Patent attributes
Silicone antifoaming agent of the present invention demonstrates excellent antifoaming effect with regard to aqueous foaming systems, and is especially suitable for use in conjunction with inks where it significantly suppresses development of cissing during use of ink. The silicone antifoaming agent is characterized by comprising a polyoxyalkylene-modified silicone that has polyoxyalkylene groups expressed by general formula (1) and (2) given below and contains 10 to 200 diorganosiloxane units in one molecule, said polyoxyalkylene-modified silicone satisfying the following conditions: 3≦E≦90 and 0.01≦E/(E+P)≦0.45, wherein P is the total number of oxypropylene units (—C3H6O—) and E is the total number of oxyethylene units (—C2H4O—) contained in one molecule.
