Paint Industrial

Hydrophobe-modified copolymers of acrylate esters with acryflc or methacryflc acid are finding increasing use as high quality thickeners for both trade sales and industrial paints (186). Formulations thickened with these unique water-soluble polymers show excellent flow and leveling characteristics. 

Llthol Reds. Lithol Red or Pigment Red 49 1/7103-38-4] is one of the most important of the precipitated salt pigments. They comprise a family of sodium (PR 49), barium (PR 49 1), calcium (PR 49 2), and strontium (PR 49 3) salts of dia2oti2ed Tobias acid or 2-naphthylamine-l-sulfonic acid coupled with 2-naphthol. The most popular are the barium and calcium salts, the former being yellower in shade. These reds are used where brightness, bleed resistance, and low cost ate of primary importance. They are neither resistant to heat nor chemicals, and are used primarily in printing inks and some inexpensive air-dried industrial paints where good durabiUty is not requited. 

It is used in high grade industrial paints and, in combination with high performance pigments, in automotive finishes. The transparent type which is tinctoriaHy strong finds appHcations in a variety of printing inks. 

Most apphcations are in high grade industrial paints, especially automotive finishes. Some types (PR 149) are used primarily in plastics and fibers. 

Lack-industrie,/. (paint and) varnish industry, -lack, m. lac lake, -lasurfarbe,/. transparent varnish color, -laus,/. lac insect, -lausfarb-stoff, m. lac dye. -leder, n. japanned leather, patent leather, -leinol, n. linseed oil for varnish. -losungsmittel, n. lacquer solvent. 

Formerly Industrial Paints Research Manager, ICI Paints, Slough... 

Organic and inorganic paint systems are widely used to protect and enhance appearance because they are often economic and always flexible in use. In many industries paint is chosen when other coating processes are technically impossible or uneconomic. Because it is so often used upon subjects which are difficult to coat, sensible design detailing becomes even more important. 

Some water-thinned industrial paints exhibit anomalous viscosity changes during drying and therefore need careful control of air flow and humidity to ensure satisfactory film formation. 

In industrial painting throughput rate is critical and drying equipment will usually be needed. This equipment will control the rate of air movement, to remove solvents and/or volatile reaction products, and is also likely to include devices for raising the temperature of the paint film, or creating free radicals within it. 

The pressures leading to new developments in industrial painting derive from the drive for better quality, the need for economy, and the demand for increased safety in the workplace and in the environment. 

The principal field of application for synthetic polymers as art materials is that of paint binders, which developed in the second half of the twentieth century when manufacturers of artists paints and varnishes realized the potential of synthetic resins used in the decorative household and industrial paint market [81]. The most important families of synthetic artists paints are the acrylics, the vinyl acetate resins, and the alkyds, and Py-GC/MS has been used to identify all these types of modem paints. 

Silicone resins find use as insulating varnishes, impregnating and encapsulating agents and in industrial paints. 

Apart from the O.E.M. sector water reducible systems are gaining growing importance with high quality industrial paints and refinish systems as well. 

The paints market shows only limited interest in P.Y.55, although the pigment is occasionally used to lend color to low quality industrial paints. In 1/3 SD white reductions, the pigment matches the lightfastness of P.Y.13 samples its full shades are more lightfast. Addition of TiOz decreases its resistance to light. 

P.R.23 is recommended for use in industrial paints although this is one of the markets where it competes primarily with P.R.146. Despite being tinctorially stronger and somewhat yellower, P.R.23 is also less fast to overpainting than P.R.146 and considerably less lightfast than the latter. 

P.R.146, which is also used in paints, is primarily applied in emulsion and architectural paints it also lends color to general industrial paints in applications where durability is unimportant. 

As a result of its excellent fastness properties, P.R.170 is used in high grade industrial paints. The pigment lends color to finishes for tools, to implements, agricultural machinery, and commercial vehicles the opaque varieties are also used for automotive finishes, such as automotive refinishes. Thorough testing is necessary before a product can be used in original automotive finishes, for which full shades of P.R.170 are sometimes employed. 

Both the barium lake P.R.49 1 and the calcium lake P.R.49 2 resemble Lake Red C pigments (P.R.53 1) in terms of fastness to organic solvents, to alkali and acid, and to fastness in application. However, P.R.49 grades are much less heat stable, which narrows their applicability in plastics. Areas of application, especially in the USA, include elastomers, to a lesser extent also inexpensive industrial paints, air drying and nitro paints. Their main market, however, is in printing inks. 

Commercially available P.O.46 types are usually quite transparent. They are employed primarily in packaging printing inks, also in offset and metal deco printing. Publication gravure inks, plastics, especially PVC, LDPE, and elastomers, as well as general industrial paints are suitable media for pigment application. P.O.46 is less solvent resistant than P.R.53 1, but it is faster to alkali and acid. In terms of lightfastness, P.O.46 performs poorly 1/3 and 1/25 SD prints equal only step 1 on the Blue Scale. 

Paint manufacturers frequently use P.R.48 1 in inexpensive industrial paints, in which the pigment exhibits good fastness to overpainting. The lightfastness in full shade equals step 5-6 on the Blue Scale, but the pigment loses its fastness to light rapidly as the TiOz content increases. P.R.48 1 is not recommended for exterior application. 

Poor hghtfastness considerably restricts the use of P.R.57 1 in coatings and emulsion paints. The pigment is, however, occasionally found in industrial paints. 

P.R.58 4 is primarily used in general industrial paints, where its full shade and related shades are of interest. This is also true for other manganese pigment lakes. In full shade, P.R.58 4 affords deep carmine shades, but white reductions provide only very dull, bluish shades of red. The pigment is fast to organic solvents and... 

The paint industry uses P.R.175 primarily to color industrial paints and also automobile repair finishes. High transparency makes the pigment an important product for transparent and metallic effect finishes. The pigment is suited to twocoat metallic automobile (O.E.M.) finishes, also referred to as base coat/clear coat finishes, especially if the clear coat contains UV absorbants. Its lightfastness and weatherfastness are excellent. P.R.175 does not bloom, is completely fast to overpainting, and is heat stable up to 200°C. 

The paint industry is interested in individual representatives of this class, such as P.Y.128. These are used to color high grade paints, such as automobile (O.E.M) finishes and automotive refinishes. Other types are used in general industrial paints. As a rule, the fastness of disazo condensation pigments to overcoating is good to excellent in some media. The pigments are also used in architectural paints, sometimes also in emulsion paints. 

P.R.242 is an equally valuable product for paints, especially for various types of industrial paints. It is also recommended for use in automotive finishes. Both lightfastness and weatherfastness are excellent, but do not quite reach the levels of the appreciably yellower anthanthrone P.R.168. P.R.242 is fast to overcoating and heat stable above 180°C. It is also employed in emulsion paints based on synthetic resin. 

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