Oleoresinous Paints

Acid vapours emitted by wood, oleoresinous paints and some plastics (cf. Section 18.8-10) attack both zinc and cadmium. The relative behaviour varies, and appears to depend on the nature and concentration of the acid vapours and on the relative humidity. For these conditions of exposure, therefore, no advice can be given as to which metal should be used. It should not be assumed, therefore, that because one metal has failed therefore the other would be better. 

The conventional bituminous or oleoresinous paints previously described are still used on the bottoms of smaller ships, the chief difference being that they are applied mainly by airless spraying. The formulations may be adjusted to permit application of thicker coats than by brush or roller, although the coats must not be too thick because oleoresinous paints require... 

Chem. Descrip. Butyraldoxime CAS 110-69-0 EINECS/ELINCS 203-792-8 Uses Antiskinning agent in oil and oleoresinous paints Features No side effects on film props. 

Uses Colorant for in-plant tinting of architectural alkyd and oleoresinous paints, N/C lacquers, air-dry, and selected baking Industrial coatings GPRI 4000 [Georgia-Pacific Resins]... 

Oils are more frequently used in oleoresinous paints and varnishes. In these, the oil is either mixed with, or heat-bodied in the presence of, some other resin. The resin may react with the oil to give larger molecules containing fatty acid. Reaction occurs with rosin and its derivatives, phenolic resins and petroleum resins. Other resins, such as terpene resins and coumarone-indene resins, do not react with the oil, but heat helps to dissolve the resin and causes the oil to body. The oils used are those found suitable for oil paints. 

Calcium linoleate n. White amorphous powder soluble in alcohol and ether insoluble in water. Used for waterproofing compounds, emulsifying agents, and as a stabilizer for oleoresinous paints. 

Asphalt, shellac, and other naturally occurring resins have been used as protective and decorative coatings for centuries and were the major products of the polymer industry in the 1880s. Ready-mixed oleoresinous paints were available prior to the 1880s and accounted for 50% of commercial paints in the 1930s. 

Varnishes. The bitumen replaces some or all parts of a resin in oleoresinous paints (oils combined with resin to obtain paints> such as alkyd, phenolics, etc.). 

The Boston stone, a prime example of this device, was imported from England. In 1727, Thomas Child produced two barrels of oleoresinous paint daily in Boston using ye old paint stone. The Federation of Societies for Coatings Technology has preserved the stone, and it is still visible as a building stone in downtown Boston. 

Presbyter Theophilus (twelfth century), also called Rugerus, in cooperation with another monk, called Roger, wrote De Diversis Artibus, which described painting and other practical arts used in church decoration. Neither of the coauthors showed any scientific talent, but they did record unpublished recipes, which incorporated drying oils as linseed, that had been used for centuries. Detailed recipes for producing oleoresinous paints were recorded by Theophilus. 

It has been recognized for many centuries that film formation from oleoresinous paints depends on atmospheric exposure ofthe unsaturated oils. It is nowknownthatacrosslinkingbetweenthepolymerchains occurs andan insoluble polymer network is produced after oxygen is absorbed in this drying reaction. 

During the following half-century, polymer chemists learned that curing or drying oleoresinous paints in the presence of heavy metal salts ( driers ) and air involved forming hydroperoxides on the carbon atoms adjacent to the ethylenic bonds in the unsaturated oils. In the accepted mechanism, the carbon-carbon double bond shifts to a conjugated configuration, and the peroxide is transferred to another monoallylic carbon atom. Polymerization proceeds via a radical chain mechanism to produce a crosslinked insoluble film. 

Kienle recognized that the condensation of difunctional reactants produced linear polymers and trifunctional reactants produced crosslinked, infusible network polymers. Accordingly, he used a reaction of ethylene glycol and phthalic anhydride in the presence of drying oils to obtain linear polymers that could undergo autoxidation polymerization like that described for oleoresinous paints. Kienle used syllables from the reactants alcohol and acid to coin the word alkyd. 

In 1931, Kienle used Glyptal and oleoresinous paint technology to produce superior polymers that now account for about one-half of all coating resins. He obtained air-curable resins that were more flexible than Glyptals by producing oil-modified polyester resins for which he coined the acronym, alkyd, from the alcohol and acid reactants used. 

Two barrels of oleoresinous paint produced daily in Boston, Massachusetts, by... 

Glyptal and oleoresinous paint technology (oil-modified polyester resins) used by... 

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