CN101619194B - Yellowing-resistant quick-drying polyurethane wood paint and using method thereof - Google Patents
Yellowing-resistant quick-drying polyurethane wood paint and using method thereof Download PDFInfo
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- CN101619194B CN101619194B CN200810040128A CN200810040128A CN101619194B CN 101619194 B CN101619194 B CN 101619194B CN 200810040128 A CN200810040128 A CN 200810040128A CN 200810040128 A CN200810040128 A CN 200810040128A CN 101619194 B CN101619194 B CN 101619194B
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Abstract
The invention provides a yellow-resistant quick-drying polyurethane wood paint and a using method thereof. The polyurethane wood paint is prepared by mixing a main paint, a curing agent and a diluent, wherein the main paint comprises 30 to 45 weight percent of hydroxylated acrylic resin; and the curing agent comprises 40 to 50 weight percent of hexamethylene diisocyanate prepolymer. The paint film of the yellow-resistant quick-drying polyurethane wood paint provided by the invention has excellent yellowing resistance; and the yellowing resistance delta E is less than 0.5 when the polyurethane wood paint is radiated by UVA for 168 hours or naturally stored indoors for three years; and the paint film overcomes the defect that the hexamethylene diisocyanate prepolymer and the hydroxylated acrylic resin reacts slowly, and the surface dry time and the pressure dry time of the paint film are respectively 0.5 hour and 1.5 hours (at a temperature of 25 DEG C and a humidity of 50 percent).
Description
Technical field
The present invention relates to a kind of polyurethane carpentry paint.
Background technology
Polyurethane carpentry paint on the market (be called for short the PU wood lacquer, down with) now, it is that base-material is manufactured that main lacquer generally adopts the vegetables oil short-oil alkyd; Solidifying agent generally adopts tolylene diisocyanate affixture or toluene diisocyanate trimer to manufacture; There is following defective in paint film after main lacquer solidifies with the solidifying agent proportional mixing, and the aromatic amine ester bond very easily is oxidized to quinone by ultraviolet ray and turns to be yellow in (one) its urethane, and a small amount of unsaturated double-bond is turned to be yellow by ultraviolet oxidation in (two) vegetables oil short-oil alkyd; Cause the paint film yellowing resistance relatively poor; Yellowing resistance (UVA, 168 hours)/Δ E aberration reaches more than 10.0, has influenced decorative quality.
Summary of the invention
The purpose of this invention is to provide a kind of Yellowing-resistant quick-drying polyurethane wood paint and method of use thereof, to overcome the above-mentioned defective that prior art exists.
PU wood lacquer provided by the invention is mainly mixed by main lacquer, solidifying agent and three kinds of components of thinner, main lacquer: solidifying agent: thinner=4: 0.8～1.0: 2～3, weight ratio;
Described main enamel-cover is drawn together following components in weight percentage:
Hydroxylated acrylic resin 30-45%
White titanium pigment 0-25%
Cellulose acetate butyrate 5-10%
Flatting silica 0-3%
Anti-settling agent 0.2-0.8%
Flow agent 0.1-0.3%
Skimmer 0.1-0.2%
Siccative 0.05-0.08%
Butylacetate 25-31%
The hydroxyl value of described Hydroxylated acrylic resin is 50-70;
The preferred Rutile type Titanium Dioxide of described white titanium pigment can adopt R-930 of the R-706 of U.S. DU Pont company, Japanese Shi Yuan company etc.;
The preferred hydroxyl value of described cellulose acetate butyrate is the cellulose acetate butyrate of 140-160, can adopt CAB-553-0.4 or CAB-551-0.2 of U.S. Eastman company etc.;
Described flatting silica is the silicon-dioxide of handling through wax, can adopt the OK412 of German Degussa company or the SYLOID ED-30 of U.S. Grace company etc.;
Described anti-settling agent is selected from more than one in polyethylene wax, polyamide wax or the aerosil, like the 202P of the modest company of Taiwan moral, the 6900-20X of DISPARLON company, the Aerosil 200 of U.S. Degussa company etc.;
Described flow agent is selected the acrylate polymeric flow agent for use, like the BYK-354 of BYK company;
Described skimmer is polyether-modified polysiloxane defoamers, like 5500 of the BYK-020 of German BYK company or the modest company of Taiwan moral;
Described siccative is a dibutyl tin laurate, like the TIN-18 of the modest company of moral or the C101 of French Arkema etc.
Solidifying agent comprises following components in weight percentage:
Butylacetate 50-60%, hexamethylene diisocyanate prepolymer 40-50%;
Described hexamethylene diisocyanate prepolymer is selected from hexamethylene diisocyanate biuret or hexamethylene diisocyanate trimer, and in the prepolymer, NCO content is 16-17%, like the Desmodur N-75 or the N-3375 of German Bayer company;
Thinner comprises following components in weight percentage:
Oil xylol 30-40%, butylacetate 50-60%, 1-Methoxy-2-propyl acetate 4-10%;
The method of use of Yellowing-resistant quick-drying PU wood lacquer of the present invention is following:
To lead lacquer and solidifying agent mixing earlier, and add the thinner mixing again, and can adopt method well known in the art then, as brushing, having gas or Airless spraying to construct, every area of coating all over constructing is 10-14m
2/ KG, repainting hours 4-12 hour.Drying conditions is: drying temperature 5-40 ℃, 3-8 hour time of drying, drying means is seasoning.
Yellowing-resistant quick-drying PU wood lacquer provided by the invention has the following advantages:
PU wood lacquer of the present invention has been selected the Hydroxylated acrylic resin and the hexamethylene diisocyanate prepolymer cross-linking reaction with excellent weather resistance of tool excellent weather resistance for use because of main film forming matter; Make paint film have excellent anti-yellowing property; Yellowing resistance (UVA; 168 hours) Δ E＜0.5, yellowing resistance (indoor depositing naturally 3 years) Δ E＜0.5; The present invention has selected the good low hydroxyl value Hydroxylated acrylic resin of dryness for use; Be aided with the organotin catalysts that promotes the quick-drying high hydroxyl value response type cellulose acetate butyrate of paint film, has quickening polyurethane reaction speed simultaneously; Changed the slower shortcoming of hexamethylene diisocyanate prepolymer and Hydroxylated acrylic resin reaction; Paint film table, the time of pressing dry are respectively 0.5 hour, 1.5 hours (25 ℃ of temperature, humidity 50%).
Below explain that through specific examples but the present invention is not limited to following preferred embodiment.
Embodiment
Embodiment 1
Main lacquer (weight):
Butylacetate 40.0KG
Hydroxylated acrylic resin 70.0KG
White titanium pigment 50.0KG
Cellulose acetate butyrate 16.0KG
Flatting silica 4.0KG
Anti-settling agent 0.5KG
Skimmer 0.4KG
Flow agent 0.4KG
Siccative 0.1KG
Butylacetate 18.0KG
The hydroxyl value of Hydroxylated acrylic resin is 66, adopts the Desmophen A XP 2412 of Bayer company;
The cellulose acetate butyrate hydroxyl value is 158, adopts the CAB-553-0.4 of Eastman company;
White titanium pigment is a Rutile type Titanium Dioxide, adopts the R-706 of DU Pont company;
Flatting silica is selected the ED-30 of Grace company for use;
Skimmer is selected the polyether-modified polysiloxane defoamers of the BYK-020 of BYK company for use;
Anti-settling agent is selected the 6900-20X polyamide wax of DISPARLON company for use;
Flow agent is selected the BYK-354 acrylate polymeric flow agent with BYK company for use;
The siccative dibutyl tin laurate is selected the TIN-18 organotin of the modest company of moral for use;
40.0KG butylacetate and 16.0KG cellulose acetate butyrate are added under whipped state in the 200 liter high speed dispersors, and middling speed (500-700 rev/min) is stirred to dissolving.Add 70.0KG Hydroxylated acrylic resin, 50.0KG white titanium pigment, 4.0KG flatting silica, 0.5KG anti-settling agent, 0.4KG skimmer, with LV high speed dispersion 25-40 minute of 20m/s or to be ground to fineness through sand mill be 30 μ m.Continuation adding 0.4KG flow agent, 0.1KG siccative and residue 18.0KG butylacetate stir and make the main component of coating with lacquer of white;
Solidifying agent (weight):
Butylacetate 100.0KG, hexamethylene diisocyanate prepolymer 80.0KG;
The hexamethylene diisocyanate prepolymer is the Desmodur N-75 hexamethylene diisocyanate biuret of Bayer company; Butylacetate and hexamethylene diisocyanate prepolymer weight share are fed intake in 200 liter stirrers, stir to make with 300-400 rev/min and pass through curing agent component clearly; In the prepolymer, NCO content is 16.5%;
Thinner (weight):
Oil xylol 60.0KG, butylacetate 100.0KG, 1-Methoxy-2-propyl acetate 10.0KG;
Oil xylol, butylacetate and 1-Methoxy-2-propyl acetate solvent weight share are dropped in the 200 liter solvent cylinders, be stirred to evenly, make the clear transparent thinner composition of water through the toothed gear pump circulation.
To lead lacquer: solidifying agent: thinner is construction in 4: 1: 2.5 by weight ratio, makes Yellowing-resistant quick-drying PU woodenware white finish paint.Adopt the relevant criterion method to detect, the result is following:
| Project | Data | The method of inspection |
| Surface drying divides | 0.5 | GB/T?1728-1979(1989) |
| Do solid work, hour | 1.0 | GB/T?1728-1979(1989) |
| Yellowing resistance, Δ E (UVA168 hour) | 0.4 | IOS?11507：1997 |
| Hardness, 48 hours | 2H | GB/T?6739-2006 |
| Snappiness, mm | 1 | GB/T?1731-1993 |
| Shock resistance, kgcm | 50 | GB/T?1732-1993 |
Embodiment 2
Main lacquer (weight):
Butylacetate 40.0KG
Cellulose acetate butyrate 12.0KG
Hydroxylated acrylic resin 89.0KG
Flatting silica 7.0KG
Anti-settling agent 0.5KG
Skimmer 0.4KG
Flow agent 0.5KG
Siccative 0.18KG
Butylacetate 50.0KG
The hydroxyl value of Hydroxylated acrylic resin is 66, adopts the Desmophen A XP 2412 of Bayer company;
The cellulose acetate butyrate hydroxyl value is 158, adopts the CAB-553-0.4 of Eastman company;
Flatting silica is selected the ED-30 of Grace company for use;
Anti-settling agent is selected the 6900-20X polyamide wax of DISPARLON company for use;
Skimmer is selected 5500 polyether-modified polysiloxane defoamers of the modest company of moral for use;
Flow agent is selected the BYK-354 acrylate polymeric flow agent of BYK company for use;
The siccative dibutyl tin laurate is selected the TIN-18 organotin of the modest company of moral for use.
40.0KG butylacetate and 12.0KG cellulose acetate butyrate are added under whipped state in the 200 liter high speed dispersors, and middling speed (500-700 rev/min) is stirred to dissolving fully.Adding 89.0KG Hydroxylated acrylic resin, 7.0KG flatting silica, 0.5KG anti-settling agent, 0.4KG skimmer, is 30 μ m with the LV high speed dispersion of 20m/s 15-25 minute to fineness.Continuation adding 0.5KG flow agent, 0.18KG siccative and residue 50.0KG butylacetate stir and make transparent main lacquer component.
Solidifying agent (weight):
Butylacetate 100.0KG, hexamethylene diisocyanate prepolymer 85.0KG;
The hexamethylene diisocyanate prepolymer is the Desmodur N-3375 hexamethylene diisocyanate trimer of Bayer company; Butylacetate and hexamethylene diisocyanate prepolymer weight share are fed intake in 200 liter stirrers, stir at a slow speed to make with 350 rev/mins and pass through curing agent component clearly.In the prepolymer, NCO content is 16.3%;
Thinner (weight):
Oil xylol 70.0KG, butylacetate 90.0KG, 1-Methoxy-2-propyl acetate 10.0KG;
Oil xylol, butylacetate and 1-Methoxy-2-propyl acetate solvent weight share are dropped in the 200 liter solvent cylinders, be stirred to evenly, make the clear transparent thinner composition of water through the toothed gear pump circulation.
To lead lacquer: solidifying agent: thinner is construction in 4: 1: 2.5 by weight ratio, makes Yellowing-resistant quick-drying PU woodware varnish.
Adopt relevant national standard method to detect, the result is following:
| Project | Data | The method of inspection |
| Surface drying divides | 0.5 | GB/T?1728-1979(1989) |
| Do solid work, hour | 1.5 | GB/T?1728-1979(1989) |
| Yellowing resistance, Δ E (UVA168 hour) | 0.3 | IOS?11507：1997 |
| Hardness, 48 hours | 2H | GB/T?6739-2006 |
| Snappiness, mm | 1 | GB/T?1731-1993 |
| Shock resistance, kgcm | 50 | GB/T?1732-1993 |
Claims (4)
1. a Yellowing-resistant quick-drying polyurethane wood paint is characterized in that, is mixed by main lacquer, solidifying agent and three kinds of components of thinner, and the component and the weight percent of described main lacquer comprise:
The component and the weight percent of described solidifying agent comprise:
Butylacetate 50-60%
Hexamethylene diisocyanate prepolymer 40-50%, the component and the weight percent of described thinner comprise:
Oil xylol 30-40%
Butylacetate 50-60%
1-Methoxy-2-propyl acetate 4-10%,
The mixed weight proportioning of above-mentioned three kinds of components is: main lacquer: solidifying agent: thinner :=4: 0.8-1.0: 2-3.
2. Yellowing-resistant quick-drying polyurethane wood paint according to claim 1; It is characterized in that described anti-settling agent is selected from more than one in polyethylene wax, polyamide wax or the aerosil, employing be the 202P of the Taiwan modest company of moral, the 6900-20X of DISPARLON company, the Aerosil 200 of U.S. Degussa company.
3. Yellowing-resistant quick-drying polyurethane wood paint according to claim 1 is characterized in that described hexamethylene diisocyanate prepolymer, and NCO content is 16-17%.
4. according to the method for use of each described Yellowing-resistant quick-drying polyurethane wood paint of claim 1～3, it is characterized in that, comprise the steps:
To lead lacquer and solidifying agent mixing earlier, and add the thinner mixing again, and can adopt method well known in the art then, and brush, have gas or Airless spraying to construct, every area of coating all over constructing is 10-14m
2/ KG, repainting hours 4-12 hour, drying conditions was: drying temperature 5-40 ℃, 3-8 hour time of drying, drying means is seasoning.
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| CN200810040128A CN101619194B (en) | 2008-07-02 | 2008-07-02 | Yellowing-resistant quick-drying polyurethane wood paint and using method thereof |
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| CN200810040128A CN101619194B (en) | 2008-07-02 | 2008-07-02 | Yellowing-resistant quick-drying polyurethane wood paint and using method thereof |
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| CN101619194B true CN101619194B (en) | 2012-09-26 |
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| CN102676017A (en) * | 2012-04-27 | 2012-09-19 | 北京展辰化工有限公司 | Wood lacquer and preparation method thereof |
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Application publication date: 20100106 Assignee: Bauhinia coating (Shanghai) Co., Ltd. Assignor: Zijinghua Paint (Shanghai) Co., Ltd. Contract record no.: 2015990000054 Denomination of invention: Yellowing-resistant quick-drying polyurethane wood paint and using method thereof Granted publication date: 20120926 License type: Exclusive License Record date: 20150203 |
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Effective date of registration: 20150630 Address after: 201512 No. 1288 Huatong Road, Shanghai, Jinshan District Patentee after: Bauhinia coating (Shanghai) Co., Ltd. Address before: 201706, Qingpu District, Shanghai, 6511 North Green Road Patentee before: Zijinghua Paint (Shanghai) Co., Ltd. |