High density information record lubricants

Claim 1

In a high density information record adapted for use with a playback stylus to effect recovery of signals occupying a bandwidth of at least several megahertz when relative motion at a desired rate is established between said record and said stylus, said record comprising a disc of a conductive material containing an information track constituted by a surface relief pattern in said track to accommodate recovery of signals of said bandwidth upon establishment of relative motion at said rate, said record being coated with a methyl alkyl siloxane lubricant having the formula ##STR11## wherein R 1 and R 2 are alkyl groups of 4-20 carbon atoms, x is an integer of 2-4, y is an integer of 0-2 and wherein the sum of x and y is 4 or less, the improvement which comprises adding to said lubricant at least two dopants, at least one of which is selected from the following three classes having the formulas ##STR12## wherein R 3 is hydrogen, lower alkyl or hydroxyalkyl; R 4 is R 6 A wherein R 6 is an alkyl group of 1-5 carbon atoms and A is hydroxyl or carboxyl; R 5 can be R 7 A wherein R 7 is a straight chain alkyl group of 1-10 carbon atoms and A has the meaning given above or can be R 7 A-B-R 8 wherein R 7 and A have the above meaning, B is a linking group which can be --O-- or --C═C-- and R 8 is an alkyl group of 6-25 carbon atoms, or their corresponding ammonium salt of the formula ##STR13## wherein R 7 , R 8 , A and B have the above meanings and X can be an anion; ##STR14## wherein R 9 and R 11 can be methyl or ethyl and R 10 and R 12 are long chain alkyl groups of up to 20 carbon atoms; and ##STR15## wherein R 13 is an alkyl group of 10-20 carbon atoms and R 14 is an alkyl group of 1-5 carbon atoms wherein said second dopant is of a different dopant class.