What is the role of adding MOCA to polyurethane prepolymer?
1. What is MOCA
MOCA is a commonly used additive with a chemical structure of isocyanate and isocyanate derivatives, which has good reactivity and volatility. MOCA can react chemically with a variety of synthetic resins to form a 3D three-dimensional network structure, improving the strength, hardness and wear resistance of the material.
2. What is the role of adding MOCA to polyurethane prepolymer?
As an important resin material, polyurethane prepolymer is widely used in the preparation of various polymer materials and products. However, polyurethane prepolymer itself has high viscosity and poor fluidity, which is not conducive to processing and molding. Therefore, certain additives need to be added to improve its processability and stability.
As a commonly used additive, MOCA can play the following roles:
1. Improve viscosity and fluidity: MOCA can react with polyurethane prepolymer to produce CO2 gas, which makes the material have better fluidity, reduces its viscosity, and is conducive to processing and molding.
2. Adjusting hardness and elastic modulus: MOCA's reaction can form a 3D network structure, increase the cross-linking density of the material, improve its hardness and elastic modulus, and is suitable for preparing various polyurethane products with high hardness and strength requirements.
3. Improving wear resistance: MOCA's reaction can form a wear-resistant surface layer, improving the wear resistance and service life of polyurethane products.
What are the application fields of adding MOCA to polyurethane prepolymer?
Adding MOCA to polyurethane prepolymer is an effective method to improve processing performance and product performance, and has been widely used in various fields.
1. Vehicle coating: Polyurethane coating is an important coating material, which is widely used in the coating of various vehicles such as automobiles, motorcycles, and airplanes. Adding MOCA can improve the hardness and wear resistance of polyurethane coatings, and enhance its weather resistance and chemical properties.
2. Printing ink: Polyurethane ink has excellent adhesion, weather resistance and chemical properties, and is an important printing material. Adding MOCA can improve the fluidity and stability of polyurethane ink, and improve its printing effect and quality.
Sole material: Polyurethane is an important sole material with good elasticity, wear resistance and oil resistance. Adding MOCA can adjust the hardness and elastic modulus of polyurethane, increase its tensile strength and wear resistance, and is suitable for the preparation of various sole materials.