CN104974587B - Water-based system pigment double type non ionic polymer dispersant, preparation method, its application and water paint - Google Patents
Water-based system pigment double type non ionic polymer dispersant, preparation method, its application and water paint Download PDFInfo
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- CN104974587B CN104974587B CN201510307033.5A CN201510307033A CN104974587B CN 104974587 B CN104974587 B CN 104974587B CN 201510307033 A CN201510307033 A CN 201510307033A CN 104974587 B CN104974587 B CN 104974587B
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Abstract
The present invention relates to coating processing technique fields, and in particular to a kind of water-based system pigment double type non ionic polymer dispersant, preparation method, its application and water paint.By monomer A and monomer B, free radical polymerization forms the block polymer segment of hydroxyl end to material respectively, then is obtained with spacer group diisocyanate or diacid or anhydride reaction.Due to being high-molecular type dispersing agent, so larger steric hindrance can be provided, it can effectively prevent the flocculation of pigment, due to using double type structure, monomolecular dispersion agent it is more efficient, due to segment by monomer A and monomer B form have amphiphilic block structure, be one of most effective structure of dispersant, and the amphipathic of block structure may insure excellent dissolution in water, and carry out good absorption to pigment.
Description
Technical field
The present invention relates to coating processing technique fields, and in particular to a kind of water-based system pigment double type nonionic high score
Sub- dispersant, preparation method, its application and water paint.
Background technology
The surfaces such as building, bridge, ship and upholstery all be unable to do without coating, and make one kind of the gorgeous beauty of paint colors
Most important auxiliary agent is exactly dispersant, and dispersant causes pigment particles full and uniform dispersion in coating system, to greatest extent
Play the characteristic of pigment.Due to the toxicity and pollution of organic solvent, it is imperative to greatly develop water paint, and it is domestic about
So that the research of the dispersant of pigment fine dispersion is also fewer in water-based system, what is largely studied is the polymerization of acrylates
Object either maleic anhydride and the copolymer of acrylics, the present invention provides a kind of increasingly complex and effective dispersant knots
Structure, i.e. the double type non ionic polymer dispersant of the water-based system pigment with amphiphilic block structure, the dispersant can be
The inorganic, organic pigment of good dispersion in water, shortens jitter time, improves gloss, improves tinting strength, tinting power and covering power, improves color development
Property and toning property, prevent floating, prevent from flocculating, prevent from settling.
Invention content
Make pigment good wet and the synthesis problem of not flocculated dispersant in water-based system present invention aims at solution,
It provides a kind of with the water-based system pigment double type non ionic polymer dispersant of amphiphilic block structure and its preparation side
Method and application.
To reach above-mentioned goal of the invention, technical solution provided by the invention is as follows.
A kind of water-based system pigment double type non ionic polymer dispersant has A1-B1-C-B2-A2Or A1-C-A2's
General structure, wherein：
Block A1Monomer for acrylic acid, methacrylic acid, maleic anhydride, poly glycol monomethyl ether or acrylic acid amides,
Block A2Monomer for acrylic acid, methacrylic acid, maleic anhydride, poly glycol monomethyl ether or acrylic acid amides, block A1With it is embedding
Section A2Single phase it is same, block A1With block A2The degree of polymerization it is identical.
B block1Monomer be methyl methacrylate, butyl methacrylate, styrene, caprolactone or methylbenzene second
Alkene, B block2Monomer for methyl methacrylate, butyl methacrylate, styrene, caprolactone or methyl styrene, block
B1With B block2Single phase it is same, B block1With B block2The degree of polymerization it is identical.
The parent of connecting section C is diisocyanate, diacid or acid anhydrides.
When for A1-B1-C-B2-A2During class compound, both sides end group be alkyl, B1It is connect with C by ester group, C and B2Pass through
Ester group connects.
When for A1-C-A2During class compound, both sides end group be alkyl, A1It is connect with C by ester group, C and A2Connected by ester group
It connects.
More than, as block A1Monomer be poly glycol monomethyl ether when, B block1Monomer be caprolactone；As block A2's
When monomer is poly glycol monomethyl ether, B block2Monomer be caprolactone.
Preferably, the parent of connecting section C is selected from phenyl diisocyanate, phenyl diacid or phenyl acid anhydrides.
Specifically, the parent of connecting section C is any one in TDI, MDI, neck phthalic acid or 1,8- naphthalic anhydride
Kind.
Preferably：A1The degree of polymerization be 8~40, A2The degree of polymerization be 8~40, B1The degree of polymerization be 3~20, B2Polymerization
Spend is 3~20.
The weight average molecular weight of more than dispersant is 2000~10000g/mol,
The present invention also provides the preparation method of above-mentioned water-based system pigment double type non ionic polymer dispersant, packets
Include following steps：
1) by 10%~50% monomer A, 5%~25% initiator, 5%~25% free radical polymerization chain-transferring agent
Temperature reaction after being mixed with whole water-miscible organic solvents.
Wherein：
On the basis of the gross mass of monomer A and monomer B, the quality of monomer A is more than or equal to 50wt% and is less than or equal to
100wt%, surplus are monomer B.
On the basis of the gross mass of monomer A and monomer B, the quality of free radical polymerization chain-transferring agent is 1.5%~10%.
That is, the mass ratio of the quality of free radical polymerization chain-transferring agent and the gross mass of monomer A and monomer B is 1.5%~10%.
Specifically, free radical polymerization chain-transferring agent is mercaptoalcohol, preferably mercaptoethanol.
On the basis of the gross mass of monomer A and monomer B, the quality of initiator is 0.5%~5%.That is, the quality of initiator
It is 0.5%~5% with monomer A and the mass ratio of the gross mass of monomer B.
Specifically, initiator is any one in azodiisobutyronitrile, ammonium persulfate, potassium peroxydisulfate, sodium peroxydisulfate.
Water-miscible organic solvent is in N,N-dimethylformamide, acetone, butanone, tetrahydrofuran, dioxane etc.
The mixing of any one or more.
When on the basis of the gross mass of monomer A and monomer B, the quality of monomer A is more than or equal to 50wt% and less than 100wt%
When.
2) the remaining whole monomer A of mixed solution and dripping, 5%~25% initiator and 5% obtained to step 1)
~25% free radical polymerization chain-transferring agent is dripped off in 1~3h.
3) the monomer B of mixed solution and dripping whole, remaining whole initiator and the remaining whole obtained to step 2)
Free radical polymerization chain-transferring agent, drip off, then 3~6h of insulation reaction in 1~3h.
4) articulation agent C and catalyst are added in into the mixed solution that step 3) obtains, reacts 3~6h.
5) amine is added in into the mixed solution that step 4) obtains to react away remaining isocyano or carboxyl.
When on the basis of the gross mass of monomer A and monomer B, when the quality of monomer A is equal to 100wt%, A is obtained1-C-A2Class
Compound.Correspondingly, subsequent step is：
2) the remaining whole monomer A of mixed solution and dripping that obtain to step 1), remaining initiator and it is remaining from
It by base polymerizable chain transfer agents, is dripped off in 1~3h, then 3~6h of insulation reaction；
3) articulation agent C and catalyst are added in into the mixed solution that step 2) obtains, reacts 3~6h；
4) amine is added in into the mixed solution that step 3) obtains to react away remaining isocyano or carboxyl
The present invention also provides the application of above-mentioned water-based system pigment double type non ionic polymer dispersant, applications
In paint field.
The present invention also provides a kind of water paints, and it includes water-based system pigment double type provided by the present invention is non-
Ion macromolecule dispersing agent, water-based system pigment with 5% that double type non ionic polymer dispersant is pigment mass~
140%.
Specifically, in water paint, titanium dioxide is the 5~6% of pigment mass, carbon black for pigment mass 70~
140%.Pigment includes inorganic pigment and organic pigment, with weight, accounts for 10~15% and 30~90% respectively.
In water-based system pigment dispersant provided by the present invention, monomer A is formed after free radical polymerization with one
Determine the block of the degree of polymerization, then free radical polymerization occurs with monomer B.Block increases to a certain extent, finally by free radical polymerization chain
The residue sealing end of transfer agent, obtains side end group as alkyl, block of the opposite side end group for the AnBm types of alcoholic extract hydroxyl group.Two groups of blocks
Again with spacer group diisocyanate or monoisocyanates or diacid or anhydride reaction to get the dispersant.
Then it is that A directly causes B ring-opening polymerisations when monomer A is poly glycol monomethyl ether, B is caprolactone.
Advantageous effect：
Due to being high-molecular type dispersing agent, so larger steric hindrance can be provided, the wadding of pigment can be effectively prevent
It is solidifying.
Due to use double type structure, monomolecular dispersion agent it is more efficient, since segment is by monomer A and monomer B groups
Into have amphiphilic block structure, be one of most effective structure of dispersant, and the amphipathic of block structure can be true
Excellent dissolution in water is protected, and good absorption is carried out to pigment.
Description of the drawings
Fig. 1 is the gpc measurement figure of the molecular weight of the intermediate product of embodiment 1.
Fig. 2 is the gpc measurement figure of the weight average molecular weight of the intermediate product of embodiment 1.
Fig. 3 is the gpc measurement figure of the molecular weight of the target product of embodiment 1.
Fig. 4 is the gpc measurement figure of the weight average molecular weight of the target product of embodiment 1.
Fig. 5 is the viscosity of the water paint for the target product for applying embodiment 1 with the change curve of shear rate.
Fig. 6 is the shear stress of the water paint for the target product for applying embodiment 1 with the change curve of shear rate.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
Embodiment 1
1) solvent dioxane 50g is taken, is added to stirring, heating, thermometer, reflux, charging, nitrogen protection device
250ml there-necked flasks in, then take dried monomeric acrylic amide 20g, chain-transferring agent mercaptoethanol 1g, initiator A IBN
0.14g is sufficiently mixed, and is added in there-necked flask, after leading to nitrogen 0.5h, is heated to 76 DEG C；
2) by acrylic acid amides 40g, chain-transferring agent mercaptoethanol 2g, initiator A IBN0.28g are sufficiently mixed, are added drop-wise to
1) it in mixed solution, is added dropwise 1.5 hours；
3) when step 2) is added drop-wise to 1h, by methyl methacrylate 20g, chain-transferring agent mercaptoethanol 1g, initiator
AIBN0.14g is sufficiently mixed, and is added drop-wise in step 2) mixed solution, is added dropwise 1 hour, and it is 1000 to measure molecular weight, Weight-average molecular
It is 1200 to measure, and molecular weight is measured by GPC, such as Fig. 1,2；
4) after step 3) drips, 3h is reacted, initiator A IBN0.08g is added, is warming up to 85 DEG C, then react 1h；
5) 6.1gMDI is scattered in 17g dioxane, ultrasonic 10min, adds in 8 drop dibutyl tin dilaurates, mixing
Uniformly, it is added in the mixed solution of step 4), reacts 4h；
6) stop heating, add in 0.2g methanol, react 1h, discharging obtains the water-based system pigment with amphiphilic block structure
With double type non ionic polymer dispersant, number-average molecular weight 2000, weight average molecular weight 2400, molecular weight is measured by GPC,
Such as Fig. 3,4.
The obtained water-based system pigment with amphiphilic block structure is carried out with double type non ionic polymer dispersant
Rheology is tested.Formula 1 is as follows：Dispersant 6.5g, water 13.5g, carbon black 5g, planetary ball mill 12h.Rheological results such as Fig. 5,6,
Middle Fig. 5 is change curve of the viscosity with shear rate, and Fig. 6 is change curve of the shear stress with shear rate.
Embodiment 2
1) solvent dioxane 100g is taken, is added to stirring, heating, thermometer, reflux, charging, nitrogen protection dress
In the 500ml there-necked flasks put, then dried monomeric acrylic 20g is taken, chain-transferring agent mercaptoethanol 1g, initiator A IBN
0.14g is sufficiently mixed, and is added in there-necked flask, after leading to nitrogen 0.5h, is heated to 76 DEG C；
2) by acrylic acid 40g, chain-transferring agent mercaptoethanol 2g, initiator A IBN0.28g are sufficiently mixed, are added drop-wise to and 1) mix
It closes in solution, is added dropwise 1.5 hours；
3) when step 2) is added drop-wise to 1h, by methyl methacrylate 20g, chain-transferring agent mercaptoethanol 1g, initiator
AIBN 0.14g, are sufficiently mixed, and are added drop-wise in step 2) mixed solution, are added dropwise 1 hour；
4) after step 3) drips, 3h is reacted, initiator A IBN0.08g is added, is warming up to 85 DEG C, then react 1h；
5) 6.1gMDI is scattered in 17g dioxane, ultrasonic 10min, adds in 8 drop dibutyl tin dilaurates, mixing
Uniformly, it is added in the mixed solution of step 4), reacts 4h；
6) stop heating, add in triethylamine and neutralize, discharging obtains having the water-based system pigment of amphiphilic block structure with double
Subtype non ionic polymer dispersant, number-average molecular weight 2000, weight average molecular weight 2300.
Embodiment 3
The dosage of the present embodiment mercaptoethanol as different from Example 2, total amount are changed to 3g, each step additional proportion by 4g
Equally, the number-average molecular weight of the dispersant as a result obtained is 3300, weight average molecular weight 3700.
Embodiment 4
1) solvent dioxane 50g is taken, is added to stirring, heating, thermometer, reflux, charging, nitrogen protection device
250ml there-necked flasks in, then take dried poly glycol monomethyl ether -1000,20 caprolactones of 60g, 10 drop octoate catalysts are sub-
Tin, 140 DEG C of condition of nitrogen gas react 12h；
2) 85 DEG C are cooled to, 6.1gMDI is scattered in 17g dioxane, ultrasonic 10min adds in 8 drop dibutyl tins
Cinnamic acid tin is uniformly mixed, is added in the mixed solution of step 1), reacts 4h；
3) stop heating, add in 0.2g n-butylamines, discharging obtains having the water-based system pigment of amphiphilic block structure with double
Subtype non ionic polymer dispersant, number-average molecular weight 3000, weight average molecular weight 3300.
Embodiment 5
1) solvent dioxane 50g is taken, is added to stirring, heating, thermometer, reflux, charging, nitrogen protection device
250ml there-necked flasks in, then take dried poly glycol monomethyl ether -1000 of 80g, be warming up to 85 DEG C,
2) 6.1gMDI is scattered in 17g dioxane, ultrasonic 10min, adds in 8 drop dibutyl tin dilaurates, mixing
Uniformly, it is added in the mixed solution of step 1), reacts 4h；
3) stop heating, add in 0.2g n-butylamines, discharging obtains water-based system pigment double type non ionic polymer point
Powder, number-average molecular weight 2200, weight average molecular weight 2400.
Embodiment 6
1) solvent dioxane 100g is taken, is added to stirring, heating, thermometer, reflux, charging, nitrogen protection dress
In the 500ml there-necked flasks put, then dried monomeric acrylic 20g is taken, chain-transferring agent mercaptoethanol 1g, initiator A IBN
0.14g is sufficiently mixed, and is added in there-necked flask, after leading to nitrogen 0.5h, is heated to 76 DEG C；
2) by acrylic acid 40g, chain-transferring agent mercaptoethanol 2g, initiator A IBN0.28g are sufficiently mixed, are added drop-wise to and 1) mix
It closes in solution, is added dropwise 1.5 hours；
3) when step 2) is added drop-wise to 1h, by styrene 10g, chain-transferring agent mercaptoethanol 0.5g, initiator A IBN
0.07g is sufficiently mixed, and is added drop-wise in step 2) mixed solution, is added dropwise 1 hour；
4) after step 3) drips, 3h is reacted, initiator A IBN0.08g is added, is warming up to 85 DEG C, then react 1h；
5) 6.1gMDI is scattered in 17g dioxane, ultrasonic 10min, adds in 8 drop dibutyl tin dilaurates, mixing
Uniformly, it is added in the mixed solution of step 4), reacts 4h；
6) stop heating, add in triethylamine and neutralize, discharging obtains having the water-based system pigment of amphiphilic block structure with double
Subtype non ionic polymer dispersant, number-average molecular weight 2000, weight average molecular weight 2300.
The foregoing is merely the better embodiments of the present invention, are not intended to limit the invention, all spirit in the present invention
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of preparation method of water-based system pigment double type non ionic polymer dispersant, which is characterized in that including such as
Lower step：
1) by 10%~50% monomer A, 5%~25% initiator, 5%~25% free radical polymerization chain-transferring agent with it is complete
Temperature reaction after the water-miscible organic solvent mixing in portion；
2) the remaining whole monomer A of mixed solution and dripping that obtain to step 1), 5%~25% initiator and 5%~
25% free radical polymerization chain-transferring agent is dripped off in 1~3h, then the monomer B, remaining whole to mixed solution and dripping whole
Initiator and it is left whole free radical polymerization chain-transferring agents, is dripped off, then 3~6h of insulation reaction in 1~3h；
3) articulation agent C and catalyst are added in into the mixed solution that step 2) obtains, reacts 3~6h；
4) amine is added in into the mixed solution that step 3) obtains to react away remaining isocyano or carboxyl；
Wherein, the free radical polymerization chain-transferring agent is mercaptoalcohol；
The monomer A is acrylic acid, methacrylic acid, maleic anhydride or acrylic acid amides；
The monomer B is methyl methacrylate, butyl methacrylate, styrene or methyl styrene；
The articulation agent C is diisocyanate, diacid or acid anhydrides.
2. the preparation method of water-based system pigment double type non ionic polymer dispersant according to claim 1,
It is characterized in that：On the basis of the gross mass of monomer A and monomer B, the quality of monomer A is more than or equal to 50wt% and is less than 100wt%,
Surplus is monomer B；On the basis of the gross mass of monomer A and monomer B, the quality of free radical polymerization chain-transferring agent for 1.5%~
10%；On the basis of the gross mass of monomer A and monomer B, the quality of initiator is 0.5%~5%.
3. the preparation method of water-based system pigment double type non ionic polymer dispersant according to claim 1,
It is characterized in that：The articulation agent C is selected from phenyl diisocyanate, phenyl diacid or phenyl acid anhydrides.
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| CN115029940B (en) * | 2022-05-24 | 2024-02-09 | 苏州大学 | Application of polyether/polyester diblock copolymer as dispersing agent in preparation of liquid disperse dye color paste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611555A (en) * | 2003-10-28 | 2005-05-04 | 上海市涂料研究所 | Water-based pigment dispersing agent for latex water paint |
| CN101490128A (en) * | 2006-07-14 | 2009-07-22 | 东洋油墨制造株式会社 | Polyester dispersant, process for production of the same, and pigment composition using the same |
| CN102432800A (en) * | 2011-09-05 | 2012-05-02 | 惠州市汉诺新材料有限公司 | Water-oil dual-purpose dispersion agent as well as preparation method and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611555A (en) * | 2003-10-28 | 2005-05-04 | 上海市涂料研究所 | Water-based pigment dispersing agent for latex water paint |
| CN101490128A (en) * | 2006-07-14 | 2009-07-22 | 东洋油墨制造株式会社 | Polyester dispersant, process for production of the same, and pigment composition using the same |
| CN102432800A (en) * | 2011-09-05 | 2012-05-02 | 惠州市汉诺新材料有限公司 | Water-oil dual-purpose dispersion agent as well as preparation method and application thereof |
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Effective date of registration: 20190115 Address after: 430000 Building 6, No. 79 Jiangxing Road, Jianghan District, Wuhan City, Hubei Province Patentee after: Wuhan Kahui Fine Chemical Technology Co., Ltd. Address before: 430223 No. 17, 3rd floor, Pioneer Building, Wuhan University Science Park, University Park Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN JINHONGYANG CHEMICAL TECHNOLOGY CO., LTD. |
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Correction item: Patentee|Address Correct: Wuhan Jiahui Jinghua Technology Co., Ltd.|430000 Building 6, No. 79 Jiangxing Road, Jianghan District, Wuhan City, Hubei Province False: Wuhan Kahui Fine Chemical Technology Co., Ltd.|430000 Building 6, No. 79 Jiangxing Road, Jianghan District, Wuhan City, Hubei Province Number: 05-02 Volume: 35 |