Coatings basecoats

Chem. Descrip Acrylic resin in methyl n-amyl ketone Uses Acrylic for plastic coatings/basecoats, vehicle refinish basecoats/ monocoats, metal protective coatings Featiaes Exc. applic. and appearance durable glossy low VOC zero HAPs... 

Uses Resin for plastic coatings/basecoats, vehicle refinish primers eal-ers, metal protective coatings... 

Disperse-Ayd W-22 wetting agent, pigments wood coating basecoats... 

Lacquer coating (decorative coating) The topcoat that is used to give abrasion and corrosion resistance, color, and texture to a decorative coating system. The lacquer is typically applied over a reflective aluminum film deposited by vacuum evaporation and may be deposited on a flow-coated basecoat, which creates a smooth surface. See also Basecoat Topcoat. 

Ideal properties as primers and basecoats for other adhesives and coatings... 

The total automotive coating composite, however, consists of more than just the basecoat/clear-coat. The metal sheet stock that is formed into the automotive car body is treated with a corrosion-resistant primer applied by cathodic electrophoresis. This coating, often referred to as ECOAT or uni-prime is a hydroxy functional epoxy/ blocked isocyanate dispersion that deposits onto the cathode of an electrolytic cell at a voltage of between 250 and 425 V. Film thickness, which is dependent upon the residence time, temperature, and coating voltage of the electro-coat bath (electrolytic cell), varies between 0.8 and 1.2 mils (1 mil = 25 xm). The curing temperature required to deblock the isocyanate and yield a cross-... 

The solvent-borne basecoat, consisting of polyester or acrylic binder to be cross-lined with melamine or isocyanate, is applied at a dry film thickness of between 0.6 and 1.5 mils, depending upon the color. Poorer-hiding colors, such as red and white straight shades, require the higher film builds, whereas metal lies and darker colors are applied at the lower film builds. The solvent-borne basecoat is allowed to flash-ofif solvent for approximately 3-5 min at ambient conditions prior to application or the solvent-borne clear-coat. This process is referred to as a wet-on-wet application because the basecoat is not in its cured or cross-linked state. 

The waterborne basecoat consists of a urethane or an acrylic dispersion with passivated aluminum for metallic glamour. The aluminum must be passivated to prevent reaction with water and the evolution of hydrogen gas. Passivating agents can include polymers, hexavalent chromium (now mandated for removal), or phosphate esters. The basecoat is pre-baked (with infrared or thermal ovens) to release the majority of the water prior to clear-coat application. 

The solvent-borne clear-coat is spray-applied over the basecoat at a dry film thickness of 1.8-2.0 mils. The clear-coat, responsible for UV protection, chemical resistance, chip resistance, and so on, is most often composed... 

Automotive Finishes. Important industrial automotive topcoats are produced from alkyd resins. Two-coat metallic finishes consist of an acrylic clearcoat and a metallic basecoat. Solventborne basecoats are generally composed of cellulose acetobutyrate and a low molecular mass, branched polyester resin which exhibits high reactivity with precondensed melamine cross-linking resins. 

Amino resins are also employed in waterborne systems used in industrial coatings (e.g., automotive spray primers and basecoats, can and coil coatings). Stable coatings can be formulated with hexakis(methoxymethyl)melamine or partially methylated melamine resins. 

Car paints are cured with heat in special oven lines. Electrodeposition coatings (used as anticorrosive primers) contain only small amounts of volatile organic compounds (VOC), whereas intermediate and topcoats release considerable amounts of VOCs. Intermediate coats based on waterborne resins have been developed to decrease VOC emission and are already being used in some automotive plants. Basecoats, as part of base-clear topcoat systems, contain very high amounts of volatile organic solvents. Waterborne basecoats were developed more recently to lower this source of solvent emission. Some car manufacturers are operating pilot lines with the aim of introducing waterborne basecoats into their production processes. Many car producers in the United States and Europe have already switched their topcoat lines over to waterborne basecoats [11.3]. 

The basecoat-clearcoat system is presently the most commonly used type of topcoat for cars because it is the standard application system for metallic colors. Today, about 70 % of all cars have metallic topcoats. The basecoat-clearcoat system consists of a colored layer (basecoat) which is overcoated after a short flash-oflf time with a protective layer of clearcoat. Both coats are cured together at 120-140 "C. The basecoat contains pigments which provide two types of finish solid (straight) colors or metallic. 

This relates, for example, to coatings, in which stabilizer molecules may migrate from the clearcoat to the basecoat or plastic substrate. These problems may be alleviated by the use of physically persistent stabilizers. High molar mass stabilizers (M >500gmor ), including oligomers with appropriate molecular structures (M=3500-5000 g mol ), are sufficiently physically persistent and do not evaporate at the elevated temperatures of curing [87]. 

Uses Defoamer for water-reducible emulsion and latex systems, high gloss architectural paints, wood preservative stains, aq. flexographic inks, primers, acid catalyzed systems, automotive basecoats, coating colors (folding boxboard), wastewater treatment Properties Lt. yel. si. vise, translucent liq. sol. in butanol, glycol ethers, ethoxypropanol, hexanol, isobutanol, IPA, methoxypropanol, MEK, min. spirits, xylene partly sol. in acetone, ethanol dens. 1.01 g/ml (20 C) flash pt. > 200 C pH = 7.0 (2% in Dl water) nonionic 100% act. 

Uses Used in automotive basecoats food pkg. adhesives, coatings, paper/paperboard, cellophane, film... 

Uses Abrasion resist, aid, toughener, flexibilizer, hardener, gloss aid in water-based coatings (automotive OEM, refinish, primers, basecoats, topcoats), adhesives for wood/plastic/metal substrates, inks binder in waterborne inks, bonding and laminating applies. 

Uses Abrasion resist, aid, toughener, flexibilizer, hardener, gloss aid in water-based coatings (automotive OEM, refinish, primers, basecoats, topcoats), adhesives for wood/plastic/metal substrates, inks Features Low vise. exc. adhesion to substrates crosslinkable thru carboxyl groups provides improved soK/ychem. resist, when crosslinked Properties Vise. 50-100 cps pH 9.5 VOC 0.3 Ib/gal film props, after 30 min 120 C hardness ( ard) 55 tens. str. 5500 psi elong. 260% 100% mod. 3400 psi 35 A solids... 

Chem. Descrip. Kaolin clay CAS 1332-58-7 EINECS/ELINCS 296473-8 Uses Filler for paper coatings, high solids formulations for publication grade papers and medium finish enamels, low cost basecoats, and pigmented size press applies. 

Uses Surf. modiTrer, stabilizer for silica matting agents, mar resist, aid in nonaq. coatings, wood coatings, industrial and automotive basecoats based on NC, alkyds, two-part PU, cellulose acetate butyrate combinations... 

Uses Associative thickener for high-quality latex paints, automotive basecoats, flat/matte, gloss/semigloss, and water-reducible coatings, cementitious prods., graffiti cleaners. Inks, mastics Features VOC-free Properties Powd. 100% act. 

Uses Associative thickener for premium quality semigloss and gloss paints, esp. tint base paints, can coatings, automotive basecoats, marine topcoats, anticorrosive primers, household cleaners, inks, metalworking compds., paint strippers, tile adhesives Features VOC-free reduces or eliminates color float exc. alkyd-like flow, color acceptance and stability... 

Chem. Descrip. Chain stopped aikyd resin in xylene Uses Aikyd for maintenance enamels, implement finishes, auto-refinish basecoats, general purpose air dry or force dry coatings, metal protective topcoats... 

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