Paints coalescing agents

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. 

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. 

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. 

Volatile paint components include organic solvents, water, and coalescing agents. Nonvolatile components include binders, resins, plasticizers, paint additives, dyes, pigments, and extenders. In some types of binder, chemical hardening can lead to condensation products such as water, alcohols, and aldehydes or their acetals, which are released into the atmosphere, thus being regarded as volatile components. 

Polymer Dispersions (Emulsion Polymers). Waterborne paints based on polymer dispersions (usually referred to as emulsion paints) are not water soluble. They are water-thinnable systems composed of dispersions of polymer particles in water (see Section 3.5). The particles consist of high molecular mass polymers (e.g., of styrene, butadiene, acrylate, or vinyl monomers) and are produced by emulsion polymerization. These waterborne paints also contain small amounts of organic solvents (< 5 wt %) that serve as film-forming (coalescing) agents that partially evaporate on drying. 

Chem. Descrip. Blend ot diisobutyl esters of glutaric (55-65%), succinic acids (15-25%), and adipic (12-23%) acids Uses Coalescing agent, solvent in paints/coatings, resin cleaners, water-based coatings, hand cleaners, polishes, floor waxes, ink cleaners, textile chems., solv. degreasers, carpet shampoos Features Alternative for high VOC soivs. 

Uses Latex coalescing agent in aq. architectural and industrial coatings carrier solvent for textile dyes solvent for inks, textile printing pastes paint removers coalescent for latex adhesives solvent, coupling agent in cosmetics, toiletries Features HAPs-free... 

Chem. Descrip. Diisobutyl ester of a mixt. of dicarboxylic acids Uses Coalescing agent, solvent for architectural coatings, interior paints, wood paints and stains Features High boiling Lusolvan PP [BASF AG]... 

Uses Coalescing agent for interior paints, gloss emulsion paints, wood paints and stains Properties Low odor Lustrabrite S [Telechemische]... 

Uses Antishrink agent in cementitious systems coalescing agent in redispersible emulsion paints... 

Uses Solvent for electronics, paints/coatings (solv.-based, high-solids systems, stripping formulations, as coalescing agent), printed circuit boards, metal industry Eeatures Non-ozone depleting... 

Chem. Deserp. Ester Uses Coalescing agent for latex disp. paints Featixes Reduces paint odor and VOC s reduces min. film-formation temp, and facilitates film formation... 

Uses Coalescing agent, plasticizer for latex paints/coatings, high-gloss... 

Uses Coalescing agent for trade sales latex paints... 

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