| 释义 |
natural resin
Thesaurus| Noun | 1. | natural resin - a plant exudatesandarach, sandarac - a brittle and faintly aromatic translucent resin used in varnishesguaiacum - medicinal resin from the lignum vitae treestorax - a vanilla-scented resin from various trees of the genus Styraxscammony - resin from the root of Convolvulus scammoniaacaroid resin, accaroid resin, accroides, accroides gum, accroides resin, gum accroides - an alcohol-soluble resin from Australian trees; used in varnishes and in manufacturing papergum anime, anime - any of various resins or oleoresinsasafetida, asafoetida - the brownish gum resin of various plants; has strong taste and odor; formerly used as an antispasmodiccamphor - a resin obtained from the camphor tree; used in making celluloid and linimentcannabin, cannabis resin - a resin obtained from the hemp plant; thought to be the active narcotic agent in marijuanaresin, rosin - any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple moleculesamber - a hard yellowish to brownish translucent fossil resin; used for jewelrycopal - a brittle aromatic resin used in varnishesdamar, dammar, dammar resin, gum dammar - any of various hard resins from trees of the family Dipterocarpaceae and of the genus Agathis; especially the amboyna pinecolophony - translucent brittle substance produced from pine oleoresin; used especially in varnishes and inks and on the bows of stringed instrumentsmastic - an aromatic exudate from the mastic tree; used chiefly in varnishesoleoresin - a naturally occurring mixture of a resin and an essential oil; obtained from certain plantsgum resin - a mixture of resin and gumplant product - a product made from plant materialwood tar - any tar obtained by the destructive distillation of wood |
Natural Resin
Resin, Natural any of the solid substances possessing various degrees of transparency and color (from colorless to dark brown) contained in resiniferous plants. Natural resins are obtained from fluids (soft resins) that are secreted from the surface of plants either spontaneously or as a result of piercing (tapping). Some natural resins, which are called fossil or semi-fossil resins, are obtained from deposits in the ground. Natural resins melt upon heating and are insoluble in water. They dissolve or swell in organic solvents and are capable of forming films. The major components of natural resins are resin acids, monohydroxy and polyhydroxy alcohols (resinols), esters of resin acids and resin alcohols or monohydroxy phenols (tannols), and chemically inert compounds, which are apparently heterocyclic compounds. Essential oils and water may also be present; the exact chemical composition of most natural resins has not been established. Natural resins with the greatest commercial importance include rosin, copal, shellac, amber, mastic, sandarac, dammar, and acaroid resin. Until the 1930’s, natural resins were widely used in the production of oil varnishes (copal, amber), spirit varnishes (shellac, “soft” copals, sandarac), and resin varnishes (dammar, mastic), as well as in the production of adhesives, phonograph records, linoleum, embalming agents, sealing wax, and compositions for fumigating candles. The sharp drop in demand for natural resins in recent years has been caused by the introduction of synthetic products. In the modern paint and varnish industry, rosin and the products of its modification, shellac, and amber (wastes from the production of ornaments) are the most frequently used natural resins. Natural resins are also used in the production of soaps, luminophors, polishes, sizes, cosmetic preparations, plasters, and chewing gum. M. M. GOL’DBERG natural resinA solid, thermoplastic organic substance which occurs in nature; is flammable and a nonconductor of electricity.natural resin
Words related to natural resinnoun a plant exudateRelated Words- sandarach
- sandarac
- guaiacum
- storax
- scammony
- acaroid resin
- accaroid resin
- accroides
- accroides gum
- accroides resin
- gum accroides
- gum anime
- anime
- asafetida
- asafoetida
- camphor
- cannabin
- cannabis resin
- resin
- rosin
- amber
- copal
- damar
- dammar
- dammar resin
- gum dammar
- colophony
- mastic
- oleoresin
- gum resin
- plant product
- wood tar
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