CN100358957C - Polyurethane base paint for coiled material - Google Patents
Polyurethane base paint for coiled material Download PDFInfo
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- CN100358957C CN100358957C CNB2005100254193A CN200510025419A CN100358957C CN 100358957 C CN100358957 C CN 100358957C CN B2005100254193 A CNB2005100254193 A CN B2005100254193A CN 200510025419 A CN200510025419 A CN 200510025419A CN 100358957 C CN100358957 C CN 100358957C
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Abstract
The present invention relates to polyurethane prime paint for coiled materials, which is formed by uniformly mixing the following materials: polyester resin 1, polyester resin 2, a crosslinking agent, pigment, an epoxy-phosphate compound, a solidifying catalyst and a solvent. The prime paint has the advantages of high solidification speed, solvent resistance (MEK) reaching 20 times, excellent adhesive force to metallic base materials, very nice pliability causing T bend to reach 0 to 2T and better foaming property causing that after foaming, the amount of a foaming agent adhering to a paint film can reach 90%, and therefore, the prime paint is suitable for occasions with higher requirements on T bend, such as buildings, household appliances, etc.
Description
Technical field
The coiled material polyurethane primer of the present invention relates to build, the household electrical appliances colour coated plate being used.
Background technology
Coil coating technical development at present is rapid, and is also more and more higher to the requirement of priming lacquer of coiled material.And coiled material still belongs to blank with polyurethane primer at home.Abroad, some famous coil coating manufacturing enterprises adopt polyurethane primer one after another, improve the snappiness of paint film.The paint film property bending is smaller or equal to 3T, and shock strength is 9.04J, and pencil hardness is more than or equal to 4B, and solvent resistance MEK is more than or equal to 3 times, and also has certain defective aspect foaminess, and after the foaming, the whipping agent of adhesive aggregation on paint film has only 70-80%.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, provide a kind of metal base is had good adhesion, paint film has excellent flexibility, and after the foaming, adhesive aggregation can reach coiled material polyurethane primer more than 90% at the whipping agent on the paint film.
Technical scheme of the present invention is as follows:
The polyurethane primer that coiled material of the present invention is used is to be formed by vibrin 1, vibrin 2, linking agent, pigment, epoxy phosphate compound, curing catalysts and solvent uniform mixing, and each component and weight % content are:
Component weight %
Vibrin 1 30-50
Vibrin 2 0-20
Linking agent 6-8
Pigment 20-30
Epoxy phosphate compound 1-5
Curing catalysts 0.2-1
Solvent 12-20
Described vibrin 1 be linear vibrin (referring to another application for a patent for invention of patent application of the present invention application in same day, denomination of invention is: a kind of polyester resin for priming lacquer of coiled material and preparation method thereof) molecular weight is 6000-10000, Tg is 30-40 ℃, and viscosity is 20-45 second.
Vibrin 1 is polymerized under the effect of catalyzer by the mixture of polyvalent alcohol, the mixture of polyprotonic acid, then with solvent to rare, each component and weight % content are:
Component weight %
Polyol blends 25-35
Polyprotonic acid mixture 15-20
Catalyzer 0.2-0.3
To rare solvent 44.7-59.8 that uses
The component of described polyol blends and weight % content are
Component weight %
Neopentyl glycol 50-75
Methyl propanediol 0-25
Tertiary carbonic acid glycidyl ester 0-25
The component of described polyprotonic acid mixture and weight % content are
Component weight %
Hexanodioic acid 10-20
M-phthalic acid 40-60
Terephthalic acid 10-20
Phthalic anhydride 0-15
Trimellitic acid 1,2-anhydride 0-5
Described catalyzer is an organotin catalysts, is selected from dibutyl tin laurate, dimethyl oxalic acid tin or dibutyl tin acetate etc.
Describedly be to rare component and weight % content with solvent
Component weight %
Dimethylbenzene 0-5
The heavy aromatic solvent 50-70 of C9-C10
1-Methoxy-2-propyl acetate 10-25
Butyl glycol ether 0-10
Diester 0-15
(described diester is made up of with weight ratio dimethyl succinate, Methyl glutarate and dimethyl adipate at 1: 1: 1)
The preparation method of vibrin 1 is as follows: polyprotonic acid mixture, polyol blends are added reactor, slowly be heated to 150-200 ℃, treat to add catalysts after the fusion, continue to be heated to 230-250 ℃, reaction times was controlled at 5-10 hour, reach acid number until reaction and be less than or equal to 2mgKOH/g, viscosity 20-45 second, then with solvent to rare to solids content 40-55%.
The technical indicator and the measured result of vibrin 1 are as follows:
| Project | Index | Measured result |
| Quality solids content % | 40-55 | 40-55 |
| Viscosity second | 20-45 | 30-36 |
| Acid number mgKOH/g | ≤2 | 1.6-2 |
| Molecular weight | 6000-10000 | 8000-10000 |
| Second-order transition temperature ℃ | 30-40 | 35-37 |
| Hydroxyl value mgKOH/g | 30-40 | 32-40 |
Described vibrin 2 is Uralac SH974 resins of being produced by DSM N. V., and molecular weight is 15000, and Tg is 47 ℃, and viscosity is 27 seconds.
Described linking agent comprises masked isocyanate and aminoresin.Masked isocyanate is to be selected from hexamethylene diisocyanate, tolylene diisocyanate and hexanodioic acid vulcabond; Aminoresin is to be selected from highly methyl etherified melamine resin, methyl etherified high imino-melamine resin or part methyl etherify melamine resin.The part by weight of masked isocyanate and aminoresin is 6-8: 1.
Described pigment is titanium dioxide powder and corrosion-inhibiting pigment, and titanium dioxide powder is a rutile-type, and corrosion-inhibiting pigment is the mixture that is selected from zinc-chrome yellow, strontium chromate or the yellow barium chromate one or more.The part by weight of titanium dioxide powder and corrosion-inhibiting pigment is 1.2-1.6: 1.
Described epoxy phosphate compound molecular weight is 300-5000, can promote the sticking power of priming paint and metal substrate.
Described curing catalysts is organotin or the compound that contains amine, organotin catalysts is to be selected from dibutyl tin laurate, dimethyl oxalic acid tin or dibutyl tin acetate, and the compound that contains amine is to be selected from triethylamine, diazabicylo [2.2.2] octane or an azabicyclic [2.2.2] octane.
The component solvent is the mixture that is selected from 1-Methoxy-2-propyl acetate, N-BUTYL ACETATE, butyl glycol ether, diester (dimethyl succinate, Methyl glutarate and dimethyl adipate are formed with weight ratio at 1: 1: 1) or the dimethylbenzene two or more in the described priming paint.
The preparation method of the polyurethane primer that coiled material of the present invention is used:
By said ratio that vibrin 1, titanium dioxide powder, corrosion-inhibiting pigment and stirring solvent is even, be ground to the following one-tenth of fineness 15 μ m mill base then, standby.The vibrin 1 of remainder and vibrin 2, linking agent, curing catalysts, epoxy phosphate compound and remaining solvent is even, under agitation ground mill base is slowly added in the container of above-mentioned premix honest material again, obtain primer solution.
Coiled material of the present invention is as follows with the technical indicator and the The performance test results of polyurethane primer:
| Project | Index | Measured result |
| Viscosity S | 30±5 | 30-34 |
| Quality solids content % | ≥54 | 55-56 |
| The highest metal sheet temperature (PMT) ℃ | 232-241 | 232-241 |
| Set time S | 20-25 | 21-23 |
| Film thickness μ m | 5-8 | 6 |
| Crooked T | ≤2 | 1 |
| Pencil hardness | F-2H | F |
| Shock strength J | 9.04 | 9.04 |
| (MEK) is inferior for solvent resistance | ≥3 | 20 |
Coiled material of the present invention is fast with the polyurethane primer curing speed, can 23 seconds PMT (the highest metal sheet temperature) reach 241 ℃, MEK can reach 20 times, metal substrate had excellent sticking power, paint film has good flexible, and T is curved can to reach 0-2T, is fit to building, household electrical appliances etc. and requires T to bend higher occasion.It can be used for two and be coated with two bakings, can be used for two again and is coated with a baking, has well expandablely, and after the foaming, adhesive aggregation can reach more than 90% at the whipping agent on the paint film.
The present invention adopts coil painting, and the evaporable solvent can be handled by the incendiary mode in the process of baking, can save energy, eliminate pollution to environment, and belong to green production, meet national industrial policies, have good social benefit and economic benefit.
Embodiment
The embodiment 1 coiled material of the present invention preparation method of polyurethane primer
At first prepare vibrin 1: with 187.5 kilograms neopentyl glycol, 62.5 the methyl propanediol of kilogram, 15 kilograms hexanodioic acid, 90 kilograms m-phthalic acid, 30 kilograms terephthalic acid, 15 kilograms of phthalic anhydrides add reactor, slowly are heated to 170 ℃, treat to add 2 kilograms of dibutyltin dilaurate catalysts after the fusion, continue to be heated to 240 ℃, the reaction times was controlled at 10 hours, and final reaction reaches acid number 2mgKOH/g, viscosity 30 seconds, 32 kilograms of aquifer yields are used 386.4 kilopond aromatic solvents (C9-C10) then, 138 kilograms of 1-Methoxy-2-propyl acetates and 27.6 kg ethylene glycol butyl ether to rare to solids content 40%, promptly get vibrin 1, standby.Record molecular weight 8000, viscosity 30 seconds, Tg35 ℃, hydroxyl value 34mg KOH/g, acid number 2mg KOH/g.
The preparation of priming paint takes by weighing 200 gram vibrin, 1,140 gram rutile titanium dioxide powder, 90 gram zinc chrome blooms, 10 gram yellow barium chromate powder, 45 gram 1-Methoxy-2-propyl acetates and 30 gram butyl glycol ethers stir, be ground to the following one-tenth of fineness 15 μ m mill base then, standby.265 gram vibrin 1 with remainder, 75 gram hexamethylene diisocyanates, the methyl etherified high imino-melamine resin of 11 grams, 4 gram dibutyl tin laurates, 20 gram epoxy phosphate compounds (molecular weight 3000) and 66 gram 1-Methoxy-2-propyl acetates and 44 gram butyl glycol ethers mix, under agitation ground mill base is slowly added in the container of above-mentioned premix honest material, promptly get primer solution.
The performance of priming paint test of the present invention and the performance of correlated external prior art are as follows:
| Project | Primer performance test of the present invention | External prior art * |
| Viscosity S | 34 | 25-30 |
| Quality solids content % | 55 | 52-57 |
| The highest metal sheet temperature (PMT) ℃ | 232 | 232-254 |
| Set time S | 21 | 20-25 |
| Film thickness μ m | 6 | 5-8 |
| Crooked T | 1 | ≤3 |
| Pencil hardness | F | ≥4B |
| Shock strength J | 9.04 | 9.04 |
| (MEK) is inferior for solvent resistance | 20 | ≥3 |
*The performance data of correlated external prior art is the coating data of selecting from relevant.
The embodiment 2 coiled materials of the present invention preparation method of polyurethane primer
Take by weighing 200 gram vibrin, 1,120 gram rutile titanium dioxide powder, 90 restrain the zinc chrome blooms, 10 gram strontium chromate powder, and 45 gram N-BUTYL ACETATEs and 30 gram diesters stir, and are ground to the following one-tenth of fineness 15 μ m mill base then, and are standby.197 gram polyester gram polyester 1 with remainder, 100 gram pet copolyesters 2 (are the Uralac SH974 resins of being produced by DSM N. V., molecular weight is 15000, Tg is 47 ℃, viscosity is 27 seconds), the 65 diacid vulcabond of restraining oneself, the highly methyl etherified melamine resin of 10 grams, 3 gram triethylamines, 20 gram epoxy phosphate compounds (molecular weight 500) and 66 gram N-BUTYL ACETATEs and 44 gram diesters mix, under agitation ground mill base is slowly added in the container of above-mentioned premix honest material, promptly get primer solution.
Performance test is as follows:
| Project | Performance test |
| Viscosity S | 30 |
| Quality solids content % | 56 |
| The highest metal sheet temperature (PMT) ℃ | 241 |
| Set time S | 23 |
| Film thickness μ m | 6 |
| Crooked T | 1 |
| Pencil hardness | F |
| Shock strength J | 9.04 |
| (MEK) is inferior for solvent resistance | 20 |
。
Claims (9)
1, a kind of coiled material polyurethane primer is characterized in that it is to be mixed by following each component, and each component and weight % content are:
Component weight %
Vibrin 1 30-50
Vibrin 2 20-20
Linking agent 6-8
Pigment 20-30
Epoxy phosphate compound 1-5
Curing catalysts 0.2-1
Solvent 12-20
Described vibrin 1 is polymerized under the effect of catalyzer by the mixture of polyvalent alcohol, the mixture of polyprotonic acid, then with solvent to rare, each component and weight % content are:
Component weight %
Polyol blends 25-35
Polyprotonic acid mixture 15-20
Catalyzer 0.2-0.3
To rare solvent 44.7-59.8 that uses
The component of described polyol blends and weight % content are
Component weight %
Neopentyl glycol 50-75
Methyl propanediol 0-25
Tertiary carbonic acid glycidyl ester 0-25
The component of described polyprotonic acid mixture and weight % content are
Component weight %
Hexanodioic acid 10-20
M-phthalic acid 40-60
Terephthalic acid 10-20
Phthalic anhydride 0-15
Trimellitic acid 1,2-anhydride 0-5
Described catalyzer is an organotin catalysts, is selected from dibutyl tin laurate, dimethyl oxalic acid tin or dibutyl tin acetate,
Described in the vibrin 1 be to rare component and weight % content with solvent
Component weight %
Dimethylbenzene 0-5
The heavy aromatic solvent 50-70 of C9-C10
1-Methoxy-2-propyl acetate 10-25
Butyl glycol ether 0-10
Diester 0-15
Described diester is made up of with weight ratio dimethyl succinate, Methyl glutarate and dimethyl adipate at 1: 1: 1;
Described vibrin 2 is Uralac SH974 resins of being produced by DSM N. V.;
Described linking agent comprises masked isocyanate and aminoresin, and the part by weight of masked isocyanate and aminoresin is 6-8: 1.
2, coiled material polyurethane primer according to claim 1 is characterized in that described vibrin 1 is linear vibrin, and molecular weight is 6000-10000, Tg is 30-40 ℃, and viscosity is 20-45 second, and the molecular weight of vibrin 2 is 15000, Tg is 47 ℃, and viscosity is 27 seconds.
3, coiled material polyurethane primer according to claim 1 is characterized in that the masked isocyanate in the described linking agent is to be selected from hexamethylene diisocyanate, tolylene diisocyanate or hexanodioic acid vulcabond.
4, coiled material polyurethane primer according to claim 1 is characterized in that the aminoresin in the described linking agent is to be selected from highly methyl etherified melamine resin, methyl etherified high imino-melamine resin or part methyl etherify melamine resin.
5, coiled material polyurethane primer according to claim 1, it is characterized in that described pigment comprises titanium dioxide powder and corrosion-inhibiting pigment, titanium dioxide powder is a rutile-type, corrosion-inhibiting pigment is selected from zinc-chrome yellow, strontium chromate or yellow barium chromate, and the part by weight of titanium dioxide powder and corrosion-inhibiting pigment is 1.2-1.6: 1.
6, coiled material polyurethane primer according to claim 1 is characterized in that described epoxy phosphate compound molecular weight is 300-5000.
7, coiled material polyurethane primer according to claim 1, it is characterized in that described curing catalysts is the organotin catalysts that is selected from dibutyl tin laurate, dimethyl oxalic acid tin or dibutyl tin acetate, or for being selected from the compound that contains amine of triethylamine, diazabicylo [2.2.2] octane or an azabicyclic [2.2.2] octane.
8, coiled material polyurethane primer according to claim 1 is characterized in that component solvent in the described priming paint is the mixture that is selected from 1-Methoxy-2-propyl acetate, N-BUTYL ACETATE, butyl glycol ether, diester or the dimethylbenzene two or more.
9, coiled material polyurethane primer according to claim 8 is characterized in that described solvent diester is made up of with weight ratio dimethyl succinate, Methyl glutarate and dimethyl adipate at 1: 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254193A CN100358957C (en) | 2005-04-26 | 2005-04-26 | Polyurethane base paint for coiled material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254193A CN100358957C (en) | 2005-04-26 | 2005-04-26 | Polyurethane base paint for coiled material |
Publications (2)
| Publication Number | Publication Date |
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| CN1702133A CN1702133A (en) | 2005-11-30 |
| CN100358957C true CN100358957C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100254193A Expired - Fee Related CN100358957C (en) | 2005-04-26 | 2005-04-26 | Polyurethane base paint for coiled material |
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Cited By (1)
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|---|---|---|---|---|
| CN103044998A (en) * | 2012-12-05 | 2013-04-17 | 燕山大学 | Magnesium alloy anti-corrosive coating suitable for sea fog environments and method for preparing magnesium alloy anti-corrosive coating suitable for sea fog environments |
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| CN100352873C (en) * | 2005-12-26 | 2007-12-05 | 中国化工建设总公司常州涂料化工研究院 | Matched coating for aluminium alloy base material |
| CN101735725A (en) * | 2008-11-21 | 2010-06-16 | 上海振华造漆厂 | Environment-friendly polyurethane primer used universally by coiled materials and application thereof |
| CN101735713B (en) * | 2008-11-21 | 2013-11-06 | 上海振华造漆厂 | Polyester coating for outer wall of steel drum and preparation method as well as application thereof |
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| CN102115527A (en) * | 2010-12-10 | 2011-07-06 | 天津市新宇彩板有限公司 | Neopentyl glycol resin |
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| CN105670486A (en) * | 2016-03-07 | 2016-06-15 | 广州立邦涂料有限公司 | Acid and alkali resistant polyurethane primer and preparation method thereof |
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| CN111004375A (en) * | 2019-12-19 | 2020-04-14 | 广州立邦涂料有限公司 | High-gloss polyester resin for coil steel household appliance finish and preparation method and application thereof |
| CN111534191B (en) * | 2020-04-17 | 2021-12-17 | 立邦工业涂料(上海)有限公司 | Salt-fog-resistant primer for coiled material household appliance |
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2005
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Patent Citations (6)
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| US5688598A (en) * | 1996-06-28 | 1997-11-18 | Morton International, Inc. | Non-blistering thick film coating compositions and method for providing non-blistering thick film coatings on metal surfaces |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103044998A (en) * | 2012-12-05 | 2013-04-17 | 燕山大学 | Magnesium alloy anti-corrosive coating suitable for sea fog environments and method for preparing magnesium alloy anti-corrosive coating suitable for sea fog environments |
| CN103044998B (en) * | 2012-12-05 | 2015-06-10 | 燕山大学 | Magnesium alloy anti-corrosive coating suitable for sea fog environments and method for preparing magnesium alloy anti-corrosive coating suitable for sea fog environments |
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