CN109679398A - A kind of polyurethane based water-based coating hyper-dispersant and preparation method thereof - Google Patents

A kind of polyurethane based water-based coating hyper-dispersant and preparation method thereof Download PDF

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CN109679398A
CN109679398A CN201811539902.7A CN201811539902A CN109679398A CN 109679398 A CN109679398 A CN 109679398A CN 201811539902 A CN201811539902 A CN 201811539902A CN 109679398 A CN109679398 A CN 109679398A
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hyper
dispersant
compound
polyurethane
water
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CN109679398B (en
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朱祥
郁金华
张晓明
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LIWANG (JIANGSU) Co.,Ltd.
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Jiangsu Lynwon Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30Low-molecular-weight compounds
    • C08G18/32Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203Polyhydroxy compounds
    • C08G18/3206Polyhydroxy compounds aliphatic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30Low-molecular-weight compounds
    • C08G18/38Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3855Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
    • C08G18/3857Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur having nitrogen in addition to sulfur

Abstract

The invention discloses a kind of polyurethane based water-based coating hyper-dispersants and preparation method thereof, the preparation method of the water paint hyper-dispersant includes: that Cyanuric Chloride is first reacted with sulfamic acid compound or hydroxyl sulfoacid compound, then it is reacted with dihydric alcohol or alcohol ammoniate, production contains sulfonic binary alcohol intermediate, this last binary alcohol intermediate reacts production polyurethane hyper-dispersant with diisocyanate, diatomic alcohol compounds in a solvent.Polyurethane hyper-dispersant prepared by the present invention can be used for high solid content water coating, and good fluidity, stability is high, bright-colored;Hyper-dispersant raw material of the present invention is cheap and easily-available, and preparation process is simple, and reaction can carry out at a lower temperature, no waste water and gas discharge.

Description

A kind of polyurethane based water-based coating hyper-dispersant and preparation method thereof
Technical field
The invention belongs to painting fields, and in particular to a kind of polyurethane based water-based coating hyper-dispersant and its preparation Method.
Background technique
Coating refers to be coated in body surface with specific construction method after, it is cured be formed in body surface it is certain strong The continuous protective film of degree, or it is formed with a kind of fine chemical product of certain specific function film.
Coating is generally made of film forming matter, solvent, pigment and auxiliary agent.Film forming matter is also known as base-material, is to keep coating secured It is attached to the main matter that continuous film is formed on coated body surface;Solvent is volatile ingredient, mainly have organic solvent and Water;Pigment is dispersed in the insoluble fine particle in paint vehicle, can be divided into coloring pigment and extender pigment, be mainly used for Color provides protection, decorates and reduce cost;Auxiliary agent share very little shared in formulation for coating material, but play a key role. Storage, construction, film forming and the tolerance performance of auxiliary agent coating suffer from most important effect.There is common auxiliary agent in coating: levelling Agent, thickener, surfactant, pigment dispersing agent, plasticizer, drier, curing agent and fungicide, mould inhibitor etc..
Pigment dispersing agent also becomes wetting dispersing agent, and common pigment dispersing agent mainly has inorganic, surfactant-based And high score subclass, effect preferably high score subclass, therefore high score subclass dispersing agent is also commonly referred to as hyper-dispersant.High score subclass includes Natural polymer is mainly used for solvent reducible coatings;Synthesis macromolecule have polycarboxylate, polyacrylate, poly-methyl acrylate, Maleic acid-isobutene (or styrene) copolymer salt, polyvinylpyrrolidone, polyether derivative etc..
Described in patent CN2008102009611 a kind of pigment dispersant by based on salicyclic acid derivatives and Preparation method and application;A kind of dispersing agent and preparation method thereof is described in patent CN201110235613X, method is to adopt Ring-opening polymerisation under the action of sodium alkoxide with anacardol and styrene oxide obtains after intermediate product same ethylene oxide polymerization again, system It is standby gone out a kind of pigment hyper-dispersant;Patent CN2012105602412 discloses a kind of waterborne pigment dispersant, with apple Further polycondensation based on the product that is reacted with polyethylene oxide of acid and obtain.Patent CN2007100241525 describe it is a kind of with Methyl n-butyl ketone is solvent, is the hyperbranched non-ionic water dispersing agent of raw material with all kinds of diisocyanate, branched polyester and polyethers; Patent CN2005800303658 describe it is a kind of using itaconic acid, the polyoxyethylene ester of citric acid and (methyl) acrylic acid as raw material, By the dispersing agent of free-radical polymerized preparation, but this dispersing agent is used primarily in cement dispersion and cement water reducing agent field; Patent CN2007100241525 describes a kind of preparation method of hyperbranched non-ionic dispersing agent, and raw materials are over-expense Change polyester, diisocyanate cpd and polyethers etc.;
CN201080054508 describes a kind of preparation method of cation-type water-thinned coating dispersant.Its specific method is It is made by polyacrylic-maleic copolymer and hydrophily primary amine reaction;CN201110119702.8, which is reported, a kind of utilizes third The water that the monomers such as olefin(e) acid, methacrylic acid and methylpropene sodium sulfonate, 2- acrylamide-2-methyl propane sulfonic are copolymerized Property coating dispersion preparation method;CN2007800190165 reports a kind of various unsaturated monomers of utilization, such as: maleic acid is poly- Ether monoesters, acrylic acid, maleic anhydride etc. carry out a kind of free-radical polymerized obtained aqueous coating dispersant of nonionic.
Patent 201511016207.9, which describes, a kind of utilizes water prepared by epoxy resin, alkyl alcoholamine and phosphorus oxychloride Property dispersible pigment color paste hyper-dispersant.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of polyurethane based water-based coating hyper-dispersant and its preparation side Method, using water paint prepared by this dispersing agent, solid content is high, good fluidity, and stability is high, bright-colored;This product Raw material is cheap and easily-available, and preparation process is simple, and reaction can carry out at a lower temperature, discharges substantially without waste water and gas.
The present invention is achieved by the following technical solutions:
A kind of polyurethane based water-based coating hyper-dispersant, the hyper-dispersant are prepared from the following raw materials: trichloro-triazine, Sulfoacid compound, diisocyanate cpd, diatomic alcohol compounds, alcohol amine compound, wherein trichloro-triazine and sulfonic acid chemical combination The molar ratio of object is 1:1, and the molar ratio of trichloro-triazine and diisocyanate cpd is 1:1~2:1.
Further, the sulfoacid compound is sulfamic acid compound or hydroxyl sulfoacid compound;The sulfamic acid Compound includes tarine, Homotaurine;The hydroxyl sulfoacid compound includes ethylenehydrinsulfonic acid, 3- hydroxyl third Sulfonic acid.
Further, the diisocyanate cpd is toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, different Buddhist That ketone diisocyanate or hexamethylene diisocyanate.
Further, the diatomic alcohol compounds be ethylene glycol, 1,3-PD, 1,2-PD, 1,4-butanediol, 1, 5- pentanediol, 1,6-HD, 1,4- cyclohexanedimethanol or neopentyl glycol.
Further, the alcohol amine compound is carbinolamine, ethanol amine, n-propanolamine or n-butanol amine.
A kind of preparation method of polyurethane based water-based coating hyper-dispersant, comprising the following steps:
In a solvent, trichloro-triazine reacts step 1) with sulfoacid compound, and 2- is made and replaces -4,6- dichloro s-triazine Object is closed, as intermediate I;
Step 2) step 1) the intermediate I, reacts with diatomic alcohol compounds or alcohol amine compound in a solvent, is made two Hydroxy compounds, as intermediate II;
Step 3) step 2) the intermediate II and diisocyanate cpd and diatomic alcohol compounds in a solvent, with two Dibutyl tin laurate reaction, ultimately produces the polyurethane based water-based coating hyper-dispersant.
Further, the step 1) solvent be water, acetonitrile, acetone, Isosorbide-5-Nitrae-dioxane, n,N-Dimethylformamide, Tetrahydrofuran or DMAC N,N' dimethyl acetamide;Step 2) the solvent is acetonitrile, acetone, 1,4- dioxane, N, N- dimethyl Formamide, tetrahydrofuran or DMAC N,N' dimethyl acetamide;Step 3) the solvent is acetonitrile, acetone, 1,4- dioxane, acetic acid Ethyl ester, N,N-dimethylformamide, tetrahydrofuran or DMAC N,N' dimethyl acetamide.
Further, in step 2), intermediate I is 1:2 with the molar ratio of diatomic alcohol compounds or alcohol amine compound;Step 3) in, the amount of the substance of diisocyanate cpd: (amount of amount+diatomic alcohol compounds substance of the substance of intermediate II)= 1:1~1:2.
Further, the reaction temperature of step 1) is 0~5 DEG C;The reaction temperature of step 2) is 30~95 DEG C.
Beneficial effects of the present invention are as follows:
Using polyurethane resin by it as hydrophobic parts, polyamino methyl esters and s-triazine structure in resin can be mentioned For enough " anchor point " in conjunction with granules of pigments, further by the polyoxyethylene ether segment on side chain, as water soluble group, The hydrophily ability for improving macromolecular, in addition, improving the resistance to pH value of dispersing agent as hydrophilic radical using polyether segment Energy.Using water paint prepared by this dispersing agent, solid content is high, good fluidity, and stability is high, bright-colored;This product Raw material is cheap and easily-available, and preparation process is simple, and reaction can carry out at a lower temperature, discharges substantially without waste water and gas.
Specific embodiment
The present invention is further elaborated below with reference to embodiment, but the present invention is not limited thereto.
A kind of polyurethane based water-based coating hyper-dispersant, raw material include trichloro-triazine, sulfoacid compound (sulfamic acid Compound or hydroxyl sulfoacid compound), diisocyanate cpd, diatomic alcohol compounds, alcohol amine compound.
Preparation method is as follows:
Step 1: trichloro-triazine (Cyanuric Chloride) and sulfamic acid compound or hydroxyl sulfoacid compound etc. in a solvent Reaction, preparation 2- replace -4,6- dichloro s-triazine compound, and as intermediate I, reaction equation is as follows:
In formula: M is O or NH;N is 2 or 3.
Step 2: intermediate I and carbinolamine, ethanol amine, n-propanolamine, ethylene glycol, propylene glycol, 1,4- cyclohexanedimethanol etc. In a solvent, 30~90 DEG C of reactions generate dihydroxy compounds, and as intermediate II, reaction equation is as follows:
In formula: M is O or NH;M is 1,2,3 or 4;N is 2 or 3;
R is-OCH2CH2,-OCH2CH2CH2,-NHCH2,-NHCH2CH2,- NHCH2CH2CH2-。
Step 3: intermediate II and diisocyanate cpd (OCN-R2- NCO), diatomic alcohol compounds (HO-R3- OH) etc. In a solvent, it is reacted with dibutyl tin dilaurate, generates polyurethane hyper-dispersant, reaction equation is as follows:
In formula: M is O or NH;M is 1,2,3 or 4;N is 2 or 3;
R is-OCH2CH2,-OCH2CH2CH2,-NHCH2,-NHCH2CH2,- NHCH2CH2CH2-;
OCN-R2- NCO are as follows: toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, isophorone diisocyanate, six Methylene diisocyanate;
HO-R3- OH are as follows: ethylene glycol, 1,3- propylene glycol, 1,2- propylene glycol, 1,4- butanediol, 1,5- pentanediol, 1,6- oneself Glycol, 1,4- cyclohexanedimethanol, neopentyl glycol.
In the first step reaction, solvent can be water, acetonitrile, acetone, Isosorbide-5-Nitrae-dioxane, n,N-Dimethylformamide (DMF), tetrahydrofuran (THF), DMAC N,N' dimethyl acetamide (DMAC) etc..
The temperature of the first step reaction is 0~5 DEG C.
The molar ratio of trichloro-triazine and sulfamic acid compound or hydroxyl sulfoacid compound is in the first step reaction 1:1。
In the second step reaction, solvent can be acetonitrile, acetone, Isosorbide-5-Nitrae-dioxane, n,N-Dimethylformamide (DMF), tetrahydrofuran (THF), DMAC N,N' dimethyl acetamide (DMAC) etc..
The temperature of the second step reaction is 30~95 DEG C.
In the second step reaction, intermediate I and carbinolamine, ethanol amine, n-propanolamine, ethylene glycol, propylene glycol, Isosorbide-5-Nitrae-ring The molar ratio of own dimethanol is 1:2.
In the third step reaction, solvent can be acetonitrile, acetone, Isosorbide-5-Nitrae-dioxane, ethyl acetate, N, N- dimethyl Formamide (DMF), tetrahydrofuran (THF), DMAC N,N' dimethyl acetamide (DMAC) etc..
In the third step reaction, the amount of the substance of diisocyanate cpd: (amount+binary of the substance of intermediate II The amount of the substance of alcoholic compound)=1:1~1:2.
Embodiment 1
(1) the 3- hydroxy-propanesulfonic acid of 0.1mol is neutralized with sodium hydroxide, prepares 3- hydroxypropionate sodium solid powder.? In four-hole boiling flask, 300mL acetonitrile and 0.1mol Cyanuric Chloride is added, ice salt bath is cooled to 5 DEG C, and side stirring, side slowly adds in batches Enter 3- hydroxypropionate sodium, and control reaction system pH=9 with the acetonitrile solution of a small amount of triethylamine, terminates after reacting 3h, obtain The acetonitrile solution of intermediate I.Intermediate I (1) structural formula is as follows:
(2) ethanol amine 0.2mol is added into the acetonitrile solution (30mL) of intermediate I containing 0.1mol (1), is warming up to 30 DEG C, 2h is reacted, continues to be warming up to 80 DEG C, reacts 3h, obtain the acetonitrile solution of intermediate II.
Intermediate II (1) structural formula is as follows:
(3) isophorone diisocyanate is added into the acetonitrile solution (60mL) of intermediate II containing 0.05mol (1) 0.15mol and ethylene glycol 0.1mol, and a few drop dibutyl tin dilaurates are added, it stirs, is warming up to 80 DEG C, after reacting 3h, rotation Turn evaporation and remove acetonitrile, obtains 1 solid powder of polyurethane hyper-dispersant, structural formula is as follows:
Embodiment 2
(1) ethylenehydrinsulfonic acid of 0.1mol is neutralized with sodium hydroxide, prepares ethylenehydrinsulfonic acid sodium solid powder.At four mouthfuls In flask, 100mLDMF and 0.1mol Cyanuric Chloride is added, ice salt bath is cooled to 5 DEG C, and side stirring, side is slowly added to hydroxyl in batches Ethanesulfonic acid sodium, and reaction system pH=9 is controlled with the DMF solution of a small amount of triethylamine, terminate after reacting 3h, obtains intermediate I DMF solution.Intermediate I (2) structural formula is as follows:
(2) n-propanolamine 0.2mol is added into the DMF solution of intermediate I containing 0.1mol (2), is warming up to 20 DEG C, reaction 2h continues to be warming up to 90 DEG C, reacts 3h, obtain the DMF solution of intermediate II (2).Intermediate II (2) structural formula is as follows:
(3) '-diphenylmethane diisocyanate is added into the DMF solution (60mL) of intermediate II containing 0.2mol (2) 0.15mol and 1,3-PD 0.1mol, and a few drop dibutyl tin dilaurates are added, it stirs, is warming up to 80 DEG C, react 3h Afterwards, rotary evaporation removes DMF, obtains 2 solid powder of polyurethane hyper-dispersant, structural formula is as follows:
Embodiment 3
Operating method such as embodiment 2.For the raw material that first step operation uses for Homotaurine, reaction dissolvent is Isosorbide-5-Nitrae- Dioxane obtains intermediate I (3), and reaction temperature is 0 DEG C;It is Isosorbide-5-Nitrae-cyclohexanedimethanol, reaction dissolvent that second step, which reacts drug, For Isosorbide-5-Nitrae-dioxane, intermediate I (3) and Isosorbide-5-Nitrae-cyclohexanedimethanol molar ratio are 1:2,80 DEG C of reaction temperature;Third step is anti- Answering drug is hexamethylene diisocyanate (0.5mol), second step reaction product intermediate II (3) (0.3mol) and 1,4- ring Own dimethanol (0.3mol), reaction dissolvent are Isosorbide-5-Nitrae-dioxane (500mL), and reaction temperature is 80 DEG C, and final products are poly- ammonia Ester group hyper-dispersant 3, structural formula is as follows:
Embodiment 4
Operating method such as embodiment 2.The raw material that first step operation uses is 3- hydroxy-propanesulfonic acids, reaction dissolvent third Ketone, reaction product are intermediate I (1);It is 1,2-PD that second step, which reacts drug, and reaction dissolvent is acetone, intermediate I (1) It is 1:2 with 1,2-PD molar ratio, this step reaction product is intermediate II (4);It is toluene diisocyanate that third step, which reacts drug, Acid esters (1mol), intermediate II (4) (1mol) and 1,2-PD (0.7mol), reaction dissolvent are acetone, reaction temperature 80 DEG C, final products are polyurethane hyper-dispersant 4, and structural formula is as follows:
Embodiment 5
Operating method such as embodiment 2.For the raw material that first step operation uses for Homotaurine, reaction dissolvent is water, 0 DEG C of reaction temperature, the first step after reaction, be evaporated under reduced pressure remove moisture, obtain intermediate I (3);Second step reacts drug 1,3-PD, reaction dissolvent DMAC obtain intermediate II (5);It is isophorone diisocyanate that third step, which reacts drug, (0.2mol), intermediate II (5) (0.15mol) and neopentyl glycol (0.15mol), reaction dissolvent is DMAC (200mL), final to produce Product are polyurethane hyper-dispersant 5.
Embodiment 6
Operating method such as embodiment 2.For 3- hydroxy-propanesulfonic acid, reaction dissolvent is the raw material that first step operation uses DMAC, obtains intermediate I (1) by 5 DEG C of reaction temperature;It is 1,2-PD that second step, which reacts drug, and reaction dissolvent is acetone, 90 DEG C 3h is reacted, intermediate II (6) are obtained;It is toluene di-isocyanate(TDI) (0.7mol), intermediate II (6) that third step, which reacts drug, (0.3mol) and Isosorbide-5-Nitrae-cyclohexanedimethanol (0.4mol), reaction dissolvent are acetone (300mL), and final products are polyurethane oversubscription Powder 6.
Embodiment 7
Operating method such as embodiment 2.The raw material that first step operation uses is 2- ethylenehydrinsulfonic acids, reaction dissolvent THF, It obtains intermediate I (2);It is Isosorbide-5-Nitrae-cyclohexanedimethanol that second step, which reacts drug, and reaction dissolvent is that THF obtains intermediate II (7);Third step Reaction drug is hexamethylene diisocyanate (1.2mol), intermediate II (7) (1mol) and 1,5-PD (1mol), reaction Solvent is THF, and final products are polyurethane hyper-dispersant 7.
Embodiment 8
Operating method such as embodiment 2.The raw material that first step operation uses is 2- ethylenehydrinsulfonic acids, reaction dissolvent DMF, It obtains intermediate I (2);It is n-propanolamine that second step, which reacts drug, and reaction dissolvent DMF, 40 DEG C of reaction 5h obtain intermediate II (2); Third step react drug be toluene di-isocyanate(TDI) (1mol), intermediate II (2) (0.8mol) and 1,6- hexylene glycol (0.6mol), Reaction dissolvent is DMF (200mL), and 90 DEG C of reaction temperature, final products are polyurethane hyper-dispersant 8.
Embodiment 9
Operating method such as embodiment 2.For the raw material that use of first step operation for 2-aminoethanesulfonic acid, reaction dissolvent is water, 0 DEG C reaction 2h, the first step after reaction, be evaporated under reduced pressure remove moisture, obtain intermediate I (9);It is first that second step, which reacts drug, Hydramine (2mol) and intermediate I (9) (1mol), reaction dissolvent are acetone, and 30 DEG C of reaction 3h obtain intermediate II (9);Third step is anti- Answering drug is '-diphenylmethane diisocyanate (0.1mol), intermediate II (9) (0.05mol) and 1,3-PD (0.075mol), reaction dissolvent are acetone, and 70 DEG C of reaction temperature, final products are polyurethane hyper-dispersant 9.
Embodiment 10
Operating method such as embodiment 2.For the raw material that first step operation uses for 3- hydroxy-propanesulfonic acid, reaction dissolvent is Isosorbide-5-Nitrae- Dioxane;It is ethanol amine, reaction dissolvent DMAC that second step, which reacts drug,;It is two isocyanide of isophorone that third step, which reacts drug, Acid esters (3mol), second step product (2.5mol) and 1,2-PD (1.5mol), reaction dissolvent are acetone (2000mL), reaction 75 DEG C of temperature, final products are polyurethane hyper-dispersant 10.
Test case 1
Water polyurethane base hyper-dispersant, organic pigment and water obtained are weighed according to the proportion of table 1 and concussion is added Cup is uniformly mixed, after vibrating 3h on the oscillator under room temperature, then phases such as the viscosity of test sample, tinting strength, tinting power and covering power Performance parameter is closed, test result is shown in Table 2.
1 hyper-dispersant test formulations of table
2 hyper-dispersant of table preparation washing color paste viscosity (25 DEG C)

Claims (9)

1. a kind of polyurethane based water-based coating hyper-dispersant, which is characterized in that the hyper-dispersant is prepared from the following raw materials: three Chloro-s-triazine, sulfoacid compound, diisocyanate cpd, diatomic alcohol compounds, alcohol amine compound, wherein trichloro-triazine It is 1:1 with the molar ratio of sulfoacid compound, the molar ratio of trichloro-triazine and diisocyanate cpd is 1:1 ~ 2:1.
2. a kind of polyurethane based water-based coating hyper-dispersant according to claim 1, which is characterized in that described sulfonated Closing object is sulfamic acid compound or hydroxyl sulfoacid compound;The sulfamic acid compound includes tarine, 3- amino Propane sulfonic acid;The hydroxyl sulfoacid compound includes ethylenehydrinsulfonic acid, 3- hydroxy-propanesulfonic acid.
3. a kind of polyurethane based water-based coating hyper-dispersant according to claim 1, which is characterized in that two isocyanide Ester compound is toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, isophorone diisocyanate or hexa-methylene two Isocyanates.
4. a kind of polyurethane based water-based coating hyper-dispersant according to claim 1, which is characterized in that the dihydric alcohol Compound is ethylene glycol, 1,3- propylene glycol, 1,2- propylene glycol, 1,4- butanediol, 1,5- pentanediol, 1,6-HD, 1,4- ring Own dimethanol or neopentyl glycol.
5. a kind of polyurethane based water-based coating hyper-dispersant according to claim 1, which is characterized in that the alcohol amination Conjunction object is carbinolamine, ethanol amine, n-propanolamine or n-butanol amine.
6. a kind of preparation method of polyurethane based water-based coating hyper-dispersant described in claim 1, which is characterized in that including Following steps:
In a solvent, trichloro-triazine reacts step 1) with sulfoacid compound, and 2- is made and replaces -4,6- dichloro s-triazine chemical combination Object, as intermediate I;
Intermediate I described in step 2 step 1), reacts with diatomic alcohol compounds or alcohol amine compound in a solvent, and dihydroxy is made Compound, as intermediate II;
Intermediate II described in step 3) step 2 and diisocyanate cpd and diatomic alcohol compounds in a solvent, with two laurels Sour dibutyl tin reaction, ultimately produces the polyurethane based water-based coating hyper-dispersant.
7. a kind of preparation method of polyurethane based water-based coating hyper-dispersant according to claim 6, which is characterized in that Solvent described in step 1) is water, acetonitrile, acetone, 1,4- dioxane, N,N-dimethylformamide, tetrahydrofuran or N, N- diformazan Yl acetamide;
Solvent described in step 2 is acetonitrile, acetone, 1,4- dioxane, N,N-dimethylformamide, tetrahydrofuran or N, N- bis- Methylacetamide;
Solvent described in step 3) is acetonitrile, acetone, 1,4- dioxane, ethyl acetate, N,N-dimethylformamide, tetrahydrofuran Or DMAC N,N' dimethyl acetamide.
8. a kind of preparation method of polyurethane based water-based coating hyper-dispersant according to claim 6, which is characterized in that In step 2, intermediate I is 1:2 with the molar ratio of diatomic alcohol compounds or alcohol amine compound;In step 3), diisocyanate esterification Close the amount of the substance of object: (amount of amount+diatomic alcohol compounds substance of the substance of intermediate II)=1:1 ~ 1:2.
9. a kind of preparation method of polyurethane based water-based coating hyper-dispersant according to claim 6, which is characterized in that The reaction temperature of step 1) is 0 ~ 5 DEG C;The reaction temperature of step 2 is 30 ~ 95 DEG C.
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