Applications resins

Flame-Retardant Resins. Flame-retardant resins are formulated to conform to fire safety specifications developed for construction as well as marine and electrical applications. Resins produced from halogenated intermediates (Table 5) are usually processed at lower temperatures (180°C) to prevent excessive discoloration. Dibromoneopentyl glycol [3296-90-0] (DBNPG) also requires glass-lined equipment due to its corrosive nature. Tetrabromophthalic anhydride (TBPA) and chlorendic anhydride (8) are formulated with ethylene glycols to maximize flame-retardant properties reaction cycle times are about 12 h. Resins are also produced commercially by the in situ bromination of polyester resins derived from tetrahydrophthalic anhydride... 

Uses. Furfuryl alcohol is widely used as a monomer in manufacturing furfuryl alcohol resins, and as a reactive solvent in a variety of synthetic resins and applications. Resins derived from furfuryl alcohol are the most important application for furfuryl alcohol in both utility and volume. The final cross-linked products display outstanding chemical, thermal, and mechanical properties. They are also heat-stable and remarkably resistant to acids, alkalies, and solvents. Many commercial resins of various compositions and properties have been prepared by polymerization of furfuryl alcohol and other co-reactants such as furfural, formaldehyde, glyoxal, resorcinol, phenolic compounds and urea. In 1992, domestic furfuryl alcohol consumption was estimated at 47 million pounds (38). 

A unit referred to as the Higgins Loop has been popular in water treatment, as well as other applications. Resin is pulsed at regular intervals around a rectangulady shaped loop. The diameter of the adsorption section is larger than that of the regeneration section. 

Pigment Characteristics Day-Glo Radiant Application Applicable Resins... 

When the treated solution is to be used as food, food additives, or in pharmaceutical applications, resins must be used which are acceptable for such processing. 

Another difference that is sometimes apparent is a lower LCB level in polymers produced in fluidized-bed reactors. As noted in Sections 9 and 10, lower LCB is the result of use of a lower chromium loading on the catalyst, and of longer residence times, which improves the polymer yield. For example in blow-molding applications, resins produced in the fluidized-bed process are likely to exhibit higher die swell than resins made in the slurry process, when a similar catalyst is used. 

Emulsion polymerization leads to a very narrow particle size distribution, which is suitable for use in plastisol applications. Resins having both a monodisperse and bimodal particle size distribution are produced. Blending of latexes is sometimes practiced with the extensive use of seed-latex techniques. A simplified schematic flow sheet for a continuous emulsion polymerization process is given in Figure 7. 

Reports of new materials and formulations and resin properties are prolific. Articles of a topical or applied interest include probes for in-situ hardness measurements on adhesives, photobase generators for image recording devices, oxygen inhibition in packaging applications, resins for sign boards, potentiometric sensors, new photodefinable polyimides, visible curable resists, " clay composites, putties, silica fillers, curable paints, soluble photocurable systems, fluorinated coatings and in-... 

This chapter will provide a concise summary of the main technologies and applications. Distinction will be made between PE and PP in terms of their suitability for specific fiber and nonwoven applications. Resin choice, in terms of its molecular weight and formulation, is critical not just to the final product performance but also to the type of technology used to convert the resin. 

Epoxies are preferable to other resin systems in that they can be formulated to bond to moist hardened concrete and yet be able to cure within the wet environment of the fresh concrete. Polyesters do not generally bond reliably under wet conditions. The system must also be selected with due regard to the temperature of application. Resins claimed to have good bonding performance at 20 C may give rather poor bond strengths at the lower cure temperatures prevalent on UK construction sites during much of the year. 

Amino resins are used by the paper industry in large volume for a variety of applications. The resins are divided into two classes according to the mode of application. Resins added to the fiber slurry before the sheet is formed are called wet-end additives and are used to improve wet and dry strength and stiffiiess. Resins applied to the surface of formed paper or board, almost invariably together with other additives, are used to improve the water resistance of coatings, the sag resistance in ceiling tiles, and the scuff resistance in cartons and labels. 

Uses Castings used for aircraft glazing, electrical components, decorative applications. Resins used for premix and prepreg molding materials, matched metal molding and hand lay-up molding. ... 

As a rule of thumb, if any additive is added to the formulation of the PP, it should be tested for its likely impact on food and medical applications. Resin should conform to the regulations for health and safety. 

Assuming specific medium influence, its concentration, and operating temperature, media class I to X and the applicable resin groups are determined (example DIBt media lists [7]). This will result in the suggestion of several resin groups with key numbers, see also Appendix A. 17. 

Insulation Applications Resin electrical properties become critical for insulation apphcations (the compound in direct contact with the metal conductor). Resins need to be specially manufacmred in order to minimize residual initiators, catalysts, and contaminants, which can negatively impact electrical properties. One of the ways this is accomplished is by carrying out the suspension resin polymerization process in deionized water and minimizing residual surfactant. Mass resins have found use in this application in the past due to the fact they do not require electrically deleterious surfactants agents in their manufacture. In order to minimize raw material inventory, many wire and cable manufacmrers who compound their own PVC formulations attempt to use the same resin for both jacket and insulation compounds. Because of this, resins with a T-value around 70 also predominate in insulation applications. 

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