Furan Resin

furan resin

[′fyu̇r‚an ‚rez·ən]
(organic chemistry)
A liquid, thermosetting resin in which the furan ring is an integral part of the polymer chain, made by the condensation of furfuryl alcohol; used as a cement and adhesive, casting resin, coating, and impregnant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Furan Resin


any of a series of oligomeric products prepared from compounds containing a furan ring that are capable, on heating or in the presence of catalysts, of converting into cross-linked polymers. The most important resins are obtained from furfuryl alcohol and from the products of the interaction of furfu-ryl alcohol with furfural (furfuryl furfural) and furfural with acetone. The last two, given an alkaline medium and a molar ratio of 1:1, form the monomer FA, which is mainly a mixture of mono-furfurylidene (50–65 percent) and difurfurylidene acetone (40–25 percent). Furan resins are generally formed during the preparation of compound materials from the indicated products. All resins harden slightly upon heating; the process is accelerated in the presence of acid catalysts, especially aromatic sulfo acids and mineral acids.

The hardening products are known for their high resistance to heat, acids, and alkalies, as well as their high coking values (85–90 percent). The monomer FA is used as a binder in the manufacture of polymer concrete and polymer mortars, which, unlike concrete, contain finely dispersed powders (sand, powdered andésite combined with carbon-graphite powder) as a filler. The mortars have higher mechanical strength, plasticity, and corrosion resistance and lower friability than polymer concrete; they are used to protect concrete building structural members in chemical plants and as refractory lining for chemical equipment, especially equipment used in the pulp and paper industry. Furfuryl alcohol polymers are used as binders in the manufacture of glass plastics, which are known for their extremely high resistance to alkalies and heat; furfurylfurfural resin, which contains benzenesulfonic acid as a hardening agent, is used as a binder for cold-hardened glass plastics. Furan resins are also used as binders in molded materials containing asbestos fiber and graphite.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Terasawa et al produced a lignocellulose molded product with adequate moisture resistance by mixing the bioresin with furan resin. Furan is a natural thermosetting resin from carbonizing corncobs.
The work (2-5) mainly consists of polymerization of bisfuran or furan resin with bismaleimide derivative.
The sand used is typical metalcasting facility sand bonded with furan resin.
Pattern-Less Production of Furan Resin Bonded Sand Moulds in Rapid Protoryping, I.
Highlights of Compared Coremaking Processes Process Binder Reaction: Shell Molding Phenolic Novolak + Hexa (Croning) Hotbox Reactive Phenolic or Furan Resin + Hardener Warmbox Reactive Modified Furan Resin + Special Hardener PUR Coldbox Resole + Diisocyanate + Amine Gas Curing Epoxy Modified Epoxy Resin + Oxidizer + [SO.sub.2] (Epoxy [SO.sub.2]) Methyl Formiate (or Alkaline Resole + Methyl Formiate or Resole-[CO.sub.2]) [CO.sub.2] Process Temperature Abbreviation Shell Molding (Croning) 392-500F (200-260C) CR Hotbox 356-464F (180-240C) HB Warmbox 302-392F (150-200C) WB PUR Coldbox Room Temperature PUR-CB Gas Curing Epoxy (Epoxy Room Temperature EGH [SO.sub.2]) Methyl Formiate (or Room Temperature MF (or "Resole") Resole-[CO.sub.2])
The furan resin does not require a nitrogen catalyst, but in many cases still contains significant amounts of urea (a nitrogen compound) as a part of its furfuryl alcohol solvent system.
Foundries operating furan resin systems can mechanically reclaim 60-95% of sand, depending on the quality of the TABULAR DATA OMITTED material being cast.
It is colourless or pale yellow in appearance and used in the manufacture of furan resins and as a wetting agent and solvent for coating resins, nitrocellulose, cellulose acetate, and other soluble dyes.
In 3D Resins we offer acid cured furan resins as well as PDB phenol resins.
Manfredi, "Furan resins as replacement of phenolic protective coatings: structural, mechanical and functional characterization," Progress in Organic Coatings, vol.