Oil-soluble additives for lubricating oils
AssigneeRohm and Haas Company
InventorRavindranath Mukkamala
Life of this patent
Estimating the term…
Abstract
A compound of formula I: wherein W represents O, S—A2, or two groups, R3 and R4; bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond; c is a single or double bond, and d is a single bond, double bond, or two single bonds, provided that d is a single bond when c is a double bond, d is not a single bond when c is a single bond, and W is R3 and R4 when d is two single bonds; A1, A2, B and B2 are independently hydrogen, alkyl, alkenyl, aralkyl or one of the groups depicted in Scheme 1:
Claims13
A compound having the formula
- wherein W represents two groups, R3 and R4;
- bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond;
- c is a single bond, and d is two single bonds,
- A1, B1 and B2 are independently hydrogen,
- provided that B1 is absent when b is a double bond, B2 is absent when a is a double bond,
- R1, R2, R3 and R4 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- or R1 and R2, or R3 and R4, combine with the carbon atom to which they are attached to form an alkyl or alkenyl ring;
- Y is O or S;
- Z is O, S or NR9;
- m is 0 when bond e is a double bond and 1 when e is a single bond;
- n is 1 when bond f is a double bond and 2 when f is a single bond;
- R5 is C(Y)ZR7, hydrogen or C1-C4 alkyl;
- R6 is hydrogen or C1-C4 alkyl;
- R7, R8 and R9 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- provided that at least one of A1, B1 and B2 is present and is not hydrogen.
A composition comprising a lubricating oil and from 0.1% to 20% of a compound having the formula
- wherein W represents two groups, R3 and R4;
- bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond;
- c is a single bond, and d is two single bonds,
- A1, B1 and B2 are independently hydrogen,
- provided that B1 is absent when b is a double bond, B2 is absent when a is a double bond
- R1, R2, R3 and R4 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- or R1 and R2, or R3 and R4, combine with the carbon atom to which they are attached to form an alkyl or alkenyl ring;
- Y is O or S;
- Z is O, S or NR9;
- m is 0 when bond e is a double bond and 1 when e is a single bond;
- n is 1 when bond f is a double bond and 2 when f is a single bond;
- R5 is C(Y)ZR7, hydrogen or C1-C4 alkyl;
- R6 is hydrogen or C1-C4 alkyl;
- R7, R8 and R9 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- provided that at least one of A1, B1 and B2 is present and is not hydrogen.
A method of improving anti-wear and anti-corrosion characteristics of a lubricating oil by adding from 0.1% to 20% of a compound having the formula
- wherein W represents two groups, R3 and R4 ;
- bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond;
- c is a single bond, and d is two single bonds,
- A1, B1 and B2 are independently hydrogen,
- provided that B1 is absent when b is a double bond, B2 is absent when a is a double bond
- R1, R2, R3 and R4 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- or R1 and R2, or R3 and R4, combine with the carbon atom to which they are attached to form an alkyl or alkenyl ring;
- Y is O or S;
- Z is O, S or NR9;
- m is 0 when bond e is a double bond and 1 when e is a single bond;
- n is 1 when bond f is a double bond and 2 when f is a single bond;
- R5 is C(Y)ZR7, hydrogen or C1-C4 alkyl;
- R6 is hydrogen or C1-C4 alkyl;
- R7, R8 and R9 are independently hydrogen, alkyl, alkenyl, aryl or aralkyl;
- provided that at least one of A1, B1 and B2 is present and is not hydrogen.
Dependencies are inferred from the claim text.