CN105295502B - Water-based paint dispersant - Google Patents
Water-based paint dispersant Download PDFInfo
- Publication number
- CN105295502B CN105295502B CN201510773263.0A CN201510773263A CN105295502B CN 105295502 B CN105295502 B CN 105295502B CN 201510773263 A CN201510773263 A CN 201510773263A CN 105295502 B CN105295502 B CN 105295502B
- Authority
- CN
- China
- Prior art keywords
- parts
- initiator
- organic solvent
- dispersing
- minutes
- 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.)
- Active
Links
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses a water-based paint dispersant, which is prepared from acrylic acid, methyl methacrylate, white carbon black, glycol, an organic solvent, n-amyl alcohol, malonic acid, an initiator, sodium sulfite and a neutralizer; the dispersing agent can reduce the surface tension of the water-based paint, enhance the wetting effect on pigment particles, ensure that the pigment particles are stably dispersed in a liquid phase and can be quickly and firmly combined with surface groups of the paint, so that the pigment particles are stably suspended in an aqueous solvent, the pigment is well dispersed, the optimal dispersing effect is achieved, and the dispersing effect and the dispersing speed are improved by adding the modified white carbon black; in the preparation process of the dispersant, the molecular weight of a product and the distribution of products are changed by changing the conventional one-time addition of the initiator into the multiple addition of the initiator, so that the prepared dispersant not only has good dispersing performance, but also has good capability of resisting the change of environmental temperature.
Description
Technical Field
The invention relates to the field of chemicals, in particular to a water-based paint dispersing agent.
Background
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. The requirements of people on health and environmental protection are improved, and the water-based environment-friendly coating becomes a new favorite in the field of architectural decoration. However, the surface tension of water is much greater than that of organic solvents, and some additives are needed to reduce the surface tension of water, enhance the wetting effect on pigment particles and stably disperse the pigment particles in a liquid phase. However, many dispersants produced in the existing market have insignificant dispersing effect and low efficiency.
Disclosure of Invention
The invention aims to provide a water-based paint dispersing agent.
The invention is realized by the following technical scheme:
a water paint dispersing agent is prepared from (by weight parts) acrylic acid 15 parts, methyl methacrylate 15 parts, white carbon black 2 parts, ethylene glycol 10 parts, organic solvent 60 parts, n-amyl alcohol 1 part, malonic acid 3 parts, initiator 2 parts, sodium sulfite 4 parts, and neutralizer 4 parts; the preparation method comprises the following steps:
1) adding an organic solvent into a reaction kettle, heating to 65-70 ℃, carrying out constant temperature treatment for 1-1.5 hours, adding acrylic acid and methyl methacrylate, adding an initiator under the pressure of 6-10Mpa and at the temperature of 95-100 ℃, and reacting for 8-9 hours;
2) introducing nitrogen into n-pentanol, malonic acid and white carbon black at the temperature of 55-60 ℃ and the pressure of 15-18MPa to react for 40-45 minutes;
3) mixing the raw materials obtained in the steps 1) and 2), heating to 60 ℃, adding ethylene glycol, adding sodium sulfite when the temperature rises to 85 ℃, stopping heating when the temperature rises to 105 ℃, reacting for 1-2 hours, quickly cooling to 35-40 ℃, and taking out the materials;
4) grinding the material taken out in the step 3) in a colloid mill for 1 hour, and then putting the ground material in a stirring cylinder for stirring for 1-1.5 minutes;
5) adding a neutralizing agent into the materials in the step 4), removing the organic solvent, stirring for 30 minutes, sealing for 1 hour, and homogenizing in a homogenizer for 45 minutes.
Further, the organic solvent is acetone.
Further, the initiator is ammonium persulfate.
Further, the neutralizing agent is sodium hydroxide.
Further, the initiator is added at a rate of 0.5 parts by weight per 1 hour in the step 1).
Compared with the prior art, the invention has the beneficial effects that:
the dispersing agent can reduce the surface tension of the water-based paint, enhance the wetting effect on pigment particles, ensure that the pigment particles are stably dispersed in a liquid phase and can be quickly and firmly combined with surface groups of the paint, so that the pigment particles are stably suspended in an aqueous solvent, the pigment is well dispersed, the optimal dispersing effect is achieved, and the dispersing effect and the dispersing speed are improved by adding the modified white carbon black; in the preparation process of the dispersant, the molecular weight of a product and the distribution of products are changed by changing the conventional one-time addition of the initiator into the multiple addition of the initiator, so that the prepared dispersant not only has good dispersing performance, but also has good capability of resisting the change of environmental temperature.
Detailed Description
A water paint dispersing agent is prepared from (by weight parts) acrylic acid 15 parts, methyl methacrylate 15 parts, white carbon black 2 parts, ethylene glycol 10 parts, organic solvent 60 parts, n-amyl alcohol 1 part, malonic acid 3 parts, initiator 2 parts, sodium sulfite 4 parts, and neutralizer 4 parts; the preparation method comprises the following steps:
1) adding an organic solvent into a reaction kettle, heating to 65-70 ℃, carrying out constant temperature treatment for 1-1.5 hours, adding acrylic acid and methyl methacrylate, adding an initiator under the pressure of 6-10Mpa and at the temperature of 95-100 ℃, and reacting for 8-9 hours;
2) introducing nitrogen into n-pentanol, malonic acid and white carbon black at the temperature of 55-60 ℃ and the pressure of 15-18MPa to react for 40-45 minutes;
3) mixing the raw materials obtained in the steps 1) and 2), heating to 60 ℃, adding ethylene glycol, adding sodium sulfite when the temperature rises to 85 ℃, stopping heating when the temperature rises to 105 ℃, reacting for 1-2 hours, quickly cooling to 35-40 ℃, and taking out the materials;
4) grinding the material taken out in the step 3) in a colloid mill for 1 hour, and then putting the ground material in a stirring cylinder for stirring for 1-1.5 minutes;
5) adding a neutralizing agent into the materials in the step 4), removing the organic solvent, stirring for 30 minutes, sealing for 1 hour, and homogenizing in a homogenizer for 45 minutes.
Further, the organic solvent is acetone.
Further, the initiator is ammonium persulfate.
Further, the neutralizing agent is sodium hydroxide.
Further, the initiator is added at a rate of 0.5 parts by weight per 1 hour in the step 1).
When the pH is approximately equal to 9.0, the dispersing effect of the dispersing agent is best.
The coating prepared by the dispersant has the viscosity of 25 mPa.s at 30 ℃, and is excellent in viscosity, micro dispersion phase, dispersity and settling time when stored for 60 days at room temperature.
Claims (1)
1. The preparation method of the water-based paint dispersing agent is characterized by comprising the following components, by weight, 15 parts of acrylic acid, 15 parts of methyl methacrylate, 2 parts of white carbon black, 10 parts of ethylene glycol, 60 parts of an organic solvent, 1 part of n-amyl alcohol, 3 parts of malonic acid, 2 parts of an initiator, 4 parts of sodium sulfite and 4 parts of a neutralizing agent; the preparation method comprises the following steps:
1) adding an organic solvent into a reaction kettle, heating to 65-70 ℃, carrying out constant temperature treatment for 1-1.5 hours, adding acrylic acid and methyl methacrylate, adding an initiator under the pressure of 6-10MPa and at the temperature of 95-100 ℃, and reacting for 8-9 hours;
2) introducing nitrogen into n-pentanol, malonic acid and white carbon black at the temperature of 55-60 ℃ and the pressure of 15-18MPa to react for 40-45 minutes;
3) mixing the raw materials obtained in the steps 1) and 2), heating to 60 ℃, adding ethylene glycol, adding sodium sulfite when the temperature rises to 85 ℃, stopping heating when the temperature rises to 105 ℃, reacting for 1-2 hours, quickly cooling to 35-40 ℃, and taking out the materials;
4) grinding the material taken out in the step 3) in a colloid mill for 1 hour, and then putting the ground material in a stirring cylinder for stirring for 1-1.5 minutes;
5) adding a neutralizing agent into the material in the step 4), removing the organic solvent, stirring for 30 minutes, sealing for 1 hour, and homogenizing in a homogenizer for 45 minutes;
the organic solvent is acetone;
the initiator is ammonium persulfate;
the neutralizing agent is sodium hydroxide;
the initiator is added at a rate of 0.5 parts by weight per 1 hour in the step 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510773263.0A CN105295502B (en) | 2015-11-13 | 2015-11-13 | Water-based paint dispersant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510773263.0A CN105295502B (en) | 2015-11-13 | 2015-11-13 | Water-based paint dispersant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105295502A CN105295502A (en) | 2016-02-03 |
| CN105295502B true CN105295502B (en) | 2021-03-02 |
Family
ID=55193370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510773263.0A Active CN105295502B (en) | 2015-11-13 | 2015-11-13 | Water-based paint dispersant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105295502B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916480A (en) * | 2017-01-24 | 2017-07-04 | 安徽华晟涂料有限公司 | A kind of water paint dispersant |
| CN114134733A (en) * | 2021-12-30 | 2022-03-04 | 江苏德旺数码科技有限公司 | Water-based dye ink and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306022A (en) * | 2003-03-25 | 2004-11-04 | San Nopco Ltd | Dispersion agent for light calcium carbonate |
| CN101469148A (en) * | 2007-12-29 | 2009-07-01 | 西北师范大学 | Fluorine-containing polymer dispersant for water paint |
| CN104974587A (en) * | 2015-06-05 | 2015-10-14 | 武汉金弘扬化工科技有限公司 | Gemini-type nonionic high-molecular dispersing agent for water-based system pigment, preparation method and application thereof, and water-based paint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7834072B2 (en) * | 2007-06-07 | 2010-11-16 | Xerox Corporation | Non-aqueous compositions containing nanosized particles of monoazo laked pigment |
-
2015
- 2015-11-13 CN CN201510773263.0A patent/CN105295502B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306022A (en) * | 2003-03-25 | 2004-11-04 | San Nopco Ltd | Dispersion agent for light calcium carbonate |
| CN101469148A (en) * | 2007-12-29 | 2009-07-01 | 西北师范大学 | Fluorine-containing polymer dispersant for water paint |
| CN104974587A (en) * | 2015-06-05 | 2015-10-14 | 武汉金弘扬化工科技有限公司 | Gemini-type nonionic high-molecular dispersing agent for water-based system pigment, preparation method and application thereof, and water-based paint |
Non-Patent Citations (2)
| Title |
|---|
| 丙烯酸与丙烯酸甲酯共聚型分散剂;马立志;<中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑>;20040315;20页表2-1和第24页第19行-26行 * |
| 正辛醇改性白炭黑的表面工艺;辛高峰等;《武汉工程大学学报》;20110930;第16-19页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105295502A (en) | 2016-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104356935B (en) | Waterborne organic silicon coating and preparation method thereof | |
| CN103130943A (en) | Preparation method of water-borne acrylic resin emulsion for wood paint | |
| CN104631207A (en) | Waterproof coating for water-based paperboards and preparation method thereof | |
| CN103436120A (en) | Water-based alkyd resin and modified acrylic emulsion metal paint and preparation method thereof | |
| CN105295597A (en) | Water-borne automobile polyurethane varnish and preparation method thereof | |
| CN105295502B (en) | Water-based paint dispersant | |
| CN103254706A (en) | Water-based release agent and preparation method thereof | |
| CN106675366A (en) | Water-based double-ingredient environment-friendly middle coating primer and preparation method thereof | |
| WO2018041129A1 (en) | Epoxy emulsion and preparation method therefor | |
| CN103540217A (en) | Aziridine crosslinked acrylate resin two-component water-based automobile coating and preparation method thereof | |
| CN104263045A (en) | Water-based epoxy anticorrosive paint and preparation method thereof | |
| CN105295500B (en) | Paint dispersant | |
| CN103834037A (en) | Preparation method of leather finishing agent for water-soluble chitosan modified acrylic resin | |
| CN105669915A (en) | Water-soluble epoxy silicone acrylic resin and preparation method thereof | |
| CN107955440A (en) | A kind of corrosion-resistant water paint | |
| WO2015127794A1 (en) | Photocuring coating and preparation method therefor | |
| CN107641397A (en) | A kind of fade-proof coating and preparation method thereof | |
| CN104693338A (en) | Acrylic hyperdispersing agent and preparation method thereof | |
| CN105061693B (en) | Acrylic acid composite epoxy resin and the environmentally friendly acrylic acid composite epoxy coating comprising the resin and preparation method thereof | |
| CN106675334A (en) | Safe type aqueous bicomponent epoxy primer and preparation method thereof | |
| CN104789030A (en) | Film-forming assistant for environment-friendly latex paints and preparation method thereof | |
| CN105295501B (en) | Dispersing agent | |
| CN109294423B (en) | Water-based nano polyaniline-polyurethane conductive anticorrosive paint and preparation method thereof | |
| CN105907274A (en) | Environment-friendly water-based metal anti-rust paint | |
| CN104293074A (en) | Alcohol acid modified crylic acid resin coating and synthesis method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |