What is the emulsifier and its role in the adhesive?
Time：2012-10-25 12:43:21 Hits：3665
Enables two or more immiscible (or partially miscible) liquids (eg oil and water) to form a stable dispersion (emulsion) of the substance, known as the emulsifier.
Its main role is to reduce the interfacial tension between the continuous phase and dispersed phase, to make them easy emulsification and electric double layer is formed on the surface of the droplet (diameter of 0.1 ~ 100μm) or thin flag between droplets, thereby preventing the The mutual condensation, to promote emulsion stability. The emulsifier Li on the surface areas of active agent, based on the hydrophilic nature of the group can be divided into four categories: anionic, cationic, amphoteric and non-ionic type. Commonly used are sodium laurylsulfate, etc..
The emulsifier is mainly used for the preparation of various emulsion adhesives, currently dubbed the adhesive water emulsion, the solution to the pollution, energy conservation is very effective, and therefore developed rapidly. The water-based adhesive is today adhesive development direction into plastic emulsion polymerization or direct emulsification binders is one of the commonly used varieties of construction glue. Emulsifier in the adhesive first is the main resin synthesis to ensure the smooth progress of the emulsion polymerization, and performance to meet the requirements of the main sticky material, such as acrylic emulsion, vinyl acetate latex, ethylene - vinyl acetate emulsion to its emulsifier is added to the emulsion polymerization process. Another type emulsion adhesive is the main resin emulsion formed directly. Such as epoxy latex, styrene - butadiene - styrene (SBS), construction adhesive emulsion. Of course use emulsifiers in the manufacturing, but also the glue remain stable in storage and transportation - including the stability and the viscosity of the emulsion stability of the emulsion particles and remain stable under the ambient condition change. Emulsifier is the architectural water based glue in the manufacture, storage and transport of essential additives.
