The important role of DMDEE dimorpholine diethyl ether in environmentally friendly coating formulations: rapid drying and excellent adhesion

Introduction

With the increasing awareness of environmental protection and the increasingly strict environmental protection regulations, 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 properties such as rapid drying, good adhesion, weather resistance, etc. DMDEE (dimorpholine diethyl ether) plays an important role in environmentally friendly coating formulations as an efficient catalyst. This article will discuss in detail the role of DMDEE in environmentally friendly coatings, especially its performance in rapid drying and excellent adhesion.

1. Basic characteristics of DMDEE

1.1 Chemical structure

The chemical name of DMDEE is dimorpholine diethyl ether, and its chemical structure is as follows:

 O
  /
 /
N N
    /
   /
   O

DMDEE is a colorless to light yellow liquid with low viscosity and good solubility, compatible with a variety of resins and solvents.

1.2 Physical and chemical properties

Properties	value
Molecular Weight	244.3 g/mol
Density	1.02 g/cm³
Boiling point	250°C
Flashpoint	110°C
Solution	Easy soluble in water, alcohols, and ethers

1.3 Environmental protection characteristics

DMDEE, as an environmentally friendly catalyst, has the characteristics of low toxicity and low VOC emissions, and meets the requirements of modern environmentally friendly coatings.

2. The role of DMDEE in environmentally friendly coatings

2.1 Rapid drying

One of the main functions of DMDEE in environmentally friendly coatings is to accelerate the drying process of the coating. Through catalytic reactions, DMDEE can significantly shorten the surface drying and hard work time of the paint and improve production efficiency.

2.1.1 Catalytic mechanism

DMDEE catalyzed isocyanic acid in polyurethane reactionThe reaction of the ester and hydroxyl group accelerates the curing process of the coating. The catalytic mechanism is as follows:

1. Reaction of isocyanate and hydroxyl group: DMDEE catalyzes the reaction of isocyanate (-NCO) and hydroxyl group (-OH) to form carbamate (-NHCOO-).
2. Channel Growth Reaction: DMDEE further catalyzes the reaction of carbamate and isocyanate to form high molecular weight polyurethane chains.

2.1.2 Comparison of drying time

Coating Type	Drying time (no DMDEE)	Drying time (including DMDEE)
Water-based polyurethane coating	4 hours	2 hours
Solvent-based polyurethane coating	6 hours	3 hours

2.2 Excellent adhesion

DMDEE can not only accelerate the drying of the paint, but also significantly improve the adhesion of the paint. By optimizing the crosslinking structure of the coating, DMDEE makes the bond between the coating and the substrate stronger.

2.2.1 Adhesion test

Coating Type	Adhesion (no DMDEE)	Adhesion (including DMDEE)
Water-based polyurethane coating	Level 2	Level 1
Solvent-based polyurethane coating	Level 3	Level 1

Note: Adhesion level 1 is better, and level 5 is worse.

2.2.2 Adhesion lifting mechanism

DMDEE improves the adhesion of the coating through the following mechanisms:

1. Increase of cross-linking density: DMDEE catalytic reaction generates more cross-linking points, improves the cross-linking density of the coating, and enhances the mechanical strength of the coating.
2. Interface Bonding Enhancement: DMDEE optimizes the interface bond between the coating and the substrate, reduces interface defects and improves adhesion.

3. Application of DMDEE in environmentally friendly coating formulations

3.1 Water-based polyurethane coating

Water-based polyurethane coating is an environmentally friendly coating with low VOC emissions and good performance. The application of DMDEE in water-based polyurethane coatings can significantly improve the drying speed and adhesion of the coating.

3.1.1 Recipe Example

Ingredients	Mass score (%)
Water-based polyurethane resin	60
Water	30
DMDEE	1
Other additives	9

3.1.2 Performance comparison

Performance	No DMDEE	Includes DMDEE
Drying time	4 hours	2 hours
Adhesion	Level 2	Level 1
Water resistance	Good	Excellent

3.2 Solvent-based polyurethane coating

Solvent-based polyurethane coatings have high VOC emissions, but still have irreplaceable advantages in some special applications. The application of DMDEE in solvent-based polyurethane coatings can significantly improve the drying speed and adhesion of the coating.

3.2.1 Recipe Example

Ingredients	Mass score (%)
Solvent-based polyurethane resin	50
Solvent	40
DMDEE	1
Other additives	9

3.2.2 Performance comparison

Performance	No DMDEE	Includes DMDEE
Drying time	6 hours	3 hours
Adhesion	Level 3	Level 1
Weather resistance	Good	Excellent

4. Environmental advantages of DMDEE

4.1 Low VOC emissions

DMDEE, as an environmentally friendly catalyst, has the characteristics of low VOC emissions and meets the requirements of modern environmentally friendly coatings. By using DMDEE, VOC emissions during coating production are significantly reduced.

4.2 Low toxicity

DMDEE has low toxicity and has less impact on the human body and the environment. During coating production and use, the use of DMDEE can reduce the harm to workers and the environment.

4.3 Sustainability

The production and use process of DMDEE is in line with the concept of sustainable development. By using DMDEE, paint manufacturers can reduce negative impacts on the environment and improve the environmental performance of their products.

5. DMDEE's market prospects

5.1 Market demand

With the increasing strictness of environmental protection regulations and the increasing awareness of consumers' environmental protection, the market demand for environmentally friendly coatings continues to grow. As an efficient and environmentally friendly catalyst, DMDEE has broad application prospects in environmentally friendly coatings.

5.2 Technology development trends

In the future, the technological development trend of DMDEE will mainly focus on the following aspects:

1. High-efficiency Catalysis: further improve the catalytic efficiency of DMDEE and shorten the drying time of the paint.
2. Multifunctionalization: Develop DMDEE derivatives with multiple functions, such as DMDEE with both catalytic and plasticizing functions.
3. Green Production: Optimize the production process of DMDEE to reduce energy consumption and pollution in the production process.

5.3 Market Challenges

Although DMDEE has in environmentally friendly coatingsSignificant advantages, but its marketing still faces some challenges:

1. Cost Issues: DMDEE has a high production cost, which may affect its competitiveness in the market.
2. Technical barriers: The application technology of DMDEE is relatively complex, and coating manufacturers require high technical level.
3. Market Competition: There are many environmentally friendly catalysts on the market, and DMDEE needs to compete with other catalysts for market share.

6. Conclusion

DMDEE bimorpholine diethyl ether plays an important role in environmentally friendly coating formulations, especially in rapid drying and excellent adhesion. By catalyzing the polyurethane reaction, DMDEE can significantly shorten the drying time of the coating and improve production efficiency. At the same time, DMDEE significantly improves the adhesion of the coating and enhances the mechanical strength and durability of the coating by optimizing the crosslinking structure of the coating. In addition, DMDEE has environmental advantages such as low VOC emissions, low toxicity and sustainability, and meets the requirements of modern environmentally friendly coatings. Although DMDEE still faces some challenges in the market, its application prospects in environmentally friendly coatings are broad and is expected to become an important catalyst in the field of environmentally friendly coatings in the future.

References

1. Zhang San, Li Si. Current development status and trends of environmentally friendly coatings[J]. Coating Technology, 2020, 45(3): 12-18.
2. Wang Wu, Zhao Liu. Research on the application of DMDEE in polyurethane coatings[J]. Coating Industry, 2019, 49(5): 23-28.
3. Chen Qi, Zhou Ba. Development and Application of Environmentally Friendly Catalysts[J]. Chemical Engineering, 2021, 50(2): 45-50.

(Note: This article is fictional content and is for reference only.)

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