CN104356363B - A kind of modified imidazole class latency Epoxy curing accelerators - Google Patents
A kind of modified imidazole class latency Epoxy curing accelerators Download PDFInfo
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- CN104356363B CN104356363B CN201410628015.2A CN201410628015A CN104356363B CN 104356363 B CN104356363 B CN 104356363B CN 201410628015 A CN201410628015 A CN 201410628015A CN 104356363 B CN104356363 B CN 104356363B
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- imidazoles
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- curing accelerators
- epoxy curing
- curing accelerator
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Abstract
The present invention relates to a kind of modified imidazole class latency Epoxy curing accelerators, its composition component and parts by weight thereof are as follows: imidazoles curing accelerator 80 95 parts；Zinc oxide 5 20 parts；Wherein imidazoles curing accelerator includes imidazoles, 2 Methylimidazole .s, 2 propyl imidazoles, 2 isopropylimdazoles, 2 ethyl 4 Methylimidazole .s, 2 phenylimidazoles, 2 undecyl imidazoles, 2 heptadecyl imidazole etc..The synthetic method of modified imidazole class latency Epoxy curing accelerators of the present invention is simple, easily industrialization, use solid state reaction, it is not necessary to solvent, very utilization rate, stop pollution environmental phenomenon, and, the use of this curing accelerator, the Yellowing of powdery paints can be effectively improved, decrease the use of anti-yellowing additives, cost-effective；Meanwhile, the use of this curing accelerator can extend the period of storage of powdery paints, extends the useful life of powdery paints.
Description
Technical field
The invention belongs to powder coating technology field, relate to a kind of imidazoles epoxy resin curing accelerator, especially a kind of modified
Imidazoles latency Epoxy curing accelerators.
Background technology
Epoxide powder coating, as a big class of powdery paints, is currently mainly applied to Functional anticorrosive paint, with common powder
Coating is different, and it lays particular emphasis on the defencive function to ground, because tying containing substantial amounts of phenyl ring, hydroxyl in the molecular structure of epoxy resin
Structure, ehter bond, have preferable wettability and adhesion, heat-resisting, resistance to chemical attack, formed polar substrates particularly metal base
Coating there is the mechanical strength of excellence, such as hardness, cold-hot impact and the performance such as mechanical shock, so epoxide powder coating can
With use that can be permanently effective under harsh corrosive environment.General corrosion-proof epoxy powder coating needs low-temperature fast-curing, institute
Essential with curing accelerator, and now the most general be imidazoles curing accelerator, but due to imidazoles curing accelerator
Activity is higher, and after mixing with epoxy resin, working life is shorter, and the powdery paints made can not be stored the long period, and coating is held
Easily turn yellow.So for overcoming these shortcoming and defect, simple glyoxaline compound being modified the imdazole derivatives of synthesizing new
Being the effective way solving the problems referred to above, the development to epoxide powder coating is significant.
At present, concrete grammar be utilize on imidazolium compounds imidazole ring 1 nitrogen-atoms and the reactivity of 3 nitrogen-atoms and other
Compound reacts, and to the active site (secondary amine, tertiary amine groups) on imidazole molecule by forming sterically hindered closing, thus drops
Its reactivity low, and improve the compatibility of itself and epoxy resin, give the performance that its epoxy resin cured product is special simultaneously.Logical
Cross retrieval, find that overwhelming majority imdazole derivatives is by forming addition with epoxy resin (epoxide), isocyanates, urea
Thing, becomes salt with organic acid, forms the mode such as complex and micro-Rubber Capsule with slaine, makes imidazoles On The Latent Accelerator.
But these methods all can dramatically increase production cost, reduce profit.Nitrogen-atoms in glyoxaline compound can be by providing electricity
Son is coordinated with metal, applicant has invented modified imidazole class latency curable epoxide based on coordination based on this and promotes
Agent, it not only can extend period of storage, it is also possible to effective improvement Yellowing.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of can solidify with the imidazoles of slow release curing activity
Accelerator, the Yellowing that simultaneously can improve imidazoles curing accelerator, the modified imidazole class that can extend period of storage are hidden
Property Epoxy curing accelerators.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of modified imidazole class latency Epoxy curing accelerators, it is characterised in that: its composition component and parts by weight thereof are as follows:
Imidazoles curing accelerator 80-95 part；
Zinc oxide 5-20 part；
The preparation method of above-mentioned modified imidazole class latency Epoxy curing accelerators, step is as follows:
Take imidazoles curing accelerator and zinc oxide, be fully ground, after mix homogeneously, react 6～8 hours at 150～160 DEG C,
Obtain modified imidazole class latency Epoxy curing accelerators.
And, described imidazoles curing accelerator is imidazoles, 2-methylimidazole, 2-propyl imidazole, 2 isopropyl imidazole, 2-ethyl
-4-methylimidazole, 2-phenylimidazole, 2-undecyl imidazole or 2-heptadecyl imidazole.
And, described zinc oxide is as unique modifying agent.
Advantages of the present invention and good effect be:
1, the modified imidazole class latency Epoxy curing accelerators of the present invention can extend the storage time of powdery paints, expands powder
The use temporal time limit of end coating；This curing accelerator is after being applied in coating, performance same ensureing its coating
Time have more preferable temperature tolerance and storage characteristics, actual production is made great sense.
2, the modified imidazole class latency Epoxy curing accelerators of the present invention in use, reduces Yellowing, reduces
The consumption of anti-yellowing additives.
3, the synthetic method of this accelerator is simple, and without solvent, no coupling product generates, and very utilization rate has stopped pollution ring
The generation of border phenomenon, it is easier to industrialized production, economic and environment-friendly.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described；Following embodiment is illustrative, is not determinate, it is impossible to
Protection scope of the present invention is limited with following embodiment.
Reagent used in the present invention, if no special requirements, is common agents in this area；Side used in the present invention
Method, if no special requirements, method conventional in being this area.
The principle of the present invention is as follows: the nitrogen-atoms in glyoxaline compound can be coordinated with metal by providing electronics, based on
This applicant has invented modified imidazole class latency Epoxy curing accelerators based on coordination, and it not only can extend storage
Time, it is also possible to effective improvement Yellowing.
Embodiment 1
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-methylimidazole 80～95 parts；
Zinc oxide 5～20 parts；
The step of the preparation method of above-mentioned firming agent is as follows:
Above-mentioned each material is weighed up by weight, then mix homogeneously, react 6～8 hours at 150～160 DEG C, the most available
New modified curing accelerator.
Embodiment 2
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-propyl imidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Embodiment 3
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2 isopropyl imidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Embodiment 4
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-ethyl-4-methylimidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Embodiment 5
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-phenylimidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Embodiment 6
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-undecyl imidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Embodiment 7
A kind of modified imidazole class latency Epoxy curing accelerators, its raw material constitutes component and parts by weight are respectively as follows:
2-heptadecyl imidazole 80～95 parts；
Zinc oxide 5～20 parts；
Wherein, preparation method is with embodiment 1.
Modified imidazole class latency Epoxy curing accelerators of the present invention is applied to the detection of powdery paints:
For checking the practical application effect of curing accelerator of the present invention, concrete operations are as follows: by embodiment 1 according to 2-methylimidazole
90 parts, the prepared curing accelerator A of zinc oxide 10 parts and common 2-methylimidazole are coated with by a certain amount of epoxy powder that joins respectively
In the formula of material, contrast that the projects such as the outward appearance of coating, storge quality, solidification temperature, gel time are tested, it is correlated with
Testing result is shown in Table 1.
Table 1 testing result table
By in the testing result of table 1 it can be seen that the modified imidazole class latency Epoxy curing accelerators of synthesis and conventional 2-
Methylimidazole. is compared, and has more preferable temperature tolerance and storage characteristics, have actual production the biggest while ensureing the performance of its coating
Meaning.
Claims (2)
1. a modified imidazole class latency Epoxy curing accelerators, it is characterised in that: its composition component and parts by weight thereof are as follows:
Imidazoles curing accelerator 80-95 part；
Zinc oxide 5-20 part；
The preparation method of above-mentioned modified imidazole class latency Epoxy curing accelerators, step is as follows:
Take imidazoles curing accelerator and zinc oxide, be fully ground, after mix homogeneously, react 6～8 hours at 150～160 DEG C,
Obtain modified imidazole class latency Epoxy curing accelerators；
Described imidazoles curing accelerator is imidazoles, 2-methylimidazole, 2-propyl imidazole, 2 isopropyl imidazole, 2-ethyl-4-methyl
Imidazoles, 2-phenylimidazole, 2-undecyl imidazole or 2-heptadecyl imidazole.
Modified imidazole class latency Epoxy curing accelerators the most according to claim 1, it is characterised in that: described zinc oxide
As unique modifying agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410628015.2A CN104356363B (en) | 2014-11-10 | 2014-11-10 | A kind of modified imidazole class latency Epoxy curing accelerators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410628015.2A CN104356363B (en) | 2014-11-10 | 2014-11-10 | A kind of modified imidazole class latency Epoxy curing accelerators |
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| CN104356363A CN104356363A (en) | 2015-02-18 |
| CN104356363B true CN104356363B (en) | 2016-12-07 |
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| CN113621264A (en) * | 2021-06-23 | 2021-11-09 | 天津西敦粉漆科技有限公司 | Method for preparing low-temperature curing powder coating in post-mixing mode, related composite nano low-temperature curing catalyst and preparation method thereof |
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| CN103880752B (en) * | 2012-12-21 | 2016-06-01 | 中国科学院大连化学物理研究所 | The preparation of nitrogen heterocyclic metal-salt or its heterogeneous ring compound title complex |
| CN103059517A (en) * | 2012-12-31 | 2013-04-24 | 金安国纪科技股份有限公司 | Environmentally-friendly copper-clad plate glue solution, copper-clad plate and preparation method thereof |
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Granted publication date: 20161207 Termination date: 20211110 |