Paint primers

They may not provide superior hiding or coverage because these properties are not as important for primers as they are for topcoat paints. Primers may also contain specialty pigments and additives to help resist corrosion or prevent stain bleed-through. 

For protective coatings, such as with epoxy paints, the minimum thickness of paint (primer plus paint) should be around 70-80 microns, which is also possible thiough one coat each of primer and paint. If different paint shades are required on outer and inner surfaces paint any one side first, cure it almost completely and then apply the second shade on the other side. Even when there is a wrapping on the second side, can be easily wiped and cleaned, without affecting the first. 

Application of protective paints consists of surface preparation of steel, priming coat and finishing coats. Wherever possible, steel should be blast-cleaned before painting. Primers thoroughly wet the metal to promote adhesion of finishing paints and carry inhibitive pigments. For example, red lead oxide will minimize the spread of rust on metal surfaces. The total thickness of fmishing coats must be at least 0.125 mm for adequate protection and life. Four coats of paint usually are necessary to achieve this. 

Structural steels are frequently protected from corrosion by means of a paint primer, but these materials can have an adverse effect on the... 

Those with No require special paint, primer, or prepainting surface preparation. Code E = Excellent VG = Very Good G = Good F = Fair P = Poor. 

For previously painted and fireproofed surfaces, the mastic manufacturer should be consulted to assure compatibility with the existing surface, proposed paint primer, and mastic. New galvanized surfaces should be mechanically abraded to ensure adherence of the prime coating. 

Vegetable oil c Hydrocarbons, toluene, xylene Clear varnish, industrial enamels, printing inks, paint primer... 

Coating compounds are used to cover the surfaces of many materials from plastic to paper to fabric to metal to concrete and so on. Many plastics produced are consumed as coating materials, including paints, primers, varnishes, and enamels. Metals may be surface coated to improve their workability in mechanical processing. Substrates protected from different environmental conditions basically include the metals (steel, zinc, aluminum, and copper), inorganic materials (plaster, concrete, and asbestos) and organic materials (wood, wallboard, wallpaper, and plastics). Different technical developments continue to occur in the... 

Table 28.4 Surface Treatment Effect of TMS by Succeeding Plasmas on Adhesion of Spray Paint Primer [Spraylat EWDY048 (primer D)] to TMS Plasma-Coated [7A](Ace/0) Aluminum Panels ...

From the XPS analysis results, it was found that TMS plasma coatings prepared in a closed system have a carbon-rich surface, which is similar to TMS polymers followed by methane plasma deposition, i.e., T/C as described in a flow system. The adhesion study also showed that the T/C plasma treatment on aluminum alloy provided excellent adhesion to spray paint primers. The primer adhesion performance of closed system TMS plasma polymers was also examined. Since the porous surface... 

Architectural coatings include interior and exterior house paints, primers, sealers, varnishes, and stains. Industrial coatings include automotive paints, can coatings, furniture finishing, and road-marking paints. 

Low-melting-point metals are of particular concern. Molten copper, zinc, or aluminum will attack the grain boundaries of austenitic alloys preferentially. Copper alloy clamps or fixtures used to hold work, whereas welding has been known to leave smears of metal that have subsequently caused cracking. Zinc from galvanized steel or paint primers has also been known to contaminate weld joints. 

Talc is a primary ingredient in talcum powder, and is used in some antiperspirants and deodorants, and in cosmetics. It also can be used as a pigment in paints, primers, and enamels as well as a filler for paper, rubber, soap, and in household putty. 

Most paints used in the household today are water-based products. Significant quantities of paints, primers, and brush cleaners are washed down the drain during cleanup following painting. Water-based paints contain numerous toxic chemicals. These include pigments (many with heavy metals), biocides, glycol ethers, binders, amines, acrylate, and other polymer monomers, surfactants, aliphatic and aromatic hydrocarbons alcohols, ketones, and esters. I36,37 ... 

Camel-TEX . [Genstar Stone Prods.] Calcium carbonate filler for paints, primers, sealers, polyester-fiberglass premixes, jxeforms, and hand lay-up gel coats, rubber automodve prods., household prods., tubing, medical prods., closures, putty, caulk, adhesives. 

Dolchem. [Dolphin Pdnt Chem.] Adhesives, coatings, dispersions, organosols, paints, primers, putty. 

Primers with particularly good adhesion to RP surfaces are offered by several paint manufiicturers and, for a durable surface, it is advisable to use them. They can be applied without previous abrading, if the surface is clean and dry. When normal paint primers are used, it is advisable, however, to rub down the surface with a fine abrasive, to obtain good keying. 

CAS 772743-7 EINECS/ELINCS 231-7844 Uses Extender, pigment for gloss enamels, powd. coatings, semigloss latexes, house paints, primers filler in many plastics applies., in rubber goods, and in ceramics Regulatory DOT nonregulated... 

Chem. Descrip. Dicylopentadiene/linseed oil copolymer in min. spirits Uses Drying oil for house paint primers, enamels, uminum paints Features Fast dry good water resist, and hardness Properties Gardner 10 max. color dens. 7.65 Ib/gal vise. (G-H) R-U add no. 4 max. 70% NV CPS072 [Degussa/Silanes]... 

CAS 14807-96-6 EINECS/ELINCS 23 fl77-9 Uses Filler, extender in NR, SR, paints, sealants, mastics, latex compds. pigment for paints/coatings Ind. interior wall paints, exterior house paints, primers, maintenance paints, traffic paints increases paint consistency. Improves pigment suspension where settling is a problem Features Provides high brightness, chem. inertness, easy disp., exc. 

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