Preparation Of Water-based Paint

People's consciousness of environmental protecting imporved, many countries promulgated laws to cortrol the organic volatile in coatings. Under this background, water-borned coatings were boostly developed. Water-borned coatings would be certainly more easy to paint and have excellent film performance in the future, along with coating experts deeply studying the resin configuration. At the same time , many kinds of special used environmental coatings will be invented to satisfy people's requirement.This paper including tree abdges. First abdge introduced the kinds of water-borned coatings, researching level, foreground and markting status and the problem. Second abdge introduced alkyd latex and it's preparation. Third abdge introduced water-based polyurethane, correlative reactions and it's preparation.Experimentation of this paper can be divided into two parts: Alkyd latex and Water-based polyurethane. In Alkyd latex part we choosed emulsifiers, confirmed the dosage of emulsifer and neutralization reagent, confirmed the temperature and optimized emulsification arts. We prepared a stable alkyd emulsion, and research the adding method of dryness katalyst and it's affection on dryness time. We tested the performance of finished product. In water-based polyurethane (WPU) part we choosed materials, synthesized WPU by Acetone Route. We disscussed the factors on film performance which include CNO/OH, DMPA content, soft segment and hard segment and crosslinker content. We optimized the prescription and test the product's performance. The result indicated the two emulsions we prepared have excellent properties and can be used as coatings.