CN113651966A - Preparation method and application of comb-shaped benzene-maleic polymer water-based dispersant - Google Patents
Preparation method and application of comb-shaped benzene-maleic polymer water-based dispersant Download PDFInfo
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- CN113651966A CN113651966A CN202110837744.9A CN202110837744A CN113651966A CN 113651966 A CN113651966 A CN 113651966A CN 202110837744 A CN202110837744 A CN 202110837744A CN 113651966 A CN113651966 A CN 113651966A
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- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/024—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G
- C08G81/025—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G containing polyether sequences
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
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Abstract
The invention relates to a preparation method and application of a comb-shaped benzene-horse polymer water-based dispersant, which is biodegradable and does not contain alkylphenol; the comb-shaped benzene-horse polymer water-based dispersing agent prepared by the invention has a negative nonionic-comb structure, contains a plurality of pigment adsorption groups such as aromatic rings, tertiary carbon alkyl, carboxyl, hydroxyl, amino, polyether and the like in a molecular structure, has excellent wetting dispersibility, excellent chemical resistance, water resistance and aging resistance, improves luster and tinting strength, improves color content, excellent system compatibility, low foamability and excellent low-viscosity stability, prevents flooding and blooming, can be used for preparing high-solid low-viscosity pigment concentrated slurry dispersoids without a resin/resin system, such as organic red, yellow and purple pigments, inorganic pigments and matting powder, and is particularly suitable for dispersing carbon black and phthalocyanine pigments; can also be used for mixing and grinding organic pigment, anti-rust pigment and filler, and is suitable for aqueous systems such as aqueous color paste, aqueous industrial coating, aqueous ink, aqueous anti-corrosion and anti-rust primer and the like.
Description
Technical Field
The invention relates to an aqueous dispersant, in particular to a preparation method and application of a comb-shaped benzene-horse polymer aqueous dispersant, belonging to the technical field of polymer dispersants.
Background
In the production of paint and ink, pigment dispersion is a crucial link, a proper dispersant is selected to easily obtain a paint with uniform pigment dispersion and stable storage, although the traditional dispersant shows an effective dispersion stabilizing effect in an aqueous dispersion medium, the traditional dispersant is not firmly adsorbed on the surface of pigment particles and is easily desorbed from the surface of the particles to cause re-aggregation or precipitation of the dispersed particles, the long-term stability of the system is poor, and the properties of paint film appearance, hardness, aging resistance and the like are also adversely affected, especially the characteristic of strong pertinence of the dispersant is that the same dispersant cannot be widely applied to the dispersion of different organic pigments, so that the production cost of a user is increased.
The dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule, can uniformly disperse solid particles of inorganic and organic pigments which are difficult to dissolve in liquid, and simultaneously prevents the solid particles from settling and agglomerating. With the improvement of the requirements of people on health and environmental protection, the water-based environment-friendly paint becomes a new favorite in the field of architectural decoration, in the paint manufacturing process, the pigment is uniformly dispersed in the paint material in the form of tiny particles under the grinding and shearing force, and as the polarity of the surface of the pigment particles is low, but the surface tension of water is much greater than that of an organic solvent, some auxiliary agents are required to be added to reduce the surface tension of water and enhance the wetting effect on the pigment particles, so that the problem of dispersion stability is difficult to solve when preparing the water-based paint ink, and the application range of the water-based paint ink is narrowed; therefore, the surface of the pigment must be modified to cover the surface of the pigment particles with a dispersant, thereby improving the application properties of the pigment.
The molecular chain of the styrene-maleic anhydride copolymer (SMA) contains a hydrophobic styrene chain segment and a hydrophilic maleic anhydride chain segment, and a hydrolysate of the styrene-maleic anhydride copolymer (SMA) is a common high-molecular dispersant; meanwhile, the anhydride unit in the SMA molecular chain can be subjected to modification such as amidation, esterification and cationization, and the benzene ring unit can be subjected to modification such as sulfonation, so that the high-molecular dispersing agent with excellent performance is obtained. Such a polymeric dispersant has a good dispersion stabilizing effect on ultrafine solid particles (e.g., pigments, inorganic particles, etc.) having an extremely large surface area and a high specific surface energy, and is therefore called a styrene-maleic acid-based hyperdispersant. Styrene-maleic acid hyperdispersants are widely used in the fields of pigments, dyes, coatings, printing, paper making, construction, etc. at home and abroad.
Zhang.l et al synthesized a styrene-maleic anhydride copolymer using reversible addition-fragmentation chain transfer (RAFT) to control polymerization, investigated the dispersing ability of its hydrolyzed copolymer, and found that it has good dispersing properties for an organic phthalocyanine blue pigment. Xu Y, Liu j, etc. synthesized a hyperbranched styrene-maleic anhydride copolymer (BPSMA) and applied the product to carbon black dispersion in aqueous systems, the results showed that BPSMA had smaller particle size, narrower particle size distribution and higher stability to carbon black pigment dispersions than linear styrene-maleic anhydride copolymer (LPSMA).
Wangping et al prepared ultra-fine disperse red 60 by a grinding dispersion method and studied the influence of the synergistic effect of polystyrene-maleate PSMA and fatty alcohol-polyoxyethylene ether (AE) on the dispersion stability of disperse dyes. And the like, styrene, partially esterified maleic anhydride and maleic anhydride are used as monomers to synthesize the water-soluble polymer hyperdispersant, namely the partially esterified SMA, and the influence of various process parameters on the dispersibility of the copolymer is discussed. Zhoujiada and the like utilize 2, 3-epoxypropyltrimethyl ammonium chloride to carry out cationization modification to prepare the cationic surfactant of the partially esterified grafted quaternary ammonium salt, and researches show that the polymer has better dispersion stability to pigment yellow 14.
The forest Saint Sene et al prepared 3 comb-type amphiphilic polymers, poly (styrene-co-maleic anhydride) -g- (polyethylene glycol monomethyl ether) (A), poly (styrene-co-maleic anhydride) -g-C12H25OH) (B) and poly (styrene-co-maleic anhydride) -co- (polyethylene glycol monomethyl ether + C12H25OH) (C). When 3 comb-type amphiphilic polymers are used as a dispersing agent for carbon black, under the same conditions, the dispersing performance of 3 samples on the carbon black is sequentially B & gtC & gtA.
The invention prepares a structural SMA-g-MPEG + EP10+ NR3The comb-shaped benzene-horse polymer water-based dispersant has good dispersion effect on red, yellow and purple organic pigments.
Disclosure of Invention
The styrene-maleic acid hyperbranched structure has a viscosity reduction effect, anchoring groups in the molecular structure of the styrene-maleic acid hyperbranched structure, such as carboxyl, carboxylate, polyol, polyamine, polyether and the like, are tightly combined on the surface of the polar ultrafine particle through ionic bond, covalent bond, hydrogen bond, van der Waals force and other interactions, and the other part of nonpolar benzene rings are wound on the outer surface of the particle. The nonpolar benzene ring or polyether chain has good compatibility with a dispersion medium, presents an extended conformation, and forms a thick protective layer on the surface of the particle. Due to steric hindrance caused by occupied space and conformation, namely steric hindrance effect, when two particles adsorbed with hyper-dispersant molecules are mutually close, repulsive force can be generated between the particles to make the solid particles flick, so that flocculation is avoided.
EP-10, glycidyl versatate, a hyperbranched monomer containing ten hydrophobic groups of carbon atoms; EP-10 has excellent wetting dispersibility, excellent acid resistance, alkali resistance and outdoor aging resistance, improves the gloss, improves the pigment bearing property, has excellent system compatibility and low foamability, and can play a role in high solid content and low viscosity.
The invention aims to provide a comb-shaped benzene-horse polymer water-based dispersant and a preparation method thereof.
In order to solve the dispersion and stability performance of the aqueous dispersant in an aqueous system, the invention adopts styrene-maleic anhydride copolymer (SMA), and the molecular structural formula of the SMA is as follows:
wherein x and y in the molecular formula are 1: 1-2: 1; and z is 8-10.
Blocking with polyethylene glycol monomethyl ether MPEG and glycidyl versatate EP-10, and neutralizing with tertiary amine to make into water.
The comb-shaped benzene-horse polymer water-based dispersant disclosed by the invention has the structure of SMA-g-MPEG + EP10+ NR3(ii) a The molecular structural formula is as follows:
wherein x and y in the molecular formula are 1: 1-2: 1; z is 8-10;
r is
q＝22～28；
R1+R2Is 7C atoms; r3Is triethylamine or triethanolamine;
the comb-shaped benzene-horse polymer aqueous dispersant has the number average molecular weight of 20000-22000.
In order to solve the technical problems, the invention adopts the following technical scheme: the invention relates to a comb benzene-horse polymer water-based dispersant which comprises the following components in percentage by weight: 12.0-15.0% of styrene-maleic anhydride copolymer, 15.0-18.0% of polyethylene glycol monomethyl ether, 8.0-12.0% of tertiary carboxylic acid glycidyl ester, 0.2-0.5% of tertiary amine and 45.0-60.0% of deionized water.
Wherein the styrene-maleic anhydride copolymer has a number average molecular weight of 1000-2000.
The polyethylene glycol monomethyl ether has a number average molecular weight of 1000-1200.
The tertiary amine is one of triethylamine or triethanolamine.
The invention provides a preparation method of a comb-shaped benzene-horse polymer water-based dispersant, which comprises the following preparation steps:
weighing styrene-maleic anhydride copolymer, polyethylene glycol monomethyl ether and tert-carbonic acid glycidyl ester according to weight percentage, adding into a reaction kettle, heating to 120 ℃ to start melting, starting vacuum, and dehydrating for 1h under the condition that the vacuum degree is controlled to be 0.09 MPa; starting stirring after complete dissolution, continuously heating to 170-175 ℃, controlling the vacuum degree to be 0.07-0.08 MPa, reacting for 3-4 hours, sampling every 0.5 hour to detect the acid value, and stopping the reaction when the acid value reaches a specified value; cooling to 120 ℃, and closing N2Adding tertiary amine and deionized water under stirring, cooling to 60 ℃ when the pH value is 7.0-8.5, filtering and packaging to obtain the comb-shaped benzene-horse polymer aqueous dispersant.
The comb-shaped benzene-horse polymer aqueous dispersant is produced by adopting a one-pot method, has simple process, does not use hazardous raw materials, does not discharge three wastes, and belongs to a green production process.
The application of the comb-shaped benzene-horse polymer water-based dispersant JW prepared by the invention in water-based color paste comprises the following components in percentage by weight as shown in the following tables 1 and 2:
table 1: aqueous color paste composition
| Name (R) | Iron oxide red | Iron oxide yellow | Titanium white | PY74 | PY154 | Carbon black | PY93 |
| Deionized water | 13.9-14.9 | 19.2-20.2 | 17.9-18.9 | 29.3-30.3 | 34.2-35.2 | 41.2-42.2 | 39.2-40.2 |
| Propylene glycol | 5.0 | 5.0 | 5.0 | 6.0 | 6.0 | 6.0 | 6.0 |
| Bactericide | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Defoaming agent | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Wetting agent | 1.0 | 1.0 | 1.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| JW dispersant | 6.0-7.0 | 5.5-6.5 | 4.0-5.0 | 11.0-12.0 | 11.0-12.0 | 9.0-10.0 | 11.0-12.0 |
| Pigment (I) | 72.0 | 67.0 | 70.0 | 50.0 | 45.0 | 40.0 | 40.0 |
| pH regulator | 0.2 | 0.5 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Anti-settling agent | 0.5 | 0.4 | 0.5 | 0.1 | 0.2 | 0.2 | 0.2 |
Table 2: aqueous color paste composition
The comb-shaped benzene-horse polymer water-based dispersing agent prepared by the invention has a negative nonionic-multi-branched comb-shaped structure, the molecular structure contains a plurality of pigment adsorption groups such as aromatic rings, carboxyl groups, hydroxyl groups, amino groups, polyether and the like, the pigment particles are prevented from flocculating and settling by using steric hindrance, the viscosity reduction dispersibility is excellent, the tinting strength is improved, the flocculation, the flooding and the flowering are prevented, and the high-solid low-viscosity pigment concentrated slurry dispersoid without a resin/resin system, such as organic red, yellow and purple pigments, inorganic pigments and matting powder, can be prepared, and is particularly suitable for the dispersion of carbon black and phthalocyanine pigments; can also be used for mixing and dispersing organic pigment, anti-rust pigment and filler, and is suitable for aqueous systems such as aqueous color paste, aqueous industrial coating, aqueous ink, aqueous anti-corrosion and anti-rust primer and the like.
Detailed Description
The invention is further described with reference to the following examples for the preparation of aqueous comb-like benzene-maleic polymer dispersants. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.
Example 1
A comb-shaped benzene-horse polymer aqueous dispersant is prepared by the following steps:
weighing 125.0 parts of SMA1200, 152.0 parts of MPEG1000 and 85.0 parts of tert-carbonic acid glycidyl ester according to the weight percentage, adding into a reaction kettle, heating to 120 ℃ to start melting, starting vacuum, and dehydrating for 1h under the condition that the vacuum degree is controlled to be 0.09 MPa; starting stirring after complete dissolution, continuously heating to 170-175 ℃, controlling the vacuum degree to be 0.07-0.08 MPa, reacting for 4 hours, sampling every 0.5 hour to detect the acid value, and stopping the reaction when the acid value reaches a specified value; cooling to 120 ℃, and closing N2Adding 2.5 parts of triethylamine while stirring, adding 540.0 parts of deionized water, cooling to 60 ℃ when the pH value is 7.2-7.5, filtering and packaging to obtain the 41.2% solid comb-shaped benzene-horse polymer aqueous dispersant.
Example 2
A comb-shaped benzene-horse polymer aqueous dispersant is prepared by the following steps:
weighing 126.0 parts of SMA1000, 155.0 parts of MPEG1000 and 82.0 parts of tert-carbonic acid glycidyl ester according to the weight percentage, adding into a reaction kettle, heating to 120 ℃ to start melting, starting vacuum, and dehydrating for 1h under the condition that the vacuum degree is controlled to be 0.09 MPa; starting stirring after complete dissolution, continuously heating to 170-172 ℃, controlling the vacuum degree to be 0.07-0.08 MPa, reacting for 4 hours, sampling every 0.5 hour to detect the acid value, and stopping the reaction when the acid value reaches a specified value; cooling to 120 ℃, and closing N2Adding 2.6 parts of triethylamine while stirring, adding 550.0 parts of deionized water, cooling to 60 ℃ when the pH value is 7.0-7.2, filtering and packaging to obtain the comb-shaped benzene-horse polymer aqueous dispersant with the solid content of 40.5%.
Example 3
A comb-shaped benzene-horse polymer aqueous dispersant is prepared by the following steps:
weighing 125.0 parts of SMA1000, 150.0 parts of MPEG1200 and 90.0 parts of tert-carbonic acid glycidyl ester according to the weight percentage, adding into a reaction kettle, heating to 120 ℃ to start melting, starting vacuum, and dehydrating for 1h under the condition that the vacuum degree is controlled to be 0.09 MPa; starting stirring after complete dissolution, continuously heating to 170-172 ℃, controlling the vacuum degree to be 0.07-0.08 MPa, reacting for 4 hours, sampling every 0.5 hour to detect the acid value, and stopping the reaction when the acid value reaches a specified value; cooling to 120 ℃, and closing N2Adding 3.0 parts of triethanolamine while stirring, adding 550.0 parts of deionized water, cooling to 60 ℃ when the pH value is 7.0-7.2, filtering and packaging to obtain the comb-shaped benzene-horse polymer aqueous dispersant with the solid content of 40.2%.
Although the present invention has been described in detail and with reference to exemplary embodiments thereof, it will be apparent to one skilled in the art that various changes, modifications and variations can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The comb-shaped benzene-horse polymer water-based dispersant is characterized by being comb-shaped anionic and nonionic, and the components are SMA-g-MPEG + EP10+ NR3It is divided intoThe sub-formulae are shown below:
wherein x and y in the molecular formula are 1: 1-2: 1; z is 8-10;
r is
q＝22～28；
R1+R2Is an alkyl group of 7C atoms; r3Is triethylamine or triethanolamine;
the comb-shaped benzene-horse polymer aqueous dispersant has the number average molecular weight of 20000-22000.
2. The preparation method of the hyperbranched polymer aqueous dispersant of claim 1, which comprises the following steps:
weighing styrene-maleic anhydride copolymer, polyethylene glycol monomethyl ether and tert-carbonic acid glycidyl ester according to weight percentage, adding into a reaction kettle, heating to 120 ℃ to start melting, starting vacuum, and dehydrating for 1h under the condition that the vacuum degree is controlled to be 0.09 MPa; starting stirring after complete dissolution, continuously heating to 170-175 ℃, controlling the vacuum degree to be 0.07-0.08 MPa, reacting for 3-4 hours, sampling every 0.5 hour to detect the acid value, and stopping the reaction when the acid value reaches a specified value; cooling to 120 ℃, and closing N2Adding tertiary amine and deionized water under stirring, cooling to 60 ℃ when the pH value is 7.0-8.5, filtering and packaging to obtain the hyperbranched polymer aqueous dispersant;
the material comprises the following raw materials in percentage by weight:
3. the hyperbranched polymeric aqueous dispersant of claim 2, wherein the styrene-maleic anhydride copolymer has a number average molecular weight of 1000 to 2000; the molar ratio of the styrene to the maleic anhydride is 1: 1-2: 1.
4. The hyperbranched polymer aqueous dispersant of claim 2, wherein the polyethylene glycol monomethyl ether has a number average molecular weight of 1000 to 1200.
5. The hyperbranched polymeric aqueous dispersant of claims 1-2, wherein said tertiary amine is one of triethylamine or triethanolamine.
6. The application of the hyperbranched polymer aqueous dispersant of claim 2 in aqueous color paste, wherein the aqueous color paste comprises the following components in percentage by weight as shown in tables 1 and 2:
table 1: aqueous color paste composition
Table 2: aqueous color paste composition
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333221A (en) * | 2023-02-22 | 2023-06-27 | 万思得新材料科技(中山)有限公司 | Color pigment dispersion liquid, color photoresist and preparation method thereof |
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- 2021-07-23 CN CN202110837744.9A patent/CN113651966A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116333221A (en) * | 2023-02-22 | 2023-06-27 | 万思得新材料科技(中山)有限公司 | Color pigment dispersion liquid, color photoresist and preparation method thereof |
| CN116333221B (en) * | 2023-02-22 | 2023-11-03 | 万思得新材料科技(中山)有限公司 | Color pigment dispersion liquid, color photoresist and preparation method thereof |
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