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Chemical and Solvent Resistance

Nitrocellulose based lacquers often contain short or medium oil alkyds to improve flexibiUty and adhesion. The most commonly used are short oil non drying alkyds. Amino resins or urethane resins with residual isocyanate functional groups may be added to cross-link the coating film for improved solvent and chemical resistance. The principal appHcations are furniture coatings, top lacquer for printed paper, and automotive refinishing primers. [Pg.41]

TABLE 3 SOLVENT AND CHEMICAL RESISTANCE OF PSEUDO-IPN COATINGS... [Pg.318]

With the advent of the soluble stereoregulating catalysts, so-called older polymers have been synthesized with additional control over the structure giving products with enhanced strength and dimensional stability. Amorphous PS is relatively brittle, requiring a plasticizer to allow it to be flexible. The use of soluble stereoregulating catalysts allowed the synthesis of sPS with a I m of about 270°C and a Tg of about 100°C with good solvent and chemical resistance. DOW commercialized sPS under the trade name Questra in 1997. It is used in specialty electrical and under-the-hood automotive applications. [Pg.610]

Dicthylcncglycol-lm-(allylcarbonatc). marketed as C.R-39 . is finding increasing use where optical transparency is required. It is the primary material used in the manufacture of plastic lenses for eyewear because of its light weight, dimensional stability, abrasion resistance, and dye-ability. Other applications for this product include instrument panel covers, camera filters, and myriad glazing uses. In these applications, the solvent and chemical resistance of die material are important. [Pg.60]

Data sheets on the solvent resistance of various plastics and rubbers are available from the primary manufacturers. In addition, a number of O-ring manufacturers publish information on the solvent and chemical resistance of elastomers used in O-rings. For example, the Parker Seal Company, 17325 Euclid Ave., Cleveland, OH, publishes a Seal Compound Manuui which contains this information. [Pg.143]

Attention also is directed to other chapters which are useful adjuncts to the present one Inert Gases and Their Purification (Chapter 3), Purification of Solvents and Reagents (Chapter 4), and Joints, Stopcocks, and Valves (Chapter 8). The solvent and chemical resistance of elastomers, which are used in O-ring joints and septa, are discussed in Chapter 8 and Appendix III. [Pg.177]

Elastomers and, to a lesser extent, plastics tend to swell in the presence of solvents. Frequently, this swelling is accompanied by a loss in strength. In addition, some plastics are dissolved by certain solvents, and all-polymeric materials may be chemically destroyed. It is in the areas of solvent and chemical resistance that most problems are encountered in the laboratory. [Pg.303]

Fillers often have a significant effect on the moisture resistance, the moisture-vapor transmission rate, and the solvent and chemical resistance of the cured adhesive bond. The effect, however, can be in either direction. Some fillers such as calcium carbonate tend to lower acid resistance, whereas others, such as silica or aluminum, may tend to lower alkali resistance. [Pg.177]

Because of the solvent and chemical resistance of acetal copolymer, special etching treatments have been developed for surface preparation prior to adhesive bonding. A chromic acid etch and a hydrochloric acid etch have been suggested. Acetal parts that have been formed by heat treatment or machining should be stress-relieved before etching. [Pg.368]

Cyclic siloxane compounds containing an aliphatic unsaturation component and fluorinated alkyl groups were prepared in a two-step process with overall yields >53%. These polymerizable agents are characterized as having water and oil repellency in addition to weather, solvent, and chemical resistance. [Pg.247]

Table 7.3 Solvent and chemical resistance of cured liquid polysulphide (LP) compounds. Source Morton International Ltd, Coventry, UK... [Pg.162]

Properties White crystals. Mp 270C (sublimes), approximately 99% pure. Derivatives (alkyl ada-mantanes) have potential uses in imparting heat, solvent, and chemical resistance to many basic types of plastics. Synthetic lubricants and pharmaceuticals are also based on adamantane derivatives. Adamantane diamine is used to cure epoxy resins. [Pg.23]

Urethane coatings for wood surfaces, prepared with lignin-based polyester-ether-polyol, have demonstrated exceptional properties in terms of solvent and chemical resistance (18), and they provide the coated wood surface with an attractive appearance. [Pg.330]

These blends are immiscible, thus should be compatibilized and toughened. Addition of POM to PC improves the solvent and chemical resistance [Miller, 1972], PC blends with POM and TPU were easy to mold into articles having high impact... [Pg.75]

Polyamideimides (PAI) were obtained by polycondensation of imides with aromatic di-amines, [-N=(CO)2=(t)-CO-NH-R-NH-CO-(t)=(CO)2=N-] (Tg = 275°C, HDT = 265-280°C). The resin has high tensile and impact strength from T = -190 to T = 260°C, dimensional stability, good dielectric properties, solvent and chemical resistance, flame retardancy, good UV stability and low outgassing in high vacuum. To improve processability, PAI was blended with PA, PSF, or PEST [Toray Industries, Inc., 1979]. [Pg.84]

Table 12.25 provides information on the publications pertinent to solvent and chemical resistance of polymer blends. The chemical and solvent susceptibilities of the commercial polymer blends (as reported by the manufacturers) are listed in Table 12.26. [Pg.905]

Incorporation of semicrystalline polymer into an amorphous resin to improve solvent and chemical resistance (e.g., in blends of PC with PEST). [Pg.1453]


See other pages where Chemical and Solvent Resistance is mentioned: [Pg.192]    [Pg.328]    [Pg.320]    [Pg.319]    [Pg.322]    [Pg.495]    [Pg.316]    [Pg.319]    [Pg.144]    [Pg.153]    [Pg.633]    [Pg.320]    [Pg.328]    [Pg.27]    [Pg.192]    [Pg.3322]    [Pg.730]    [Pg.96]    [Pg.41]    [Pg.24]    [Pg.192]    [Pg.5]    [Pg.954]    [Pg.32]    [Pg.77]    [Pg.325]    [Pg.678]    [Pg.679]    [Pg.894]    [Pg.1170]    [Pg.41]   
See also in sourсe #XX -- [ Pg.316 , Pg.318 , Pg.319 ]




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