US4668410A
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Aqueous functional fluids based on polymers
Assignee: Hoechst AG
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Filing: 1986-04-24
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Granted: 1987-05-26
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Expires: 2006-04-24
Abstract
Abstract Aqueous functional fluids, in particular hydraulic and metal-working fluids, containing a copolymer which is prepared by emulsion or solution copolymerization, initiated by free radicals, of unsaturated, copolymerizable monomers, the copolymers being built up from: (a) 1-60% by weight of ethylenically unsaturated carboxylic acids, (b) 0.5-30% by weight of a surface-active unsaturated ester, (c) 30-85% by weight of methacrylic acid esters or acrylic acid esters of aliphatic (C 1 -C 18 )-alcohols, (d) 0-40% by weight of other ethylenically unsaturated comonomers, (e) 0-3% by weight of polyethylenically unsaturated compounds, and (f) 0-5% by weight of molecular weight regulators, and, if appropriate, the free acid groups of the copolymers subsequently having been partly or completely neutralized by addition of bases, and converted into water-soluble or colloidally water-dispersible copolymer salts.
Inventors
- 👤 Raimund Haas
- 👤 Dieter Engel
- 👤 Rainer Helwerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:10
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C10; C10M; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M147/00; C10M147/04; C10M149/00; C10M149/02; C10M149/08; C10M151/00; C10M151/02; C10M173/00; C10M173/02; C10M2201/00; C10M2201/02; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/107; C10M2213/00; C10M2213/04; C10M2213/06; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2217/00; C10M2217/02; C10M2217/026; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/08; C10N2040/20; C10N2050/00; C10N2050/01; Y; Y10; Y10S; Y10S526/00; Y10S526/932
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
An aqueous functional fluid which contains a copolymer prepared by emulsion or solution copolymerization, initiated by free radicals, of unsaturated, copolymerizable monomers, the copolymer being built up from the components comprising: (a) 1-60% by weight of ethylenically unsaturated (C 3 -C 5 )-monocarboxylic acids, ethylenically unsaturated (C 4 -C 6 )-dicarboxylic acids or monoesters thereof with aliphatic (C 1 -C 8 )-alcohols, or mixtures of these monomers, (b) 0.5 to 30% by weight of a surface-active, unsaturated ester of the general formula I ##STR4## in which n denotes a number from 2 to 100, R 1 and R 2 denote hydrogen or methyl, and R denotes anliphatic C 12 -C 20 radical, which can be linear or branched R denotes a perfluorinated or partially fluorinated (C 1 -C 16 )-alkyl radical, (c) 30-85% by weight of methacrylic acid esters or acrylic acid esters of aliphatic (C 1 -C 18 )-alcohols or a mixture of these esters, (d) 0-40% by weight of other ethylenically unsaturated comonomers, (e) 0-3% by weight of polyethylenically unsaturated compounds, and (f) 0-5% by weight of molecular weight regulators.
Claim 2
Dependent Claim
182 words
An aqueous functional fluid which contains a copolymer prepared by emulsion or solution copolymerization, initiated by free radicals, of unsaturated, copolymerizable monomers, the copolymer being built up from the components comprising: (a) 1-60% by weight of ethylenically unsaturated (C 3 -C 5 )-monocarboxylic acids, ethylenically unsaturated (C 4 -C 6 )-dicarboxylic acids or monoesters thereof with aliphatic (C 1 -C 8 )-alcohols, or mixtures of these monomers, (b) 0.5 to 30% by weight of a surface-active, unsaturated ester of the general formula I ##STR4## in which n denotes a number from 2 to 100, R 1 and R 2 denote hydrogen or methyl, and R denotes anliphatic C 12 -C 20 radical, which can be linear or branched R denotes a perfluorinated or partially fluorinated (C 1 -C 16 )-alkyl radical, (c) 30-85% by weight of methacrylic acid esters or acrylic acid esters of aliphatic (C 1 -C 18 )-alcohols or a mixture of these esters, (d) 0-40% by weight of other ethylenically unsaturated comonomers, (e) 0-3% by weight of polyethylenically unsaturated compounds, and (f) 0-5% by weight of molecular weight regulators.
Claim 3
Dependent Claim
33 words
An aqueous functional fluid as claimed in claim 1, which contains a copolymer containing 0.5 to 30% by weight of a crotonic acid ester of the formula CH.sub.3 --CH═CH.sub.2 COO--(CH.sub.2 CH.sub.2 O).sub.n --R.
Claim 4
Dependent Claim
24 words
An aqueous functional fluid as claimed in claim 1, which is a hydraulic fluid and contains 1 to 40% by weight of the copolymers.
Claim 5
Dependent Claim
24 words
An aqueous functional fluid as claimed in claim 1, which is a metal-working fluid and contains 0.3 to 20% by weight of the copolymers.
Claim 6
Dependent Claim
19 words
An aqueous functional fluid as claimed in claim 1 wherein R denotes an aliphatic (C 16 -C 18 )-radical.
Claim 7
Dependent Claim
175 words
An aqueous functional fluid as claimed in claim 1 which contains a copolymer prepared by said emulsion or solution copolymerization, followed by partial or complete neutralization of the free acid groups of the copolymer by addition of a base, said copolymer comprising: (a) 5-45% by weight of methacrylic acid, acrylic acid, crotonic acid, maleic acid, monoalkyl maleates or mixtures thereof, (b) 0.5 to 30% by weight of a surface-active, unsaturated ester of said general formula I in which R 1 denotes methyl and R 2 denotes hydrogen; (c) 30-85% by weight of a said methacrylic acid ester or acrylic acid ester or a mixture of these esters (d) 0-40% by weight of vinyl esters, vinyl-aromatics, ethylenically unsaturated nitriles, esters of ethylenically unsaturated monocarboxylic and dicarboxylic acids, where these have not already been listed above under said component (c), ethylenically unsaturated sulfonic acid derivatives, or mixtures thereof, (e) 0-3% by weight of divinylbenzene, diallyl phthalate and butanedioldiacrylate or dimethacrylate or mixtures thereof, (f) 0-5% by weight of dodecylmercaptan, tetrakis-mercaptoacetylpentaerythritol, carbon tetrachloride or bromotrichloromethane, or mixtures thereof.
Claim 8
Dependent Claim
19 words
An aqueous functional fluid as claimed in claim 6 wherein R denotes an aliphatic (C 16 -C 18 )-radical.
References Cited (Backward Citations)
US4469611A
Cited
US4462920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |