and naphthas. The modifying oil commonly used here is linseed or soya. 

A typical fusion process formation for a medium oil alkyd resin is as follows [46]. 

Compatibility studies have been carried out with Reichhold Beckosol long oil alkyds 10-560 and 10-060, medium oil alkyd 11-035, and short oil alkyd 12-005. Vernonia oil is compatible with all three types of alkyd resins at any ratio. 

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