Using the alkyl glycoside as initiator,propylene oxide and ethylene oxide as polymeric monomers,and double metal cyanide complex(DMC)as catalyst,a kind of polyether type defoamer with degradability,strong foam breaking and foam inhibiting ability was synthesized by using two-step method.The functionality of this product is 4,number average relative molecular mass is 900～3 500,degradable degree is 92.3％,defoaming rate is 98.8％.
维普
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