77 can be used as a standard additive. It has good wettability, excellent acid and alkali resistance and temperature resistance. Due to its excellent wetting property, it can be applied in spraying, roller coating, dipping and swab coating process. It is suitable for printing ink and varnish and used as a wetting and leveling agent. It can be used as a primary or secondary emulsifier for emulsion polymerization and can be used in the production of many types of emulsions. In addition, it can be used as post additive in various emulsions including pure acrylic, styrene-acrylic, vinyl acetate-acrylate and butylbenzene. It has excellent effects in terms of reducing surface tension, improving flow and leveling performance, enhancing the wetting and coating performance of the emulsion on the substrate surface.