CN105295502A - Dispersant for waterborne paint - Google Patents
Dispersant for waterborne paint Download PDFInfo
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- CN105295502A CN105295502A CN201510773263.0A CN201510773263A CN105295502A CN 105295502 A CN105295502 A CN 105295502A CN 201510773263 A CN201510773263 A CN 201510773263A CN 105295502 A CN105295502 A CN 105295502A
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Abstract
The invention discloses a dispersant for a waterborne paint. The dispersant is prepared from the following components: acrylic acid, methyl methacrylate, white carbon black, glycol, an organic solvent, n-amyl alcohol, propane diacid, an initiator, sodium hydrosulphite and a neutralizer. The dispersant provided by the invention can reduce surface tension of the waterborne paint, improves wetting effect on pigment particles, allows the pigment particles to be stably dispersed in a liquid phase, can rapidly and firmly bond with surface groups of the paint and enables the pigment particles to stably suspend in a hydrosolvent so as to allow pigment to be well dispersed, thereby achieving optimal dispersion effect; and through addition of white carbon black, the effect and speed of dispersion are improved. During preparation of the dispersant, the initiator is added in multiple steps instead of one step in the prior art, so the molecular weight of resultant and product distribution are changed, and the prepared dispersant has good dispersion performance and good capability of tolerating changes of environment temperature.
Description
Technical field
The present invention relates to chemicals field, particularly relate to a kind of water-borne coatings dispersion agent.
Background technology
Dispersion agent is a kind of interfacial agent simultaneously in molecule with lipophilicity and wetting ability two kinds of opposite nature, homogeneous dispersion can be insoluble in the solid particulate of inorganic, the pigment dyestuff of liquid, prevent sedimentation and the cohesion of solid particulate simultaneously.The raising that people require health environment-friendly, Environmental Protective Water-paint becomes the new lover in building decoration field.But the surface tension of water is more much larger than organic solvent, just needs to add the surface tension that some auxiliary agents reduce water, strengthen the wetting action to granules of pigments, make the dispersion that granules of pigments is stable in the liquid phase.But many dispersion agents that existing market produces, dispersion effect is not obvious, and efficiency is low.
Summary of the invention
The object of this invention is to provide a kind of water-borne coatings dispersion agent.
The present invention is achieved through the following technical solutions:
A kind of water-borne coatings dispersion agent, be made up of following composition by weight, 15 parts, vinylformic acid, methyl methacrylate 15 parts, white carbon black 2 parts, ethylene glycol 10 parts, organic solvent 60 parts, Pentyl alcohol 1 part, propanedioic acid 3 parts, initiator 2 parts, S-WAT 4 parts, neutralizing agent 4 parts; It is made up of following making step:
1) add organic solvent in a kettle., be heated to 65-70 DEG C, constant temperature process 1-1.5 hour, then add vinylformic acid, methyl methacrylate, at 6-10Mpa pressure, at 95-100 DEG C, add initiator, reaction 8-9 hour;
2) Pentyl alcohol, propanedioic acid and white carbon black are passed under 55-60 DEG C, 15-18MPa pressure nitrogen and react 40-45 minute;
3) by 1) and 2) middle gained raw material mixing, when being heated to 60 DEG C, add ethylene glycol, when temperature rises to 85 DEG C, add S-WAT, when temperature is elevated to 105 DEG C, stops intensification, react after 1-2 hour, be quickly cooled to 35-40 DEG C, take out material;
4) by 3) in the material that takes out put into colloidal mill grinding after 1 hour, then put into a mixing bowl, stir 1-1.5 minute;
5) by 4) in material add after neutralizing agent, removing organic solvent, stirs after 30 minutes, seals 1 hour, then put into clarifixator homogeneous 45 minutes.
Further, described organic solvent is acetone.
Further, described initiator is ammonium persulphate.
Further, described neutralizing agent is sodium hydroxide.
Further, in described step 1), initiator adds speed is added 0.5 weight part initiator every 1 hour.
The invention has the beneficial effects as follows, compared with prior art:
Dispersion agent of the present invention can reduce the surface tension of water-borne coatings, strengthen the wetting action to granules of pigments, make the dispersion that granules of pigments is stable in the liquid phase, and firmly can be combined rapidly with coating surface group, make pigment particles stable be suspended in water solvent, make pigment obtain preferably dispersion, reach best dispersion effect, by adding modified white carbon black, improve dispersion effect and rate of dispersion; Dispersion agent of the present invention is in making processes, gradation interpolation initiator is changed into by changing disposable interpolation initiator in the past, change the molecular weight of resultant and the distribution of product, make the dispersion agent made not only have good dispersing property, also there is the ability of good resistance to variation of ambient temperature.
Embodiment
A kind of water-borne coatings dispersion agent, be made up of following composition by weight, 15 parts, vinylformic acid, methyl methacrylate 15 parts, white carbon black 2 parts, ethylene glycol 10 parts, organic solvent 60 parts, Pentyl alcohol 1 part, propanedioic acid 3 parts, initiator 2 parts, S-WAT 4 parts, neutralizing agent 4 parts; It is made up of following making step:
1) add organic solvent in a kettle., be heated to 65-70 DEG C, constant temperature process 1-1.5 hour, then add vinylformic acid, methyl methacrylate, at 6-10Mpa pressure, at 95-100 DEG C, add initiator, reaction 8-9 hour;
2) Pentyl alcohol, propanedioic acid and white carbon black are passed under 55-60 DEG C, 15-18MPa pressure nitrogen and react 40-45 minute;
3) by 1) and 2) middle gained raw material mixing, when being heated to 60 DEG C, add ethylene glycol, when temperature rises to 85 DEG C, add S-WAT, when temperature is elevated to 105 DEG C, stops intensification, react after 1-2 hour, be quickly cooled to 35-40 DEG C, take out material;
4) by 3) in the material that takes out put into colloidal mill grinding after 1 hour, then put into a mixing bowl, stir 1-1.5 minute;
5) by 4) in material add after neutralizing agent, removing organic solvent, stirs after 30 minutes, seals 1 hour, then put into clarifixator homogeneous 45 minutes.
Further, described organic solvent is acetone.
Further, described initiator is ammonium persulphate.
Further, described neutralizing agent is sodium hydroxide.
Further, in described step 1), initiator adds speed is added 0.5 weight part initiator every 1 hour.
As pH ≈ 9.0, the dispersion effect of dispersion agent is best.
The coating prepared with dispersion agent of the present invention has the viscosity of 25mPas at 30 DEG C, at room temperature stores 60 days, the viscosity of coating, microcosmic disperse phase, dispersity and settling time performance all comparatively outstanding.
Claims (5)
1. a water-borne coatings dispersion agent, it is characterized in that, be made up of following composition by weight, 15 parts, vinylformic acid, methyl methacrylate 15 parts, white carbon black 2 parts, ethylene glycol 10 parts, organic solvent 60 parts, Pentyl alcohol 1 part, propanedioic acid 3 parts, initiator 2 parts, S-WAT 4 parts, neutralizing agent 4 parts; It is made up of following making step:
1) add organic solvent in a kettle., be heated to 65-70 DEG C, constant temperature process 1-1.5 hour, then add vinylformic acid, methyl methacrylate, at 6-10Mpa pressure, at 95-100 DEG C, add initiator, reaction 8-9 hour;
2) Pentyl alcohol, propanedioic acid and white carbon black are passed under 55-60 DEG C, 15-18MPa pressure nitrogen and react 40-45 minute;
3) by 1) and 2) middle gained raw material mixing, when being heated to 60 DEG C, add ethylene glycol, when temperature rises to 85 DEG C, add S-WAT, when temperature is elevated to 105 DEG C, stops intensification, react after 1-2 hour, be quickly cooled to 35-40 DEG C, take out material;
4) by 3) in the material that takes out put into colloidal mill grinding after 1 hour, then put into a mixing bowl, stir 1-1.5 minute;
5) by 4) in material add after neutralizing agent, removing organic solvent, stirs after 30 minutes, seals 1 hour, then put into clarifixator homogeneous 45 minutes.
2. a kind of water-borne coatings dispersion agent according to claim 1, is characterized in that, described organic solvent is acetone.
3. a kind of water-borne coatings dispersion agent according to claim 1, is characterized in that, described initiator is ammonium persulphate.
4. a kind of water-borne coatings dispersion agent according to claim 1, is characterized in that, described neutralizing agent is sodium hydroxide.
5. a kind of water-borne coatings dispersion agent according to claim 1, is characterized in that, in described step 1), initiator adds speed is added 0.5 weight part initiator every 1 hour.
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 true CN105295502A (en) | 2016-02-03 |
| CN105295502B CN105295502B (en) | 2021-03-02 |
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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 |
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| CN (1) | CN105295502B (en) |
Cited By (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 (4)
| 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 |
| US20080306189A1 (en) * | 2007-06-07 | 2008-12-11 | Xerox Corporation | Non-aqueous compositions containing nanosized particles of monoazo laked pigment |
| 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 |
-
2015
- 2015-11-13 CN CN201510773263.0A patent/CN105295502B/en active Active
Patent Citations (4)
| 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 |
| US20080306189A1 (en) * | 2007-06-07 | 2008-12-11 | Xerox Corporation | Non-aqueous compositions containing nanosized particles of monoazo laked pigment |
| 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 (3)
| Title |
|---|
| 裴传友等: "《中学化学教学情景素材》", 30 September 2012 * |
| 辛高峰等: "正辛醇改性白炭黑的表面工艺", 《武汉工程大学学报》 * |
| 马立志: "丙烯酸与丙烯酸甲酯共聚型分散剂", <中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑> * |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN105295502B (en) | 2021-03-02 |
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