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    • 25. 发明授权
    • Fluorosilicone antifoam
    • 氟硅酮消泡剂
    • US5454979A
    • 1995-10-03
    • US111807
    • 1993-08-25
    • Hideki KobayashiToru Masatomi
    • Hideki KobayashiToru Masatomi
    • B01D19/04C08L83/08
    • B01D19/0409C08L83/08
    • A fluorosilicone antifoam having excellent and persistent anti foam activity against foaming in aqueous or organic solvent solutions in which a silicone surfactant or fluorosurfactant is dissolved. The fluorosilcione antifoam includes(A)(a) a fluorosilicone oil with the general formulaF(CF.sub.2).sub.a C.sub.2 H.sub.4 SiMe.sub.2 O(Me.sub.2 SiO).sub.n SiMe.sub.2 C.sub.2 H.sub.4 (CF.sub.2).sub.a F in which a is an integer with a value of at least 4, n is an integer with a value of 0 to 300, and Me is methyl, or(b) a fluorosilicone oil with the general formulaXR.sub.2 SiO[F(CF.sub.2).sub.a C.sub.2 H.sub.4 SiMeO].sub.n SiR.sub.2 X in which R is a monovalent hydrocarbon group, X is the F(CF.sub.2).sub.a C.sub.2 H.sub.4 group or a monovalent hydrocarbon group with the proviso that at least 1 of X is the F(CF.sub.2).sub.a C.sub.2 H.sub.4 group, n is an integer with a value of 1 to 300, and a is an integer with a value of at least 4;(B) microparticulate silica with a specific surface of at least 50 m.sup.2 /g; and(C) a fluoroalkyl-containing alkoxysilane with the general formulaF(CF.sub.2).sub.b C.sub.2 H.sub.4 Si(OR.sup.1).sub.3in which b is an integer with a value of at least 1 and R.sup.1 is a monovalent hydrocarbon group having no more than 6 carbons or partial hydrolyzates thereof.
    • 氟硅氧烷消泡剂具有优异且持久的抗泡沫活性,在水溶液或有机溶剂溶液中发泡,其中有机硅表面活性剂或含氟表面活性剂被溶解。 氟代西门酮消泡剂包括(A)(a)具有通式F(CF 2)aC 2 H 4 SiMe 2 O(Me 2 SiO)n SiMe 2 C 2 H 4(CF 2)a F的氟硅油,其中a是至少为4的整数,n是具有 值为0〜300,Me为甲基,或(b)具有通式XR2SiO [F(CF2)aC2H4SiMeO] nSiR2X的氟硅油,其中R为单价烃基,X为F(CF2)aC2H4基团或 一价烃基,条件是X的至少1个为F(CF 2)aC 2 H 4基团,n为值为1至300的整数,a为至少4的整数; (B)比表面积至少为50m 2 / g的微粒二氧化硅; 和(C)具有通式F(CF 2)b C 2 H 4 Si(OR 1)3的含氟烷基的烷氧基硅烷,其中b为至少为1的整数,R 1为不大于6个碳的部分或全部的一价烃基 其水解产物。