resin

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resin

resin, any of a class of amorphous solids or semisolids. Resins are found in nature and are chiefly of vegetable origin. They are typically light yellow to dark brown in color; tasteless; odorless or faintly aromatic; translucent or transparent; brittle, fracturing like glass; and flammable, burning with a smoky flame. Resins are soluble in alcohol, ether, and many hydrocarbons but are insoluble in water. When heated, they soften and finally melt. Their chemical composition varies, but most are mixtures of organic acids and esters. Resins are generally classified according to their source or by such qualities as hardness or solubility. Natural resins are found as exudations, often as globules or tears, on the bark of various trees (mostly pines and firs) or on other living plants; they also occur as fossils or as exudations from the bodies of certain scale insects (see lac). Some natural resins, called oleoresins, contain both a resin and an essential oil; they are often viscid, sticky, gummy, or plastic. Other resins are exceedingly hard and resistant to most solvents, softening only at high temperatures. The primary uses for most resins are in varnish, shellac, and lacquer, in medicine, in molded articles (e.g., pipe mouthpieces), and in electrical insulators. See amber; balsam; benzoin; Canada balsam; copaiba; dragon's blood; mastic; rosin; turpentine.
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resin

[′rez·ən]
(organic chemistry)
Any of a class of solid or semisolid organic products of natural or synthetic origin with no definite melting point, generally of high molecular weight; most resins are polymers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

resin

A nonvolatile solid or semisolid organic material, usually of high molecular weight; obtained as gum from certain trees or manufactured synthetically; tends to flow when subjected to heat or stress; soluble in most organic solvents but not in water; the film-forming component of a paint or varnish; used in making plastics and adhesives.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

resin

1. any of a group of solid or semisolid amorphous compounds that are obtained directly from certain plants as exudations. They are used in medicine and in varnishes
2. any of a large number of synthetic, usually organic, materials that have a polymeric structure, esp such a substance in a raw state before it is moulded or treated with plasticizer, stabilizer, filler, etc
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
The global high temperature composite resin market looks promising with opportunities in aerospace & defense, pipe & tank and electrical & electronics industries.
These fillings are made most often of porcelain, are more resistant to staining than composite resin material but are also more abrasive.
Bis-GMA composite resin was dispensed directly into the impression, from the cartridge, by means of an auto-mixing tip using a dispensing gun.
In the present study, the following six composite resin materials were tested: Tetric EvoCeram, Tetric EvoFlow, Filtek Ultimate, Filtek Ultimate Flow, G-aenial and G-aenial Flo.
Repair of an aged, contaminated indirect composite resin with a direct, visible-light-cured composite resin.
Amalgam (left), composite resin (center), and glass ionomer (right) restoration materials in embedding molds.
Effect of different mechanical and chemical surface treatment on repaired bond strength of an indirect composite resin was evaluated by Soodabeh Kimyai et al in 2015.
Abstract: The present study aimed to evaluate effects of different surface treatments and aging of composite cylinders on bond strength of composite resin repair.
During the passing time, esthetic qualities (color, chromaticity, and translucency) and mechanical properties (strength, wear resistance, and water sorption) of composite resin materials have been improved by the changes of the chemical structure of organic matrix and particle sizes and quantities of fillers [5, 6].
With regard to a decrease in bond strength, some studies have proposed that remnants of peroxide or oxygen may be responsible for inhibiting the polymerization of composite resin [8, 9].
CE fume hoods are constructed totally of composite resin for superior chemical resistance, no rust, and can be supplied with or without an exhaust blower in standard or explosion proof models.

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