GB738589A - Improved waxes and compositions containing them - Google Patents

Abstract

Wax compositions comprise a mixture of a wax and a polymeric hydrocarbon-substituted organo-silicon compound which contains aliphatic radicals having at least 14 carbon atoms, which may contain ether linkages and which are bound to silicon through an -O- or -OCO-bridge. The compounds may be hydrocarbon-substituted organo-silicon compounds, e.g. silicone derivatives, in which have been introduced the residues of higher fatty alcohols or higher fatty acids. The organo-silicon compounds may be prepared by heating a siloxane oil containing alkyl, aryl or aralkyl radicals, silicon-bonded hydrogen or alkoxy or acyloxy groups with a higher alcohol or a higher fatty acid. In examples, an alkyl-siloxane oil containing one SiH group for every two silicon atoms and a methyl-siloxane oil having every eleventh silicon atom bound to a hydrogen atom are heated at 150-250 DEG C. with cetyl alcohol, octadecyl alcohol or a polyethylene oxide containing hydroxyl groups. A catalyst or substance of alkaline or acid reaction may be present, e.g. a sodium alcoholate, zinc chloride or an ansolvo acid. In further examples, an alkyl-silicone oil containing the group -SiOC2H5 and another containing the group -SiOCOCH3 are reacted with cetyl alcohol or octadecyl alcohol. Other organo-silicon compounds may be used, such as silmethylenes or silphenylenes or polysilanes, containing residues of higher alcohols or higher acids.ALSO:Silanes containing the residues of aliphatic alcohols or acids having at least 14 carbon atoms may be prepared by reacting an alkoxysilane or a silane containing a silicon-bonded hydrogen atom with the appropriate alcohol or acid. In an example, cetyl alcohol is refluxed with trimethylbutoxysilane to interchange the butoxy and cetyloxy groups.ALSO:Wax compositions comprise a mixture of a wax and a monomeric or polymeric hydrocarbon-substituted organo-silicon compound which contains aliphatic radicals having at least 14 carbon atoms, which may contain ether linkages and which are bound to silicon through an -O- or -OCO-bridge. The compounds may be hydrocarbon-substituted organo-silicon compounds, e.g. silicone derivatives, in which have been introduced the residues of higher fatty alcohols or higher fatty acids. The waxes specified comprise paraffin wax, ceresin wax, carnauba, candellila, montan and brown wax. The organo-silicon compounds may be prepared by heating a siloxane oil containing alkyl, aryl or aralkyl radicals with a higher alcohol or a higher fatty acid. Hydrogen is evolved and SiH groups are converted into SiOR1 or SiOCOR1 groups, in which R1 represents the residue of the higher alcohol or higher acid. In examples, an alkyl-siloxane oil containing one SiH-group for every two silicon atoms and a methyl-siloxane oil having every eleventh silicon atom bound to a hydrogen atom are reacted with cetyl alcohol, octadecyl alcohol or a polyethylene oxide containing hydroxyl groups. A catalyst or substance of alkaline or acid reaction may be present, e.g. a sodium alcoholate, zinc chloride or an ansolvo acid. Temperatures of 150-250 DEG C. are exemplified. The organo-silicon compounds may also be prepared from silicones containing lower alkoxy groups by reetherification with higher alcohols, or from silicones containing lower acyloxy groups by reaction with higher fatty alcohols, or from alkoxy-silicones by reaction with higher fatty acids. In examples, an alkyl-silicone oil containing the group -SiOC2H5 and another containing the group p -SiOCOCH3 are reacted with cetyl alcohol or octadecyl alcohol. Other organo silicon compounds may be used, such as silmethylenes or silphenylenes or polysilanes, containing residues of higher alcohols or higher acids. The wax compositions may also contain modifying additions such as resins, fatty oils, fatty acids or emulsifying agents. The compositions may be used alone or with other materials as polishes or coating compositions.