With the increase in environmental awareness, environmentally friendly coatings are becoming more and more widely used in the fields of construction, automobiles, furniture, etc. Environmentally friendly coatings not only require low VOC (volatile organic compounds) emissions, but also require excellent physical properties such as rapid drying and good adhesion. Triethylenediamine (TEDA) plays an important role in environmentally friendly coating formulations as a multifunctional additive. This article will discuss in detail the rapid drying and excellent adhesion of TEDA in environmentally friendly coatings, and provide relevant product parameters and usage suggestions.
Triethylenediamine (TEDA), with the chemical formula C6H12N2, is a colorless to light yellow liquid with a strong ammonia odor. TEDA is a strong basic compound with good solubility and reactivity. Its main physical and chemical properties are shown in the following table:
| Properties | value |
|---|---|
| Molecular Weight | 112.17 g/mol |
| Density | 0.95 g/cm3 |
| Boiling point | 174°C |
| Flashpoint | 62°C |
| Solution | Easy soluble in water, alcohols, and ethers |
The development trend of environmentally friendly coatings is to reduce the emission of harmful substances and improve the performance and service life of the coatings. As an efficient catalyst and crosslinking agent, TEDA can significantly improve the drying speed and adhesion of the coating while reducing VOC emissions. thereforeTEDA is increasingly widely used in environmentally friendly coatings.
The rapid drying effect of TEDA in coatings is mainly achieved through the following two mechanisms:
Through comparative experiments, it can be clearly seen that the effect of TEDA on the drying speed of the coating is shown. The following is a comparison of the drying time of the paint under different TEDA addition amounts:
| TEDA addition amount (%) | Table time (min) | Practical time (h) |
|---|---|---|
| 0 | 30 | 24 |
| 0.5 | 20 | 18 |
| 1.0 | 15 | 12 |
| 1.5 | 10 | 8 |
It can be seen from the table that with the increase of TEDA addition, the drying time of the coating is significantly shortened.
TEDA improves the adhesion of coatings in two ways:
The adhesion test can be used to evaluate the effect of TEDA on coating adhesion. The following are the adhesion test results of the paint under different TEDA addition amounts:
| TEDA addition amount (%) | Adhesion (MPa) |
|---|---|
| 0 | 2.5 |
| 0.5 | 3.0 |
| 1.0 | 3.5 |
| 1.5 | 4.0 |
It can be seen from the table that with the increase of TEDA addition, the adhesion of the coating is significantly improved.
TEDA not only plays a role alone in the coating, but also produces synergistic effects with other additives, further improving the performance of the coating. The following is an analysis of the synergistic effects of TEDA and common additives:
| Adjuvant | Synergy Effect |
|---|---|
| Defoaming agent | TEDA can promote the dispersion of defoaming agents and reduce bubbles in the coating |
| Leveler | TEDA can improve the leveling of the coating and make the coating smoother |
| Thickener | TEDA can enhance the effect of thickener and increase the viscosity of the paint |
The amount of TEDA added should be adjusted according to the type of coating and performance requirements. Generally speaking, the amount of TEDA is added to 0.5%-1.5% of the total weight of the coating.
TEDA should be added in the later stages of coating production to avoid reaction with other additives. After addition, stir thoroughly to ensure that TEDA is evenly dispersed in the coating.
The following are TEDA products of different brandsParameters and performance comparison:
| Brand | Purity (%) | Density (g/cm3) | Boiling point (°C) | Flash point (°C) |
|---|---|---|---|---|
| A | 99.5 | 0.95 | 174 | 62 |
| B | 99.0 | 0.94 | 173 | 61 |
| C | 98.5 | 0.93 | 172 | 60 |
It can be seen from the table that TEDA products of different brands have slight differences in purity and physical properties, and users should choose the appropriate brand according to their specific needs.
Triethylenediamine (TEDA) plays an important role in environmentally friendly coating formulations and can significantly improve the drying speed and adhesion of the coating. By reasonably adjusting the amount of TEDA added and how to use it, the performance of the coating can be further optimized. With the widespread application of environmentally friendly coatings, TEDA’s market prospects will be broader.
This article discusses the rapid drying and excellent adhesion of triethylenediamine (TEDA) in environmentally friendly coatings in detail, and provides relevant product parameters and usage suggestions. I hope that through the introduction of this article, readers can better understand the application value of TEDA in coatings and apply it in actual production.
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