WO2002008302A1 - Verfahren zur herstellung von salzarmen wässrigen lösungen von vinylamineinheiten enthaltenden polymerisaten - Google Patents
Verfahren zur herstellung von salzarmen wässrigen lösungen von vinylamineinheiten enthaltenden polymerisaten Download PDFInfo
- Publication number
- WO2002008302A1 WO2002008302A1 PCT/EP2001/008277 EP0108277W WO0208302A1 WO 2002008302 A1 WO2002008302 A1 WO 2002008302A1 EP 0108277 W EP0108277 W EP 0108277W WO 0208302 A1 WO0208302 A1 WO 0208302A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymers containing
- aqueous solutions
- solvent mixture
- solutions
- units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/12—Hydrolysis
Definitions
- the invention relates to a process for producing low-salt aqueous solutions of polymers containing vinylamine units from aqueous solutions of hydrolyzed polymers containing N-vinylformamide units by removing the neutral salts from these solutions.
- Polymers containing vinylamine units are prepared by hydrolysis of aqueous solutions of polymers containing N-vinylformamide units with acids or bases, cf. EP-B-0 071 050 and EP-B-0 2116 387.
- the resulting aqueous polymer solutions are usually neutralized and used for the intended purpose together with the neutral salts formed in the preparation, e.g. as a drainage, flocculation and retention agent or as a strengthening agent in the manufacture of paper.
- Aqueous solutions of polymers containing vinylamine units containing neutral salts are not stable in storage. The effectiveness of such polymer solutions, for example as a retention aid, decreases over time.
- neutral salts in polyvinylamines are undesirable in many cases.
- WO-A-97/25367 aqueous solutions of polymers containing vinylamine units, which can be obtained by hydrolysis of polymers containing N-vinylformamide units, subjected to ultrafiltration.
- JP-A-10/218936 it is known to treat polyvinylamine, which has been prepared by hydrolysis of an aqueous solution of poly-N-vinylformamide with sodium hydroxide solution, in an aqueous medium using dry ice in the cold.
- a polymer salt precipitates ,, 'which is isolated.
- This salt is a mixture of the carbamate and the carbonate of the polyvinylamine. It contains no inorganic salts and can easily be processed into an aqueous solution.
- N-vinylformamide polymers distill the resulting formic acid in the presence of alcohols as formic acid esters from the reaction mixture or, after the hydrolysis has ended, add an alcohol to the reaction mixture, esterify the formic acid and remove the esters from the reaction mixture by means of a distillation, cf. DE-A-17 20 737 and EP-B-0 758 344.
- the invention has for its object to provide a further process for the preparation of low-salt aqueous solutions of polymers containing vinylamine units from aqueous solutions of hydrolyzed polymers containing N-vinylformamide units.
- the object is inventively achieved by a process for preparing low-salt aqueous solutions of vinylamine units containing polymers from aqueous solutions of hydrolyzed N-vinylformamide polymers containing by removing the neutral salts from these solutions when aqueous solutions of hydrolyzed 'N-vinylformamide polymers containing with a solvent mixture
- the preparation of vinylamine units containing polymers by solvolysis of N-vinylformamide having polymers is known in part from the above-cited prior art and is also, for example, in US-A-5,085,787, US J ⁇ -4018826, EP-A-0 251 182 and EP-A-0 528 409.
- Polymers containing vinylamine units are said to be both partially and fully hydrolyzed homopolymers of N-vinyl formamide as well as partially and completely hydrolyzed copolymers of N-vinylformamide are understood.
- the degree of hydrolysis of the N-vinylformamide units in the homo- or copolymers can be, for example, 1 to 100 mol%.
- the copolymers may contain at least one comonomer in copolymerized form, for example vinyl esters such as vinyl acetate or vinyl propionate, acrylic acid or methacrylic acid esters such as acrylic acid methyl ester, acrylic acid ethyl ester, acrylic acid isopropyl ester, acrylic acid n-butyl ester, acrylic acid isobutyl ester, methacrylic acid methyl ester n-methyl acrylate , N-butyl methacrylic acid and / or isobutyl methacrylic acid, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, monoethylenically unsaturated acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, vinylsulfonic acid, acrylamido-2-methylpropylsulfonic acid , Vinylphosphonic acid and / or styrene sulfonic acid,
- Polyvinylamines are preferably used which are obtainable by hydrolysis of poly-N-vinylformamides with bases such as sodium hydroxide solution and have a degree of hydrolysis of 1 to 100, preferably up to mol%.
- the aqueous solutions of polymers containing vinylamine units prepared from polymers containing N-vinylformamide units by hydrolysis with sodium hydroxide solution contain sodium formate as neutral salt, which is removed according to the invention from these aqueous solutions.
- the molar mass of the polymers containing vinylamine units is, for example, 500 to 10 million and is preferably in the range from 1000 to 5 million, in particular from 5000 to 5 million.
- the molecular weight is determined by static
- the concentration of polymers containing vinylamine units in the aqueous solution, the neutral salt content of which is to be reduced or removed, is, for example, in the range from 1 to 30, preferably 10 to 25,% by weight.
- a solvent mixture of acetone and ethanol is preferably used.
- the particularly preferred range for the weight ratio of acetone to ethanol is, for example, 5: 1 to 3: 1.
- the aqueous polymer solutions are treated with the solvent mixture by combining the two solutions.
- the solvent mixture can be added to the aqueous polymer solution with stirring.
- a procedure is preferred in which an aqueous solution containing neutral salts of a polymer comprising vinylamine units is introduced into the solvent mixture.
- the mixture is preferably stirred.
- the aqueous polymer solution and the solvent mixture can be brought together at temperatures of, for example, 10 to 100 ° C., preferably 30 to 60 ° C.
- the two solutions can be quickly mixed together.
- one solution can also be metered into the other continuously or batchwise to the other solution within, for example, 30 minutes.
- the solution presented can have a different temperature than the solution which is added. So you can e.g.
- aqueous solution containing neutral salts of polymers containing vinylamine units heat an aqueous solution containing neutral salts of polymers containing vinylamine units to a temperature of 30 to 60 ° C. and meter the solvent mixture all at once, continuously or batchwise.
- the mixture can optionally be used for some time, e.g. Stir 1 to 30, preferably 1 to 10 minutes. It is then cooled to a temperature of 0 ° C or below. For example, it is cooled to a temperature of 0 to -30 ° C, preferably -5 to -20 ° C.
- the neutral salts separate out with crystallization. They are separated, e.g. filtered off or centrifuged. The content of hydrolyzed polymers containing vinylformamide groups in the salts thus separated is low.
- the solvents are distilled off from the mixture at atmospheric pressure or under reduced pressure. After removing the solvent mixture, the distillation is stopped. Low-salt aqueous solutions of polymers containing vinylamine units remain in the distillation apparatus. The content of neutral salts in the low-salt aqueous polymer solutions is, for example, 1 to 10%, preferably 2 to 5% by weight.
- the distilled off solvents can be used again in the method according to the invention.
- the procedure can be both batchwise 'or continuously. The process is preferred continuously carried out by reusing the solvent mixture recovered by distillation.
- an aqueous polyvinylamine solution and the solvent mixture are continuously fed to a cooler which is cooled with brine.
- the cooled mixture is then fed to a suitable filtering device, in which the neutral salts are continuously filtered off and discharged.
- the low-salt aqueous polyvinylamine solution is fed continuously into a distillation column in which the solvent mixture is recovered and used again.
- aqueous, low-salt polymer solutions containing vinylamine units thus prepared are used, for example, as process aids in the manufacture of paper and cardboard, in particular as retention aids, drainage agents and fixatives, as wet and dry strength agents for paper, as fixatives for dyes, as promoters for alkyldiketene sizing, used as a fixative for resin glues, as emulsifiers and thickeners for oil-in-water emulsions and dispersions, and as a component in superabsorbent polymers in combination with crosslinked polyacrylic acids.
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10036018.1 | 2000-07-25 | ||
| DE2000136018 DE10036018A1 (de) | 2000-07-25 | 2000-07-25 | Verfahren zur Herstellung von salzarmen wäßrigen Lösungen von Vinylamineinheiten enthaltenden Polymerisaten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002008302A1 true WO2002008302A1 (de) | 2002-01-31 |
Family
ID=7650036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2001/008277 Ceased WO2002008302A1 (de) | 2000-07-25 | 2001-07-18 | Verfahren zur herstellung von salzarmen wässrigen lösungen von vinylamineinheiten enthaltenden polymerisaten |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10036018A1 (de) |
| WO (1) | WO2002008302A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102036A1 (en) * | 2002-05-31 | 2003-12-11 | Mitsubishi Chemical Corporation | Amine-functional copolymer and process for producing the same |
| US8561870B2 (en) | 2008-02-13 | 2013-10-22 | Ethicon Endo-Surgery, Inc. | Surgical stapling instrument |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766565A (en) * | 1954-03-12 | 1957-01-23 | Vinyl Products Ltd | Improvements in or relating to the preparation of a purified polyvinyl alcohol |
| US3156667A (en) * | 1962-03-05 | 1964-11-10 | Shawinigan Resins Corp | Heat stabilization of polyvinyl alcohol with phosphoric acid |
| SU836013A1 (ru) * | 1979-04-13 | 1981-06-07 | Предприятие П/Я М-5927 | Способ получени термостабильныхгидРОКСилСОдЕРжАщиХ СОпОлиМЕРОВ |
| JPS5761005A (en) * | 1980-09-30 | 1982-04-13 | Kuraray Co Ltd | Polyvinyl alcohol resin powder having new preformance |
| JPH0559115A (ja) * | 1991-09-02 | 1993-03-09 | Kuraray Co Ltd | 高シンジオタクテイツクポリビニルアルコール系重合体の製造方法 |
| JPH05209059A (ja) * | 1992-01-30 | 1993-08-20 | Nippon Synthetic Chem Ind Co Ltd:The | エチレン−酢酸ビニル系共重合体ケン化物粉末及びその用途 |
| DE4411311A1 (de) * | 1994-03-31 | 1995-10-05 | Basf Ag | Verfahren zur Herstellung von lagerstabilen wäßrigen Lösungen von Vinylamin-Einheiten enthaltenden Polymerisaten |
-
2000
- 2000-07-25 DE DE2000136018 patent/DE10036018A1/de not_active Withdrawn
-
2001
- 2001-07-18 WO PCT/EP2001/008277 patent/WO2002008302A1/de not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB766565A (en) * | 1954-03-12 | 1957-01-23 | Vinyl Products Ltd | Improvements in or relating to the preparation of a purified polyvinyl alcohol |
| US3156667A (en) * | 1962-03-05 | 1964-11-10 | Shawinigan Resins Corp | Heat stabilization of polyvinyl alcohol with phosphoric acid |
| SU836013A1 (ru) * | 1979-04-13 | 1981-06-07 | Предприятие П/Я М-5927 | Способ получени термостабильныхгидРОКСилСОдЕРжАщиХ СОпОлиМЕРОВ |
| JPS5761005A (en) * | 1980-09-30 | 1982-04-13 | Kuraray Co Ltd | Polyvinyl alcohol resin powder having new preformance |
| JPH0559115A (ja) * | 1991-09-02 | 1993-03-09 | Kuraray Co Ltd | 高シンジオタクテイツクポリビニルアルコール系重合体の製造方法 |
| JPH05209059A (ja) * | 1992-01-30 | 1993-08-20 | Nippon Synthetic Chem Ind Co Ltd:The | エチレン−酢酸ビニル系共重合体ケン化物粉末及びその用途 |
| DE4411311A1 (de) * | 1994-03-31 | 1995-10-05 | Basf Ag | Verfahren zur Herstellung von lagerstabilen wäßrigen Lösungen von Vinylamin-Einheiten enthaltenden Polymerisaten |
Non-Patent Citations (4)
| Title |
|---|
| DATABASE WPI Section Ch Week 198216, Derwent World Patents Index; Class A14, AN 1982-32561E, XP002183824 * |
| DATABASE WPI Section Ch Week 198220, Derwent World Patents Index; Class A14, AN 1982-40654E, XP002183826 * |
| DATABASE WPI Section Ch Week 199315, Derwent World Patents Index; Class A14, AN 1993-121418, XP002183823 * |
| DATABASE WPI Section Ch Week 199338, Derwent World Patents Index; Class A18, AN 1993-297831, XP002183825 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102036A1 (en) * | 2002-05-31 | 2003-12-11 | Mitsubishi Chemical Corporation | Amine-functional copolymer and process for producing the same |
| US8561870B2 (en) | 2008-02-13 | 2013-10-22 | Ethicon Endo-Surgery, Inc. | Surgical stapling instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10036018A1 (de) | 2002-02-07 |
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