US4670516A
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Copolymers based on maleic anhydride and α, β-unsaturated compounds a process for their preparation and their use as paraffin inhibitors
Assignee: Bayer AG
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Filing: 1985-02-11
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Granted: 1987-06-02
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Expires: 2005-02-11
Abstract
Abstract The new copolymers based on maleic anhydride and α,β-unsaturated compounds contain, as bivalent structural units, A: 20 to 95 mole % of the structural element ##STR1## B: 0 to 40 mole % of the structural element ##STR2## C: and 0 to 40 mole % of the structural element ##STR3## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, alkyl, optionally substituted aryl or the ester group ##STR4## in which R 4 represents alkyl with 1 to 20 carbon atoms, R 3 denotes an alkyl, cycloalkyl or optionally substituted aryl radical with 1 to 20 carbon atoms and X and Y are identical or different and represent the group --O--R.sup.5 in which R 5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, or X and Y represent the group --NHR.sup.3 in which R 3 has the abovementioned meaning, at least one of the radicals X and Y representing the group --O--R 5 , and at least one of the radicals in the radicals X and Y containing at least 18 carbon atoms. The new copolymers can be prepared by reacting alternating copolymers of maleic anhydride and α,β-unsaturated compounds with monoalcohols and monoamines. They can be used as paraffin inhibitors.
Inventors
- 👤 Gunter Sackmann
- 👤 Jan Mazanek
- 👤 Wolfgang Oberkirch
- 👤 Herbert Bartl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1966; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F8/44; C10L1/22; C10L1/234; C10L1/236; C10L1/2364
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
252 words
A copolymer based on maleic anhydride and a α, β-unsaturated compound, comprising the following bivalent structural units, A. 20 to 95 mole percent of the structural element ##STR19## B. 0 to 40 mole percent of the structural element ##STR20## C. and 2 to 40 mole percent of the structural element ##STR21## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, straight chain or branched alkyl with 1 to 12 carbon atoms, unsubstituted or substituted aryl having 6 to 12 carbon atoms and wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen, and C 1 -to-C 6 alkoxy or the ester group ##STR22## in which R 4 represents alkyl with 1 to 20 carbon atoms, R 3 denotes an alkyl with 1 to 20 carbon atoms, cycloalkyl with up to 20 carbon atoms, or unsubstituted or substituted aryl radical with up to 20 carbon atoms wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen and C 1 -to-C 6 alkoxy, and X and Y are identical or different and represent the group --O--R.sup.5 in which R 5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, or X and Y represent the group --NHR.sup.3 in which R 3 has the above-mentioned meaning, at least one of the radicals in the radicals X and Y containing at least 18 carbon atoms.
Claim 2
Dependent Claim
252 words
A copolymer based on maleic anhydride and a α, β-unsaturated compound, comprising the following bivalent structural units, A. 20 to 95 mole percent of the structural element ##STR19## B. 0 to 40 mole percent of the structural element ##STR20## C. and 2 to 40 mole percent of the structural element ##STR21## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, straight chain or branched alkyl with 1 to 12 carbon atoms, unsubstituted or substituted aryl having 6 to 12 carbon atoms and wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen, and C 1 -to-C 6 alkoxy or the ester group ##STR22## in which R 4 represents alkyl with 1 to 20 carbon atoms, R 3 denotes an alkyl with 1 to 20 carbon atoms, cycloalkyl with up to 20 carbon atoms, or unsubstituted or substituted aryl radical with up to 20 carbon atoms wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen and C 1 -to-C 6 alkoxy, and X and Y are identical or different and represent the group --O--R.sup.5 in which R 5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, or X and Y represent the group --NHR.sup.3 in which R 3 has the above-mentioned meaning, at least one of the radicals in the radicals X and Y containing at least 18 carbon atoms.
Claim 3
Dependent Claim
145 words
Copolymers according to claim 1, characterized in that they contain, as bivalent structural units, A. 60 to 95 mole percent of the structural element ##STR23## B. 0 to 25 mole percent of the structural element ##STR24## C. and 2 to 20 mole percent of the structural element ##STR25## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, alkyl with 1 to 6 carbon atoms, optionally substituted phenyl or the ester group ##STR26## in which R 4 represents alkyl with 1 to 18 carbon atoms, R 3 denotes an alkyl radical with 1 to 20 carbon atoms, cyclopentyl or cyclohexyl, and X and Y are identical or different and represent the group --OR 5 in which R 5 denotes hydrogen or alkyl with 1 to 40 carbon atoms.
Claim 4
Dependent Claim
24 words
A copolymer according to claim 2 wherein X is --OR 5 and, R 5 is an alkyl group of 1 to 40 carbon atoms.
Claim 5
Dependent Claim
16 words
A copolymer according to claim 3 wherein Y is --OR 5 and R 5 is hydrogen.
Claim 6
Dependent Claim
29 words
A copolymer according to claim 3 wherein Y is a moiety of the formula --OR 5 and R 5 is an alkyl group of 1 to 40 carbon atoms.
Claim 7
Dependent Claim
11 words
A copolymer according to claim 3 wherein Y is a cation.
Claim 8
Dependent Claim
16 words
A copolymer according to claim 2 wherein X and Y represent the group --NHR 3 .
Claim 9
Dependent Claim
259 words
A composition comprising a mineral oil and a copolymer based on maleic anhydride and α, β-unsaturated compound having bivalent structural units as follows: A. 20 to 95 mole percent of the structural element ##STR27## B. 0 to 40 mole percent of the structural element ##STR28## C. and 2 to 40 mole percent of the structural element ##STR29## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, straight chain or branched alkyl with 1 to 12 carbon atoms, unsubstituted or substituted aryl having 6 to 12 carbon atoms and wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen, and C 1 -to-C 6 alkoxy or the ester group ##STR30## in which R 4 represents alkyl with 1 to 20 carbon atoms, R 3 denotes an alkyl with 1 to 20 carbon atoms, cycloalkyl with up to 20 carbon atoms, or unsubstituted or substituted aryl radical with up to 20 carbon atoms wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen and C 1 -to-C 6 alkoxy, and X and Y are identical or different and represent the group --O--R.sup.5 in which R 5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, or X and Y represent the group --NHR.sup.3 in which R 3 has the above-mentioned meaning, and at least one of the radicals in the radicals X and Y containining at least 18 carbon atoms.
Claim 10
Dependent Claim
259 words
A composition comprising a mineral oil and a copolymer based on maleic anhydride and α, β-unsaturated compound having bivalent structural units as follows: A. 20 to 95 mole percent of the structural element ##STR27## B. 0 to 40 mole percent of the structural element ##STR28## C. and 2 to 40 mole percent of the structural element ##STR29## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, straight chain or branched alkyl with 1 to 12 carbon atoms, unsubstituted or substituted aryl having 6 to 12 carbon atoms and wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen, and C 1 -to-C 6 alkoxy or the ester group ##STR30## in which R 4 represents alkyl with 1 to 20 carbon atoms, R 3 denotes an alkyl with 1 to 20 carbon atoms, cycloalkyl with up to 20 carbon atoms, or unsubstituted or substituted aryl radical with up to 20 carbon atoms wherein the substituents of the aryl are selected from C 1 -to-C 6 alkyl, halogen and C 1 -to-C 6 alkoxy, and X and Y are identical or different and represent the group --O--R.sup.5 in which R 5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, or X and Y represent the group --NHR.sup.3 in which R 3 has the above-mentioned meaning, and at least one of the radicals in the radicals X and Y containining at least 18 carbon atoms.
Claim 11
Dependent Claim
29 words
A composition according to claim 8 wherein said copolymer is present in an amount of 10 to 10,000 parts per million based on the weight of said mineral oil.
Claim 12
Dependent Claim
16 words
A composition according to claim 9 wherein said mineral oil is a paraffin containing mineral oil.
Claim 13
Dependent Claim
147 words
A composition according to claim 9 wherein said copolymer is one having bivalent structural units as follows: A. 60 to 95 mole percent of the structural element ##STR31## E. 0 to 25 mole percent of the structural element ##STR32## C. and 2 to 20 mole percent of the structural element ##STR33## the sum of the mole percents of (A), (B), and (C) being 100, and wherein R 1 and R 2 are identical or different and denote hydrogen, alkyl with 1 to 6 carbon atoms, optionally substituted phenyl or the ester group ##STR34## in which R 4 represents alkyl with 1 to 18 carbon atoms, R 3 denotes an alkyl radical with 1 to 20 carbon atoms, cyclopentyl or cyclohexyl, and X and Y are identical or different and represent the group --OR.sup.5 in which R 5 denotes hydrogen or alkyl with 1 to 40 carbon atoms.
Claim 14
Dependent Claim
29 words
A composition according to claim 11 wherein X is a moiety of the formula --OR 5 and R 5 is an alkyl group of 1 to 40 carbon atoms.
Claim 15
Dependent Claim
22 words
A composition according to claim 9 wherein R 5 is a straight or branched alkyl hydrocarbon of 14 to 40 carbon atoms.
Claim 16
Dependent Claim
21 words
A composition according to claim 13 wherein Y is a moiety of the formula --OR 5 and R 5 is hydrogen.
Claim 17
Dependent Claim
29 words
A composition according to claim 13 wherein Y is a moiety of the formula --OR 5 and R 5 is an alkyl group of 1 to 40 carbon atoms.
Claim 18
Dependent Claim
11 words
A composition according to claim 13 wherein Y is a cation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |