梳形氨基聚醚有机硅的合成及其在消泡剂中的应用

SYNTHESIS OF COMB-SHAPED AMINO SILICONE POLYETHER AND APPLICATION IN DEFOAMER

八甲基环四硅氧烷与N，N-二甲基-γ-乙氨丙基-γ-氨丙基甲基二甲氧基硅烷、N—β-氨乙基-γ-氨丙基甲基二甲氧基硅烷单体聚合制备了氨基硅，再与环氧聚醚反应，得到梳形氨基聚醚有机硅。用IR、^1H NMR对产物结构进行了表征，并将其应用于消泡剂的复配中。最佳复配工艺配方：不同黏度的二甲基硅油／氨基聚醚有机硅／气相白炭黑／乳化剂（Span-60、Tween-60，HLB值=9）／增稠稳定剂／去离子水（质量比）=24：4：3：4：1：64。

Comb-shaped amino silicone polyether was synthesized by epoxy polyether and amino silicon,which were synthesized by octamethylcyclotetrasiloxane with N, N-dimethyl-γ-aminopropyl-γ- aminopropyl methyl dimethoxysilane, N-β-aminoethyl-γ-aminopropyl methyl dimethoxylsilane and hexamethyldisiloxane. The structures of aminosiloxane and amino silicone polyether were characterized by IR and ^1H NMR. The composite defoamer was formulated with following composition （weight basis）： 24% dimethyl silicone oil of different viscosity, 4% amino silicone polyether, 3% fumed silica, 4% emulsifier （Span-60, Tween-60, HLB value = 9）, 1% thickening stabilizers, and 64% deionized water.