epoxy resin

epoxide resin

n (Elements & Compounds) any of various tough resistant thermosetting synthetic resins containing epoxy groups: used in surface coatings, laminates, and adhesives

Thesaurus

Noun

epoxy resin - a thermosetting resin; used chiefly in strong adhesives and coatings and laminatesepoxy, epoxy glueadhesive, adhesive agent, adhesive material - a substance that unites or bonds surfaces togetherCrazy Glue - a commercial brand of epoxy gluesynthetic resin - a resin having a polymeric structure; especially a resin in the raw state; used chiefly in plastics

Translations

epoxy resin

[ə′päk·sē ′rez·ən] (organic chemistry) A polyether resin formed originally by the polymerization of bisphenol A and epichlorohydrin, having high strength, and low shrinkage during curing; used as a coating, adhesive, casting, or foam.

Epoxy resin

A group of thermosetting plastics. The uncured resin and hardener are kept separately and mixed just before use. They adhere strongly to metals, glass, concrete, stone, and rubber, and are resistant to abrasion, weather, acids and alkalis, and heat. Useful for repairing damaged concrete and for joining new concrete to old; for this purpose, a mixture of epoxy resin mortar can be used.

Epoxy Resin

any of a number of oligomeric products obtained by the polycondensation of epichlorohydrin with polyhydric phenols, alcohols, polyamines, or polybasic acids or by the epoxidation of compounds containing at least two double bonds.

The most widely used epoxy resins have the structural formula

These resins are obtained by reacting bisphenol A (diphenylol-propane) with epichlorohydrin in the presence of a base. The process has several stages, including polycondensation at 60°–100°C, rinsing with water to remove NaCl, and vacuum drying (13.3–26.6 kilo-newtons/m²) at 120°-140^oC. The molecular weight of the resins depends on the ratio of the reagents used. The resins may be prepared in the form of viscous yellow liquids (molecular weight, 350–750; soluble in acetone and toluene) or yellow or brown solids (molecular weight, 800–3,500; soluble in a mixture of toluene and butanol).

Depending on the curing agent used, epoxy resins may be cured (hardened) at either elevated temperatures (60°–180°C), ambient temperatures, or lowered temperatures (as low as –15°C). Curing agents include polyamines, polybasic acids and their anhydrides, and polyhydric phenols, as well as tertiary amines and BF₃ complexes. Upon curing, epoxy resins, unlike many other polymers, show little shrinkage (between 0.1 percent and 3 percent) and do not liberate volatile products.

Cured epoxy resins feature good adhesion to such materials as metals, glass, and concrete; they are also distinguished by their mechanical strength, chemical stability, heat resistance, water resistance, and good dielectric characteristics. The physicomechanical and technological properties of compositions that are based on epoxy resins vary widely and may be regulated by combining the resins with various monomers and polymers, as well as organic or mineral fillers. Epoxy resins are used as a base for high-strength binders and adhesives, hermetic sealers, varnishes, foam plastics, and electrical insulation compounds (seePOLYMER COMPOUNDS).

REFERENCES

Entsiklopediia polimerov, vol. 3. Moscow, 1977.
Lee, H., and K. Neville. Spravochnoe rukovodstvo po epoksidnym smolam. Moscow, 1973. (Translated from English.)

E. M. BLIAKHMAN

epoxy resin

A high-strength low-shrinkage polymer, especially designed for use in construction as an adhesive, a coating, or a foam.

epoxy resin

An adhesive and a bonding agent that acts as a hardener, a plasticizer, and a filler. Epoxy resin is used to repair and fill gaps in fiberglass and joints of reinforced concrete slabs, such as those on the runways, taxiways, aprons, and hardstands.

epoxy resin

resin

[rez´in] 1. a solid or semisolid organic substance exuded by plants or by insects feeding on plants, or produced synthetically; they are insoluble in water but mostly soluble in alcohol or ether. adj., adj res´inous.2. a compound made by condensation or polymerization of low-molecular-weight organic compounds.acrylic r's products of the polymerization of acrylic or methacrylic acid or their derivatives, used in fabrication of medical prostheses and dental restorations and appliances.anion exchange resin see ion-exchange resin.cation exchange resin see ion-exchange resin.cholestyramine resin a synthetic, strongly basic anion exchange resin in the chloride form which chelates bile salts in the intestine, thus preventing their reabsorption; used as an adjunctive therapy to diet in management of certain hypercholesterolemias and in the symptomatic relief of pruritus associated with bile stasis.composite resin a synthetic resin, usually acrylic based, to which a high percentage of ceramic reinforcing filler has been added, such as particles of glass or silica coated with a coupling agent to bind them to the matrix; used chiefly in dental restorations. Called also composite.epoxy resin a tough, chemically resistant, adhesive, flexible, dimensionally stable resin of epoxy" >epoxy polymers; used as denture base material.ion exchange resin a high-molecular-weight insoluble polymer of simple organic compounds capable of exchanging its attached ions for other ions in the surrounding medium; classified as (a)cation or anion exchange resins, depending on which ions the resin exchanges; and (b) carboxylic, sulfonic, and so on depending on the nature of the active groups.podophyllum resin a mixture of resins from podophyllum" >podophyllum, used as a topical caustic in treatment of laryngeal papillomas" >papillomas, condylomata acuminata" >condylomata acuminata, and other epitheliomas.

e·pox·y res·in

any thermosetting resin based on the reactivity of epoxy; used as adhesives, protective coatings, and embedding media for electron microscopy.

e·pox·y res·in

(ē-poksē rezin) Any thermosetting resin based on the reactivity of epoxy; used as adhesives, protective coatings, and embedding media for electron microscopy.

epoxy resin

epoxy resin

epoxide resin

epoxy resin

epoxy resin

Epoxy resin

Epoxy Resin

REFERENCES

epoxy resin

epoxy resin

epoxy resin

resin

e·pox·y res·in

e·pox·y res·in

epoxy resin

Synonyms for epoxy resin

noun a thermosetting resin

Synonyms

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