CN106634399A - Technological method of preparation of low-temperature curing heavy-duty epoxy powder coating - Google Patents
Technological method of preparation of low-temperature curing heavy-duty epoxy powder coating Download PDFInfo
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- CN106634399A CN106634399A CN201510722453.XA CN201510722453A CN106634399A CN 106634399 A CN106634399 A CN 106634399A CN 201510722453 A CN201510722453 A CN 201510722453A CN 106634399 A CN106634399 A CN 106634399A
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Abstract
The invention discloses a technological method of preparation of a low-temperature curing heavy-duty epoxy powder coating, and the technological method comprises the following steps: A, pulverizing epoxy resin into a fine-particle powder by using a pulverizing apparatus, and then adding other auxiliaries; B, mixing the epoxy resin powder and the auxiliaries, and performing uniform stirring; C, putting the uniformly-stirred mixture in a heating and pressurizing apparatus with the temperature of 100-103 DEG C, and performing heating and pressurizing, so as to obtain a semi-finished product, wherein the time of the heating and pressurizing process is not less than 20 minutes, and the obtained semi-finished product is flaky; D, pulverizing the flaky semi-finished product obtained in the step C, and then adding a polypropylene filler with the weight ratio of 2-3% and a pigment with the weight ratio of 3-5% after pulverization; E, stirring the mixture obtained in the step D and sieving the mixture with a sieve; and F, checking the sieved epoxy-powder coating, and performing packaging. The technological method enriches the application fields of the epoxy powder coating, saves the processes of the later-stage use of the epoxy powder coating, and guarantees relatively good application performance of the epoxy powder coating.
Description
Technical field
The present invention relates to epoxide powder coating technical field, more particularly to prepares the process of low-temperature setting heavy corrosion protection epoxy powder coating.
Background technology
Epoxide powder coating, due to the solidification temperature of powdex higher (180～220 DEG C), hardening time length (10～30min) so as to be applicable only to the resistant substrates such as metal, and relative energy consumption is big, time-consuming；And have certain overlap because it melts levelling and solidification incipient stage, the problems such as control bad, coating just occurs the defect in flatness, such as shrinkage cavity, tangerine peel.UV cured powder paints and low temperature cured powder coating are used for heat-sensitive substrate material for this people's focus development.
Generally speaking, the melt temperature of powdery paints is 90～130 DEG C, solidification temperature is 130～180 DEG C, but increasing application needs low-temperature setting, so the research and development of low temperature cured powder coating also become a kind of trend, the solidification temperature of some epoxy powder coatings is reduced to 140 DEG C, and what is had even has dropped down to 120 DEG C, while hardening time also foreshortens to 20min, so as to greatly save energy.General solidification temperature often reduces by 10 DEG C, and coating process can save 10% energy.
But because the color of epoxide powder coating is relatively simple, use it on hardware, also need to finish pigment in addition, late stage process is complex, using not aspect.Therefore in order to save time of the later stage using technique, it is easy to it to apply, and improves the preparation efficiency of epoxide powder coating, following process of preparing is proposed hereby.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides preparing the process of low-temperature setting heavy corrosion protection epoxy powder coating, its object is to increase the color diversity of epoxide powder coating, on the one hand the application of epoxide powder coating is enriched, on the other hand technique of the epoxide powder coating in later stage use is saved, it is ensured that it has preferable application performance.
The technical solution adopted in the present invention is：The process of low-temperature setting heavy corrosion protection epoxy powder coating is prepared, is comprised the steps：
A. epoxy resin is ground into by particulate powders using disintegrating apparatus, is subsequently adding other auxiliary agents, auxiliary agent includes curing agent, defoamer, levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter；
B. after above-mentioned epoxy powder and auxiliary agent mix, it is stirred for uniformly using mixing plant；
C. the said mixture for stirring is placed in 100 degree to 103 degree of temperature-pressure equipment is carried out plus gentle pressing technology, and the process step time is no less than 20 minutes, and the semi-finished product for obtaining are sheet；
D. the sheet semi-finished product obtained in step C are crushed, crushing increases weight ratio for the polypropylene filler of 2-3% and the pigment of 3-5% in it after terminating；
E. the mixture for obtaining in whipping step D, and it is sieved using sieve；
F. the epoxide powder coating censorship for obtaining is sieved, and is packed.
The process of the present invention, using epoxy resin as raw material, increase various auxiliary agents and pigment and filler in it, with the addition of curing agent, defoamer and many middle auxiliary agents, wherein auxiliary agent includes levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter, sub- light characteristic, weatherability, mobility of epoxide powder coating etc. are improve, and reduces solidification temperature to 102 °C, hardening time foreshortens to 15min.And the epoxy powder that with the addition of various auxiliary agents has been carried out into temperature-pressure, make its solidified forming, ensure that the various physics and mechanical performance of epoxy powder, increase weight polycaprolactone ratio in it for the polypropylene filler of 2-3% and the pigment of 3-5% again afterwards, so that epoxide powder coating has more superior color characteristics and increased the performance of its impact resistance, Anti-scattering, its performance is finally improved.
Further improvement of the present invention is that the epoxy resin in step A accounts for the 60%-65% of weight ratio.
Further improvement of the present invention is that epoxy resin is bisphenol A type epoxy resin, and bisphenol A type epoxy resin is one or more in E-20, E-12, E-06, so as to have wider practicality.
Further improvement of the present invention is that the auxiliary formula in step A is：Curing agent 10%-16%, defoamer 1.5%-3%, levelling agent 0.9%-1.8%, anti-skinning agent 0.6%-1.9%, delustering agent 5%-8%, light stabilizer 1%-3%, dispersant 0.8%-2%, mould inhibitor 0.6%-0.9%, fluorine 0.1-1.8% and adhesion promoter 0.5 ~ 1.0%.
Further improvement of the present invention is that curing agent is amine hardener, and its weight ratio is 12%-15%.Because amine hardener has higher activity, can simultaneously serve as the curing agent of cross-linking reaction, so as to improve the efficiency of self-emulsifying, shorten the time of self-emulsifying, curing agent is amine hardener, its weight, with higher vigor and cross-linking reaction ability, shortens hardening time than preferably 12%-15%.
Further improvement of the present invention is, in order to reduce the preparation temperature of the formula, to shorten preparation time, and fluorine is added into above-mentioned formula with the state of fluorin radical.And fluorin radical can be replaced with fluorosulfonic acid groups.
Compared with prior art, the invention has the beneficial effects as follows：First, using epoxy resin as raw material, increase various auxiliary agents and pigment and filler in it, with the addition of curing agent, defoamer and many middle auxiliary agents, wherein auxiliary agent includes levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter, sub- light characteristic, weatherability, mobility of epoxide powder coating etc. are improve, and reduces solidification temperature to 102 °C, hardening time foreshortens to 15min.
In addition, the present invention with the addition of various auxiliary agents in its formula, and temperature-pressure will have been carried out after these auxiliary agents and epoxy powder mixing and stirring, make its solidified forming, ensure that the various physics and mechanical performance of epoxy powder, increase weight polycaprolactone ratio in it for the polypropylene filler of 2-3% and the pigment of 3-5% again afterwards so that epoxide powder coating has more superior color characteristics and increased the performance of its impact resistance, Anti-scattering, finally improves its performance.
The epoxy powder its preparation process of the present invention, increased the color diversity of epoxide powder coating, on the one hand the application of epoxide powder coating is enriched, technique of the epoxide powder coating in later stage use is on the other hand saved, it is ensured that it has preferable application performance.
Specific embodiment
In order to deepen the understanding of the present invention, with reference to embodiment, the present invention is further described, and the embodiment is only used for explaining the present invention, protection scope of the present invention is not constituted and is limited.
The process of low-temperature setting heavy corrosion protection epoxy powder coating is prepared, is comprised the steps：
A. epoxy resin is ground into by particulate powders using disintegrating apparatus, is subsequently adding other auxiliary agents, auxiliary agent includes curing agent, defoamer, levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter；
B. after above-mentioned epoxy powder and auxiliary agent mix, it is stirred for uniformly using mixing plant；
C. the said mixture for stirring is placed in 100 degree to 103 degree of temperature-pressure equipment is carried out plus gentle pressing technology, and the process step time is no less than 20 minutes, and the semi-finished product for obtaining are sheet；
D. the sheet semi-finished product obtained in step C are crushed, crushing increases weight ratio for the polypropylene filler of 2-3% and the pigment of 3-5% in it after terminating；
E. the mixture for obtaining in whipping step D, and it is sieved using sieve；
F. the epoxide powder coating censorship for obtaining is sieved, and is packed.
In the above-described embodiments, the epoxy resin in step A accounts for the 60%-65% of weight ratio.In the above-described embodiments, epoxy resin is bisphenol A type epoxy resin, and bisphenol A type epoxy resin is one or more in E-20, E-12, E-06, so as to have wider practicality.In the above-described embodiments, the auxiliary formula in step A is：Curing agent 10%-16%, defoamer 1.5%-3%, levelling agent 0.9%-1.8%, anti-skinning agent 0.6%-1.9%, delustering agent 5%-8%, light stabilizer 1%-3%, dispersant 0.8%-2%, mould inhibitor 0.6%-0.9%, fluorine 0.1-1.8% and adhesion promoter 0.5 ~ 1.0%.
In the above-described embodiments, curing agent is amine hardener, and its weight ratio is 12%-15%.Because amine hardener has higher activity, can simultaneously serve as the curing agent of cross-linking reaction, so as to improve the efficiency of self-emulsifying, shorten the time of self-emulsifying, curing agent is amine hardener, its weight, with higher vigor and cross-linking reaction ability, shortens hardening time than preferably 12%-15%.
In the above-described embodiments, in order to reduce the preparation temperature of the formula, preparation time is shortened, fluorine is added into above-mentioned formula with the state of fluorin radical.And fluorin radical can be replaced with fluorosulfonic acid groups.
It is an advantage of the current invention that, first, using epoxy resin as raw material, increase various auxiliary agents and pigment and filler in it, curing agent, defoamer and many middle auxiliary agents are with the addition of, wherein auxiliary agent includes levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter, improves sub- light characteristic, weatherability, mobility of epoxide powder coating etc., and solidification temperature is reduced to 102 °C, hardening time foreshortens to 15min.
In addition, the present invention with the addition of various auxiliary agents in its formula, and temperature-pressure will have been carried out after these auxiliary agents and epoxy powder mixing and stirring, make its solidified forming, ensure that the various physics and mechanical performance of epoxy powder, increase weight polycaprolactone ratio in it for the polypropylene filler of 2-3% and the pigment of 3-5% again afterwards so that epoxide powder coating has more superior color characteristics and increased the performance of its impact resistance, Anti-scattering, finally improves its performance.
The following is using epoxy powder obtained in embodiments of the invention
Embodiment one
Using the component of following proportioning:Epoxy resin 65%, curing agent 15.4%, defoamer 3%, levelling agent 1.8%, anti-skinning agent 0.7%, delustering agent 5%, light stabilizer 3%, dispersant 2%, mould inhibitor 0.9%, fluorine 1.7% and adhesion promoter 0.5%.
Preparation time is 15min, and solidification temperature is 102 °C, and the epoxide powder coating for obtaining is applied on a pet film, is placed in more than 250 °C of environment temperature and is normally used, unchanged.
Embodiment two
Using the component of following proportioning:Epoxy resin 62%, curing agent 16%, defoamer 1.5%, levelling agent 1.8%, anti-skinning agent 1.6%, delustering agent 8%, light stabilizer 3%, dispersant 2%, mould inhibitor 0.9%, fluorine 1.8% and adhesion promoter 1%.
Preparation time is 14.9min, and solidification temperature is 101.98 °C, and the epoxide powder coating for obtaining is applied on a pet film, is placed in more than 250 °C of environment temperature and is normally used, unchanged.
Embodiment three
Using the component of following proportioning:Epoxy resin 63%, curing agent 15.5%, defoamer 1.5%, levelling agent 1.8%, anti-skinning agent 1.6%, delustering agent 8%, light stabilizer 2.5%, dispersant 2%, mould inhibitor 0.9%, fluorine 1.8% and adhesion promoter 1%.
Preparation time is 15.1min, and solidification temperature is 102.2 °C, and the epoxide powder coating for obtaining is applied on a pet film, is placed in more than 250 °C of environment temperature and is normally used, unchanged.
The present invention significantly reduces solidification temperature to 102 °C, hardening time foreshortens to 15min, energy when prepared by epoxide powder coating is saved, and improve preparation efficiency, and the epoxide powder coating for obtaining has preferable weatherability, environment Long-Time Service of the coating more than 250 °C is enabled, the performance of epoxide powder coating is improve.
What embodiments of the invention were announced is preferred embodiment, but is not limited thereto, one of ordinary skill in the art; easily according to above-described embodiment, the spirit of the present invention is understood, and make different amplifications and change; but as long as without departing from the present invention spirit, all within the scope of the present invention.
Claims (7)
1. the process of low-temperature setting heavy corrosion protection epoxy powder coating is prepared, is comprised the steps：
Epoxy resin is ground into by particulate powders using disintegrating apparatus, other auxiliary agents are subsequently adding, auxiliary agent includes curing agent, defoamer, levelling agent, anti-skinning agent, delustering agent, light stabilizer, dispersant, mould inhibitor, fluorine and adhesion promoter；
After above-mentioned epoxy powder and auxiliary agent mixing, it is stirred for uniformly using mixing plant；
The said mixture for stirring is placed in 100 degree to 103 degree of temperature-pressure equipment is carried out plus gentle pressing technology, and the process step time is no less than 20 minutes, and the semi-finished product for obtaining are sheet；
The sheet semi-finished product obtained in step C are crushed, crushing increases weight ratio for the polypropylene filler of 2-3% and the pigment of 3-5% in it after terminating；
The mixture obtained in whipping step D, and it is sieved using sieve；
The epoxide powder coating censorship that screening is obtained, and pack.
2. it is according to claim 1 prepare low-temperature setting heavy corrosion protection epoxy powder coating process, it is characterised in that：Epoxy resin in step A accounts for the 60%-65% of weight ratio.
3. a kind of formula for preparing low-temperature setting heavy corrosion protection epoxy powder coating according to claim 2, it is characterised in that：The epoxy resin is bisphenol A type epoxy resin, and the bisphenol A type epoxy resin is one or more in E-20, E-12, E-06.
4. it is according to claim 1 prepare low-temperature setting heavy corrosion protection epoxy powder coating process, it is characterised in that：Auxiliary formula in step A is：Curing agent 10%-16%, defoamer 1.5%-3%, levelling agent 0.9%-1.8%, anti-skinning agent 0.6%-1.9%, delustering agent 5%-8%, light stabilizer 1%-3%, dispersant 0.8%-2%, mould inhibitor 0.6%-0.9%, fluorine 0.1-1.8% and adhesion promoter 0.5 ~ 1.0%.
5. it is according to claim 4 prepare low-temperature setting heavy corrosion protection epoxy powder coating process, it is characterised in that：The curing agent is amine hardener, and its weight ratio is 12%-15%.
6. the process of the preparation low-temperature setting heavy corrosion protection epoxy powder coating according to claim 1 or 4, it is characterised in that：The fluorine is added into above-mentioned formula with the state of fluorin radical.
7. a kind of formula for preparing low-temperature setting heavy corrosion protection epoxy powder coating according to claim 6, it is characterised in that：The fluorin radical can be replaced with fluorosulfonic acid groups.
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| CN201510722453.XA CN106634399A (en) | 2015-10-31 | 2015-10-31 | Technological method of preparation of low-temperature curing heavy-duty epoxy powder coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112812662A (en) * | 2021-02-24 | 2021-05-18 | 东莞大宝化工制品有限公司 | LED (light-emitting diode) curing high-filling vacuum spraying primer and preparation method thereof |
| CN115403989A (en) * | 2022-10-17 | 2022-11-29 | 浙江绿环新材料科技有限公司 | Preparation process of epoxy resin-based low-temperature curing powder coating |
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| JP2000336286A (en) * | 1999-05-31 | 2000-12-05 | Kubota Corp | Low temperature curing type powder coating composition and method for fornming coating film on inner surface of metallic pipe using the same powder coating |
| CN101608091A (en) * | 2009-07-07 | 2009-12-23 | 宁波市派特勒粉末涂料有限公司 | Low-temperature setting heavy-duty anticorrosion powder coating |
| CN104130666A (en) * | 2014-07-29 | 2014-11-05 | 丹阳市海信涂料化工厂 | Formula for preparation of low-temperature curing heavy-duty anticorrosion epoxy powdery coating |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000336286A (en) * | 1999-05-31 | 2000-12-05 | Kubota Corp | Low temperature curing type powder coating composition and method for fornming coating film on inner surface of metallic pipe using the same powder coating |
| CN101608091A (en) * | 2009-07-07 | 2009-12-23 | 宁波市派特勒粉末涂料有限公司 | Low-temperature setting heavy-duty anticorrosion powder coating |
| CN104130666A (en) * | 2014-07-29 | 2014-11-05 | 丹阳市海信涂料化工厂 | Formula for preparation of low-temperature curing heavy-duty anticorrosion epoxy powdery coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112812662A (en) * | 2021-02-24 | 2021-05-18 | 东莞大宝化工制品有限公司 | LED (light-emitting diode) curing high-filling vacuum spraying primer and preparation method thereof |
| CN115403989A (en) * | 2022-10-17 | 2022-11-29 | 浙江绿环新材料科技有限公司 | Preparation process of epoxy resin-based low-temperature curing powder coating |
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Application publication date: 20170510 |