Application of tertiary amine catalyst LE-530 in improving weather resistance and chemical corrosion resistance of polyurethane coatings

Date：2025-03-12 Categories：Our Projects

Application of tertiary amine catalyst LE-530 in improving the weather resistance and chemical corrosion resistance of polyurethane coatings

1. Introduction

Polyurethane coatings are widely used in construction, automobile, ship, furniture and other fields due to their excellent physical properties and chemical stability. However, with the diversification of application environments, polyurethane coatings face increasing demands in terms of weather resistance and chemical corrosion resistance. As a highly efficient catalyst, the tertiary amine catalyst LE-530 can significantly improve the performance of polyurethane coatings, especially in terms of weather resistance and chemical corrosion resistance. This article will introduce in detail the characteristics, mechanism of action of the tertiary amine catalyst LE-530 and its application in polyurethane coating.

2. Overview of LE-530, tertiary amine catalyst

2.1 Product parameters

parameter name	parameter value
Chemical Name	Term amine catalyst LE-530
Molecular Weight	About 200 g/mol
Appearance	Colorless to light yellow liquid
Density	0.95-1.05 g/cm³
Boiling point	About 200°C
Flashpoint	About 100°C
Solution	Easy soluble in organic solvents
Storage Conditions	Cool, dry, ventilated
Shelf life	12 months

2.2 Chemical structure

The chemical structure of the tertiary amine catalyst LE-530 contains multiple tertiary amine groups, which play a key catalytic role in the polyurethane reaction. The structure is as follows:

R1-N-R2
   |
   R3

Among them, R1, R2, and R3 are different organic groups, and the specific structure can be adjusted according to actual application requirements.

3. Mechanism of action of tertiary amine catalyst LE-530

3.1 Catalyzed polyurethane reaction

Term amine catalyst LE-530 mainly plays the following role in polyurethane reaction:

Accelerate the reaction of isocyanate with polyol: Tertiary amine catalysts can significantly reduce the reaction activation energy, accelerate the reaction rate, and thus improve production efficiency.
Control the reaction rate: By adjusting the amount of catalyst, the rate of polyurethane reaction can be accurately controlled to avoid coating defects caused by excessive or slow reaction.
Improving coating performance: Tertiary amine catalysts can promote cross-linking reactions and improve the mechanical properties and chemical stability of the coating.

3.2 Improve weather resistance

Term amine catalyst LE-530 improves the weather resistance of polyurethane coatings through the following mechanisms:

Enhanced Crosslinking Density: Catalysts promote crosslinking reactions, form denser network structures, reduce micropores and defects inside the coating, thereby improving weather resistance.
Antioxidation effect: Tertiary amine groups have certain antioxidant ability and can delay the aging process of the coating under environmental factors such as ultraviolet rays and oxygen.
Improving water resistance: The tight crosslinked structure promoted by the catalyst can effectively prevent moisture penetration and improve the water resistance of the coating.

3.3 Improve chemical corrosion resistance

Term amine catalyst LE-530 improves chemical corrosion resistance of polyurethane coatings through the following mechanisms:

Enhanced Chemical Stability: The crosslinking reaction promoted by the catalyst forms a more stable chemical structure that can resist the erosion of chemicals such as acids, alkalis, and solvents.
Reduce coating defects: The tight crosslinked structure reduces micropores and defects inside the coating and reduces the possibility of chemical penetration.
Improving adhesion: The chemical reaction promoted by the catalyst can enhance the adhesion between the coating and the substrate and reduce coating peeling caused by chemical erosion.

4. Application of tertiary amine catalyst LE-530 in polyurethane coating

4.1 Building paint

In architectural coatings, the tertiary amine catalyst LE-530 can significantly improve the weather resistance and chemical corrosion resistance of the coating and extend the service life of the building. The specific application is as follows:

Exterior wall coating: By adding the tertiary amine catalyst LE-530, exterior wall coating can better resist UVThe erosion of environmental factors such as lines, rainwater, acid rain and other environmental factors will maintain long-term beauty and protective effect.
Floor Coating: Floor coatings need to have excellent chemical corrosion resistance. The tertiary amine catalyst LE-530 can significantly improve the acid, alkali and solvent resistance of the coating, and are suitable for industrial floors, garage floors and other occasions.

4.2 Automotive Paint

In automotive coatings, the tertiary amine catalyst LE-530 can improve the weather resistance and chemical corrosion resistance of the coating and extend the service life of the automobile. The specific application is as follows:

Body Paint: By adding the tertiary amine catalyst LE-530, the body paint can better resist the erosion of environmental factors such as ultraviolet rays, acid rain, salt spray, etc., and maintain a long-term gloss and protective effect.
Chassis coating: Chassis coating requires excellent chemical corrosion resistance. The tertiary amine catalyst LE-530 can significantly improve the acid, alkali and solvent resistance of the coating, and is suitable for automotive chassis, engine compartment and other occasions.

4.3 Marine coating

In marine coatings, the tertiary amine catalyst LE-530 can improve the weather resistance of the coating and chemical corrosion resistance, and extend the service life of the ship. The specific application is as follows:

Hull Paint: By adding the tertiary amine catalyst LE-530, the hull paint can better resist the erosion of environmental factors such as seawater, ultraviolet rays, salt spray, etc., and maintain a long-term protective effect.
Deck coating: Deck coatings need to have excellent chemical corrosion resistance. The tertiary amine catalyst LE-530 can significantly improve the acid, alkali and solvent resistance of the coating, and are suitable for ship decks, cabins and other occasions.

4.4 Furniture Paints

In furniture coatings, the tertiary amine catalyst LE-530 can improve the weather resistance of the coating and chemical corrosion resistance, and extend the service life of the furniture. The specific application is as follows:

Wood Coating: By adding the tertiary amine catalyst LE-530, wood paint can better resist the erosion of environmental factors such as ultraviolet rays, moisture, chemicals, etc., and maintain long-term beauty and protective effect.
Metal coatings: Metal coatings need to have excellent chemical corrosion resistance. The tertiary amine catalyst LE-530 can significantly improve the acid, alkali and solvent resistance of the coating, and are suitable for furniture metal parts, hardware accessories and other occasions.

5. Usage of tertiary amine catalyst LE-530Method

5.1 Addition amount

The amount of tertiary amine catalyst LE-530 should be adjusted according to the specific application requirements. It is generally recommended that the amount of addition is 0.1%-1.0% of the total amount of polyurethane coating. For specific additions, please refer to the following table:

Application Fields	Suggested addition amount (%)
Building Paints	0.2-0.5
Auto paint	0.3-0.7
Ship Coating	0.4-0.8
Furniture Paints	0.1-0.4

5.2 How to use

Premix: Premix the tertiary amine catalyst LE-530 and the polyol components in advance to ensure that the catalyst is fully dispersed.
Reaction Control: Adjust the amount of catalyst added according to the reaction rate requirements, control the reaction rate, and avoid excessive or slow reaction.
Post-treatment: After the reaction is completed, perform appropriate post-treatment, such as curing, drying, etc. to ensure that the coating performance is excellent.

6. Advantages of tertiary amine catalyst LE-530

6.1 High-efficiency Catalysis

The tertiary amine catalyst LE-530 has an efficient catalytic effect, which can significantly increase the reaction rate of polyurethane, shorten the production cycle, and improve production efficiency.

6.2 Excellent performance

The tertiary amine catalyst LE-530 can significantly improve the weather resistance and chemical corrosion resistance of polyurethane coatings, extend the service life of the coating, and reduce maintenance costs.

6.3 Environmental protection and safety

Term amine catalyst LE-530 has the characteristics of low toxicity and low volatility, meets environmental protection requirements, and is safe and reliable in use.

6.4 Affordable

The tertiary amine catalyst LE-530 has a small amount of added amount, which has significant effect, which can reduce production costs and improve economic benefits.

7. Conclusion

Term amine catalyst LE-530 is an efficient catalyst that performs excellently in improving the weather resistance and chemical corrosion resistance of polyurethane coatings. By introducing its product parameters, mechanism of action, application field and usage method in detail, this paper demonstrates the tertiary amine catalyst LE-530’s wide application prospects in polyurethane coatings. In the future, with the continuous advancement of technology, the tertiary amine catalyst LE-530 will give full play to its unique advantages in more fields to provide strong support for the development of polyurethane coatings.

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