CN103805048A - Polyaspartic acid ester protective paint for landscape prop and preparation method thereof - Google Patents
Polyaspartic acid ester protective paint for landscape prop and preparation method thereof Download PDFInfo
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- CN103805048A CN103805048A CN201410076683.9A CN201410076683A CN103805048A CN 103805048 A CN103805048 A CN 103805048A CN 201410076683 A CN201410076683 A CN 201410076683A CN 103805048 A CN103805048 A CN 103805048A
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Abstract
The invention provides a polyaspartic acid ester protective paint for a landscape prop and a preparation method of the polyaspartic acid ester protective paint. The polyaspartic acid ester protective paint for the landscape prop comprises the following ingredients in parts by weight: a component A consisting of 40-70 parts of aliphatic isocyanate, 30-50 parts of polyether polyol and 0-0.2 part of a catalyst, and a component B consisting of 40-60 parts of polyaspartic acid resin, 20-40 parts of a chain extender, 0-15 parts of a plasticizer, 5-20 parts of fillers, 0.5-2 parts of a pigment and 1.9-9 parts of an assisting agent, wherein the mass ratio of the component A to the component B is (0.5-2):1. The polyaspartic acid ester protective paint for the landscape prop has a long gelation time and can meet the requirements of manual blade coating or brush coating. The invention also discloses the preparation method of the polyaspartic acid ester protective paint for the landscape prop. The preparation method is simple and easy to implement and can realize industrial production of the polyaspartic acid ester protective paint for the landscape prop.
Description
Technical field
The present invention relates to polyureas technology, relate in particular to a kind of view stage property polyaspartic ester protective coating and preparation method thereof.
Background technology
Make field at view stage property, once used FRP glass reinforced plastic, due to the fragility of itself, so must add glass fibre to strengthen, greatly reduce production efficiency in FRP glass reinforced plastic, cause environmental pollution, not environmental protection; Make stage property with GRC cement, GRG gypsum, density is high, from great, especially making when large-scale stage property, very impracticable, and exist easy to crack, weather resistance, the shortcoming such as weathering resistance is not good, and surperficial defectiveness and production efficiency are not high.Also someone adopts timber to make stage property in addition, but wood working is carved with certain difficulty, and causes resource to waste in a large number, and relative cost is higher.In addition foam materials because its light weight, environmental protection are anti-aging, low cost, etc. advantage be also widely used in view stage property, but its material self physical and mechanical properties is superior not, poor durability,, volume many in stage property quantity is large and during as outdoor exhibition, exists such as the much hidden danger that causes damage such as shocks, wearing and tearing.In order to solve the problems referred to above of foam materials, need to adopt take these materials as base material, one deck protective coating is added on surface.Traditional protective coating is generally: epoxy resin, water-borne coatings, powder coating etc.There is following shortcoming in these protective materials: 1, toughness deficiency very easily ftractures under impacting; 2, in system, contain organic solvent, volatizable material is too many, harmful; 3, use and must adopt multiple working procedure, the cycle is long, efficiency is low.
Carbamide paint is a kind of novel environment friendly green coating, the Novel solvent-free that carbamide paint is spray mo(u)lding, free of contamination environmental protection bicomponent material.It has advantages of fast setting, high solids content, zero VOC, environmentally friendly, soft or hard is adjustable, mechanical strength is excellent, strong adhesion, easily repair, insensitive to ambient moisture, speed of application is fast, efficiency is high, media-resistant, nontoxicity substance release, weather resistance and weathering resistance.
But local pin-hole phenomena appears in current two-component spraying polyurea gel excessive velocities sometimes in spraying process, and flex point, node spraying difficulty, affect the aesthetic of view stage property.And in the time spraying stage property little or structure comparison elaborate, spray gun spraying is not easy to operate, also can cause the waste of polyurea materials.
Summary of the invention
The object of the invention is to, need to adopt the problem of spray gun for above-mentioned two-component spraying polyurea gel excessive velocities, spraying, a kind of view stage property polyaspartic ester protective coating is proposed, that a kind of reaction is slow, gel time is long, the manual polyurethane protective coating that mechanical property is similar with spray polyurea, this view stage property can meet the needs of manual blade coating or brushing with polyaspartic ester protective coating.
For achieving the above object, the technical solution used in the present invention is: a kind of view stage property comprises with polyaspartic ester protective coating each component that weight proportion is following:
A component:
40～70 parts of aliphatic isocyanates, are preferably 55-60 part; 30～50 parts of polyether glycols, are preferably 40-50 part; 0～0.2 part of catalyzer, is preferably 0.1～0.2 part;
B component:
40～60 parts of poly-aspartic-acid resins, are preferably 55-60 part; 20～40 parts of chainextenders, are preferably 20-30 part; 0～15 part, softening agent, is preferably 10-15 part; 5～20 parts of fillers, are preferably 15-20 part; 0.5～2 part of pigment, is preferably 0.1-0.2 part; 1.9～9 parts of auxiliary agents, are preferably 5-9 part;
The mass ratio of described A component and B component is 0.5～2:1, and preferred mass ratio is 1:1.
Further, described in the present invention, isocyanic ester is aliphatic isocyanates, described aliphatic isocyanates comprises hexamethylene diisocyanate trimer, hexamethylene diisocyanate biuret, 4, one or more in 4'-dicyclohexyl methane diisocyanate and isophorone diisocyanate.
Further, described polyether glycol is one or more in Polyoxypropylene diol, polyoxytrimethylene trivalent alcohol and polytetrahydrofuran dibasic alcohol, and its molecular-weight average is 500～3000.
Further, described catalyzer be Cu Jin ?NCO Yu ?the OH catalyzer that carries out addition reaction, preferred catalyzer is one or more in tertiary amine catalyst, dibutyltin diacetate and dibutyl tin laurate.The lower reaction system of described catalyzer energy catalytic reaction activity completes reaction within the rational time.
Further, described polyaspartic ester is group aliphatic resin and/or group aliphatic resin derivative, can be a kind of polyaspartic ester group aliphatic resin or derivatives thereof, can be also the combination of several arbitrary proportions, and the structural formula of described polyaspartic ester is:
Wherein R is alkyl, and X is the carbon-chain structure of straight chain or ring-type, and its molecular weight is 500～3000.
Further, described chainextender is binary amine chainextender, and described chainextender can increase high molecular chain length, makes material property more excellent.
Further, described softening agent is dioctyl phthalate (DOP) and/or dibutyl phthalate.When solid packing in system and auxiliary agent are when more, system viscosity can raise, and suitably adds softening agent can realize following advantage: the viscosity that 1. reduces melt; 2. increase the snappiness of superpolymer; 3. increase the elongation at break of superpolymer; 4. reduce the forming process temperature of superpolymer; 5. improve the forming process characteristic of superpolymer; 6. improve the impact property of superpolymer; 7. improve the low temperature flexibility of superpolymer; 8. reduce the surface hardness of superpolymer.
Further, described filler is one or more in fine particle calcium carbonate, coarse whiting, talcum powder, calcium hydroxide, zinc phosphate and mica powder, and filler order number is more than 800 orders.
Further, described pigment is one or more in titanium dioxide, molybdenum red, indigo-blue indigo plant and carbon black.By selecting different pigment polyaspartic ester protective coating of the present invention can present different colours.
Further, described auxiliary agent is one or more of oxidation inhibitor, wetting dispersing agent, defoamer, flow agent, thixotropic agent and water-retaining agent weight.Preferred described auxiliary agent comprises each component that weight proportion is following:
0.5～2 part, oxidation inhibitor, is preferably 1-2 part; 0.1～0.5 part of wetting dispersing agent, is preferably 0.2-0.4 part; 0.1～0.5 part of defoamer, is preferably 0.2-0.4 part; 0.1～0.5 part of flow agent, is preferably 0.2-0.4 part; 0.1～0.5 part of thixotropic agent, is preferably 0.2-0.4 part; 1～5 part of water-retaining agent, is preferably 3-5 part.
Further, described oxidation inhibitor is 2, one or more in the tertiary Ding Ji ?4 ?methylphenols of 6 ?bis-, two (3,5 tri-grades of ?fourth base ?, 4 ?hydroxy phenyls) thioether and four (β ?(3,5 tri-grades of ?fourth base ?, 4 ?hydroxy phenyls) propionic acid) pentaerythritol ester.Described wetting dispersing agent is one or more in BYK-220S, BYK-161 and BYK-163.Described defoamer is one or more in BYK-066N, BYK-054 and BYK-5500.Described flow agent is one or more in BYK-354, BYK-355 and BYK-356.Described thixotropic agent is one or more in polyamide wax, silicon-dioxide, organobentonite and hydrogenated castor oil.Described water-retaining agent is physics water-removal agent and/or chemical water-removal agent.
Another object of the present invention also provides the preparation method of a kind of view stage property polyaspartic ester protective coating, comprises the following steps:
The preparation of A component:
Polyether glycol is joined to stirring at low speed 2-10 minute in container, be preferably 5 minutes, be heated to 110～120 ℃, vacuum hydro-extraction to water ratio is less than 3/10000ths, and being cooled to liquid material temperature is 30-50 ℃, is preferably 40 ℃; Aliphatic isocyanates and catalyzer are joined in container, slowly be warming up to 80～90 ℃, the slowly intensification too fast implode that induces reaction that can prevent from heating up, keep reaction 1-3h, be preferably 2h, sampling, detect NCO% value and (reach set(ting)value theoretical value, error ± 0.2%) after, be cooled to 20-40 ℃ of discharging, be preferably 40 ℃; Vacuum of the present invention adopts vacuum pump to realize, and vacuum tightness is-0.1～-0.08MPa, and the vacuum hydro-extraction time is generally 2h;
Polyether glycol has certain viscosity, and suitable stirring is dispersed in reactor it, and thermally equivalent, so join polyether glycol to need stirring at low speed certain hour in container.Slow intensification of the present invention is that per minute heats up 5～10 ℃.NCO% design load of the present invention calculates according to raw material.
The preparation of B component:
Polyaspartic ester resin, chainextender and softening agent are added in mixing tank, stirring at low speed running is after 2-10 minute, be preferably 5 minutes, filler and pigment are joined to mixing tank high speed dispersion 20-60min, be preferably 30 minutes, again auxiliary agent is added mixing tank high speed to disperse 20-60min, be preferably 30 minutes, be taken up in order of priority mix object be for better B component being uniformly dispersed, to product, moisture and outward appearance detects, moisture content lower than 300ppm and outward appearance without layering, without discharging after loose colour.
Stirring at low speed of the present invention (dispersion) is 100-300rpm, and high-speed stirring (dispersion) is 800-1200rpm.
The invention discloses a kind of view stage property polyaspartic ester protective coating and preparation method thereof, as shown in table 1 with the result of existing rigidity polyurea materials comparison:
The detected result of table 1 polyaspartic ester protective coating of the present invention and rigidity polyurea materials performance
Note: manufacture and maintenance model according to GB/T 19250-2003, it is carried out to Performance Detection
(1), the A component of rigidity polyurea materials adopts aromatic isocyanate, A component of the present invention is selected aliphatic isocyanates, aliphatic isocyanates has improved the problem of UV resistant, durability service life; The present invention is also by selecting polyaspartic ester resin to improve gel time.
(2), through performance contrast can find out, the physical and mechanical propertiess such as polyaspartic ester ester protective coating tensile strength of the present invention, elongation at break and tear strength are splendid, and have longer gel time, are applicable to manual brushing.
(3), polyaspartic ester ester protective coating solid content of the present invention is high, VOC free (volatile organic compounds) discharge, belongs to environmentally friendly machine.
(4), polyaspartic ester ester protective coating of the present invention has good compatibility with original spary coating type polyureas, makes polyaspartic ester ester protective coating be difficult for coming off from original spary coating type polyureas.
(5), by manual blade coating or brushing polyaspartic ester ester of the present invention protective coating, can make up pin-hole phenomena, and be convenient to local construction, reduce polyurea materials waste, reduce costs.
(6), preparation method of the present invention simply, easily go, can realize the suitability for industrialized production that is applicable to view stage property use polyaspartic ester protective coating.
To sum up, the present invention introduces poly-aspartic-acid resin by introducing in A component in Fang Zu family isocyanic ester and B component, and specifically define the consumption of each component, polyaspartic ester protective coating of the present invention is reached unanimity with polyurea materials in performance, UV resistant performance excellence, long service life, gel time are long, the manual brushing that can realize widget, complex component, economizes in raw materials, and reduces costs.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
Embodiment 1
The present embodiment discloses a kind of view stage property polyaspartic ester protective coating, is made up of A component and B component:
A component is:
50.3 parts of hexamethylene diisocyanate biurets
49.6 parts of Polyoxypropylene diols
0.1 part of organic mercury catalyzer
B component is:
Described in when use, the mass ratio of A component and B component is 1:1.
The present embodiment view stage property is as follows by the preparation method of polyaspartic ester protective coating:
A component:
Quantitative Polyoxypropylene diol is added in container, by liquid material stirring at low speed (100～300r/min) after 5 minutes, be heated to 110～120 ℃, open vacuum pump, vacuum tightness is-0.1～-0.08MPa, and vacuum hydro-extraction 2h removes a small amount of water containing in raw material, detect water ratio and need reach below 0.3 ‰, being cooled to liquid material temperature is 40 ℃ of left and right.The hexamethylene diisocyanate biuret measuring and organic mercury catalyzer are added in container, slowly be warming up to 80～90 ℃, to prevent the too fast implode that induces reaction that heats up, keep reaction 2h, sampling, after detection NCO% value (reaching set(ting)value theoretical value, error ± 0.2%) is qualified, cooling discharge.
B component:
First by quantitative polyaspartic ester resin and 4, 4 '-bis-Zhong Ding ADP methylmethanes, dioctyl phthalate (DOP) adds in mixing tank, stirring at low speed (100～300r/min) running is after 5 minutes, by quantitative talcum powder, fine particle calcium carbonate and titanium dioxide add in mixing tank and high speed dispersion (800～1200r/min) 30 minutes, by quantitative 2, 6-di-tert-butyl-4-methy phenol, BYK-220S, BYK-054, BYK-354, silicon-dioxide, Calcium Chloride Powder Anhydrous adds in mixing tank high speed dispersion 30 minutes again, be taken up in order of priority mix object be for better B component being uniformly dispersed, to product, moisture and outward appearance detects, water ratio need reach below 0.3 ‰, outward appearance is without layering, without discharging after loose colour.
The present embodiment view stage property is as shown in table 2 by polyaspartic ester protective coating the performance test results:
The performance test results of polyaspartic ester protective coating for table 2 embodiment 1 view stage property
As visible in table 2, polyaspartic ester protective coating mechanical property excellence for view stage property prepared by the present embodiment, especially its gel time reaches 43min, can meet the needs of manual polyureas.
Embodiment 2:
The present embodiment discloses a kind of view stage property polyaspartic ester protective coating, is made up of A component and B component:
A component is:
62.5 parts of isophorone diisocyanates
37.5 parts of polytetrahydrofuran dibasic alcohol
B component is:
Described in when use, the mass ratio of A component and B component is 1:1.
The present embodiment view stage property is as follows by the preparation method of polyaspartic ester protective coating:
A component:
Quantitative polytetrahydrofuran dibasic alcohol is added in container, by liquid material stirring at low speed (100～300r/min) after 5 minutes, be heated to 110～120 ℃, open vacuum pump, vacuum tightness is-0.1～-0.08MPa, and vacuum hydro-extraction 2h removes a small amount of water containing in raw material, detect water ratio and need reach below 0.3 ‰, being cooled to liquid material temperature is 40 ℃ of left and right.The isophorone diisocyanate measuring is added in container, be slowly warming up to 80～90 ℃, to prevent the too fast implode that induces reaction that heats up, keep reaction 2h, sampling, detects NCO% value and (reaches set(ting)value theoretical value, error ± 0.2%) qualified after, cooling discharge.
B component:
First by quantitative polyaspartic ester resin and 4, 4'-diamino-3, 3'-dichloro diphenyl methane, dibutyl phthalate adds in mixing tank, stirring at low speed (100～300r/min) running is after 5 minutes, by quantitative talcum powder, fine particle calcium carbonate and molybdenum red add in mixing tank and high speed dispersion (800～1200r/min) 30 minutes, by quantitative 2, 6-di-tert-butyl-4-methy phenol, BYK-161, BYK-066N, BYK-355, silicon-dioxide, Calcium Chloride Powder Anhydrous adds in mixing tank high speed dispersion 30 minutes again, be taken up in order of priority mix object be for better B component being uniformly dispersed, to product, moisture and outward appearance detects, water ratio need reach below 0.3 ‰, outward appearance is without layering, without discharging after loose colour.
The performance test results is as shown in table 3:
The performance test results of polyaspartic ester protective coating for table 3 embodiment 2 view stage properties
As seen in Table 3, polyaspartic ester protective coating mechanical property excellence for view stage property prepared by the present embodiment, especially its gel time reaches 38min, can meet the needs of manual polyureas.
Embodiment 3
The present embodiment discloses a kind of view stage property polyaspartic ester protective coating, is made up of A component and B component:
A component is:
4,4'-dicyclohexyl methane diisocyanate: 59.8 parts
Polyoxytrimethylene trivalent alcohol: 40.2 parts
B component is:
Described in when use, the mass ratio of A component and B component is 1:1.
The present embodiment view stage property is as follows by the preparation method of polyaspartic ester protective coating:
A component:
Quantitative polyoxytrimethylene trivalent alcohol is added in container, by liquid material stirring at low speed (100～300r/min) after 5 minutes, be heated to 110～120 ℃, open vacuum pump, vacuum tightness is-0.1～-0.08MPa, and vacuum hydro-extraction 2h removes a small amount of water containing in raw material, detect water ratio and need reach below 0.3 ‰, being cooled to liquid material temperature is 40 ℃ of left and right.By measure 4,4'-dicyclohexyl methane diisocyanate adds in container, is slowly warming up to 80～90 ℃, to prevent the too fast implode that induces reaction that heats up, keep reaction 2h, sampling, after detection NCO% value (reaching set(ting)value theoretical value, error ± 0.2%) is qualified, cooling discharge.
B component:
First by quantitative polyaspartic ester resin and chainextender, 1, the two Zhong Ding amino-benzenes of 4-, dioctyl phthalate (DOP) adds in mixing tank, stirring at low speed (100～300r/min) running is after 5 minutes, by quantitative talcum powder, fine particle calcium carbonate and indigo-blue indigo plant add in mixing tank and high speed dispersion (800～1200r/min) 30 minutes, by quantitative 2, 6-di-tert-butyl-4-methy phenol, BYK-161, BYK-054, BYK-354, silicon-dioxide, Calcium Chloride Powder Anhydrous adds in mixing tank high speed dispersion 30 minutes again, be taken up in order of priority mix object be for better B component being uniformly dispersed, to product, moisture and outward appearance detects, water ratio need reach below 0.3 ‰, outward appearance is without layering, without discharging after loose colour.
The performance test results is as shown in table 4:
The performance test results of polyaspartic ester protective coating for table 4 embodiment 3 view stage properties
As visible in table 4, polyaspartic ester protective coating mechanical property excellence for view stage property prepared by the present embodiment, especially its gel time reaches 54min, can meet the needs of manual polyureas.
The present invention is not limited to view stage property polyaspartic ester protective coating and preparation method thereof that above-described embodiment is recorded, the wherein change of each composition weight proportioning, and the change of preparation condition is all within protection scope of the present invention.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a view stage property polyaspartic ester protective coating, is characterized in that, comprises each component that weight proportion is following:
A component:
40～70 parts of aliphatic isocyanates
30～50 parts of polyether glycols
0～0.2 part of catalyzer
B component:
The mass ratio of described A component and B component is 0.5～2:1.
2. view stage property polyaspartic ester protective coating according to claim 1, it is characterized in that, described aliphatic isocyanates comprises hexamethylene diisocyanate trimer, hexamethylene diisocyanate biuret, 4, one or more in 4'-dicyclohexyl methane diisocyanate and isophorone diisocyanate.
3. view stage property polyaspartic ester protective coating according to claim 1, it is characterized in that, described polyether glycol is one or more in Polyoxypropylene diol, polyoxytrimethylene trivalent alcohol and polytetrahydrofuran dibasic alcohol, and its molecular-weight average is 500～3000.
4. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, to be promotion-NCO carry out the catalyzer of addition reaction with-OH with described catalyzer.
5. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, described polyaspartic ester is group aliphatic resin and/or group aliphatic resin derivative.
6. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, described chainextender is binary amine chainextender.
7. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, described softening agent is dioctyl phthalate (DOP) and/or dibutyl phthalate.
8. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, described auxiliary agent is one or more in oxidation inhibitor, wetting dispersing agent, defoamer, flow agent, thixotropic agent and water-retaining agent.
9. view stage property polyaspartic ester protective coating according to claim 1, is characterized in that, described water-retaining agent is physics water-removal agent and/or chemical water-removal agent.
10. a preparation method for view stage property use polyaspartic ester protective coating described in claim 1-9 any one, is characterized in that, comprises the following steps:
The preparation of A component:
Polyether glycol is joined to stirring at low speed 2-10 minute in container, be heated to 110～120 ℃, vacuum hydro-extraction to water ratio is less than 3/10000ths, and being cooled to liquid material temperature is 30-50 ℃; Aliphatic isocyanates and catalyzer are joined in container, be slowly warming up to 80～90 ℃, sampling, detects NCO% value and reaches after design load, cooling discharge;
The preparation of B component:
Polyaspartic ester resin, chainextender and softening agent are added in mixing tank, stirring at low speed running is after 2-10 minute, filler and pigment are joined to mixing tank high speed dispersion 20-60min, again auxiliary agent is added mixing tank high speed to disperse 20-60min, to product, moisture and outward appearance detects, moisture content lower than 300ppm and outward appearance without layering, without discharging after loose colour.
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