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发明授权
US07105581B2 Antifoam formulations 有权
消泡剂配方

Antifoam formulations
摘要：
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.
摘要（中）：

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）

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