CN100340587C - Polyester resin for priming lacquer of coiled material and preparation method thereof - Google Patents
Polyester resin for priming lacquer of coiled material and preparation method thereof Download PDFInfo
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- CN100340587C CN100340587C CNB2005100254206A CN200510025420A CN100340587C CN 100340587 C CN100340587 C CN 100340587C CN B2005100254206 A CNB2005100254206 A CN B2005100254206A CN 200510025420 A CN200510025420 A CN 200510025420A CN 100340587 C CN100340587 C CN 100340587C
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Abstract
The present invention relates to a polyester resin used for coil primer and a method for preparing the polyester resin. The polyester resin is prepared by the polymerization of polyalcohol mixtures and polyacid mixtures under the catalytic action of an organic tin catalyst. Then, the polyester resin is diluted with a solvent until the solid content is from 40 to 55%. The paint films obtained after the crosslink of the polyester resin have high flexibility; the curvature T can reach 0 to 2T; simultaneously, because the hydroxyl value reaches 32 to 40 mgKOH/g, the crosslinking density is high, and the solvent resistance (MEK) can reach 20 times. When the polyester resin is spread, the polyester resin has good blocking resistance and no paint blocking phenomenon.
Description
Technical field
The present invention relates to polyester resin for priming lacquer of coiled material and preparation method thereof.
Background technology
The vibrin that the priming lacquer of coiled material of existing market supply is used is to be formed by polyvalent alcohol and polyprotonic acid esterification.Molecular weight is in the 15000-20000 scope, and Tg is in 40-55 ℃ of scope, and hydroxyl value has good snappiness and pencil hardness in the 5-20mgKOH/g scope.But because hydroxyl value is on the low side, cross-linking density is relatively poor, causes the resistance to blocking of priming lacquer of coiled material bad, occurs sticking lacquer phenomenon during application.
Summary of the invention
The invention provides a kind of novel polyester resin for priming lacquer of coiled material and preparation method thereof.This vibrin is by reaching the linear polyester resin of two terminal hydroxy group with alcohol excess when synthetic, and hydroxyl value is higher.Have excellent flexibility and higher cross-linking density after this vibrin is crosslinked, overcome the defective of resistance to blocking in the background technology.
Technical scheme of the present invention is as follows:
Polyester resin for priming lacquer of coiled material of the present invention 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
Solvent 44.7-59.8
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.
The component of described solvent and weight % content are
Component weight %
Dimethylbenzene 0-5
Heavy aromatic solvent (C9-C10) 50-70
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 polyester resin for priming lacquer of coiled material of the present invention 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 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 |
Polyester resin for priming lacquer of coiled material of the present invention is the linear polyester resin by two terminal hydroxy group that reach with alcohol excess when synthetic.Has good flexible with masked isocyanate and the amino resin crosslinked paint film that gets, T is curved can to reach 0-2T, simultaneously because hydroxyl value reaches 32-40mgKOH/g, cross-linking density is higher, solvent resistance (MEK) can reach 20 times, and during application, resistance to blocking is better, sticking lacquer phenomenon can not occur, overcome the defective of existing vibrin product.
Embodiment:
Embodiment 1, neopentyl glycol with 187.5 kilograms, 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%, filter packing.
Performance test is as follows:
| Project | Test result |
| Quality solids content % | 40 |
| Viscosity second | 30 |
| Acid number mgKOH/g | 2 |
| Molecular weight | 8000 |
| Second-order transition temperature ℃ | 35 |
| Hydroxyl value mgKOH/g | 34 |
Embodiment 2, neopentyl glycol with 262.5 kilograms, 87.5 kilogram tertiary carbonic acid glycidyl ester, 40 kilograms hexanodioic acid, 120 kilograms m-phthalic acid, 30 kilograms of terephthalic acids, 10 kilograms trimellitic acid 1,2-anhydride adds reactor, slowly be heated to 200 ℃, treat to add 3 kilograms of dimethyl oxalic acid tin catalysts after the fusion, continue to be heated to 230 ℃, the reaction times was controlled at 8 hours, final reaction reaches acid number 1.8mgKOH/g, viscosity 32 seconds, 44 kilograms of aquifer yields are used 248.4 kilopond aromatic solvents (C9-C10) then, 82.8 kilogram 1-Methoxy-2-propyl acetate, 41.4 kg ethylene glycol butyl ether and 41.4 kilograms of diesters, filter to solids content 55% rare, packing.
Performance test is as follows:
| Project | Test result |
| Quality solids content % | 55 |
| Viscosity second | 32 |
| Acid number mgKOH/g | 1.8 |
| Molecular weight | 9000 |
| Second-order transition temperature ℃ | 36 |
| Hydroxyl value mgKOH/g | 40 |
Embodiment 3, neopentyl glycol with 150 kilograms, 75 kilograms methyl propanediol, 75 kilograms of tertiary carbonic acid glycidyl esters, 35 kilograms hexanodioic acid, 87.5 the m-phthalic acid of kilogram, 26.25 the terephthalic acid of kilogram, 17.5 kilograms of phthalic anhydrides, 8.75 kilograms trimellitic acid 1,2-anhydride adds reactor, slowly be heated to 180 ℃, treat to add 2.5 kilograms of dibutyl tin acetate catalyzer after the fusion, continue to be heated to 250 ℃, the reaction times was controlled at 6 hours, final reaction reaches acid number 1.6mgKOH/g, viscosity 36 seconds, 38 kilograms of aquifer yields are used 22 kilograms of dimethylbenzene then, 306 kilopond aromatic solvents (C9-C10), 109 kilograms of 1-Methoxy-2-propyl acetates, filter to solids content 50% rare, packing.
Performance test is as follows:
| Project | Test result |
| Quality solids content % | 50 |
| Viscosity second | 36 |
| Acid number mgKOH/g | 1.6 |
| Molecular weight | 10000 |
| Second-order transition temperature ℃ | 37 |
| Hydroxyl value mgKOH/g | 32 |
Claims (2)
1, a kind of polyester resin for priming lacquer of coiled material is characterized in that it is by following component: polyol blends, the polymerization under the effect of organotin catalysts of polyprotonic acid mixture, then with solvent to rare and make, each component and weight % content are:
Component weight %
Polyol blends 25-35
Polyprotonic acid mixture 15-20
Organotin catalysts 0.2-0.3
Solvent 44.7-59.8;
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 organotin catalysts is selected from dibutyl tin laurate, dimethyl oxalic acid tin or dibutyl tin acetate;
Described solvent component and weight % content are:
Component weight %
Dimethylbenzene 0-5
The heavy aromatic solvent 50-70 that contains 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.
2, the preparation method of the described polyester resin for priming lacquer of coiled material of claim 1, it is characterized in that the polyprotonic acid mixture, polyol blends is heated to 150-200 ℃, add organotin catalysts again, continue to be heated to 230-250 ℃, reaction times 5-10 hour, then with solvent to rare to solids content 40-55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254206A CN100340587C (en) | 2005-04-26 | 2005-04-26 | Polyester resin for priming lacquer of coiled material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254206A CN100340587C (en) | 2005-04-26 | 2005-04-26 | Polyester resin for priming lacquer of coiled material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1687177A CN1687177A (en) | 2005-10-26 |
| CN100340587C true CN100340587C (en) | 2007-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100254206A Expired - Fee Related CN100340587C (en) | 2005-04-26 | 2005-04-26 | Polyester resin for priming lacquer of coiled material and preparation method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406494C (en) * | 2006-12-06 | 2008-07-30 | 上海振华造漆厂 | Epoxy modified polyester resin for paint of coil back surface and its preparation method |
| CN101148496B (en) * | 2007-10-26 | 2010-05-19 | 上海振华造漆厂 | Polyester resin for coiled material finishing paint and its preparing process |
| 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 |
| CN101921520B (en) * | 2009-06-12 | 2013-02-13 | 上海天地涂料有限公司 | Anti-asphalt paint, composite polyester resin and preparation methods thereof |
| CN102002151B (en) * | 2009-08-31 | 2013-01-23 | 无锡市金箭造漆有限公司 | High-solid type polyester resin and coil coating and preparation method of high-solid type polyester resin and coil coating |
| CN102115527A (en) * | 2010-12-10 | 2011-07-06 | 天津市新宇彩板有限公司 | Neopentyl glycol resin |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620801A (en) * | 1993-12-24 | 1997-04-15 | Bhp Steel (Jla) Pty. Ltd. | Thermosetting polyester resin |
| WO1999060067A1 (en) * | 1998-12-30 | 1999-11-25 | Eastman Chemical Company | The use of 1,4-cyclohexanedicarboxylic acid as a means of improving flow properties and broadening cure window of polyester powder coating enamel |
-
2005
- 2005-04-26 CN CNB2005100254206A patent/CN100340587C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5620801A (en) * | 1993-12-24 | 1997-04-15 | Bhp Steel (Jla) Pty. Ltd. | Thermosetting polyester resin |
| WO1999060067A1 (en) * | 1998-12-30 | 1999-11-25 | Eastman Chemical Company | The use of 1,4-cyclohexanedicarboxylic acid as a means of improving flow properties and broadening cure window of polyester powder coating enamel |
Non-Patent Citations (1)
| Title |
|---|
| 卷材用环氧聚氨酯底漆的研制和应用 胡靖 罗志刚 王须苟 常霞俊，上海涂料，第41卷第01期 2003 * |
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|---|---|
| CN1687177A (en) | 2005-10-26 |
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Effective date of registration: 20100205 Address after: No. 345 South Shaanxi Road, Shanghai Patentee after: Shanghai Paint Co., Ltd. Address before: No. 1167, Gulang Road, Shanghai Patentee before: Shanghai Chenhua Paint MFG. Co. |
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