Abstract: Five kinds of reagents, such as silicone surfactant, foaming agent and foam stabilizer and etc., were screened by orthogonal experiment. The foaming ratio, 25% liquid separation time of the compound system were tested by self-designed oscillating device of mechanical arm.The thermal stability time of the compound system was determined by the self-designed foam heat resistance measurement device.The orthogonal experiment was designedas 5 factors and 4 levels. The results showed that the silicone surfactant, foaming agent and foam stabilizer have a good synergistic effect,and the 25% liquid separation time of the compounding system is more than 10 times higher than that of the single organosilicone surfactant. The comprehensive analysis of foaming ratio, 25% liquid separation time and foam thermal stability time of the system showed that when the concentration ratio of Si-4903, APG, BS-12, xanthan gum and 6501 is 10∶20∶10∶1∶1, the foam performance is the best.

Key words: silicone surfactant, orthogonal experiment, expansion ratio, 25% liquid separation time, foam thermal stability