resin

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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 laclac,
resinous exudation from the bodies of females of a species of scale insect (Tachardia lacca), from which shellac is prepared. India is the chief source of shellac, although some is obtained from other areas in Southeast Asia.
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). 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 amberamber,
fossilized tree resin. Amber can vary in color from yellow to red to green and blue. The best commercial amber is transparent, but some varieties are cloudy. To be called amber, the resin must be several million years old; recently hardened resins are called copals.
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; balsambalsam
, fragrant resin obtained from various trees. The true balsams are semisolid and insoluble in water, but they are soluble in alcohol and partly so in hydrocarbons.
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; benzoinbenzoin
or benzoinum
, balsamic resin, the dried exudation from the pierced bark of various species of the benzoin tree (Styrax) native to Sumatra, Java, and Thailand; appearing as red-brown to yellow-brown tears.
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; Canada balsamCanada balsam,
yellow, oily, resinous exudation obtained from the balsam fir. It is an oleoresin (see resin) with a pleasant odor but a biting taste. It is a turpentine rather than a true balsam.
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; copaibacopaiba
, oleoresin (see resin) obtained from several species of tropical South American trees of the genus Copaifera. The thick, transparent exudate varies in color from light gold to dark brown, depending on the ratio of resin to essential oil.
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; dragon's blooddragon's blood,
name for a red resin obtained from a number of different plants. It was held by early Greeks, Romans, and Arabs to have medicinal properties; Dioscorides and other early writers described it.
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; masticmastic,
resin obtained from the small mastic tree Pistacia lentiscus (of the sumac family), found chiefly in Mediterranean countries. When the bark of the tree is injured, the resin exudes in drops. It is transparent and pale yellow to green in color.
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; rosinrosin
or colophony,
hard, brittle, translucent resin, obtained as a solid residue from crude turpentine. Usually pale yellow or amber, its color may vary from brownish-black to transparent depending on the nature of the source of the crude turpentine.
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; turpentineturpentine,
yellow to brown semifluid oleoresin exuded from the sapwood of pines, firs, and other conifers. It is made up of two principal components, an essential oil and a type of resin that is called rosin.
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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 ?
More than half the 11 billion lbs of vinyl resin produced annually in the U.S.
Polymer Powders, Polyurethane Dispersions, Powder Coating Additives, Preservatives, Printing Ink Dispersants S Vehicles, Printing Ink Extenders & Thickeners, Printing Ink Varnishes & Compounds, Reactive Diluents, Rheology Modifiers, Rosin Esters, Silicone Polyesters, Silicone Resins, Soft Touch Resins, Soybean, Stabilizers, Stearates, Styrene Resins, Surface Conditioners & Lubricants, Suspension Agents, Synthetic & Modified Oils, Terpenes, Thickening Agents, Ultraviolet Curing Resins, Urethane & Polyurethane Resins, Urethane Cross/inkers, Urethane Lacquers, UV Absorbers, VAE Resins, Varnishes, Vinyl Chloride & Vinylidene Chloride Polymer Emulsions, Vinyl Resins, Water Repellents--Silicone, Corrosion Inhibitors, Water Treatment Chemicals, Water-Thinned Resins, Waxes
According to the company, the increase in sales is primarily due to higher sales prices in vinyl resins and caustic soda, as well as higher volumes in all the aromatics products.
Stabilizers, Textur-izers, Thickening Agents, Ultraviolet Curing Resins, UV Absorbers, Vinyl Resins. Water Repellents-Silicone.
UV Absorbers, Vinyl Resins. Yellow and Orange Pigments
Univar announced that it will be marketing a comprehensive new range of solution vinyl resins under the Univar proprietary grade name.
He further added that high-impact rigid Geon vinyl resins can now be stamped out on conventional metal stamping machines, thereby opening the field to metalworking manufacturers and bringing plastics into direct competition with such established materials as wood, steel, glass, aluminum, and copper.
Specific technical information is provided with respect to the manufacture and characteristics of vinyl resins, additive raw materials, formulations, processing, testing and the myriad of end-use requirements.
Other Chemical Specialties, Other Pigments, Photocuring Materials/Photoinitiators, Pigment Dispersions (Aqueous), Pigment Dispersions (Non-Aqueous), Powder Coating Additives, Printing Ink Dispersants & Vehicles, Reactive Diluents, Red Pigments, Thickening Agents, Ultraviolet Curing Resins, UV Absorbers, Urethane Crosslinkers, Vinyl Resins, Yellow and Orange Pigments
Following the company's acquisition of Rohm and Haas, Dow Coating Materials will provide a wide range of chemistries and support across many different product lines, including core binder technologies, such as latex emulsions (acrylics, vinyl acrylics, styrene acrylics), epoxies, solution vinyl resins, and other polymer technologies.
Plastiflex aromatic and aliphatic secondary plasticizers for PVC are light-colored with good light stability and compatible with various vinyl resins. Applications include plastisols, calendering, molding, extrusion, wire coatings, and foams.