US6403745B1
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Gradient copolymers, as well as a method for their preparation and their use
Assignee: Evonik Oil Additives GmbH
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Filing: 1999-11-30
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Granted: 2002-06-11
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Expires: 2019-11-30
Abstract
Abstract This invention concerns gradient copolymers, that are obtainable by polymerizing a mixture of olefinically unsaturated monomers that consist of a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R 1 means a linear or branched alkyl residue with 1 to 5 carbon atoms, R 2 and R 3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R 4 means a linear or branched alkyl residue with 6 to 15 carbon atoms, R 5 and R 6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 6 to 15 carbon atoms, c) 0 to 80% by weight of one or more ethylenically unsaturated ester compounds of formula (III) where R is hydrogen or methyl, R 7 means a linear or branched alkyl residue with 16 to 30 carbon atoms, R 8 and R 9 independently are hydrogen or a group of the formula —COOR′″ where R′″ means hydrogen or an alkyl group with 16 to 30 carbon atoms, d) 0 to 50 % by weight comonomer, where the indication of % by weight in each case refers to the total weight of the ethylenically unsaturated monomers, where the mixture of the ethylenically unsaturated monomers is varied during chain growth in order to obtain copolymers that have a gradient. The new copolymers are used as pour point depressants.
Inventors
- 👤 Markus Scherer
- 👤 Joseph Martin Bollinger
- 👤 Joan Souchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:27
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C10; C10L; C10L10/00; C10L10/14; C10L10/16; C08F220/22; C08F220/26; C08F220/28; C08F220/281; C08F220/283; C08F220/34; C08F220/38; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
258 words
Gradient copolymers obtained by polymerizing a mixture of olefinically unsaturated monomers that consists of a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R 1 means a linear or branched alkyl residue with 1 to 5 carbon atoms, R 2 and R 3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R 4 means a linear or branched alkyl residue with 6 to 15 carbon atoms, R 5 and R 6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 6 to 15 carbon atoms, c) 0 to 80% by weight of one or more ethylenically unsaturated ester compounds of formula (III) where R is hydrogen or methyl, R 7 means a linear or branched alkyl residue with 16 to 30 carbon atoms, R 8 and R 9 independently are hydrogen or a group of the formula —COOR′″ where R′″ means hydrogen or an alkyl group with 16 to 30 carbon atoms, d) 0 to 50% by weight comonomer, in each case with respect to the total weight of the ethylenically unsaturated monomers, where the mixture of the ethylenically unsaturated monomers is varied during chain growth in order to obtain copolymers that have a gradient.
Claim 2
Dependent Claim
258 words
Gradient copolymers obtained by polymerizing a mixture of olefinically unsaturated monomers that consists of a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R 1 means a linear or branched alkyl residue with 1 to 5 carbon atoms, R 2 and R 3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R 4 means a linear or branched alkyl residue with 6 to 15 carbon atoms, R 5 and R 6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 6 to 15 carbon atoms, c) 0 to 80% by weight of one or more ethylenically unsaturated ester compounds of formula (III) where R is hydrogen or methyl, R 7 means a linear or branched alkyl residue with 16 to 30 carbon atoms, R 8 and R 9 independently are hydrogen or a group of the formula —COOR′″ where R′″ means hydrogen or an alkyl group with 16 to 30 carbon atoms, d) 0 to 50% by weight comonomer, in each case with respect to the total weight of the ethylenically unsaturated monomers, where the mixture of the ethylenically unsaturated monomers is varied during chain growth in order to obtain copolymers that have a gradient.
Claim 3
Dependent Claim
18 words
Gradient copolymers as in claim 1 , wherein said gradient of the copolymer amounts to more than 5%.
Claim 4
Dependent Claim
16 words
Gradient copolymers as in claim 1 or 2 , wherein said copolymer has a linear gradient.
Claim 5
Dependent Claim
24 words
Gradient copolymers as in claim 1 , wherein that the weight average molecular weight of the copolymer lies in the range of 10,000-500,000 g/mol.
Claim 6
Dependent Claim
23 words
Gradient copolymers as in claim 1 , wherein the polydispersity (M w /M n ) lies in the range of 1 to 12.
Claim 7
Dependent Claim
27 words
A concentrate as lubricant oil additive, wherein said concentrate contains 15 to 85% by weight of one or more gradient copolymers in accordance with claim 1 .
Claim 8
Dependent Claim
11 words
A concentrate as in claim 6 , further comprising organic solvents.
Claim 9
Dependent Claim
11 words
A lubricant oil containing gradient copolymers as in claim 1 .
Claim 10
Dependent Claim
41 words
A concentrate as in claim 6 , or lubricant oil as in claim 8 , further comprising an element selected from the group consisting of viscosity index improvers, antioxidants, corrosion inhibitors, detergents, dispersants, EP additives, foam inhibitors, friction reducers and/or deemulsifiers.
Claim 11
Dependent Claim
11 words
A diesel biofuel containing gradient polymers as in claim 1 .
Claim 12
Dependent Claim
26 words
A diesel biofuel as in claim 10 , wherein said gradient copolymer is present in an amount in the range of 0.01 to 10% by weight.
Claim 13
Dependent Claim
25 words
A method of improving the pour point depression and flow of a lubricant oil comprising adding the copolymer of claim 1 to a lubricant oil.
Claim 14
Dependent Claim
17 words
The copolymer of claim 5 , wherein said gradient copolymer has a polydispersity of 1.05 to 2.
Claim 15
Dependent Claim
26 words
The concentrate of claim 7 wherein said organic solvent is selected from the group consisting of a mineral oil, a synthetic oil and a mixture thereof.
Claim 16
Dependent Claim
22 words
The diesel biofuel of claim 11 , wherein said gradient copolymer is present in an amount of 0.01 to 2% by weight.
Claim 17
Dependent Claim
25 words
A lubricant oil as in claim 8 wherein said gradient copolymer is present in an amount in the range of 0.01 to 10% by weight.
Claim 18
Dependent Claim
22 words
The lubricant oil of claim 16 , wherein said gradient copolymer is present in an amount of 0.01 to 2% by weight.
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