CN101560291A - Saturated carboxyl polyester resin with low acid value for powder coating and synthetic method thereof - Google Patents
Saturated carboxyl polyester resin with low acid value for powder coating and synthetic method thereof Download PDFInfo
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- CN101560291A CN101560291A CNA2009100986823A CN200910098682A CN101560291A CN 101560291 A CN101560291 A CN 101560291A CN A2009100986823 A CNA2009100986823 A CN A2009100986823A CN 200910098682 A CN200910098682 A CN 200910098682A CN 101560291 A CN101560291 A CN 101560291A
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- polyester resin
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Abstract
The invention discloses a saturated carboxyl polyester resin with low acid value. The acid value of the resin is 20 to 25 mg KOH/g, the number average molecular weight is 5,000 to 7,000, and the glass transition temperature is between 50 and 70 DEG C. In the presence of a butyl stannic acid catalyst and under the protection of nitrogen, polyatomic acid and polylol are subjected to direct melting, esterification and polycondensation reaction to synthesize the saturated carboxyl polyester resin. The synthetic process is simple; the saturated carboxyl polyester resin with low acid value is used to prepare powder coating, the using amount of a required curing agent is low, generally, and the ratio of the saturated carboxyl polyester resin with low acid value to the curing agent is 95 to 5, so the saturated carboxyl polyester resin with low acid value and the synthetic method reduce the using amount of the curing agent and the cost, and is favorable for environmental protection. Simultaneously, the powder coating containing the saturated carboxyl polyester resin with low acid value can be dry-mixed with a powder coating prepared by polyester containing high acid value according to different ratios to obtain sub-optical powder coatings with different glosses.
Description
Technical field
The present invention relates to the saturated carboxyl polyester resin with low acid value and the synthetic method thereof of used for powder coating.
Background technology
The solid coating that powder coating is made up of vibrin, solidifying agent, pigment, filler and auxiliary agent.Powder coating has the following advantages: (1) system is solid-state, has solvent-free, pollution-free, VOC free discharging, low-cost and remarkable distinct advantages such as environmental benefit; (2) film behind overcuring, the hardness height, mechanical property, weather resistance and chemical resistance are fine; (3) the spraying property excellence of powder coating; (4) the powder coating storge quality is stable.
The vibrin solidifying agent of using in the powder coating at present commonly used is triglycidyl isocyanurate (TGIC), it all has hypertoxicity to the respiratory system and the Digestive tract of human body, eye there is hormesis, skin and nasal cavity there is minimal irritation, there is potential to destroy and carcinogenic etc. to human body, so too much use triglycidyl isocyanurate (TGIC), can influence people's health, environment also there is certain pollution.Along with the rise of oil price, the price of triglycidyl isocyanurate (TGIC) climbs up and up, and the low acid number saturated polyester resin of the low hardener dose of exploitation becomes the effective way that reduces cost.
Summary of the invention
The purpose of this invention is to provide a kind of saturated carboxyl polyester resin with low acid value and synthetic method thereof that is used for powder coating.
The saturated carboxyl polyester resin with low acid value of used for powder coating of the present invention, its acid number are 20-25mgKOH/g, and number-average molecular weight is 5,000-7, and 000, second-order transition temperature is 50-70 ℃.
The synthetic method of saturated carboxyl polyester resin with low acid value; it is characterized in that existing at the butyl stannonic acid catalyzer; under the nitrogen protection; by polyprotonic acid and the direct fusion esterification polycondensation of polyvalent alcohol 12-16 hour; temperature of reaction is 190-240 ℃, and wherein, the content of the amount of substance of polyprotonic acid is 50%-60%; the content of the amount of substance of polyvalent alcohol is 40%-50%, and butyl stannonic acid is the 0.01-0.02% of polyprotonic acid and polyvalent alcohol gross weight.
Among the present invention, said polyprotonic acid can be a kind of or its mixture in terephthalic acid, m-phthalic acid and the hexanodioic acid.Polyvalent alcohol is a kind of or its mixture in neopentyl glycol and the TriMethylolPropane(TMP).
Advantage: synthesis technique of the present invention is simple, prepare powder coating with saturated carboxyl polyester resin with low acid value of the present invention, required hardener dose is low, generally, saturated carboxyl polyester resin with low acid value and solidifying agent ratio are 95: 5, reduce the usage quantity of solidifying agent, not only reduce cost, and help environmental protection.Simultaneously, the powder coating that contains saturated carboxyl polyester resin with low acid value can mix by different ratios is dried with the powder coating that contains the high acid value polyester, obtains the matt powder coating of various luster.
Embodiment
Embodiment 1
Exist at the butyl stannonic acid catalyzer; under the nitrogen protection; in the polyester synthesis reaction vessel, add the neopentyl glycol of 45% amount of substance and the terephthalic acid of 41% amount of substance; the m-phthalic acid of 11% amount of substance; the direct fusion esterification polycondensation of the hexanodioic acid of 3% amount of substance 12 hours, the temperature of esterifying polycondensation reaction is 240 ℃, wherein; butyl stannonic acid accounts for 0.01% of above-mentioned reaction mass gross weight, obtains the saturated carboxyl polyester resin of low acid number.
The acid number of the saturated carboxyl polyester resin with low acid value of this routine gained is 25mg KOH/g, and number-average molecular weight is 5200, and second-order transition temperature is 60 ℃.
Embodiment 2
Exist at the butyl stannonic acid catalyzer; under the nitrogen protection; in the polyester synthesis reaction vessel, add the neopentyl glycol of TriMethylolPropane(TMP), 40% amount of substance of 5% amount of substance and the terephthalic acid of 39% amount of substance; the m-phthalic acid of 16% amount of substance; the direct fusion esterification polycondensation of the hexanodioic acid of 3% amount of substance 16 hours; the temperature of esterifying polycondensation reaction is 190 ℃; wherein; butyl stannonic acid accounts for 0.01% of above-mentioned reaction mass gross weight, obtains the saturated carboxyl polyester resin of low acid number.
The acid number of the saturated carboxyl polyester resin with low acid value of this routine gained is 20mg KOH/g, and number-average molecular weight is 7500, and second-order transition temperature is 70 ℃.
Embodiment 3
Exist at the butyl stannonic acid catalyzer; under the nitrogen protection; in the polyester synthesis reaction vessel, add the neopentyl glycol of TriMethylolPropane(TMP), 46% amount of substance of 2% amount of substance and the terephthalic acid of 40% amount of substance; the m-phthalic acid of 10% amount of substance; the direct fusion esterification polycondensation of the hexanodioic acid of 2% amount of substance 15 hours; the temperature of esterifying polycondensation reaction is 230 ℃; wherein; butyl stannonic acid accounts for 0.02% of above-mentioned reaction mass gross weight, obtains the saturated carboxyl polyester resin of low acid number.
The acid number of the saturated carboxyl polyester resin with low acid value of this routine gained is 22mg KOH/g, and number-average molecular weight is 6300, and second-order transition temperature is 66 ℃.
Embodiment 4
Exist at the butyl stannonic acid catalyzer; under the nitrogen protection; in the polyester synthesis reaction vessel, add the neopentyl glycol of 42% amount of substance and the terephthalic acid of 37% amount of substance; the m-phthalic acid of 10% amount of substance; the direct fusion esterification polycondensation of the hexanodioic acid of 11% amount of substance 12 hours, the temperature of esterifying polycondensation reaction is 240 ℃, wherein; butyl stannonic acid accounts for 0.02% of above-mentioned reaction mass gross weight, obtains the saturated carboxyl polyester resin of low acid number.
The acid number of the saturated carboxyl polyester resin with low acid value of this routine gained is 23mg KOH/g, and number-average molecular weight is 5700, and second-order transition temperature is 50 ℃.
Claims (4)
1, a kind of saturated carboxyl polyester resin with low acid value of used for powder coating, the acid number that it is characterized in that it is 20-25mg KOH/g, number-average molecular weight is 5,000-7,000, second-order transition temperature is 50-70 ℃.
2, the synthetic method of saturated carboxyl polyester resin with low acid value according to claim 1; it is characterized in that existing at the butyl stannonic acid catalyzer; under the nitrogen protection; by polyprotonic acid and the direct fusion esterification polycondensation of polyvalent alcohol 12-16 hour; temperature of reaction is 190-240 ℃, and wherein, the content of the amount of substance of polyprotonic acid is 50%-60%; the content of the amount of substance of polyvalent alcohol is 40%-50%, and butyl stannonic acid is the 0.01-0.02% of polyprotonic acid and polyvalent alcohol gross weight.
3, the synthetic method of saturated carboxyl polyester resin with low acid value according to claim 2 is characterized in that polyprotonic acid is a kind of or its mixture in terephthalic acid, m-phthalic acid and the hexanodioic acid.
4, the synthetic method of saturated carboxyl polyester resin with low acid value according to claim 2 is characterized in that polyvalent alcohol is a kind of or its mixture in neopentyl glycol and the TriMethylolPropane(TMP).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100986823A CN101560291A (en) | 2009-05-21 | 2009-05-21 | Saturated carboxyl polyester resin with low acid value for powder coating and synthetic method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100986823A CN101560291A (en) | 2009-05-21 | 2009-05-21 | Saturated carboxyl polyester resin with low acid value for powder coating and synthetic method thereof |
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| CN101560291A true CN101560291A (en) | 2009-10-21 |
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| CNA2009100986823A Pending CN101560291A (en) | 2009-05-21 | 2009-05-21 | Saturated carboxyl polyester resin with low acid value for powder coating and synthetic method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504218A (en) * | 2011-10-17 | 2012-06-20 | 扬州市欣宝树脂有限公司 | Method for preparing polyester resin for high-gloss outdoor powder coating |
| CN104403092A (en) * | 2014-12-15 | 2015-03-11 | 天津凯华绝缘材料股份有限公司 | Polyester curing agent with hyperbranched structure and synthetic method of polyester curing agent |
| CN105418901A (en) * | 2015-12-18 | 2016-03-23 | 浙江中法新材料有限公司 | High temperature resistant polyester resin with low usage amount of TGIC (triglycidyl isocyanurate) for powder coating and preparation method of high temperature resistant polyester resin |
| CN105419609A (en) * | 2015-11-06 | 2016-03-23 | 广州擎天材料科技有限公司 | Extra-weather-resistant matt fluorocarbon-polyester composite powder coating and preparation method thereof |
| CN106750209A (en) * | 2016-12-12 | 2017-05-31 | 衡阳山泰化工有限公司 | A kind of Heat Resistant Powder Coatings polyester resin and preparation method thereof |
| CN107602826A (en) * | 2017-08-18 | 2018-01-19 | 帝兴树脂(昆山)有限公司 | The polyester resin for powder coating of TGIC solidifications and the powder paint compositions comprising polyester resin |
| CN108300184A (en) * | 2017-09-05 | 2018-07-20 | 湖州加成金属涂料有限公司 | A kind of ventilation powder coating and preparation method |
| CN112322155A (en) * | 2020-11-20 | 2021-02-05 | 黄山市徽州康佳化工有限责任公司 | Polyester resin with low TGIC consumption and excellent low-temperature resistance for powder coating and preparation method thereof |
| CN113461922A (en) * | 2021-07-28 | 2021-10-01 | 安徽永利新材料科技有限公司 | Low-acid-value polyester resin for ultralow-temperature curing powder coating and preparation method thereof |
-
2009
- 2009-05-21 CN CNA2009100986823A patent/CN101560291A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504218A (en) * | 2011-10-17 | 2012-06-20 | 扬州市欣宝树脂有限公司 | Method for preparing polyester resin for high-gloss outdoor powder coating |
| CN104403092A (en) * | 2014-12-15 | 2015-03-11 | 天津凯华绝缘材料股份有限公司 | Polyester curing agent with hyperbranched structure and synthetic method of polyester curing agent |
| CN105419609A (en) * | 2015-11-06 | 2016-03-23 | 广州擎天材料科技有限公司 | Extra-weather-resistant matt fluorocarbon-polyester composite powder coating and preparation method thereof |
| CN105418901A (en) * | 2015-12-18 | 2016-03-23 | 浙江中法新材料有限公司 | High temperature resistant polyester resin with low usage amount of TGIC (triglycidyl isocyanurate) for powder coating and preparation method of high temperature resistant polyester resin |
| CN105418901B (en) * | 2015-12-18 | 2017-06-06 | 浙江中法新材料有限公司 | High temperature resistance polyester resin used for powder coating of low TGIC consumptions and preparation method thereof |
| CN106750209A (en) * | 2016-12-12 | 2017-05-31 | 衡阳山泰化工有限公司 | A kind of Heat Resistant Powder Coatings polyester resin and preparation method thereof |
| CN107602826A (en) * | 2017-08-18 | 2018-01-19 | 帝兴树脂(昆山)有限公司 | The polyester resin for powder coating of TGIC solidifications and the powder paint compositions comprising polyester resin |
| CN108300184A (en) * | 2017-09-05 | 2018-07-20 | 湖州加成金属涂料有限公司 | A kind of ventilation powder coating and preparation method |
| CN112322155A (en) * | 2020-11-20 | 2021-02-05 | 黄山市徽州康佳化工有限责任公司 | Polyester resin with low TGIC consumption and excellent low-temperature resistance for powder coating and preparation method thereof |
| CN113461922A (en) * | 2021-07-28 | 2021-10-01 | 安徽永利新材料科技有限公司 | Low-acid-value polyester resin for ultralow-temperature curing powder coating and preparation method thereof |
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Open date: 20091021 |