VAE emulsion is an important raw material for the production of chemicals, widely used in coatings, adhesives, fabric treatment, paper coating and other fields. The following is the manufacturing method of VAE emulsion:
I. Raw material preparation
1. Ethylene: obtained by steam cracking method with naphtha or natural gas as raw material.
2. Vinyl acetate: ethylene and acetic acid as raw materials, obtained by vinyl acetate synthesis method.
3. initiator: organic peroxides such as benzoyl peroxide are commonly used as initiators.
4. emulsifier: commonly used non-ionic surfactants as emulsifiers, such as polyoxyethylene alkyl phenol ether.
II. Emulsion polymerization
1. Mix ethylene and vinyl acetate in a certain proportion and pass into the reactor.
2. Add initiator and emulsifier, and carry out emulsion polymerization reaction under appropriate temperature and pressure.
3. Control the reaction speed and temperature so that the monomer is completely transformed to produce VAE emulsion.
3. Post-treatment
1. Degas the generated VAE emulsion to remove unreacted monomers and low molecular volatiles in it.
2. Adjust the pH value of the emulsion to make it more stable.
3. Perform filtration treatment to remove impurities and solid particles in the emulsion.
4. Packing and storage
Pack the treated VAE emulsion into special containers, seal and store, avoid direct sunlight and high temperature environment.
The above is the basic manufacturing method of VAE emulsion, the specific production process needs to be adjusted and optimized according to the product use and performance requirements of the process. At the same time, in order to ensure product quality and environmental protection requirements, but also need to be produced in the production process of wastewater, waste gas and other effective treatment and discharge. In short, the manufacture of VAE emulsions requires mastery of certain chemical technologies and production processes, and at the same time need to strictly comply with relevant environmental regulations and safety regulations to ensure the smooth progress of the production process and product quality is stable and reliable.
