2 were mixed heated to 50 80 u00b0 c and fully stirred the system was kept at a constant temperature 30 40 of the component d and 85 of the component c were slowly added thereto while stirring and the ph was regulated to 6 5 7 the above emulsion was homogenized and was diluted with the balance amount of the component c and component d and then the component f was added to obtain the defoaming agent product with corresponding solid content the defoaming agents in comparative examples 1 14 were respectively prepared as per the formulae in table 3 in each comparative example the defoaming agent with corresponding solid content was prepared respectively using the process in example 1 or example 9 the washing machine used in the test was a drum washing machine of zanussi brand model zwh6125 capacity 7 kg test method 50 g of detergent available on the market 0 1 g of the prepared orgnaosilicone emulsion and 20 kg of water were added to the washing machine and then the program for cotton and linen was selected the view window of the washing machine is marked with 5 scale values respectively representing 0 25 50 75 and 100 height of the view window u201c 0 u201d is the start representing no foam while u201c 100 u201d represents full of foam the foam height was recorded once every 5minutes and was recorded at the time of stop the higher the value is the foam scale value in the washing machine is and the worse the defoaming performance is the lower the.