U.S. 4,656, 214 Stain resistant plasticisers

Abstract

<dm:abstracts xmlns:dm="http://www.elsevier.com/xml/dm/dtd"><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" view="all" class="author" id="aep-abstract-id5"><ce:section-title>Publisher Summary</ce:section-title><ce:abstract-sec view="all" id="aep-abstract-sec-id6"><ce:simple-para id="fsabs028" view="all">The furan or furane resins mainly find use because of their excellent chemical and heat resistance. In the past, they have mainly been used in applications peripheral to the plastics industry such as foundry resins, for chemically resistant cements, and for binders. Recent developments have facilitated their use in laminates for chemical plant. The two intermediates of commercial furan resins are furfural and furfuryl alcohol. Furfural occurs in the free state in many plants, but is obtained commercially by degradation of hemicelluloses constituents present in these plants. There are a number of cheap sources of furfural, and theoretical yields of over 20% may be obtained from both corn cobs and oat husks. Furfural is a colorless liquid, which darkens in air and has a boiling point of 161.7°C at atmospheric pressure. Its principal uses are as a selective solvent used in such operations as the purification of wood resin and in the extraction of butadiene from other refinery gases. It is also used in the manufacture of phenolfurfural resins and as a raw material for the nylons. The material will resinify in the presence of acids but the product has little commercial value. Catalytic hydrogenation of furfural in the presence of copper chromite leads to furfuryl alcohol, the major intermediate of the furan resins The alcohol is a mobile liquid, light in color, with a boiling point of 170°C. It is very reactive and will resinify if exposed to high temperatures, acidity, air, or oxygen. Organic bases, such as piperidine and <ce:italic>n</ce:italic>-butylamine are useful inhibitors.</ce:simple-para></ce:abstract-sec></ce:abstract></dm:abstracts>