Claims
- 1. Comb polymers comprising an olefin copolymer macromonomer of formula I: ##STR13## wherein R' is hydrogen or methyl,
- R.sub.1 is a linear, branched or cyclic C.sub.2 -C.sub.8 alkyl group or a C.sub.6-C.sub.10 aryl group,
- [A] is a segment formed by the 1,4-addition of butadiene optionally substituted with a C1-C6 alkyl group,
- [A'] is a segment formed by the vinyl addition of butadiene optionally substituted with a C1-C6 alkyl group, and
- n+m is an integer of from 10 to 3,000, copolymerized with alkyl(meth)acrylic ester monomers of formula II ##STR14## wherein R' is hydrogen or methyl, and
- R.sub.2 is an alkyl group with 1 to 26 carbon atoms.
- 2. Comb polymers as claimed in claim 1, wherein in addition to the alkyl(meth)acrylic ester monomers of formula II, monomers of formula III ##STR15## wherein R"' is hydrogen or methyl and Bs is a heterocyclic 5- or 6-member ring or a residue ##STR16## wherein Z is oxygen or --NR4, Q is an optionally alkylated hydrocarbon bridge with a total of 2 to 50 carbon atoms which may be interrupted by ether linkages, R.sub.5 is --OR.sub.6 or --NR.sub.7 R.sub.8, wherein R.sub.6 is hydrogen or an alkyl residue with 1 to 24 carbon atoms or an alkyl-substituted aryl residue with C1-C18-alkyl substituents, and wherein R.sub.7 and R.sub.8 each are an alkyl residue with 1 to 6 carbon atoms or together form, with the nitrogen atom and optionally other hetero-atoms, a heterocyclic 5- or 6-member ring, and wherein R.sub.4 is hydrogen or an alkyl residue with 1 to 6 carbon atoms, are also copolymerized with said olefin copolymer macromonomers in amounts from 0.5 to 25% by weight based on the total weight of all monomers.
- 3. Comb polymers as claimed in claim 1, wherein said olefin copolymer macromonomer has the formula I-A: ##STR17## wherein R is hydrogen or methyl,
- n' is an integer of from 0 to 3,000, and
- m' is an integer of from 0 to 3,000,
- with the condition that n'+m' equal at least 10, and m' .gtoreq.n'.
- 4. Comb polymers as claimed in claim 2, wherein said olefin copolymer macromonomer has the formula I-A: ##STR18## wherein R is hydrogen or methyl,
- n' is an integer of from 0 to 3,000, and
- m' is an integer of from 0 to 3,000,
- with the condition that n'+m' equal at least 10, and m' .gtoreq.n'.
- 5. Macromonomers of formula I-A ##STR19## wherein R is hydrogen or methyl,
- n' is an integer of from 0 to 1,500,
- m' is a non-zero integer greater than or equal to n, and
- n'+m' is an integer of at least 10.
- 6. An oil composition comprising oil and the comb polymer of claim 1.
- 7. An oil composition comprising oil and the comb polymer of claim 2.
Priority Claims (1)
Number |
Date |
Country |
Kind |
43 12 715.0 |
Apr 1993 |
DEX |
|
Parent Case Info
This application is a Continuation of application Ser. No. 08/227,344, filed on Apr. 14, 1994, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0431706 |
Jun 1991 |
EPX |
1053529 |
Jan 1967 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
227344 |
Apr 1994 |
|