Patent EP0335656A1 successfully refreshed from Google Patents.
Patent US6235813B1 successfully refreshed from Google Patents.
US6235813B1
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Dispersants for preparing aqueous pigment pastes
Assignee: Evonik Goldschmidt GmbH
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Filing: 1999-08-09
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Granted: 2001-05-22
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Expires: 2019-08-09
Abstract
Abstract The invention relates to block-polymethacrylate-block-polyalkylene oxide copolymers with terminal carboxylic acids, of the general formula Iand to their use as a dispersing additive in aqueous pigment preparations and as a compatibilizer in SMC or BMC formulations.
Inventors
- 👤 Petra Brandt
- 👤 Eberhard Esselborn
- 👤 Hans-Leo Karminski
- 👤 Arno Knebelkamp
- 👤 Christian Psiorz
- 👤 Stefan Silber
- 👤 Ellen Wallhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:59
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/001; C08; C08G; C08G81/00; C08G81/02; C08G81/024; C08G81/025; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/009
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
112 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid, of the general formula I where R 1 is the radical of a conventional chain regulator or initiator which is free from active hydrogen atoms, R 2 is identical or different and is an alkyl radical, substituted aryl radical, perfluoroalkyl radical or dialkylamino radical, R 3 is identical or different and is an alkyl radical or aryl radical, R 4 is an organic radical having at least one carboxylic acid or carboxylate function, X is oxygen or NH, a is from 4 to 20, b is from 20 to 100, and c is from 0 to 20, the ratio b/c is ≧ about 4.
Claim 2
Dependent Claim
112 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid, of the general formula I where R 1 is the radical of a conventional chain regulator or initiator which is free from active hydrogen atoms, R 2 is identical or different and is an alkyl radical, substituted aryl radical, perfluoroalkyl radical or dialkylamino radical, R 3 is identical or different and is an alkyl radical or aryl radical, R 4 is an organic radical having at least one carboxylic acid or carboxylate function, X is oxygen or NH, a is from 4 to 20, b is from 20 to 100, and c is from 0 to 20, the ratio b/c is ≧ about 4.
Claim 3
Dependent Claim
27 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein R 2 is an alkyl radical of 1 to 22 carbon atoms.
Claim 4
Dependent Claim
27 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein R 3 is an alkyl radical of 1 to 4 carbon atoms.
Claim 5
Dependent Claim
18 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein X is oxygen.
Claim 6
Dependent Claim
18 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein c is 0.
Claim 7
Dependent Claim
21 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein a is from 6 to 15.
Claim 8
Dependent Claim
30 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein R 4 is an aliphatic radical having at least one carboxylic acid or carboxylate function.
Claim 9
Dependent Claim
23 words
A block-polymethacrylate-block-polyalkyene oxide copolymer with terminal carboxylic acid as claimed in claim 7 , wherein R 4 is —C(O)CH 2 CH 2 —COOH.
Claim 10
Dependent Claim
124 words
A block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , wherein R 1 is the radical of a conventional chain regulator or initiator which is free from active hydrogen atoms, R 2 is identical or different and is an alkyl radical of 1 to 22 carbon atoms, substituted aryl radical, perfluoroalkyl radical or dialkylamino radical, R 3 is identical or different and is an alkyl radical of 1 to 4 carbon atoms or a phenyl radical, R 4 is an organic radical having at least one carboxylic acid or carboxylate function, X is oxygen or NH, a is from 4 to 20, b is from 20 to 100, and c is from 0 to 20, the ratio b/c is ≧4.
Claim 11
Dependent Claim
16 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where R 1 is a n-dodecylmercapto, tert-dodecylmercapto, octadecylmercapto or a tetradecylmercapto radical.
Claim 12
Dependent Claim
16 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where R 1 is a n-dodecylmercapto, tert-dodecylmercapto, octadecylmercapto or a tetradecylmercapto radical.
Claim 13
Dependent Claim
34 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where R 4 is selected from the group consisting of where Z is hydrogen, an alkali metal, or an ammonium radical which is optionally substituted by alkyl or benyl group.
Claim 14
Dependent Claim
34 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where R 4 is selected from the group consisting of where Z is hydrogen, an alkali metal, or an ammonium radical which is optionally substituted by alkyl or benyl group.
Claim 15
Dependent Claim
37 words
A block-polymethacrylate-block-polyalkylene oxide copolymer as claimed in claim 11 , where Z is —NH(CH 3 ) 3 , —NH(C 2 H 5 ) 3 , and —NH(CH 2 —C 6 H 5 )(CH 3 ) 2 .
Claim 16
Dependent Claim
9 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where the block copolymer is:
Claim 17
Dependent Claim
9 words
A block-polymethacrylate-block-polyalkylene oxide copolymer where the block copolymer is:
Claim 18
Dependent Claim
32 words
An aqueous pigment preparation comprising at least one organic or inorganic pigment and a dispersant comprising at least one block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 .
Claim 19
Dependent Claim
32 words
An aqueous pigment preparation as claimed in claim 14 , wherein the amount of block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid is from about 1 to 100% by weight, based upon pigment.
Claim 20
Dependent Claim
86 words
A one-pot process for preparing a block-polymethacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 , which comprises transesterifying a polymethacrylate, obtained by free-radical polymerization with α, ω-difunctional polyethers, in the presence of a chain regulator and a Lewis acid transesterification catalyst at a temperature from about 70 to about 150° C., optionally in the presence of a solvent, and reacting the product thus formed with an anhydride and heating the reaction mixture at a temperature from about 70 to about 150° C.
Claim 21
Dependent Claim
24 words
A method of dispersing solids in a liquid media which comprises adding a block-polymethacrylate-block-polyalkylene oxide copolymer as claimed in claim 1 to said media.
Claim 22
Independent Claim
21 words
A method for increasing the compatibility of chemically different polymer types which comprises adding a block-polymethacrylate-block-polyalkylene oxide copolymer to said polymers.
Claim 23
Independent Claim
21 words
A method for increasing the compatibility of chemically different polymer types which comprises adding a block-polymethacrylate-block-polyalkylene oxide copolymer to said polymers.
Claim 24
Dependent Claim
31 words
In a method for preparing SMC or BMC formulations, the improvement which comprises adding to said formulation a block-polymetacrylate-block-polyalkylene oxide copolymer with terminal carboxylic acid as claimed in claim 1 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-21 | 2012-11-20 | 2013-05-22 | $7700.00 | Window Closed / Lapsed |