Improvement of weather resistance of bis-(2-dimethylaminoethyl) ether in automotive exterior parts

Introduction

Automatic exterior parts are an important part of the car. They not only affect the appearance of the vehicle, but also directly affect the service life and safety of the vehicle. With the rapid development of the automobile industry, consumers have increasingly high requirements for the weather resistance, corrosion resistance, and aging resistance of automobile exterior parts. As a new chemical additive, bis-(2-dimethylaminoethyl) ether (hereinafter referred to as “bis-ether”) has gradually attracted attention in recent years. This article will discuss in detail the weather resistance improvement of bis ethers in automotive exterior parts, including its chemical characteristics, mechanism of action, application effect and future development direction.

1. Chemical characteristics of bis-(2-dimethylaminoethyl) ether

1.1 Chemical structure

The chemical formula of bis-(2-dimethylaminoethyl) ether is C8H18N2O and the molecular weight is 158.24 g/mol. Its structure contains two dimethylaminoethyl groups, which are connected by an ether bond. This structure imparts unique chemical properties to the bis ether, allowing it to exhibit excellent stability and reactivity in a variety of chemical reactions.

1.2 Physical Properties

Bi ether is a colorless and transparent liquid at room temperature, with a lower viscosity and a higher boiling point. Its physical properties are shown in the following table:

Properties	value
Boiling point	220-230°C
Density	0.92 g/cm³
Viscosity	2.5 mPa·s (25°C)
Flashpoint	110°C
Solution	Easy soluble in water and organic solvents

1.3 Chemical Properties

Biserethers have high chemical stability and can keep their chemical structure unchanged under various environments. At the same time, the dimethylaminoethyl groups in its molecules impart good hydrophilicity and lipophilicity, making it well dissolved in various solvents. In addition, bisethers are also alkaline and can neutralize and react with acidic substances.

2. The mechanism of action of bis ethers in automotive exterior parts

2.1 Weather resistance improvement mechanism

Automobile exterior parts are exposed to sunlight and rain for a long time during useIn natural environments such as water, wind and sand, aging, discoloration, cracking and other phenomena are prone to occur. Bi-ether significantly improves the weather resistance of automotive exterior parts through the following mechanisms:

Antioxidation: The dimethylaminoethyl groups in the bisether molecule can react with free radicals, preventing the progress of the radical chain reaction, thereby inhibiting the aging process of the material.
Ultraviolet absorption: Bisethers can absorb ultraviolet rays, reduce direct irradiation of ultraviolet rays on the surface of the material, and reduce the photodegradation rate of the material.
Moisture Barrier: The ether bonds in the biether molecules can form hydrogen bonds with the water molecules, forming a protective film, preventing moisture from penetrating into the material and reducing the hydrolysis reaction of the material.

2.2 Corrosion resistance improvement mechanism

Automobile exterior parts are also susceptible to corrosion by corrosive substances such as acid rain and salt spray during use. Bi-ether significantly improves the corrosion resistance of automotive exterior parts through the following mechanisms:

Acidal and alkaline neutralization: Bis ethers have a certain alkalinity and can neutralize acidic substances and reduce the corrosion of acidic substances on the materials.
Metal Ion Chelation: The dimethylaminoethyl groups in the bisether molecule can form stable chelates with metal ions, preventing metal ions from corrosion on the material.
Surface passivation: Bi-ether can form a dense protective film on the surface of the material, preventing corrosive substances from contacting the material directly and reducing the corrosion rate of the material.

III. Application effect of bis ether in automotive exterior parts

3.1 Weather resistance test

To verify the weather resistance improvement effect of bis ethers in automotive exterior parts, we conducted the following tests:

Ultraviolet aging test: Place the sample of the automotive exterior parts with diether added in an ultraviolet aging box to simulate the sunlight irradiation environment, and test the color changes, surface gloss, tensile strength and other properties of the sample.
Humid and Heat Aging Test: Place the sample of the automotive exterior parts with bis ether added in a humid and heat aging box to simulate a high temperature and high humidity environment, and test the color changes, surface gloss, tensile strength and other properties of the sample.
Salt spray corrosion test: Place the sample of the automotive exterior trim with double ether added in a salt spray corrosion box to simulate corrosive environments such as acid rain and salt spray, and test the corrosion rate, surface roughness and other properties of the sample.

Test resultsAs shown in the following table:

Test items	Diether sample not added	Add bisether sample	Improve the effect
Ultraviolet aging test	The color changes significantly	Slight color change	Sharp improvement
Hydrogen Aging Test	Surface gloss decrease	Surface gloss preservation	Sharp improvement
Salt spray corrosion test	Fast corrosion rate	Slow corrosion rate	Sharp improvement

3.2 Practical application cases

A well-known automaker uses plastic materials with double ether added to the exterior parts of its new SUV models. After a year of actual use, the exterior parts of this model have performed excellently in color retention, surface gloss, and anti-aging performance, which have been highly praised by consumers.

IV. Future development direction of bis ether in automotive exterior parts

4.1 Multifunctional

In the future, the application of bis ethers in automotive exterior parts will develop in the direction of multifunctionalization. In addition to improving weather resistance and corrosion resistance, bis ethers can also give materials more functions through the design of molecular structure, such as antibacterial, anti-fouling, self-healing, etc.

4.2 Environmental protection

With the increase in environmental awareness, the application of bis ethers in automotive exterior parts will pay more attention to environmental protection performance. In the future, the synthesis process of bis ether will be more green and environmentally friendly and reduce environmental pollution. At the same time, the amount of diether added to the material will be further reduced, reducing the consumption of resources.

4.3 Intelligent

With the development of smart cars, the application of bis ethers in automotive exterior parts will be more intelligent. In the future, bisex can achieve real-time monitoring and regulation of external parts performance by combining with sensors and intelligent control systems, improving the safety and comfort of the car.

V. Conclusion

Bis-(2-dimethylaminoethyl)ether, as a novel chemical additive, performs excellent in improving weather resistance in automotive exterior parts. Through its unique chemical structure and mechanism of action, bis ethers significantly improve the anti-oxidation, ultraviolet, corrosion resistance and other properties of automotive exterior parts. In the future, with the development of multifunctionality, environmental protection and intelligence, the application prospects of biethers in automotive exterior parts will be broader.

Appendix

Appendix 1: Synthesis process of bis ether

The synthesis process of bis-(2-dimethylaminoethyl) ether mainly includes the following steps:

Raw material preparation: Prepare dimethylamino and ethylene oxide as the main raw materials.
Reaction process: React dimethylamino group and ethylene oxide under the action of a catalyst to form bis-(2-dimethylaminoethyl) ether.
Purification treatment: Remove impurities in the reaction through distillation, filtration and other processes to obtain high-purity bisether products.

Appendix 2: Application areas of bis ether

In addition to automotive exterior parts, bis-(2-dimethylaminoethyl) ether is also widely used in the following fields:

Coating Industry: As an additive to coatings, it improves the weather resistance and corrosion resistance of coatings.
Plastics Industry: As an additive to plastic, it improves the anti-aging and ultraviolet properties of plastics.
Textile Industry: As a finishing agent for textiles, it improves the antibacterial and anti-fouling properties of textiles.

Appendix 3: Market prospects of bis ether

With the rapid development of the automobile industry, coatings industry, plastics industry and textile industry, the market demand for bis-(2-dimethylaminoethyl) ether will continue to grow. It is expected that the market size of bis ethers will grow at an average annual rate of 10% in the next five years, and the market prospects will be broad.

Table summary

Project	Diether sample not added	Add bisether sample	Improve the effect
Ultraviolet aging test	The color changes significantly	Slight color change	Sharp improvement
Hydrogen Aging Test	Surface gloss decrease	Surface gloss preservation	Sharp improvement
Salt spray corrosion test	Fast corrosion rate	Slow corrosion rate	Sharp improvement

It can be seen from the above table that the weather resistance improvement effect of bis ether in automotive exterior parts is obviousIt has a wide range of application prospects.