CN102363700B - Aqueous dual-component bright top finish and its preparation method - Google Patents
Aqueous dual-component bright top finish and its preparation method Download PDFInfo
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- CN102363700B CN102363700B CN 201110181652 CN201110181652A CN102363700B CN 102363700 B CN102363700 B CN 102363700B CN 201110181652 CN201110181652 CN 201110181652 CN 201110181652 A CN201110181652 A CN 201110181652A CN 102363700 B CN102363700 B CN 102363700B
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Abstract
The invention discloses an aqueous dual-component bright top finish and its preparation method and belongs to the field of paints. The aqueous dual-component bright top finish is made from a component A and a component B, wherein the component A contains: by weight, 70-80 parts of polyacrylic acid polyol, 0.1-0.5 part of a levelling agent, 0.1-0.5 part of a pH regulator, 0.1-0.5 part of an antifoaming agent, 0.1-2.0 parts of a film-forming additive and 1.0-5.0 parts of water; the component B is anionic modified HDI polyisocyanate; and the weight ratio of the component A to the component B is 1: 0.2-0.3. The aqueous dual-component bright top finish provided by the invention has excellent luster and appearance, excellent antifouling property and chemical resistance, will not become yellow, has antirust property and high temperature resistance, and can be constructed with other paints such as an emulsion paint and the like.
Description
Technical field
The invention belongs to paint field, be specifically related to full light clear finish of a kind of aqueous dual-component and preparation method thereof.
Background technology
Various coating types on the market are various now, mainly are divided into organic coating and inorganic paint, and organic coating is divided into organic solvent type coating and organic water-borne coatings again according to the solvent difference of using.Organic solvent type coating is because the VOC height, can not satisfy that people strengthen day by day to environmental protection requirement.
Organic water-borne coatings, being water-borne coatings, becoming the focus of research now day by day, is the aqueous woodware paint of main component with vinylformic acid, principal feature is that sticking power is good, can not deepen the color of woodenware, but wear-resisting and anti-chemical is relatively poor, hardness of paint film is softer, the examination of pencil rule is HB, fullness ratio is relatively poor, and over-all properties is general, and construction easily produces defective.
Existing coating causes easily that paint film is inhomogeneous, degradation after for some time, do not have lacquer such as sticking power sick, and stain resistance and chemical moral character are poor, easily poor, the non-refractory of xanthochromia, antirust ability etc.
Summary of the invention
The technical problem to be solved in the present invention is that coating causes easily that paint film is inhomogeneous, degradation after for some time, do not have lacquer such as sticking power sick in the prior art, and stain resistance and chemical moral character are poor, easily the problem of poor, the non-refractory of xanthochromia, antirust ability.
The technical scheme that the present invention solves this technical problem is: the full light clear finish of aqueous dual-component, it is made of component A and B component, the weight proportion of described component A is: 70~80 parts of polyacrylic acid polyvalent alcohols, 0.1~0.5 part of flow agent, 0.1~0.5 part of pH regulator agent, 0.1~0.5 part of defoamer, 0.1~2.0 part of film coalescence aid, 1.0~5.0 parts in water; Described B component is anion-modified HDI polyisocyanates, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.2~0.3.
Wherein, in the weight proportion of component A described above, the polyacrylic acid polyvalent alcohol is 75 parts, and flow agent is 0.3 part, and the pH regulator agent is 0.3 part, and defoamer is 0.3 part, and film coalescence aid is 1 part, and water is 0.3 part.
Wherein, the weight ratio of component A described above and B component is 1 ︰ 0.25.
Wherein, pH regulator agent described above is among the AP-95 and auxiliary agent, the organic amine that it is made up of hydroxyl and amido.
Wherein, film coalescence aid described above is the dipropylene glycol butyl ether.
Wherein, the anion-modified HDI polyisocyanates described above Bayhydur3100 that is Bayer.
The present invention also provides the preparation method of the full light clear finish of a kind of aqueous dual-component, and it may further comprise the steps:
A, in container, add 70~80 parts of polyacrylic acid polyvalent alcohols, 0.1~0.5 part of flow agent, 0.1~0.5 part of pH regulator agent, 0.1~0.5 part of defoamer, 0.1~2.0 part of film coalescence aid successively by weight, stir, 1.0~5.0 parts of cleaning equipments of water and adjustment viscosity are filtered and are obtained component A.
B, component A and B component are added the water allotment evenly by weight 1 ︰ 0.2~0.3, get product, described B component is anion-modified HDI polyisocyanates.
Wherein, the rotating speed of stirring described above is 600~800 rev/mins.
Wherein, adjustment viscosity described above refers to adjust viscosity to 120~130KU.
The present invention is to be the coating of solvent or dispersion medium with water, and it has important environment protection significance, asepsis environment-protecting, and hazardous solvent such as containing benezene does not contain free TDI, by the invisible transformation of solvent-borne type PU hydrotropisms PU.
The present invention adopts polyacrylic acid polyvalent alcohol and polyisocyanates to send out through chemically crosslinked and answers, and generates a kind of high performance polyether polyols with reduced unsaturation.Solved polyacrylic acid polyvalent alcohol and the perfect emulsification of anion-modified HDI polyisocyanates under low-shearing power, be easy to mix; Solved owing to the emulsifying agent of bonding not moves in coating and caused that paint film is inhomogeneous, degradation after for some time, do not had lacquer such as sticking power sick, guaranteed that the emulsifying agent group is connected on the polymer chain and evenly distributes, and makes coating have permanent stability.
The present invention has excellent gloss and outward appearance, and stain resistance and chemical moral character are excellent, xanthochromia, antirust, high temperature resistant not, can with other paint construction simultaneously such as emulsion paint.
Embodiment
In the following example, the polyacrylic acid polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, and the pH regulator agent is among the AP-95 of the Dow Chemical Company and auxiliary agent, and film coalescence aid adopts the dipropylene glycol butyl ether.
Embodiment 1
A, add polyacrylic acid polyvalent alcohol 70Kg, flow agent (the Troysol LAC of U.S. Troy chemical company) 0.1 Kg part, pH regulator agent 0.1 Kg, defoamer (BYK 028 of German Bi Ke) 0.1 Kg, film coalescence aid 0.1 Kg successively at stirred vessel, under 600 rev/mins of stirrings, stir, water 1.0 Kg cleaning equipments and adjustment viscosity are filtered and are obtained component A to 120KU.
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.2 ︰ 0.3 gets product, and described B component is anion-modified HDI polyisocyanates.
Embodiment 2
A, add polyacrylic acid polyvalent alcohol 80 Kg, flow agent (BYK346 of German Bi Ke) 0.5 Kg, pH regulator agent 0.5 Kg, defoamer (BYK 028 of German Bi Ke) 0.5 Kg, film coalescence aid 2.0 Kg successively at stirred vessel, under 800 rev/mins of stirrings, stir, water 5.0 Kg cleaning equipments and adjustment viscosity are filtered and are obtained component A to 130KU.
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.3 ︰ 0.5 gets product, and described B component is anion-modified HDI polyisocyanates.
Embodiment 3
A, add polyacrylic acid polyvalent alcohol 75Kg, flow agent (BYK 346 of German Bi Ke) 0.3 Kg, pH regulator agent 0.3 Kg, defoamer (the Tego 902W of Di Gao company) 0.3 Kg, film coalescence aid 1 Kg successively at stirred vessel, under 700 rev/mins of stirrings, stir, water 3 Kg cleaning equipments and adjustment viscosity are filtered and are obtained component A to 125KU.
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.4 gets product, and described B component is anion-modified HDI polyisocyanates.
Embodiment 4
A, add polyacrylic acid polyvalent alcohol 77 Kg, flow agent (BYK 346 of German Bi Ke) 0.25 Kg, pH regulator agent 0.2 Kg, defoamer (EFKA 2035 of EFKA company) 0.2 Kg, film coalescence aid 1.8 Kg successively at stirred vessel, under 750 rev/mins of stirrings, stir, water 2 Kg cleaning equipments and adjustment viscosity are filtered and are obtained component A to 127KU.
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.3 gets product, and described B component is anion-modified HDI polyisocyanates.
Embodiment 5
A, add polyacrylic acid polyvalent alcohol 72Kg, flow agent (BYK 346 of German Bi Ke) 0.4 Kg, pH regulator agent 0.2 Kg, defoamer (BYK 028 of German Bi Ke) 0.4 Kg, film coalescence aid 0.9 Kg successively at stirred vessel, under 650 rev/mins of stirrings, stir, water 4 Kg cleaning equipments and adjustment viscosity are filtered and are obtained component A.
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.35 gets product, and described B component is anion-modified HDI polyisocyanates.
Each embodiment product parameters performance table of table 1:
Test event | Solvent-borne type | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
Paint film appearance | Smooth smooth | Smooth smooth | Smooth smooth | Smooth smooth | Smooth smooth | Smooth smooth |
The feature of environmental protection | Contain hazardous solvents such as benzene | Do not contain hazardous solvents such as benzene | Do not contain hazardous solvents such as benzene | Do not contain hazardous solvents such as benzene | Do not contain hazardous solvents such as benzene | Do not contain hazardous solvents such as benzene |
Free TDI | Contain | Do not contain | Do not contain | Do not contain | Do not contain | Do not contain |
Sticking power | 0 grade | 0 grade | 0 grade | 0 grade | 0 grade | 0 grade |
Pencil hardness | H | H | H | H | H | H |
Chemical-resistant | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
Levelling property | Excellent | Generally | Can accept | Excellent | Excellent | Excellent |
Defoaming | Excellent | Excellent | Generally | Generally | Excellent | Can accept |
Surface drying (min) | 10-20 | 15 | 16 | 15 | 17 | 13 |
Tack-free (h) | 2-4 | 3 | 3 | 3 | 3 | 3 |
Gloss | ≥90 | 95 | 96 | 93 | 98 | 92 |
VOC(g/l) | Less than 580 | <200 | <200 | <200 | <200 | <200 |
Application property | Easily | Easily | Easily | Easily | Easily | Easily |
As seen from Table 1, product VOC content of the present invention is starkly lower than solvent type lacquer, and does not contain benzene and free TDI, environmental protection more, and other indexs also are equal to solvent-borne type.
Claims (8)
1. the full light clear finish of aqueous dual-component, it is characterized in that: it is made of component A and B component, and described component A is: polyacrylic acid polyvalent alcohol 75Kg, flow agent 0.3Kg, pH regulator agent 0.3Kg, defoamer 0.3Kg, film coalescence aid 1Kg, water 3Kg; Described B component is anion-modified HDI polyisocyanates, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.25;
Described polyacrylic acid polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, the pH regulator agent is adopted among the AP-95 of the Dow Chemical Company and auxiliary agent, film coalescence aid adopts the dipropylene glycol butyl ether, and flow agent adopts the BYK 346 of German Bi Ke, and defoamer adopts the Tego 902W of Di Gao company.
2. the preparation method of the full light clear finish of the described aqueous dual-component of claim 1, it is characterized in that: it may further comprise the steps:
A, add polyacrylic acid polyvalent alcohol, flow agent, pH regulator agent, defoamer, film coalescence aid successively at stirred vessel, stir under 700 rev/mins of stirrings, water cleaning equipment and adjust viscosity to 125KU filters and obtains component A;
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.4 gets product, and described B component is anion-modified HDI polyisocyanates.
3. the full light clear finish of aqueous dual-component, it is characterized in that: it is made of component A and B component, and described component A is: polyacrylic acid polyvalent alcohol 70Kg, flow agent 0.1Kg, pH regulator agent 0.1Kg, defoamer 0.1Kg, film coalescence aid 0.1Kg, water 1Kg; Described B component is anion-modified HDI polyisocyanates, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.2;
Described polyacrylic acid polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, the pH regulator agent is adopted among the AP-95 of the Dow Chemical Company and auxiliary agent, film coalescence aid adopts the dipropylene glycol butyl ether, flow agent adopts the Troysol LAC of U.S. Troy chemical company, and defoamer adopts the BYK 028 of German Bi Ke.
4. the preparation method of the full light clear finish of the described aqueous dual-component of claim 3, it is characterized in that: it may further comprise the steps:
A, add polyacrylic acid polyvalent alcohol, flow agent, pH regulator agent, defoamer, film coalescence aid successively at stirred vessel, stir under 600 rev/mins of stirrings, water cleaning equipment and adjust viscosity to 120KU filters and obtains component A;
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.2 ︰ 0.3 gets product, and described B component is anion-modified HDI polyisocyanates.
5. the full light clear finish of aqueous dual-component, it is characterized in that: it is made of component A and B component, and described component A is: polyacrylic acid polyvalent alcohol 80Kg, flow agent 0.5Kg, pH regulator agent 0.5Kg, defoamer 0.5Kg, film coalescence aid 2Kg, water 5Kg; Described B component is anion-modified HDI polyisocyanates, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.3;
Described polyacrylic acid polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, the pH regulator agent is adopted among the AP-95 of the Dow Chemical Company and auxiliary agent, film coalescence aid adopts the dipropylene glycol butyl ether, and flow agent adopts the BYK 346 of German Bi Ke, and defoamer adopts the BYK 028 of German Bi Ke.
6. the preparation method of the full light clear finish of the described aqueous dual-component of claim 5, it is characterized in that: it may further comprise the steps:
A, add polyacrylic acid polyvalent alcohol, flow agent, pH regulator agent, defoamer, film coalescence aid successively at stirred vessel, stir under 800 rev/mins of stirrings, water cleaning equipment and adjust viscosity to 130KU filters and obtains component A;
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.3 ︰ 0.5 gets product, and described B component is anion-modified HDI polyisocyanates.
7. the full light clear finish of aqueous dual-component, it is characterized in that: it is made of component A and B component, and described component A is: polyacrylic acid polyvalent alcohol 77Kg, flow agent 0.25Kg, pH regulator agent 0.2Kg, defoamer 0.2Kg, film coalescence aid 1.8Kg, water 2Kg; Described B component is anion-modified HDI polyisocyanates, and the weight ratio of component A and B component is: component A ︰ B component=1 ︰ 0.25;
Described polyacrylic acid polyvalent alcohol adopts the Bayhydrol A145 of Bayer A.G, the pH regulator agent is adopted among the AP-95 of the Dow Chemical Company and auxiliary agent, film coalescence aid adopts the dipropylene glycol butyl ether, and flow agent adopts the BYK 346 of German Bi Ke, and defoamer adopts the EFKA 2035 of EFKA company.
8. the preparation method of the full light clear finish of the described aqueous dual-component of claim 7, it is characterized in that: it may further comprise the steps:
A, add polyacrylic acid polyvalent alcohol, flow agent, pH regulator agent, defoamer, film coalescence aid successively at stirred vessel, stir under 750 rev/mins of stirrings, water cleaning equipment and adjust viscosity to 127KU filters and obtains component A;
B, even by the proportioning allotment of component A ︰ component B ︰ water=1 ︰, 0.25 ︰ 0.3 gets product, and described B component is anion-modified HDI polyisocyanates.
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