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    • 10. 发明授权
    • Antifoam formulations
    • 消泡剂配方
    • US07105581B2
    • 2006-09-12
    • US10703940
    • 2003-11-07
    • Willibald BurgerHolger RautschekChristian Herzig
    • Willibald BurgerHolger RautschekChristian Herzig
    • B01D19/04C08G77/18C08L83/12
    • B01D19/0409D21H21/12
    • An antifoam formulations comprise (A) antifoam agent based on siloxanes and (B) branched polyether/polysiloxane copolymers comprising structural units of the formula Y[—CnH2n—(R2SiO)m—Ap—R2Si—G]x  (I) in which Y is a multivalent, optionally heteroatom-containing hydrocarbon radical, R are monovalent optionally halogenated hydrocarbon radicals, A is a radical —R2Si—R2—(R2SiO)m—, G is a monovalent radical —CfH2f-2k—Z or a divalent radical —CnH2n— bonded to a radical Y, Z —(R6)v—(OCH2CH2)a[OCH2CH(CH3)]b[OCH2CH(CH2CH3)]c—OR3, in which R3 is hydrogen, a hydrocarbon radical, or a radical R—C(O)—, R6 is a divalent hydrocarbon radical, v is 0 or 1, a, b and c are 0 or an integer between 1 and 1000, the sum (a+b+c) being from 2 to 2000, x is 3 to 10, f is 2 to 12, k is 0 or 1, n is 2 to 12, m is at least 1, and p is 0 or a positive integer, the branched polyether/polysiloxane copolymers (B) containing on average at least one group Z.
    • 消泡剂制剂包含(A)基于硅氧烷的消泡剂和(B)包含结构单元的支化聚醚/聚硅氧烷共聚物,其包含式<?in-line-formula description =“In-Line Formulas”end =“lead”→> Y (-C 2)n - (R 2 SiO)m - - - - - - - - - (I)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中 Y是多价,任选地含杂原子的烃基,R是一价任意卤代的烃基,A是基团-R 2 -Si-R 2 - (R SUB > 2 SiO)m - ,G是单价基团-C 2 H 2 f-2k -Z或二价基团-C n - 键合到基团Y,Z <βin-line-formula description =“In-line Formulas”end =“lead”→> - (R 6))] > 3 ,<?in-line-formula description =“In-line Formulas”end =“tail”?>其中R 3是氢,烃基或基团 RC(O) - ,R 6是二价烃基,v是0或1,a,b和c是0或1和1000之间的整数,总和(a + b + c )为2〜2000,x为3〜10,f为2〜12,k为0或1,n为2〜12,m为1以上,p为0或正整数, 含有平均至少一个基团Z的聚硅氧烷共聚物(B)