Automotive primer

Miscellaneous. Talc is used in gypsumboatd joint compounds as a high end filler to promote smoothness, sandabiHty, and sag resistance. It is used in automotive primers and polyester body repair compounds to promote sandabiHty. It is used in a wide variety of caulking compounds to improve theology and sag resistance. 

Our electrochemical work differed drastically from the Groseclose work in that polymer coated metal samples were employed. Furthermore, we found that coatings can have corrosion resistance when their rest potentials are either more noble (B210/NVP) or less noble (B210/GBL) than the uncoated substrate. Leidheiser (22,23) examin zinc phosphate pretreated panels with automotive primer after 10 days exposure to the salt spray. The start and finish rest potentials of the samples with good paint performance were consistently more negative than those samples with poor paint performance ... 

Automotive primers and primer surfaces Coatings for domestic electrical appliances... 

Inhibitive Primers. The traditional primers are red lead and linseed oil, alkyd resins and zinc potassium chromate, proprietary epoxy, alkyd, urethane and latex systems with modified phosphate, borate and molybdate pigments. Chromate-based pigments, although in use in aircraft coatings, automotive primers and coil coating primers, are subject to environmental concern on the toxicity of hexavalent chromium which is likely to result in their replacement by innocuous products. 

Georgia. VOC emissions are limited (lb/gal) by industry and coatings used automotive— primers, 1.2 if dipped and 2.8 if sprayed, topcoat, 2.8, and repair, 4.8 metal furniture, 3.0 appliance, 2.8 and miscellaneous metal-performance coatings, 3.5, high-performance coatings, 6.2, clear-coat, 4.3, and all others, 3.0 coil coating, 2.6. 

Polyester resins possess premium performance properties such as exterior durability, gloss, flexibility hardness, color stability, and versatility of cure. Polyesters are used in product finishes for household appliances, food and beverage containers, aircraft and equipment, automotive primers and bake coats, metal furniture, and fixtures. For example, water-soluble saturated polyesters are used in industrial baking paints, and in combination with melamine resin. Polyesters can be formulated in high solids and waterborne formulations to meet the requirements for the low VOC coatings being mandated by the EPA. 

The majority of the currently used coating systems is based on copolymers prepared from epoxy resins, polyfunctional amines, and partially blocked isocyanates (84-87). The resins are generally solubilized by the formation of cationic derivatives of amines by aminolysls of the carbamate in the partially blocked isocyanate. The principal applications of these cationic electrocoating systems are as automotive primers, in appliances, as primers and one-coat system.s, and in various other industrial applications. The main... 

MAJOR APPLICATIONS Protective coatings (for appliance, automotive primers, pipes, etc.). Encapsulation of electrical and electronic devices. Adhesives. Bonding materials for dental uses. Replacement of welding and riveting in aircraft and automobiles. In composites for materials in space industry, printed circuitry, pressure vessels and pipes. Construction uses such as flooring, paving, and airport runway repair. 

Chem. Descrip. Polyester PU disp. (41%) in water/N-methyl pyrrolidone, neutralized with dimethyl ethanolamine Uses Urethane for sfoving industrial coatings, stoving automotive primer surfacers and two-pack PU primers and top coats for plastics Properties = 50 nm mean particle size sol. in water partly sol. in glycol ethers, alcohols dens. = 1.1 g/ml (20 C) vise. 1000 0500 mPa-s-(23... 

Uses Leveling agenf, gloss aid, anficrafering agenf for aq. sysfems, aq. air-dried and baked indusfrial coatings, automotive fopcoafs, automotive primer surfacers, inks... 

Chem. Descrip. Epoxy ester in MPK and xylene Uses Epoxy tor maintenance primers and topcoats, appliance and floor finishes, automotive primers, and aerosol paints Properties Gardner 11 color sp.gr. 1.00 dens. 8.3 Ib/gal vise. 4700 cps acid no. 9 80% solids Epotuf 95-406 [Reichhold]... 

Uses Hardener, flexibilizer, gloss aid, flow aid in metal deco, automotive primers and topcoats, and general industrial coatings, high-solids coatings... 

Uses Flexibilizer in metal decorative, automotive primers and topcoats, oveq)rint varnishes, aerospace coatings, and prepolymer synthesis Features Highest reactivity exc. adhesion to substrates fast cure Prr rerties Gardner < 1 color It. straw liq. sol. in alcohols, esters, ketones, xylene partly sol. in min. spirits low m.w. sp.gr. 1.12 dens. 9.3 Ib/gal vise. 10,000 cps acid no. 0.1 hyd. no. 230 100% act. polyester polyol 0.02% moisture K-Flex UD-320 [King Ind.]... 

Uses Polyol for thermoset water-reducible coatings, dispersions and emulsions crosslinked with melamines or aminoplast resins, in automotive primers, container coatings, and general industrial uses Properties Vise, liq. sol. In polar org. soivs. and water insol. in aliphatic and aromatic hydrocarbons sp.gr. 1.19 g/cc vise. 11,000 cps hyd. no. 330 flash pt. (CC) > 200 F 100% act. 

Uses Butylated benzoguanamine-fonnaldehyde in combination with all, epoxide, and oil-fiee polyester resins for high performance baking enamels for appliances, can coatings, automotive primers Fealwes Unplasticized low vise. high reactivity, flexibility Properties Gardner < 1 color dens. = 1.01 g/ml (20 C) dynamic vise. 

Uses Crosslinking agent for coating systems incl. automotive primers/... 

Chem. Descrip. Antimony-doped tin oxide coated onto inert core (mica) Uses Electroconductive additive in coatings and plastics for ESD protection in electronic component pkg., floor/wall coatings, plastics, laminates electrostatic painting (automotive primers) dielec, film and paper toners... 

---