Coatings two-component

Use Baked coatings, two-component formulations, wire coatings, tank linings, maintenance paints, masonry coating. 

Chem. Descrip. Acrylic polymer in naptha, toluene Uses Leveling agent, anticratering agent for solvent-based systems, thermoset high-solids coatings, two-component urethanes, food-contact coatings... 

Uses Surfactant, slip agent, mar resist, aid for coatings, two-component urethanes, polyester-melamine, epoxies, alkyd/melamine, selfcrosslinking acrylics, etc. 

Sanitary ware, including tubs, showers, combined units, basins, and toilet tank, may be made of thermoformed ABS or acryHc sheet, molded glass-fiber-reinforced polyester, or cast acryHc resins. The glass-polyester type dominates the tub/shower market. It is possible to install the units as a two-component system, assembled in place. Gel coats may be of thermoformed decorative acryHc skins. To reduce the smoke generated by fire, methyl... 

A frequently cited example of protection from atmospheric corrosion is the Eiffel Tower. The narrow and, for that age, thin sections required a good priming of red lead for protection against corrosion. The top coat was linseed oil with white lead, and later coatings of ochre, iron oxide, and micaceous iron oxide were added. Since its constmction the coating has been renewed several times [29]. Modern atmospheric corrosion protection uses quick-drying nitrocellulose, synthetic resins, and reaction resins (two-component mixes). The chemist Leo Baekeland discovered the synthetic material named after him, Bakelite, in 1907. Three years later the first synthetic resin (phenol formaldehyde) proved itself in a protective paint. A new materials era had dawned. 

Moisture-curable urethane systems (one-pack) can be considered as two-component systems which use atmospheric moisture as the second component. One-pack urethane coatings can be produced that are similar in physical properties to the two-pack systems for almost all applications. These highly complex systems can have a great deal of flexibility. Claimed advantages are a one-pack system, rapid cure, even at low temperatures, excellent chemical and abrasion resistance and good flexibility. Although these systems have been available for some time in other countries of Europe, they are only recently beginning to be of interest in the UK. 

The conclusions are that when coatings have resistances greater than 10 0cm (i.e. when corrosion is absent) then their resistances may be measured by either d.c. or a.c. However d.c. measurements can be made more quickly, they are easier to make and the apparatus is less costly. It has also been suggested that such measurements provide a basis for the prediction of performance. On the other hand, when corrosion has started, then a.c. should be used, since the values obtained can be resolved into two components, which provide a means of detecting and following the corrosion beneath the coating. 

Where fumes or deposits which act as anti-oxidants are present, no orthodox paint which dries by oxidation can give satisfactory service. Instead, a coating which dries either by evaporation (e.g. a selected chlorinated rubber paint), or by a cross-linking reaction (e.g. a catalysed epoxy or two-component polyurethane paint) must be used. 

Few non.chemists know exactly what an epoxide is. but practically everyone has used an "epoxy glue for household repairs or an epoxy resin for a protective coating. Epoxy resins and adhesives generally consist of two components that are mixed just prior to use. One component is a liquid "prepolymer/ and the second is a "curing agent" that reacts with the prepolymer and causes it to solidify. 

The model for a filled system is different. The filler is, as before, represented by a cube with side a. The cube is coated with a polymer film of thickness d it is assumed that d is independent of the filler concentration. The filler modulus is much higher than that of the d-thick coat. A third layer of thickness c overlies the previous one and simulates the polymeric matrix. The characteristics of the layers d and c are prescribed as before, and the calculation is carried out in two steps at first, the characteristics of the filler (a) - interphase (d) system are calculated then this system is treated as an integral whole and, again, as part of the two component system (filler + interphase) — matrix. From geometric... 

Example 6. High Solids, Two-Component, Clear, Aliphatic, Polyurea Coating. This example of an aliphatic, 100% urea coating utilizes polyaspartic esters as reactive diluents (see Section 4.2.3). These compounds allow fine tuning of reactivity and physical properties and eliminate the need for viscosity-reducing solvents. 

Example 9. Two-Component Waterborne Polyurethane Coating. This example utilizes the PUD from Example 8 in a two-component, waterborne coating formulation. An HDI-based, water-dispersible isocyanate is also prepared. 

High-solids, two-component, clear, aliphatic, polyurea coating, preparation of, 252-253 High-temperature annealing, 220 High-temperature bulk polyesterifications, 61-74... 

Turner, S. Richard, 1 Two-component (2-K), nonsagging, polyurea structural adhesive, preparation of, 255-256 Two-component (2-K) systems, 238-241 Two-component (2-K) waterborne polyurethane coatings, 206 preparation of, 254-255 Two-shot cast elastomer, preparation of, 249-250... 

If we want to use the Tafel slopes to obtain the empirical kinetics of polymerization, we have to use a metallic electrode coated with a previously electrogenerated thin and uniform film of the polymer in a fresh solution of the monomer. In some cases experimental Tafel plots present the two components (Fig. 4) before and after coating. 

The curing of two-component Isocyanate coatings appears to be strongly dependent on factors such as catalysis, temperature and relative humidity (8, 9),... 

Typically used for the coating of polyester and polyamide substrates with plasticised PVC. Chemically one-component bonding agents (e.g. aromatic polyiso-cyanurate) and two-component bonding agents (e.g. aliphatic polyisocyanate) liquids. 

Figure 2. Light stability of a high-solids, one-coat silver metallic paint based on a two component polyurethane. Test criterion gloss retention QUV irradiation. (HALS) Bis-(2,2,6,6-tetramethyl-piperidinyl-4)sebacate (UVA) 2-(2 -hydroxy-3, 5 -di-tert-amylphenyl) benzotriazole.

Sol-gel technology makes it possible to deposit onto glass substrates two-component coatings that consist of a mixture of silicon dioxide and an indicator (a dye that changes color as a function of the pH)48. The spectral and operational characteristics of the resulting coatings are similar to one-component coatings. 

Two-bath, two-stage dyeing process, 9 198 Two-bladed impellers, 16 672-673 Two-color thermometers, 24 457 Two-component epoxy—amine coatings, 10 443... 

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