Aircraft finishes

Polyester resins combined with aliphatic polyisocyanate resins have outstanding weather resistance, good substrate adhesion, and high flexibility even under very large temperature changes (aircraft finishes). 

Uses UV stabilizer, protectant for Aim and substrate in ciear wood coatings, coiored transparent wood finishes, appiiance/mefai fumifure topcoats, aircraft finishes, asphaific roof coatings, piastic dear coats, wood furniture coatings... 

Mineral oli, Rudol White Fonoline Yellow Fonoline protectant, aircraft finishes Dapro UVAL-40 Dapro UV CW-30 Dapro UV ST-35 protectant, appliance topcoats Dapro UVAL-40 Dapro UV CW-30 Dapro UV ST-35... 

Polyurethane Floor varnish Aircraft finish Ketones esters EEAc Aromatic hydrocarbons Users may insist on solvents with a very low water content e.g. 0.1% wt. max. 

Other important markets include automotive refinish coatings, maintenance coatings, aircraft finishes, camouflage coatings for military vehicles, wire enamels, magnetic tape, and coatings for plastics. 

Polyurediane Solvent, waterborne, powder Air dry, bake Chemical resistance, abrasion resistance, hardness, exterior durability Some types yellow and chalk readily on exteriOT exposure Moderate, high Aircraft finishes, maintenance paints, metal and pla coatings... 

Exterior conunercial aircraft finishes must resist ultraviolet degradation, erosion by air, loss of adhesion at high speeds, rapid temperature changes, chemical attack by hydraulic fluids, and film mpture. 

A wide range of polyurethane-type products has become available in recent years for coating applications. These include simple solutions of linear polyurethanes, two-pot alkyd-isocyanate and polyether-isocyanate systems and a variety of prepolymer and adduct systems. The coatings can vary considerably in hardness and flexibility and find use mainly because of their toughness, abrasion resistance and flexibility. Uses include metal finishes in chemical plant, wood finishes for boats and sports equipment, finishes for rubber goods and rain-erosion-resistant coatings for aircraft. One type of coating is potentially competitive with PVC leathercloth. Both alkyd-di-isocyanate and adduct-diisocyanate compositions may be coated on to fabrics from solutions of controlled viscosity and solids content. Such coated fabrics are soft, flexible and, unlike PVC leathercloth, free from plasticisers. 

These requirements are usually met with two-pack paints based on hydroxyl-rich polyester or acrylic resins in the pigmented pack and aliphatic polyisocyanates in the activator pack. Cure with this type of finish is relatively fast and complete even at low ambient temperatures. An alternative finish is an acrylic lacquer, similar to the lacquer used for refinishing motor cars. These finishes are applied to the assembled aircraft by operators protected by air-fed hoods and using airless or conventional spray guns. High durability pigments are included. 

Corrosion-inhibited petroleum-based waxes deposited from solvent are finding application in both the automotive and aircraft industries for the supplementary protection of hollow sections of the finished product. These waxes are applied by airless or air-assisted pressure-feed spraying techniques... 

Anodic alumina oxides find steadily growing application in various spheres of technology. Traditionally, they are most popular in civil industrial engineering for producing protective and decorative surface finish in panels and different objects. These applications are well reviewed in the literature.321 Anodic alumina is also widely used in the aircraft and aerospace industry for adhesive bonding of aluminum structures,322-324 composite materials, etc. 

A third example [28] involved a Superfund site. Octolig was used in a bench test of material from the Liberty Industrial Finishing Superfund site, a 30-acre parcel in the village of Farm-ingdale, Nassau County, New York state. At this location. Republic Aviation produced military aircraft for the US government from the late 1930s until the 1960s. Operations involved... 

Their uses are very extensive, such as aircraft canopies windows, insttument dials, safety glass, contact lenses, lighting fixtures, refrigerator parts, dentures, paints finishes, adhesives etc. The synthetic fibers Orion,... 

Perhaps the biggest thrust for the development of high performance polymers over the next 10 years will be in the aerospace industry where materials will be required for a fleet of high speed civil transports (supersonic transports). At a speed of Mach 2.4, an aircraft surface temperature of about 150 to 180°C will be generated. The life requirement of materials at these temperatures will be about 60000 hours. Many different types of materials such as adhesives, composite matrices, fuel tank sealants, finishes and windows will be needed. These materials must exhibit a favorable combination of processability, performance and price. The potential market for these materials total several billions of US dollars. 

Toluene diisocyanate is commonly produced as a mixture of the 2,4- and 2,6-iso-niers, that is used as a monomer in the preparation of polyurethane foams, elastomers and coatings, as a cross-linking agent for nylon-6, and as a hardener in polyurethane adhesives and finishes. Polyurethane elastomers made from toluene diisocyanates are used in coated fabrics and clay-pipe seals. Polyurethane coatings made from toluene diisocyanates are used in floor finishes, wood finishes and sealers, and in coatings for aircraft, tank trucks, truck trailers and truck fleets (United States National Library of Medicine, 1997). 

Ah, you mean aircraft. The Doctor faced forward. Gigantic hangar doors were parting, rendered incongruously silent by the cockpit canopy. You ll finish him easily, then, this Mogushestvo ... 

Esters are widely used in industry as solvents. Ethyl acetate is a good solvent for a wide variety of compounds, and its toxicity is low compared with other solvents. Ethyl acetate is also found in household products such as cleaners, polishes, glues, and spray finishes. Ethyl butyrate and butyl butyrate were once widely used as solvents for paints and finishes, including the butyrate dope that was sprayed on the fabric covering of aircraft wings to make them tight and stiff. Polyesters (covered later in this section and in Chapter 26) are among the most common polymers, used in fabrics (Dacron ), films (VCR tapes), and solid plastics (soft-drink bottles). 

The toxicity of some flame-retardant components and of their combustion gases is a particular concern for flame-retardant finishes, especially if based on halogens and several heavy metals. Therefore, aircraft textile equipment has to fulfil special requirements, for example, smoke density and toxicity tests. Toxicity problems include ... 

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. 

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