| 摘要 |
<p>A liquid hydrocarbon composition suitable for reclaiming rubber consists predominantly of a mixture of alkyl benzenes and a mixture of alkyl naphthalenes and has an aniline point of less than 15 DEG C. The alkyl benzene mixture may have a boiling range between 130 DEG and 300 DEG C. and the alkyl naphthalene mixture may have a boiling range between 175 DEG and 300 DEG C. Examples are concerned with mixing 30 or 20 parts by weight of a mixture containing butyl benzenes and tri- and tetra-methyl benzenes with 70 or 80 parts by weight of a mixture containing alpha-and-beta-monomethyl naphthalenes, 1,2, 1,6, 1,7 and 2,6 dimethylnaphthalenes, trinaphthalenes, acenaphthalenes, fluorene and naphthalene.ALSO:A liquid hydrocarbon composition for use in reclaiming vulcanized natural rubber and SBR consists of a mixture of alkyl benzenes and a mixture of alkyl naphthalenes and has an aniline point of less than 15 DEG C. According to an example, old tyres from which the metal beads have been removed are comminuted, the comminuted scrap is digested by the composition at 200 DEG C. for 3-10 hr. to destroy tyre fabric and soften the rubber, the digested material is washed with water and then dried, the dried material is milled, pigments and further softeners being incorporated at this stage if necessary, is refined, and is finally sheeted.</p> |
