Emery Industries, Inc.

Unilever Patent Holdings B.v.

Robert P Roggeveen

Adrien G Hinze

Abraham J Meulenberg

Hans M Brand

The invention provides a diester of the formula CH.sub.3 (CH.sub.2).sub.5 CH(OCOR.sup.1)(CH.sub.2).sub.10 COOR.sup.2, in which R.sup.1 is a saturated, branched chain hydrocarbon radical having 15 to 21 carbon atoms and R.sup.2 is a saturated, branched chain hydrocarbon radical having 8 to 22 carbon atoms. Preferably R.sup.1 is a methyl branched chain radical and contains 17 carbon atoms and statistically between 0.5 and 1.0 methyl side-chain per molecule, whereas R.sup.2 contains 18 to 22 carbon atoms with a C.sub.1 -C.sub.8, preferably C.sub.1 side-chain. The invention also provides a wax composition comprising a diester defined above optionally together with a hydrocarbon oil (C.sub.16 -C.sub.32 and saturated), a C.sub.12 -C.sub.22 optionally branched chain fatty acid and a monoester derived from a C.sub.18 to C.sub.22 fatty acid and a C.sub.12 to C.sub.22 alcohol. Furthermore the invention provides cosmetic preparations containing a wax composition as defined above.

Diesters and their use in waxes

By the incorporation of small amounts of specific polyamides into polyalkenes, such as polypropylene and polyethylene, it is possible to significantly improve the dyeing properties, including color intensity, color homogeneity and color fastness, of the polyalkene. Polyamides useful for this purpose are derived from mixed dicarboxylic acids, diamine and triamine containing two primary and one tertiary amine groups.

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Gouda, Netherlands

Robert P Roggeveen