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Urethane coating types coatings

Water-Vapor Permeability. Water-vapor permeabiUty depends on the polymer used for the coating layer and its stmcture. Vinyl-coated fabrics have Httie water-vapor permeabiUty due to the coating layer. Although polyurethane polymer is water-vapor permeable, urethane-coated fabrics also have low permeabiUty values due to their soHd layer stmcture. On the other hand, man-made leathers have good permeabiUty values as high as that of leather due to their porous layer stmcture. The permeabiUty of grain-type is lower than that of suede-type, influenced by finishing method. [Pg.92]

By varying molecular weight and functionaUty of the castor polyols and the type of isocyanate, a variety of clear and pigmented urethane coatings can be prepared. Copolymers of vinyl and castor-based urethane have also been reported for use as exterior coatings for plywood and flexible substrates (90) and for appHcation over steel, concrete, and wood substrates (91). [Pg.156]

The acetates of most alcohols are also commercially available and have diverse uses. Because of their high solvent power, ethyl, isopropyl, butyl, isobutyl, amyl, and isoamyl acetates are used in ceUulose nitrate and other lacquer-type coatings (see Cellulose, esters). Butyl and hexyl acetates are exceUent solvents for polyurethane coating systems (see Coatings Urethane polymers). Ethyl, isobutyl, amyl, and isoamyl acetates are frequentiy used as components in flavoring (see Flavors and spices), and isopropyl, benzyl, octyl, geranyl, linalyl, and methyl acetates are important additives in perfumes (qv). [Pg.374]

Unsaturated polyester resins (UPRs) Uralkyd resins, 202 Urea-methylol reaction, 410 Urethane alkyds, 241 Urethane coatings, 202 Urethane elastomers, implanted, 207 Urethane foams, tests for, 244 Urethane gels, 205 Urethane-grade ATPEs, 223 Urethane-grade polyol types, 212 Urethane-grade raw materials, 246 Urethane hydrogel, preparation of, 250-251... [Pg.604]

We believe it is a good time to initiate a comprehensive classification system. The system would be oriented to the commercial user and not intended to be limited by chemical considerations, because in the practical world frequently more than one composition will perform an equivalent job. We also believe that such a system would encourage a healthier industrial growth situation. The present ASTM urethane coatings classification (l) covers chiefly the solvent types and is thus an extremely limited one from the viewpoint of the new developments in the past ten years. [Pg.506]

Other Urethane Coating Components Types of Urethane Coatings... [Pg.985]

One-Package Urethane Alkyd (Oil-Modified Urethanes) Coatings (ASTM Type 1)... [Pg.985]

One-Package Moisture-Cure Urethane Coatings (ASTM Type 2) Single-Package Blocked Adduct Urethane Coatings (ASTM Type 3)... [Pg.985]

Two-Package Catalyst Urethane Coatings (ASTM Type 4) Two-Package Polyol Urethane Coatings (ASTM Type 5)... [Pg.985]

Other types of isocyanate derivatives that find increasing application in the urethane coating industry are isocyanate-containing isocyanurates, which include also aliphatic, cycloaliphatic, and aromatic derivatives. [Pg.986]

An important application of urethane coatings is in the fabric coatings field. The terra "wet look" was very fashionable for some time and was applied to highly glossy urethane coatings and was later succeeded by the "suede look." These types of coatings were applied to apparel but were also employed in furniture fabrics. [Pg.987]

Polyesters derived from e-caprolactone and ethylene glycol and triols, such as trimethylolpropane, have been employed for the preparation of different types of urethane coatings, including nonyellowing systems (88. 89). These types of polyesters exhibit improved hydrolytic stability and low-temperature properties as compared to adipate polyester based urethanes. [Pg.999]

A variety of urethane coating systems has been introduced based on hydroxyl-containing acrylic and methacrylic ester copolymers that contain hydroxyethyl acrylates or methacrylates and that are generally cured with aliphatic di- or polyisocyanates. Depending upon the type and relative amounts, acrylate or other saturated esters, for example, adipate-isophthalic esters, are also used in combination with aliphatic polyisocyanates. [Pg.999]

One-Package Moisture-Cure Urethane Coatings (ASTM Type 2). One-package moisture-cure urethane coatings consist of isocyanate-terminated polymers cured by atmospheric moisture. The rate of cure depends upon the humidity in the air and the presence of certain tertiary amine catalysts that accelerate the N(X)-water reaction. A major difficulty with this type of coating system is pigmentation. [Pg.1008]

Two-Package Polyol Urethane Coatings (ASTM Type 5). Two-package polyol urethane coatings consist of isocyanate-terminated adducts of polymers that are cured by reaction with di- or polyfunctional hydroxyl-containing materials. The latter may consist of low- to medium-weight polyols with a polyester, polyether, polyether urethane, or castor oil backbone. When the two components (OH- and NC0-) are mixed together, they have only a limited pot life. Therefore, the components are mixed prior to application. Catalysts may be used to speed up the cure either for room temperature or oven cure. [Pg.1008]

One Hundred Percent Solids Coatings. As indicated in the introduction, environmental restrictions have led to increasing emphasis on either high-solids or even 100% solids urethane coatings. The latter may consist of either solventless liquid coatings or solid powder coatings. Relatively little information is currently available on these types of coatings. [Pg.1013]

Urethane group containing-coatings can also be obtained from other types of compounds capable of generating Isocyanates. These are aminimides, especially those based on methacrylic acid (189-191) ... [Pg.1017]

A relative new type of moisture-cure urethane coating consists in the formation of terminal oxazolidine group containing systems... [Pg.1017]

Remington, W. J. E. I. Du Pont de Nemours Co., Elastomer Chemicals Department, "Pigmenting Prepolymer-Type Urethane Coatings," Aug 1961. [Pg.1025]

One major automobile manufacturer was concerned about the use of urethane coatings with regard to solvent safety and emissions regulations. The cost and size of the complex coating supply and solvent evaporation equipment were other issues. Also, a 2 hr oven time limited the type of board it could coat and presented a severe handicap to short-run production and just-in-time delivery systems. [Pg.782]

Chem. Descrip. Org. and inorg. colorant disp. in polyether polyol base Uses Pigment tor polyether-type coatings, RIM systems, and MOCA side ot TDI cast urethanes Properties M.w. 6500 hyd. no. 26 Colormatch ED Series [Plasticolors]... [Pg.206]

See other pages where Urethane coating types coatings is mentioned: [Pg.1019]    [Pg.1030]    [Pg.785]    [Pg.92]    [Pg.10]    [Pg.365]    [Pg.203]    [Pg.92]    [Pg.113]    [Pg.89]    [Pg.66]    [Pg.902]    [Pg.986]    [Pg.990]    [Pg.1005]    [Pg.1007]    [Pg.1007]    [Pg.1008]    [Pg.1008]    [Pg.1008]    [Pg.1008]    [Pg.1021]    [Pg.10]    [Pg.374]   


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