CN108479632B - Preparation method of water-based dispersant with pigment universality - Google Patents
Preparation method of water-based dispersant with pigment universality Download PDFInfo
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- CN108479632B CN108479632B CN201810316418.1A CN201810316418A CN108479632B CN 108479632 B CN108479632 B CN 108479632B CN 201810316418 A CN201810316418 A CN 201810316418A CN 108479632 B CN108479632 B CN 108479632B
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- pigment
- maleic anhydride
- solvent
- aqueous dispersant
- universality
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/16—Amines or polyamines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Abstract
The invention discloses a preparation method of an aqueous dispersant with pigment universality, which comprises the following steps: s1, washing and drying the reaction kettle until the reaction kettle is anhydrous, adding the dried and dehydrated polyethylene glycol diamine and the catalyst, and introducing nitrogen; s2, adding a solvent and a styrene maleic anhydride polymer, heating and uniformly stirring, reacting for 5-8 hours, vacuumizing to-0.1 Mpa, and pumping off the solvent; and S3, adding polyethylene polyamine, heating and uniformly stirring, reacting for 4-8 hours, and cooling to room temperature to obtain the finished product. The water-based dispersant prepared by the invention has good hydrophilicity, does not cause the phenomenon of water distribution after storage, and has good wetting and dispersing effects on various pigments and fillers.
Description
Technical Field
The invention relates to the technical field of pigment dispersants, and particularly relates to a preparation method of a water-based dispersant with pigment universality.
Background
The dispersant can well wet, disperse and stabilize the pigment and filler in a system, and is widely applied to the fields of coatings, printing ink, plastics, leather and the like. With the development of national economy, the requirements of people on the environment are increasingly improved, and the requirements on water-based coatings, water-based inks and the like which do not contain organic volatile matters are continuously increased. The traditional dispersant is mainly applied to a solvent-based system, the newly developed water-based dispersant in the market has few varieties, and the problems of good dispersing effect only aiming at certain specific pigments and fillers, poor universal dispersibility of the pigments and fillers and easy water diversion during storage exist.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a preparation method of an aqueous dispersant with pigment universality, which can have good dispersion effect on various pigments and fillers in aqueous coatings and aqueous inks and can not generate the defect of water separation during storage by grafting polyethylene glycol diamine with good hydrophilicity and polyethylene polyamine with good pigment and filler anchoring effect.
The technical scheme of the invention is as follows:
a preparation method of an aqueous dispersant with pigment universality comprises the following steps:
s1: cleaning and drying the reaction kettle until no water exists, adding the dried and dewatered polyethylene glycol diamine and a catalyst, and introducing nitrogen;
s2: adding a solvent and a styrene maleic anhydride polymer, heating and stirring for reaction for 5-8 hours, vacuumizing to-0.1 Mpa, and pumping off the solvent;
s3: adding polyethylene polyamine, heating and stirring for reaction for 4-8 hours, and cooling to room temperature to obtain the finished product.
The styrene maleic anhydride copolymer is used as a main chain and has stable property, the polyethylene glycol diamine is mainly used for increasing the hydrophilicity of the styrene maleic anhydride copolymer and partially anchoring the pigment, the polyethylene polyamine is used as an anchoring group and has good anchoring effect on various pigments and fillers, and the solvent (acetone, butanone and pentanone) is mainly used for dissolving the styrene maleic anhydride copolymer and enabling the reaction to react in a homogeneous phase. Importantly, the invention grafts the polyethylene glycol diamine on the styrene maleic anhydride copolymer, so that the prepared dispersant has good hydrophilicity, does not generate the phenomenon of water separation after storage, and has good wetting and dispersing effects on various pigments and fillers.
In the invention, the addition of nitrogen is protective gas, so that the reaction is fully and fully carried out in the environment of isolating oxygen and moisture.
The preparation method of the water-based dispersant with pigment universality is characterized in that the heating temperature in the step S3 is controlled to be 70-130 ℃.
The preparation method of the water-based dispersant with pigment universality is characterized in that the heating temperature in the step S4 is controlled to be 120-150 ℃.
The preparation method of the aqueous dispersant with pigment universality comprises the following steps of (1) according to molar ratio: catalyst: solvent styrene maleic anhydride polymer: polyethylene polyamine 100-: 1-10:200-220: 200-220:100-120.
The preparation method of the water-based dispersant with pigment universality comprises the step of preparing a catalyst, wherein the catalyst is any one of terephthalic acid and p-toluenesulfonic acid.
The preparation method of the water-based dispersant with pigment universality comprises the step of preparing a solvent from any one of acetone, butanone and pentanone.
The preparation method of the water-based dispersant with pigment universality comprises the step of preparing a styrene-maleic anhydride polymer, wherein the molar ratio of styrene to maleic anhydride is 1: 1.
The preparation method of the aqueous dispersant with pigment universality comprises the steps of enabling the molecular weight of the polyethylene glycol diamine to be 100-1000, enabling the molecular weight of the styrene maleic anhydride polymer to be 2000-10000, and enabling the molecular weight of the polyethylene polyamine to be 300-1000.
Has the advantages that: according to the preparation method of the water-based dispersant with pigment universality, the polyethylene glycol diamine is grafted on the styrene maleic anhydride copolymer, so that the hydrophilicity is good, and the phenomenon of water distribution after storage can be avoided; and has good wetting and dispersing effects on various pigments and fillers, including phthalocyanine blue, phthalocyanine green, chrome yellow, benzimidazolone red and the like.
Detailed Description
The present invention provides a method for preparing an aqueous dispersant having pigment versatility, and the present invention will be described in further detail below in order to make the objects, technical aspects, and effects of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The reaction kettle is cleaned and dried to be anhydrous, 1mol of polyethylene glycol diamine (molecular weight is 200) which is dried and dewatered and 0.01mol of catalyst (terephthalic acid) are added, nitrogen is introduced, 2mol of solvent (acetone) and 2mol of styrene maleic anhydride polymer (styrene: maleic anhydride is 1:1 (mol ratio), molecular weight is 2000) are added, and the temperature is raised to 70-130 ℃ and stirring is started. Reacting for 5h, vacuumizing to 0.1Mpa for 1 h, removing the solvent, adding 1mol of polyethylene polyamine (molecular weight of 300), heating to 120 ℃ and 150 ℃, reacting for 5h, and cooling to room temperature to obtain the finished product of the invention.
This embodiment is the most preferred embodiment.
Example 2
The reaction kettle is cleaned and dried to be anhydrous, 1mol of polyethylene glycol diamine (molecular weight is 1000) which is dried and dewatered and 0.1mol of catalyst (p-toluenesulfonic acid) are added, nitrogen is introduced, 2mol of solvent (butanone) and 2mol of styrene maleic anhydride polymer (styrene: maleic anhydride is 1:1 (molar ratio), molecular weight is 10000) are added, and the temperature is raised to 70-130 ℃ and stirring is started. Reacting for 8h, vacuumizing to 0.1Mpa for 1 h, removing the solvent, adding 1mol of polyethylene polyamine (molecular weight is 1000), heating to 120 ℃ and 150 ℃, reacting for 8h, and cooling to room temperature to obtain the finished product of the invention.
Example 3
The reaction kettle is cleaned and dried to be anhydrous, 1mol of polyethylene glycol diamine (molecular weight is 600) which is dried and dewatered and 0.05mol of catalyst (terephthalic acid) are added, nitrogen is introduced, 2mol of solvent (pentanone) and 2mol of styrene maleic anhydride polymer (styrene: maleic anhydride is 1:1 (molar ratio) and molecular weight is 6000) are added, and the temperature is raised to 70-130 ℃ and stirring is started. Reacting for 6h, vacuumizing to 0.1Mpa for 1 h, removing the solvent, adding 1mol of polyethylene polyamine (molecular weight of 600), heating to 120 ℃ and 150 ℃, reacting for 6h, and cooling to room temperature to obtain the finished product of the invention.
Example 4
The reaction kettle is cleaned and dried to be anhydrous, 1mol of polyethylene glycol diamine (molecular weight is 400) which is dried and dewatered and 0.08mol of catalyst (terephthalic acid) are added, nitrogen is introduced, 2mol of solvent (butanone) and 2mol of styrene maleic anhydride polymer (styrene: maleic anhydride is 1:1 (molar ratio), molecular weight is 4000) are added, and the temperature is raised to 70-130 ℃ and stirring is started. Reacting for 6h, vacuumizing to 0.1Mpa for 1 h, removing the solvent, adding 1mol of polyethylene polyamine (molecular weight of 800), heating to 120 ℃ and 150 ℃, reacting for 6h, and cooling to room temperature to obtain the finished product of the invention.
The invention compares the finished product obtained in example 1 with the following five pigments and fillers, and the comparison data is shown in the following table:
in the above table, DL represents the light and dark difference between the sample and the standard; DA represents the green-red difference of the sample from the standard; DB represents the blue-yellow difference of the sample from the standard; DE represents the total color difference of the sample from the standard.
The comparison of the above tests shows that the invention and the competitive products have the following effects on PR254 red, PB 15: the dispersing effect of 3 phthalocyanine blue, PG7 phthalocyanine green, PY13 yellow and PBK7 carbon black is better than competitive products in viscosity and fineness before and after heat storage, which shows that the dispersibility of the five most commonly used pigments and fillers is better than that of the competitive products; the color intensity of the layout effect after the paint preparation of the five pigments and fillers is also superior to or equal to that of a competitive product, and the color difference value of the layout effect after the paint preparation of the five pigments is also close to that of the competitive product. In conclusion, the dispersing effect of the pigment and filler in the aqueous system is better than that of competitive products.
According to the preparation method of the water-based dispersant with pigment universality, the polyethylene glycol diamine is grafted on the styrene maleic anhydride copolymer, so that the hydrophilicity is good, and the phenomenon of water distribution after storage can be avoided; and has good wetting and dispersing effects on various pigments and fillers, including phthalocyanine blue, phthalocyanine green, chrome yellow, benzimidazolone red and the like.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A preparation method of an aqueous dispersant with pigment universality is characterized by comprising the following steps:
s1: cleaning and drying the reaction kettle until no water exists, adding the dried and dewatered polyethylene glycol diamine and a catalyst, and introducing nitrogen;
s2: adding a solvent and a styrene maleic anhydride polymer, heating and stirring for reaction for 5-8 hours, vacuumizing to-0.1 Mpa, and pumping off the solvent;
s3: adding polyethylene polyamine, heating and stirring for reaction for 4-8 hours, and cooling to room temperature to obtain the finished product.
2. The method for producing an aqueous dispersant having pigment versatility according to claim 1, wherein the heating temperature in step S2 is controlled to 70 to 130 ℃.
3. The method for producing an aqueous dispersant having pigment versatility according to claim 1, wherein the heating temperature in step S3 is controlled to 120 to 150 ℃.
4. The method for preparing an aqueous dispersant having pigment versatility according to claim 1, characterized in that said polyethylene glycol diamine: catalyst: solvent styrene maleic anhydride polymer: polyethylene polyamine 100-: 1-10:200-220: 200-220:100-120.
5. The method for preparing an aqueous dispersant having pigment versatility according to claim 1, characterized in that the catalyst is any one of terephthalic acid and p-toluenesulfonic acid.
6. The method for producing an aqueous dispersant having pigment versatility according to claim 1, wherein the solvent is any one of acetone, methyl ethyl ketone, and methyl ethyl ketone.
7. The method for preparing an aqueous dispersant having pigment versatility according to claim 1, characterized in that the styrene maleic anhydride polymer has a molar ratio of styrene to maleic anhydride of 1: 1.
8. The method for preparing the aqueous dispersant with pigment universality according to claim 1, characterized in that the molecular weight of the polyethylene glycol diamine is 100-1000, the molecular weight of the styrene maleic anhydride polymer is 2000-10000, and the molecular weight of the polyethylene polyamine is 300-1000.
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| CN108479632B true CN108479632B (en) | 2020-08-11 |
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| CN109666148A (en) * | 2018-12-29 | 2019-04-23 | 东来涂料技术（上海）股份有限公司 | A kind of preparation method of aqueous dispersion |
| CN111335050B (en) * | 2020-03-30 | 2022-10-18 | 上海宇昂水性新材料科技股份有限公司 | Comb-type disperse dye dispersant for printing and preparation method thereof |
| CN115057952B (en) * | 2022-07-29 | 2023-09-15 | 岳阳凯门水性助剂有限公司 | Modified polystyrene maleic anhydride polymer and preparation method thereof, water-based dispersing agent and color paste |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1114109A (en) * | 1993-10-04 | 1995-12-27 | 旭化成工业株式会社 | Colorant composition |
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| CN101352666B (en) * | 2007-07-26 | 2010-08-25 | 中国石油化工股份有限公司 | Compound demulsifying agent and method of use thereof |
| TW200925178A (en) * | 2007-12-07 | 2009-06-16 | Univ Nat Taiwan | Polymeric polyamine and method for stabilizing silver nanoparticles using the same |
| TWI403373B (en) * | 2009-07-16 | 2013-08-01 | Univ Nat Taiwan | Method for producing silver nanoparticles by employing ethanolamine |
| CN106519249B (en) * | 2016-10-31 | 2018-11-30 | 天津赛菲化学科技发展有限公司 | A kind of novel high molecular polymer, preparation method and its application |
| CN107082887B (en) * | 2017-04-13 | 2019-12-31 | 佛山市贝特尔化工有限公司 | Preparation method and application of hyperdispersant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1114109A (en) * | 1993-10-04 | 1995-12-27 | 旭化成工业株式会社 | Colorant composition |
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