| abstract |
(57) [Summary] [Object] An object of the present invention is to provide an antifoaming composition having an improved initial foam breaking property without lowering the foam suppression persistence and having a low risk of ignition. is there. [Structure] The antifoam composition of the present invention has an average molecular weight of 20. It is characterized by comprising 60 to 99 parts by weight of one or more polyoxyalkylene compounds represented by the following formula (1), which is 0 to 10000, and 1 to 40 parts by weight of water. Depending on 100 parts by weight of the above composition, The solubilizer can be added in an amount of 0.1 to 30 parts by weight. R 1 (-X-A-Y-R 2 ) m (1) [wherein A is one or more random and / or block addition polymers of alkylene oxides having 2 to 8 carbon atoms, R 1 and R 2 are hydrogen atoms or organic groups having 24 or less carbon atoms, X and Y are ester bonds, ether bonds or urethane bonds, and m is an integer of 1-8. ] |