Patent GB-996481-A (GB)
Title: Improvements in or relating to organic compounds
Inventor: ELLIOTT JOHN SCOTCHFORD
IPC: C10M135/36
Filed: 1960-12-19
Abstract: The invention comprises a derivative of a polyether having the general formula <FORM:0996481/C2/1> or <FORM:0996481/C2/2> where R is a branched chain alkylene radical having 3 or 4 carbon atoms, R1 and R2 are H, alkyl, cycloalkyl, aryl, aralkyl, or alkaryl groups, X is chlorine or bromine, Z is the residue of an organic acid containing at least one acidic divalent sulphur atom and is attached to R by a sulphur atom, l is an integer, m is an integer of at least 2 and is at least half l, n is zero or an integer, and p is an integer of from 1 to 4.  The group Z may be for example <FORM:0996481/C2/3> , <FORM:0996481/C2/4> or <FORM:0996481/C2/5> where R3 and R4 are hydrocarbon radicals which may be substituted by halogen, Y is oxygen or sulphur and q is zero or one.  Preferred radicals are xanthyl, dithiocarbamyl, dithiophosphate and benzthiazolythio.  The novel compounds may be made by reacting a halogenated polyether of the general formula <FORM:0996481/C2/6> where R, R1, R2, X and n are as defined above and a=(m+l), with a salt of Z with a metal selected from group I of the Periodic Table or with a sulphide or di- or polysulphide of such a metal.  The value of m+l will normally be from 3 to 70, n is preferably zero or not greater than m+l; R1 and R2 are preferably hydrogen or alkyl radicals which may contain up to 20 carbon atoms.  Detailed examples are given. Specification 916,096 is referred to.ALSO:The invention comprises a derivative of a polyether having the general formula <FORM:0996481/C3/1> or <FORM:0996481/C3/2> where R is a branched chain alkylene radical having 3 or 4 carbon atoms, R1 and R2 are H, alkyl, cycloalkyl, aryl, aralkyl, or alkaryl groups, X is chlorine or bromine, Z is the residue of an organic acid containing at least one acidic divalent sulphur atom and is attached to R by a sulphur atom, l is an integer, m is an integer of at least 2 and is at least half l, n is zero or an integer, and p is an integer of from 1 to 4. The group Z may be for example -SR3, <FORM:0996481/C3/3> or <FORM:0996481/C3/4> where R3 and R4 are hydrocarbon radicals which may be substituted by halogen, Y is oxygen or sulphur and q is zero or 1. Preferred radicals are xanthyl, dithiocarbamyl, dithiophosphate and benzthiazolylthio.  The novel compounds may be made by reacting a halogenated polyether of the general formula <FORM:0996481/C3/5> where R, R1, R2, X and n are as defined above, with a salt of Z with a metal selected from group I of the Periodic Table or with a sulphide or dior polysulphide of such a metal.  The value of a=m+l will normally be from 3 to 70, preferably between 7 and 40.  Detailed examples are given.  Specification 916,096 is referred to.ALSO:A lubricating composition comprises a major proportion of a mineral or synthetic lubricating oil and from 0.1 to 20% by weight on the weight of the composition of one or more derivatives of polyethers having the general formula <FORM:0996481/C4-C5/1> where R is a branched chain alkylene radical having 3 or 4 carbon atoms, R1 and R2 are H, alkyl, cycloalkyl, aryl, aralkyl, or alkaryl groups, X is chlorine or bromine; Z is the residue of an organic acid containing at least one acidic divalent sulphur atom and is attached to R by a sulphur atom, l is an integer, m is an integer of at least 2 and is at least half l, n is zero or an integer, and p is an integer of from 1 to 4. Preferred compounds are those which contain xanthate, thiocarbamate, disulphide and thiophosphate groups.