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Solution and Latex Coating

The rate of stripping or the stripabiUty on cataly2ed urethane and epoxy resin finishes can be increased by adding formic acid, acetic acid, and phenol. Sodium hydroxide, potassium hydroxide, and trisodium phosphate [10101-89-0] may be added to the formula to increase the stripabiUty on enamel and latex paints. Other activators include oleic acid [112-80-17, trichloroacetic acid [76-85-9], ammonia, triethanolamine [102-71-6], and monoethyl amine. Methylene chloride-type removers are unique in their abiUty to accept cosolvents and activators that allow the solution to be neutral, alkaline, or acidic. This abihty gready expands the number of coatings that can be removed with methylene chloride removers. [Pg.551]

Waterproof Finishes. Waterproofing results from coating a fabric and filling the pores with film-forming material such as varnish, mbber, nitroceUulose, wax, tar, or plastic. The materials may be appHed as hot melts, eg, waxes or some polymers, as solvent solutions, or as aqueous latexes. The continuity of the film provides the water resistance. Except for tents, tarpauHns, and covers, coated fabrics have been largely replaced by plastics, and by fabrics treated with water and oU repeUents that do not reduce permeabUity to air and water vapor. Eabrics are also commonly laminated to films, such that the total stmeture is waterproof (15), or in some cases water-resistant but breathable (16). [Pg.307]

Cellulose is also commercially modified by acetylation to produce a material suitable for X-ray and cine film. Commercially cellulose ethers are also prepared, such as methylcellulose. This material is water-soluble and gives a highly viscous solution at very low concentrations. Hence it is widely used as a thickener in latex paints and adhesives, in cosmetics and for coating pharmaceutical tablets. [Pg.19]

Poly(vinylidene chloride-co-acrylonitrile) is widely used as a latex coating for cellophane, polyethylene and paper. Since this copolymer is soluble in organic solvents, it is also used as a solution coating. Tile resistance to vapor permeability and the ease of printing on polyethylene and cellophane is increased by coating with this vinylidene chloride copolymer. [Pg.1358]

Polymer solutions and dispersions find many practical applications. We can cast films from some polymers, and we use many others to form coatings. Coatings can be produced from either solutions or dispersions such as polymer emulsions (latexes). Examples include paint, varnish, textile finishes, adhesives, and floor waxes. Other useful latex products are latex gloves, condoms, and balloons. [Pg.131]

Large irregular-shaped objects that are impossible to coat by dipping can be protected by spraying. All the liquid vinyls can be handled in this manner. Low-viscosity systems such as the solution vinyls and latexes can be handled easily on conventional suction feed equipment. Because of the acidic nature of vinyl latexes, the materials of construction of the spray equipment will have to receive special consideration. [Pg.1220]

Fig. 24. Release profiles of potassium chloride from osmotic tablets prepared by spraying a CA latex as a function of the plasticizer type and amount, and the coating temperature. Key (J) diethyl tartrate 120%, 50°C (2) diethyl tartrate 160%, 60°Q (J) trimethyl phosphate 160%, 60°C (4) ethylene glycol monoacetate 360%, 60 °C (5) ethylene glycol monoacetate 60%, 60 °C (6) organic solution, 35 °C (no plasticizer) [133]... Fig. 24. Release profiles of potassium chloride from osmotic tablets prepared by spraying a CA latex as a function of the plasticizer type and amount, and the coating temperature. Key (J) diethyl tartrate 120%, 50°C (2) diethyl tartrate 160%, 60°Q (J) trimethyl phosphate 160%, 60°C (4) ethylene glycol monoacetate 360%, 60 °C (5) ethylene glycol monoacetate 60%, 60 °C (6) organic solution, 35 °C (no plasticizer) [133]...

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