Coalescing agents

StabiHty (dilution, mechanical, shear, freeze—thaw, heat, bacterial) compatibiHty (plasticizers, thickeners, pigments, extenders, coalescing agents) rheological character... 

The monoisobutyrate ester of TMPD, Texanol, or Filmer IBT, formally an isobutyraldehyde trimer, is prepared in a single step from isobutyraldehyde or, alternatively, by the esterification of TMPD with isobutyric acid. This monoester is most commonly employed as a coalescing agent for latex-based paints and water-based ink formulations. 

Additives Defoamers, thickeners, coalescing agents, flowing agents, driers, biocides, etc. 

Coalescing agents are, in reality, temporary plasticizers, which promote the coalescence by increasing the amount of plastic flow in latex paints. The types of materials used are ether-alcohol (such as butyl glycol), tributyl phosphate, pine oil, or other strong solvents. All of these have a degree of volatility so that within a period of time they are lost from the film so that the latex hardens to its required properties. 

Dalpad [Dow]. TM for a coalescing agent, a stable, low-odor, low-temperature film-forming aid for polyvinyl acetate and acrylic latex paints. 

Use Plasticizer and coalescing agent for acrylic latexes in floorpolishes, solvent for polymers, insecticides, polyhydroxylic alcohols, sugar, iodine, specialty inks, monomer for nylon-4. 

Neopentyl glycol is used in the preparation of polyesters. Because there are no /3-hydrogen atoms, the polymers are more stable. The self-condensation of isobutyraldehyde followed by reduction leads to 2,2,4-trimethyl-1,3-pentanediol, the monoisobutyrate of which is the most common coalescing agent (used at 0.5-2 vol%) in latex paints. Isobutyl acetate is used as a solvent for nitrocellulose coatings. 

A latex paint is an aqueous emulsion. After the paint dries, the surfactant is still present and may interfere with the resistance of the paint to washing to remove fingerprints or other marks. A destructible surfactant would be valuable in this application. It would have to destruct by the action of light or air. Latex paints are not entirely free of solvent. A few percent of a higher-boiling solvent, a coalescing agent, is usually, but not always, necessary to form a pinhole-free film from the particles of polymer after the water evaporates. A typical one (8.45) is derived from isobutyraldehyde. 

Butyl Dioxitol. [Shell] Butoxydiglycol solvent for use in lacquers, inks coupling solvent for cleaning sol ns. and cutting oils coalescing agent in latex paints component of brake fluids in automotive industry. 

Trimediyl-l,3 )entane l mono-isobu rate solvent, coalescing agent, defoamer in coatings, inks, latexes, drilling muds chemicrd intermediate. 

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