CN104403077A - Preparation method and applications of aqueous polyurethane emulsion - Google Patents
Preparation method and applications of aqueous polyurethane emulsion Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
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- C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
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- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention discloses a preparation method and applications of an aqueous polyurethane emulsion. The aqueous polyurethane emulsion is mainly composed of the following components in parts by weight: 50 to 100 parts of composite polyol with a carbonate structure and an ether structure, 0.05 to 0.2 part of catalyst, 10 to 80 parts of isocyanate, 1 to 12 parts of crosslinking agent, 2 to 10 parts of hydrophilic chain extender, 0 to 15 parts of non-hydrophilic chain extender, 30 to 100 parts of acetone, 1 to 12 parts of neutralizer, 150 to 400 parts of deionized water, 0 to 25 parts of filling materials, 0 to 30 parts of pigment, and 0 to 15 parts of auxiliary agents. The hard paint has the characteristics of low film-forming temperature (0 DEG C or more), quick drying, strong adhesive force, scratch resistance, and impact resistance, has a pencil hardness of 2H, can be used to paint materials such as metal, woodware, glass, plastic, leather, and the like, and has the advantages of wide application range, high performance-cost ratio, and vase market prospect.
Description
Technical field
The present invention relates to a kind of preparation method of aqueous polyurethane emulsion and the application in paint field thereof, belong to aqueous polyurethane coating field.
Technical background
Aqueous polyurethane is the polyurethane system that instead of solvent using water as dispersion medium, not only has extremely low VOC, and not containing free-NCO, along with people are to the attention of environmental protection, aqueous polyurethane becomes an important directions of urethane development at present.Aqueous polyurethane, for the preparation of coating, significantly can reduce solvent in coating and, to the injury of human body, reduce cost, and has the advantages such as damage resistant, wear-resisting, strong adhesion.Therefore, aqueous polyurethane is more and more favored for coating.
The self-drying aqueous urethane of single-component is applied to the few of rigid coating in the market, and the aqueous polyurethane hardness mainly owing to preparing with polyethers is nowhere near, and general its hydrolytic resistance of polyester type aqueous polyurethane is poor, and the shelf lives is shorter.Can aqueous polyurethane self-drying paint on woodenware, metal, glass, hard leather, general employing polycarbonate polyol just can reach corresponding performance, but because polycarbonate polyol price is high, normal temperature is difficult to film forming, sticking power is also poor, causes the rigid emulsion of aqueous polyurethane to lose competitive edge.What the present invention adopted is a kind of NEW TYPE OF COMPOSITE polyvalent alcohol, and its structural carbonate is one or more mixed structure of poly (propylene carbonate) structure, polyethylencarbonate; Described polyether segment is one or both mixed structure of polyoxyethylene, polyoxytrimethylene; Described polycarbonate structure and polyether structure are all generated together with in synthesis of epoxy compounds process by carbonic acid gas; This novel polyols had both had snappiness and the water tolerance of polyethers, had again rigidity and the hydrolytic resistance of polycarbonate polyol; The rigid emulsion of the aqueous polyurethane prepared with this polyvalent alcohol, the characteristic that existing height is hard, has impact-resistant characteristic again, and water-fast, damage resistant, wear-resisting, and the shelf lives is long, it is crucial that this product price is cheap, cost performance is high.
In patent before, application number is refer to aqueous polyurethane coating prepared by a kind of poly (propylene carbonate) polyvalent alcohol in the patent of CN201010565904.0, but its poor-performing, apply also unclear, prepare industrial coating and be weak; Application number is a kind of aqueous polyurethane frie retardant coating that CN201110180540.9 refer to a kind of poly (propylene carbonate) polyvalent alcohol and prepares; Application number is the Aqueous Polyurethane Adhesives that CN201110180538.1 refer to a kind of poly (propylene carbonate) polyvalent alcohol and prepares; Application number is the preparation disclosing a kind of interior cross-linking type polypropylene carbonate waterborne polyurethane emulsion in CN201310347297.4 patent, improves to some extent to performance, but is used in rigid coating and still has big gap; Therefore, prepare a kind of rigid coating of aqueous polyurethane that can meet industrial requirement and there is very real meaning.
Summary of the invention
In order to make up the blank of prior art and overcome the shortcoming of prior art, the object of the invention is to provide a kind of preparation method of aqueous polyurethane emulsion and the application in water-borne coatings especially high rigidity water-borne coatings thereof.
In order to achieve the above object, the technical solution used in the present invention is: a kind of preparation method of aqueous polyurethane emulsion, by mass fraction proportioning and operation steps: the first step, by the Pluronic polyols 50 ~ 100 parts containing polycarbonate structure and polyether structure, catalyzer 0.05 ~ 0.2 part adds in reactor, be warming up to 50 ~ 60 DEG C to stir, add isocyanic ester 10 ~ 80 parts, be warming up to 70 ~ 85 DEG C of reactions 2 ~ 4 hours, add non-hydrophilic alcohols chainextender 0 ~ 30 part, 80 ~ 90 DEG C are reacted 1 ~ 2 hour, add hydrophilic chain extender 2 ~ 10 parts, 80 ~ 90 DEG C are reacted 1 ~ 3 hour, be cooled to 60 ~ 70 DEG C, add linking agent 2 ~ 10 parts reaction 1 ~ 2 hour, be cooled to 50 ~ 60 DEG C, add 10 ~ 100 parts, acetone, neutralizing agent 1 ~ 16 part reaction 10 ~ 30 minutes, add deionized water 150 ~ 800 parts, high speed dispersion 2 ~ 30 minutes, add non-hydrophilic amine chain extender 0 ~ 20 part, high speed dispersion 5-40 minute, discharging, to precipitation still, is warming up to 50 ~ 60 DEG C, maintain more than vacuum tightness 0.09Mpa and remove acetone, filter discharging and obtain aqueous polyurethane emulsion, second step, adds 5 ~ 30 parts of deionized waters in mixer, adds auxiliary agent 0 ~ 10 part, stirs, and adds required filler 0 ~ 25 part, adds pigment 0 ~ 30 part and stirs, add aqueous polyurethane emulsion 60 ~ 100 parts prepared by the first step again, go in dispersion bucket or shredder, stirring, dispersion grinding 40 ~ 60 minutes, add auxiliary agent 0 ~ 5 part, stir 15 ~ 30 minutes, filters discharging and be packaged to be aqueous polyurethane coating.
Described a kind of Pluronic polyols, containing structural carbonate and ether structure in its structure, its molecular structural formula is:
;
Wherein: R '=H or CH3, f=2 or 3, x >=1, y >=1;
Structural carbonate in Pluronic polyols is one or more mixed structure of poly (propylene carbonate) structure, polyethylencarbonate; Described polyether structure is one or both mixed structure of polyoxyethylene, polyoxytrimethylene; Described polycarbonate structure and polyether structure are all generated together with in synthesis of epoxy compounds process by carbonic acid gas; Molar percentage >=30% shared by polycarbonate structure in described Pluronic polyols; The molecular-weight average of described Pluronic polyols is between 500 ~ 5000.
Described isocyanic ester includes but not limited to: tolylene diisocyanate (TDI), in diphenylmethanediisocyanate (MDI), isophorone diisocyanate (IPDI), 1,6-hexyl diisocyanate (HDI), dicyclohexyl methane diisocyanate (HMDI) one or more.
Described catalyzer is dibutyl tin laurate, stannous octoate, organo-bismuth, wherein one or more.
Described non-hydrophilic chainextender has alcohols and amine, include but not limited to: ethylene glycol, methyl propanediol, 1,2-propylene glycol, 1, one or more in 4-butyleneglycol, dipropylene glycol, 1,6-hexylene glycol, neopentyl glycol, quadrol, propylene diamine, Di-n-Butyl Amine, trimethylhexane diamine, isophorone diamine, hydrazine hydrate.
Described hydrophilic chain extender includes but not limited to: dimethylol propionic acid, dimethylolpropionic acid or N-(2-amino-ethyl)-2-aminoethane sulphonic acid sodium (AAS salt), 2, one or more in 4-diamino benzene sulfonic acid, 2-sodium sulfonate-BDO.
Described linking agent includes but not limited to: one or more in TriMethylolPropane(TMP), trolamine, diethylenetriamine.
Described neutralizing agent comprises: the one in ammoniacal liquor, triethylamine, trolamine, potassium hydroxide, sodium hydroxide.
Described filler includes but not limited to: one or more in titanium dioxide, talcum powder, diatomite, kaolin, water-ground limestone, light calcium carbonate, polynite.
Described pigment is: water-soluble or aqueous dispersion type toner and mill base.
Described auxiliary agent includes but not limited to: flow agent, wetting agent, defoamer, dispersion agent, the agent of anti-sudden strain of a muscle rust, photostabilizer, oxidation inhibitor, thickening material, one or more in sanitas.
Being applied in waterborne metallic paint, water-borne wood coating, aqueous glass paint, water-based hard leather coating of aqueous polyurethane emulsion.
The present invention has following advantage: the aqueous polyurethane emulsion obtained can prepare the water-borne coatings of high adhesive force, good shock-resistance is possessed while high rigidity, stability in storage has been taken into account under the prerequisite of water-tolerant, there is film formation at low temp characteristic, the features such as fast drying, be applied in waterborne metallic paint, water-borne wood coating, aqueous glass paint, water-based hard leather coating and possess good over-all properties, there is high cost performance.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.Further proof and describe technical scheme of the present invention, following embodiment is only to understand the present invention better, and not as limitation of the present invention.
Embodiment 1
The first step, by sub-for the polycarbonate Pluronic polyols that propyl ester structure accounts for molar percentage 55%, polyoxytrimethylene ether structure accounts for 45% molar percentage, (molecular weight is 2500, hydroxyl value 45mg(KOH)/g) 200Kg and stannous octoate 0.4Kg joins in reactor, stirs at 50 DEG C; Add tolylene diisocyanate 136Kg, be warmed up to 70 DEG C, react 2 hours; Add BDO 30Kg, react 1 hour at 80 DEG C; Add dimethylol propionic acid 20 Kg, react 2 hours at 80 DEG C; Be cooled to 60 DEG C, add TriMethylolPropane(TMP) 5 Kg and add acetone 40Kg and react 1.5 hours; Be cooled to 50 DEG C, add triethylamine 15Kg, react 15 minutes; Add water 700Kg, high speed dispersion 20 minutes; The emulsion obtained is transferred in precipitation still, is warming up to 50 DEG C, maintains vacuum tightness 0.09Mpa and removes acetone; Filter the aqueous polyurethane emulsion A that discharging obtains semi-transparent zone blue light.
Second step, removing ionized water 10Kg adds in mixer, add wetting agent 0.3 Kg, PH conditioning agent 0.2 Kg, defoamer 0.3 Kg, flow agent 0.2 Kg dispersion while stirring to join after stirring in dispersion bucket, add above-mentioned aqueous polyurethane emulsion A 88.5Kg, stir 40 minutes, add the thickening material of 0.5 Kg while stirring, stir 10 minutes, filter discharging, obtain highlight water-based urethane woodenware lacquer A.
After spraying aqueous polyurethane wood lacquer A, test according to the method for GB " GB/T 23999-2009 indoor decorating use woodwork coating ", result is as follows:
。
Embodiment 2
The first step, by sub-for the polycarbonate Pluronic polyols that propyl ester structure accounts for molar percentage 70%, polyoxytrimethylene ether structure accounts for 30% molar percentage, (molecular weight is 2000, hydroxyl value 56mg(KOH)/g) 200Kg and dibutyl tin laurate 0.2Kg joins in reactor, stirs at 60 DEG C; Add isoflurane chalcone diisocyanate 179Kg, be warmed up to 75 DEG C, react 2 hours; Add glycol ether 38Kg, react 1 hour at 80 DEG C; Add dimethylolpropionic acid 22 Kg, react 2 hours at 80 DEG C; Be cooled to 60 DEG C, add TriMethylolPropane(TMP) 3 Kg and add acetone 30Kg and react 2 hours; Be cooled to 40 DEG C, add triethylamine 16.7Kg, react 15 minutes; Add water 750Kg, high speed dispersion 10 minutes; Add quadrol 10Kg, high speed dispersion 30 minutes, the emulsion obtained is transferred in precipitation still, is warming up to 55 DEG C, maintains vacuum tightness 0.09Mpa and removes acetone; Filter the aqueous polyurethane emulsion B that discharging obtains semi-transparent zone blue light.
Second step, removing ionized water 10Kg adds in mixer, add while stirring wetting agent 0.2 Kg, PH conditioning agent 0.2 Kg, defoamer 0.3 Kg, flow agent 0.2 Kg, fine flour slurry 24Kg dispersion stir after join dispersion bucket in, add the above-mentioned aqueous polyurethane emulsion B of 64 Kg, stir 40 minutes, add the thickening material of 0.7 Kg while stirring, stir 10 minutes, filter discharging, obtain half sub-light aqueous polyurethane woodenware white finish paint B.
After spraying aqueous polyurethane wood lacquer B, test according to the method for GB " GB/T 23999-2009 indoor decorating use woodwork coating ", result is as follows:
。
Embodiment 3
The first step, by sub-for the polycarbonate Pluronic polyols that propyl ester structure accounts for molar percentage 63%, polyoxytrimethylene ether structure accounts for 37% molar percentage, (molecular weight is 3000, hydroxyl value 38mg(KOH)/g) 200Kg and dibutyl tin laurate 0.1Kg, stannous octoate 0.1Kg, join in reactor, stir at 60 DEG C; Add isoflurane chalcone diisocyanate 162Kg, be warmed up to 80 DEG C, react 1 hour; Add ethylene glycol 26Kg, react 1 hour at 80 DEG C; Add dimethylol propionic acid 20 Kg, react 2 hours at 80 DEG C; Be cooled to 50 DEG C, add diethylenetriamine 2 Kg and add acetone 30Kg and react 1 hour; Be cooled to 40 DEG C, add triethylamine 15Kg, react 15 minutes; Add water 761Kg, high speed dispersion 10 minutes; Add different fluorine that ketone diamines 12Kg, high speed dispersion 30 minutes, the emulsion obtained is transferred in precipitation still, is warming up to 55 DEG C, maintains vacuum tightness 0.09Mpa and removes acetone; Filter the aqueous polyurethane emulsion C that discharging obtains semi-transparent zone blue light.
Second step, removing ionized water 10Kg adds in mixer, add while stirring wetting agent 0.2 Kg, PH conditioning agent 0.2 Kg, defoamer 0.3 Kg, flow agent 0.2 Kg, fine flour slurry 25.4Kg dispersion stir after join dispersion bucket in, add the above-mentioned aqueous polyurethane emulsion C of 61Kg, stir 40 minutes, add the anti-thickening material dodging rust agent 2 Kg and 0.7 Kg while stirring, stir 10 minutes, filter discharging, obtain light aqueous polyurethane metal finish paint C.
After spraying aqueous polyurethane metal finish paint C, carry out performance test, result is as follows:
。
Embodiment 4
The first step, by sub-for the polycarbonate Pluronic polyols that propyl ester structure accounts for molar percentage 55%, polyoxytrimethylene ether structure accounts for 45% molar percentage, (molecular weight is 2500, hydroxyl value 45mg(KOH)/g) 200Kg and stannous octoate 0.1Kg, join in reactor, stir at 50 DEG C; Add tolylene diisocyanate 82Kg, be warmed up to 75 DEG C, react 1 hour; Add 1,6-hexylene glycol 18Kg, react 1 hour at 80 DEG C; Add dimethylol propionic acid 12 Kg, react 2 hours at 80 DEG C; Be cooled to 50 DEG C, add TriMethylolPropane(TMP) 3.5 Kg and add acetone 40Kg and react 1 hour; Be cooled to 40 DEG C, add triethylamine 9.5Kg, react 10 minutes; Add water 572Kg, high speed dispersion 5 minutes; Add hydrazine hydrate 6Kg, high speed dispersion 30 minutes, the emulsion obtained is transferred in precipitation still, is warming up to 50 DEG C, maintains vacuum tightness 0.09Mpa and removes acetone; Filter the aqueous polyurethane emulsion D that discharging obtains semi-transparent zone blue light.
Second step, removing ionized water 10Kg adds in mixer, add wetting agent 0.3 Kg, PH conditioning agent 0.2 Kg, defoamer 0.3 Kg, flow agent 0.2 Kg, dispersion agent 0.5 Kg zinc phosphate 5Kg, red iron oxide 3 Kg, talcum powder 15Kg dispersion while stirring to join after stirring in dispersion bucket, add the above-mentioned aqueous polyurethane emulsion D of 63 Kg, stir 40 minutes, add the anti-thickening material dodging rust agent 2 Kg and 0.5 Kg while stirring, stir 10 minutes, filter discharging, obtain aqueous polyurethane antirust iron oxide red metal primer D.
After spraying aqueous polyurethane antirust iron oxide red metal primer D, carry out performance test, result is as follows:
。
Embodiment 5
The first step, by sub-for the polycarbonate Pluronic polyols that propyl ester structure accounts for molar percentage 70%, polyoxytrimethylene ether structure accounts for 30% molar percentage, (molecular weight is 2000, hydroxyl value 56mg(KOH)/g) 200Kg and dibutyl tin laurate 0.1Kg, stannous octoate 0.1kg, join in reactor, stir at 60 DEG C; Add 1,6-hexyl diisocyanate 210Kg, be warmed up to 80 DEG C, react 2 hours; Add neopentyl glycol 43.4Kg, react 1 hour at 80 DEG C; Add dimethylol propionic acid 24.8 Kg, react 3 hours at 70 DEG C; Be cooled to 60 DEG C, add TriMethylolPropane(TMP) 1Kg and add acetone 20Kg and react 2 hours; Be cooled to 40 DEG C, add triethylamine 18.7Kg, react 15 minutes; Add water 700Kg, high speed dispersion 15 minutes; Add triethylene diamine 5Kg, high speed dispersion 30 minutes, the emulsion obtained is transferred in precipitation still, is warming up to 55 DEG C, maintains vacuum tightness 0.09Mpa and removes acetone; Filter the aqueous polyurethane emulsion E that discharging obtains semi-transparent zone blue light.
Second step, removing ionized water 8Kg adds in mixer, add while stirring wetting agent 0.2 Kg, PH conditioning agent 0.2 Kg, defoamer 0.3 Kg, flow agent 0.2 Kg dispersion stir after, add the above-mentioned aqueous polyurethane emulsion E of 90 Kg, stir 40 minutes, add the thickening material of 0.7 Kg while stirring, stir 10 minutes, filter discharging, obtain waterborne polyurethane glass varnish E.
After spraying aqueous polyurethane wood lacquer E, test, result is as follows:
。
Claims (10)
1. the preparation method of an aqueous polyurethane emulsion, it is characterized in that following by mass fraction proportioning and operation steps: the first step, Pluronic polyols 50 ~ 100 parts containing polycarbonate structure and polyether structure, catalyzer 0.05 ~ 0.2 part are added in reactor, be warming up to 50 ~ 60 DEG C to stir, add isocyanic ester 10 ~ 80 parts, be warming up to 70 ~ 85 DEG C of reactions 2 ~ 4 hours, add non-hydrophilic alcohols chainextender 0 ~ 30 part, 80 ~ 90 DEG C are reacted 1 ~ 2 hour, add hydrophilic chain extender 2 ~ 10 parts, 80 ~ 90 DEG C are reacted 1 ~ 3 hour, are cooled to 60 ~ 70 DEG C; Add linking agent 2 ~ 10 parts reaction 1 ~ 2 hour, be cooled to 50 ~ 60 DEG C, add 10 ~ 100 parts, acetone, neutralizing agent 1 ~ 16 part reaction 10 ~ 30 minutes, add deionized water 150 ~ 800 parts, high speed dispersion 2 ~ 30 minutes, add non-hydrophilic amine chain extender 0 ~ 20 part, high speed dispersion 5-40 minute, discharging, to precipitation still, is warming up to 50 ~ 60 DEG C, maintain more than vacuum tightness 0.09Mpa and remove acetone, filter discharging and obtain aqueous polyurethane emulsion; Second step, adds 5 ~ 30 parts of deionized waters in mixer, adds auxiliary agent 0 ~ 10 part, stirs, and adds required filler 0 ~ 25 part, adds pigment 0 ~ 30 part and stirs; Add aqueous polyurethane emulsion 60 ~ 100 parts prepared by the first step again, go in dispersion bucket or shredder, stirring, dispersion grinding 40 ~ 60 minutes, add auxiliary agent 0 ~ 5 part, stir 15 ~ 30 minutes, filters discharging and be packaged to be aqueous polyurethane coating.
2. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, is characterized in that: described a kind of Pluronic polyols, and containing polycarbonate structure and polyether structure in its structure, its molecular structural formula is:
;
Wherein: R '=H or CH3, f=2 or 3, x >=1, y >=1;
Polycarbonate structure in Pluronic polyols is one or more mixed structure of poly (propylene carbonate) structure, polyethylencarbonate; Described polyether structure is one or both mixed structure of polyoxyethylene, polyoxytrimethylene; Described polycarbonate structure and polyether structure are all generated together with in synthesis of epoxy compounds process by carbonic acid gas; Molar percentage >=30% shared by polycarbonate structure in described Pluronic polyols; The molecular-weight average of described Pluronic polyols is between 500 ~ 5000.
3. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, it is characterized in that: described isocyanic ester comprises: tolylene diisocyanate (TDI), in diphenylmethanediisocyanate (MDI), isophorone diisocyanate (IPDI), 1,6-hexyl diisocyanate (HDI), dicyclohexyl methane diisocyanate (HMDI) one or more.
4. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, is characterized in that: described catalyzer is one or more in dibutyl tin laurate, stannous octoate, organo-bismuth.
5. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, it is characterized in that: described non-hydrophilic chainextender has alcohols and amine, comprise: ethylene glycol, methyl propanediol, 1,2-propylene glycol, 1, one or more in 4-butyleneglycol, dipropylene glycol, 1,6-hexylene glycol, neopentyl glycol, quadrol, propylene diamine, Di-n-Butyl Amine, trimethylhexane diamine, isophorone diamine, hydrazine hydrate.
6. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, it is characterized in that: described hydrophilic chain extender comprises: dimethylol propionic acid, dimethylolpropionic acid or N-(2-amino-ethyl)-2-aminoethane sulphonic acid sodium (AAS salt), 2, one or more in 4-diamino benzene sulfonic acid, 2-sodium sulfonate-BDO.
7. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, is characterized in that: described linking agent includes but not limited to: one or more in TriMethylolPropane(TMP), trolamine, diethylenetriamine.
8. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, is characterized in that: described neutralizing agent comprises: the one in ammoniacal liquor, triethylamine, trolamine, potassium hydroxide, sodium hydroxide.
9. the preparation method of a kind of aqueous polyurethane emulsion according to claim 1, is characterized in that: described filler comprises: one or more in titanium dioxide, talcum powder, diatomite, kaolin, water-ground limestone, light calcium carbonate, polynite; Described pigment is water-soluble or aqueous dispersion type toner and mill base; Described auxiliary agent comprises: flow agent, wetting agent, defoamer, dispersion agent, the agent of anti-sudden strain of a muscle rust, photostabilizer, oxidation inhibitor, thickening material, one or more in sanitas.
10. an application for aqueous polyurethane emulsion, in waterborne metallic paint, water-borne wood coating, aqueous glass paint, water-based hard leather coating.
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| PCT/CN2015/083566 WO2016070644A1 (en) | 2014-11-07 | 2015-07-08 | Preparation method for aqueous polyurethane emulsion and use thereof |
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