Polymeric multifunctional lubricant additives
AssigneeCiba Specialty Chemicals Corporation
InventorsHugo Camenzind, Paul Dubs
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Abstract
Described are products suitable as lubricant and fuel additives which are obtainable by reacting a polyunsaturated polymer, for example polybutadiene, polyisoprene, ring-opening polymerised polycyclooctenamer or polynorbomene, with at least one enophilic compound of the groups of the dihydrocarbyidithiophosphoric acids, dihydrocarbylmonothiophosphoric acids, dihydrocarbylphosphoric acids or mercaptans.
Claims7
A composition comprising a lubricant and a product obtainable by reacting a polyunsaturated polymer selected from the group consisting of polybutadiene, polyisoprene, ring opening polymerised polycyclooctenamer and polynorbornene with a least one compound of the formula:
- R.sup.3 --SH (II),
- wherein
- R.sup.3 is C.sub.1 -C.sub.22 alkyl which is unsubstituted or substituted by OH or/and COOH, or is C.sub.2 -C.sub.22 alkyl which is interrupted by --O--, --S--, --NR.sup.4 --, --C(.dbd.O)--, --C(.dbd.O)--O--, --O--C(.dbd.O)-- or --C(.dbd.O)--NR.sup.4 --;
- and R.sup.4 is H or C.sub.1 -C.sub.18 alkyl.
A concentrate which comprises an oleophilic solvent and at least one product obtainable by reacting a polyunsaturated polymer selected from the group consisting of polybutadiene, polyisoprene, ring opening polymerised polycyclooctenamer and polynorbornene with a least one compound of the formula:
- R.sup.3 --SH (II),
- wherein
- R.sup.3 is C.sub.1 -C.sub.22 alkyl which is unsubstituted or substituted by OH or/and COOH, or is C.sub.2 -C.sub.22 alkyl which is interrupted by --O--, --S--, --NR.sup.4 --, --C(.dbd.O)--, --C(.dbd.O)--O--, --O--C(.dbd.O)-- or --C(.dbd.O)--NR.sup.4 --;
- and
- R.sup.4 is H or C.sub.1 -C.sub.18 alkyl.
A process for enhancing the performance properties of lubricants, which comprises adding at least one product obtainable by reacting a polyunsaturated polymer selected from the group consisting of polybutadiene, polyisoprene, ring opening polymerised polycyclooctenamer and polynorbornene with a least one compound of the formula:
- R.sup.3 --SH (II),
- wherein
- R.sup.3 is C.sub.1 -C.sub.22 alkyl which is unsubstituted or substituted by OH or/and COOH, or is C.sub.2 -C.sub.22 alkyl which is interrupted by --O--, --S--, --NR.sup.4 --, --C(.dbd.O)--, --C(.dbd.O)--O--, --O--C(.dbd.O)-- or --C(.dbd.O)--NR.sup.4 --;
- and
- R.sup.4 is H or C.sub.1 -C.sub.18 alkyl.
Dependencies are inferred from the claim text.