Alkylphenol polyoxyethylene ether surfactants have good emulsifying properties and are common raw materials for silicone oil emulsifiers, however, the by-products and their final metabolites in the production process are highly toxic and can not meet the EU requirements on environmentally friendly surfactants. The non-ionic surfactant complex system without alkylphenol polyoxyethylene ether as silicone oil emulsifier was studied in this paper. The experiments were designed and optimized with uniform design software. Under the condition that the quality fraction of emulsifier was 7%, different kinds of non-ionic surfactants were used as emulsifiers to determine the value range of each factor and set an appropriate level within this range. According to factor number and level number, the appropriate uniform design table was selected for factor horizontal data arrangement, and the experimental points in the uniform design table were tested. The obtained experimental data were analyzed by regression analysis, the regression model was established, and the optimized experimental points of the regression equation were verified experimentally. The synergistic effect of surfactants and the effect on the stability of emulsified silicone oil were investigated. The optimal environmentally friendly nonionic silicone oil emulsifier without alkylphenol polyoxyethylene was obtained.

The mixed petroleum resin emulsion prepared from theC ₅ and C ₉ petroleum resin were modified with maleic anhydride. The effects of the mixing ratio between theC ₅ and C ₉ petroleum resin，amount of maleic rosin and maleic anhydride, modification time and the alkali liquor on properties of the emulsion were discussed. The results showed that the optimum process conditions were: C ₅ petroleum resin/C ₉ petroleum resin mixing ratio of 1∶3, maleic anhydride mass fraction of 1.5%, maleic rosin mass fraction of 9%, NaOH mass fraction of 2%, petroleum resin modification temperature of 200 ℃, petroleum resin modification time of 3 h, and modified petroleum resin emulsion/wax emulsion mixing ratio of 1∶2.