coumarone Chem.
(ˈkuːmərəʊn)
Also cumarone.
[ad. G. cumaron (Fittig & Ebert 1883, in Ann. Chem. Pharm. CCXVI. 168), f. coumarin + -one.]
a. A colourless liquid, C8H6O, which may be distilled from coal-tar or synthesized, and which is structurally a benzene ring fused to a furan ring; benzofuran; also, any of the derivatives of this compound.
| 1883 Jrnl. Chem. Soc. XLIV. 474 Coumarone is a colourless oil, heavier than water. 1910 Encycl. Brit. VII. 309/1 Coumarone, C8H6O,..is a colourless liquid which boils at 171– 172° C. and is readily volatile in steam, but is insoluble in water and in potash solution. 1957 E. H. Rodd Chem. Carbon Compounds IV. iii. 169 Coumarones are obtained from o-hydroxy-ω-halogenoacetophenones. 1963 F. M. Dean Naturally Occurring Oxygen Ring Compounds v. 135 The older name for benzofuran, coumarone, is nearly obsolete. |
b. coumarone resin, any of various thermoplastic resins produced by polymerization of coumarone, usually in mixtures with indene (so coumarone-indene resin), and used esp. in the rubber and varnish industries.
| 1900 Jrnl. Chem. Soc. LXXVIII. i. 656 Indene, and Coumarone Resins. 1935 C. Ellis Chem. Synth. Resins I. vii. 123 Cumarone resin is employed for a variety of purposes, particularly in the manufacture of varnishes, printing inks, waterproofing materials, rubber compositions, floor tiles and chewing gum. 1947 R. L. Wakeman Chem. Commercial Plastics xiii. 287 Patents relating to coumarone-indene resins. 1951 H. M. Langton Synthetic Resins (ed. 3) vii. 272 Coumarone resins are graded mainly by colour and melting point. 1966 J. A. Brydson Plastics Materials xiv. 284 Coumarone resins are used considerably in the paint and varnish industry. |