| 单词 | microcrystalline wax |
| 释义 | > as lemmasmicrocrystalline wax microcrystalline wax n. a type of wax made of a mixture of hydrocarbons of higher molecular weight than those in paraffin waxes, and with a melting point of up to 90°C, which is obtained from the residual lubricating fraction of crude oil and is used in making waxed paper, adhesives, and polishes. ΘΚΠ the world > matter > chemistry > organic chemistry > organic chemicals used in industry > [noun] > others phenylenediamine1860 resorcin1866 furfuryl alcohol1873 chinosol1896 microcrystalline wax1943 piperonyl butoxide1945 1943 Jrnl. Amer. Pharmaceut. Assoc. (Sci. ed.) 32 111/2 A series of ‘Petro-waxes’, one of which melts at about 160°F. It is a white microcrystalline wax that is available in quantity. 1957 J. H. Van der Have & C. G. Verver Petroleum xi. 339 As its name implies, ‘micro-crystalline wax’ has a very fine crystal structure; it is a flexible and often somewhat sticky product; it has a high molecular weight (550–600) and a melting point within the same range as ceresin. 1972 Oxf. Univ. Gaz. 102 Suppl. No. 3. 10 They [sc. metal objects] are boiled to remove chlorides and after drying in an infra-red cupboard are impregnated with microcrystalline wax. 1992 Pract. Householder Nov. 25/2 Chips and bruises will be hard to hide, and ‘sugary’ dead white patches will not always respond to the recommended treatment of microcrystalline wax. < as lemmas |
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