Resin technologies

Polyethylene. Traditional melt spun methods have not utilized polyethylene as the base polymer because the physical properties obtained have been lower compared to those obtained with polypropylene. Advances in polyethylene technology may result in the commercialization of new spunbonded stmctures having characteristics not attainable with polypropylene. Although fiber-grade polyethylene resin was announced in late 1986 (11,12), it has seen limited acceptance because of higher costs and continuing improvements in polypropylene resin technology (see Olefin POLYMERS, POLYETHYLENE). 

Both regulatory limits on the amount of organic solvents allowed in paints and advancements in alkyd resin technology have resulted in the development of higher soHds alkyd resins that requke less solvent for dilution and viscosity reduction. In addition, developments of water-reducible alkyds and alkyd emulsions have resulted in alkyd-based paints that requke less organic solvent in thek formulations. 

T. C. Patton, Resin Technology, Formulating Techniques andNllied Calculations, Wiley-Interscience, New York-London, 1962. 

Liquid-crystal (79), advanced polyimide, and amorphous-nylon resin technologies (60) will be appHed. 

The so-called phenoxy resins were a development of epoxide resin technology which had hitherto been used exclusively in the thermosetting resin field (see Chapter 26). As with the most important epoxide resins they are prepared by reacting bis-phenol A with epichlorohydrin to give the following structure (Figure 21.9) ... 

In recent years there have been comparatively few developments in phenolic resin technology apart from the so-called Friedel-Crafts polymers introduced in the 1960s and the polybenzoxazines announced in 1998 which are discussed briefly at the end of the chapter. 

PATTON, T. c., Alkyd Resin Technology, Interscience, New York (1962)... 

Gianno, R. (1990). Semelai Culture and Resin Technology. Memoirs of the Connecticut Academy of Arts and Sciences, Volume XXII, Newhaven, Connecticut. 

In the transportation industry, there is an ever increasing use in auto, truck and bus applications. The advent of the electric vehicle, which may demand vastly improved weight reduction over today s state-of-the-art vehicles, would be a natural extension of current unsaturated polyester resin technologies. 

What was the first synthetic plastic Although some nineteenth-century experiments should be mentioned, such as the 1869 molding process for cellulose nitrate discovered by John and Isaiah Hyatt, probably the first major breakthrough came in 1910 with Leo Baekeland s discovery of phenol formaldehyde resins (Bakelite ). These are still the leading thermoset plastics made today. The pioneering work of Wallace Carothers at Du Pont in 1929 produced the nylons now used primarily as fibers but known as the beginning of thermoplastic resin technology. 

Can you explain why there are so many terms, such as novolac, resole, etc., used in phenolic resin technology ... 

Schlack [2] and Castan [3,4] are credited with the earliest U.S. patents describing epoxy resin technology. Greenlee [5] further emphasized the use of bisphenols and their reaction with epichlorohydrin to yield diepoxides capable of reaction with crude tall oil resin acids to yield resins useful for coatings. The use of diepoxide resins that are cured with amines was reported by Whittier and Lawn [6] in a U.S. patent in 1956. 

Epoxy resin technology has been reviewed and a number of relevant references are available [7,11-16]. 

B-68MI11501 R. J. Perez in Epoxy Resin Technology , ed. P. F. Bruins Interscience, New... 

H 4. Hayes, B. T., W. J. Read, and L. H. Vaughan Some new chemical and physical aspects of polyester resin technology. Chem. Ind. (London) 1957, 1162. 

The only major impediment to the development of SIRs on an industrial hydrometallurgical scale is the problem of leakage of the reagent from the resin phase into the aqueous feed solution, a problem that is more severe in the first type of SIRs than in the Levextrel resins. If this problem can be solved, a bright future is predicted for this concept in resin technology. 

Sheet and Bulk Molding Compounds. The activity with SMC and and BMC is based on resin technology which was known more than 20 years ago (3). The key concept involves increasing the viscosity of the unsaturated polyester resin. The polyester resin with an initial viscosity of several thousand centipoise is advanced chemically to a viscosity of several million centipoise. 

The bulk of the saccharides in soil aqueous extracts are contained in the FA fraction, or the organic fraction that remains in solution on acidification of soil extracts. The introduction of XAD resin technology (see Section 1.3.2) for the fractionation of soil organic extracts has allowed some separation of saccharides from what are considered to be the true FAs. Swincer et al. (1968) deserve to be credited with that concept. They used Polyclar-AT [a (poly)vinylpyrrolidone resin used for... 

Meath, A. R. Chemistry, Properties, and Applications of Epoxy Novolac, Flexible Epoxy, and Flame Retardant Epoxy Resins, Chapter 3 in Epoxy Resin Technology, P. F. Bruins, ed., Interscience Publishers, New York, 1968, p. 34. 

Bruins, P. F., Epoxy Resin Technology, Interscience Publishers, New York, 1968, p. 166. 

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