Defoaming composition

Abstract

Abstract PURPOSE: To obtain a defoaming composition that does not lose its defoaming ability during storage by using a hydrocarbon medium and an organosilicone material density-matched to the hydrocarbon medium. CONSTITUTION: The defoaming composition contains a hydrocarbon medium and an alkylmethylsiloxane represented by the formula RIIMe2 SiO(Me2 SiO)m (MeRISiO)n SiMe2 RII or RIIMe2 SiO(MeRISiO)n SiMe2 RII [where (m) is 1-499, n>=1, m+n<=500, RI is methyl and RII is methyl or RI] and density-matched to the hydrocarbon medium or a crosslinked organopolysiloxane-polyoxyalkylene represented by one of the formulae (where RI is an aliphatic carbon group, R' is a divalent organic group or divalent organosiloxane, R" is a terminal group, R''' and R<2> are each H or an aliphatic carbon group, x=1 to 200, c=1 to 5, z=1 to 600, y=1 to 40, x+y+z>=10, a=4 to 40 and b=1 to 40) and density-matched to the hydrocarbon medium. The organosilicone material is present in an amount of <100 volume ppm based on the amount of the hydrocarbon medium.

Inventors

• 👤 Kenneth Christopher Fey
• 👤 クリストファー フェイ ケネス
• 👤 Christopher S Combs
• 👤 スコット コームス クリストファー

Bibliographic Details