Method for preparing glycosyl amide modified polysiloxane

Abstract

The invention discloses a method for preparing glycosyl amide modified polysiloxane. The method comprises the following steps of: reacting cyclosiloxane, hexamethyldisiloxane and aminosilane serving as raw materials under the action of a catalyst at the temperature of between 30 and 220 DEG C for 4 to 8 hours, wherein the molar ratio of the cyclosiloxane to the aminosilane to the hexamethyldisiloxane is 0.25-2.25:3-5:1; the molar ratio of the catalyst to the sum of the cyclosiloxane, the aminosilane and the hexamethyldisiloxane is 0.1 to 1; inactivating the catalyst after the reaction is finished; performing reduced pressure distillation to obtain the amino-polysiloxane; reacting the amino-polysiloxane and glycosyl lactone or saccharic acid in low-carbon alcohol serving as a solvent at the temperature of between 30 and 200 DEG C for 5 to 10 hours, wherein the molar ratio of primary amine of the amino-polysiloxane to the glycosyl lactone or saccharic acid is 1-5:1; and evaporating off the solvent to obtain the glycosyl amide modified polysiloxane after the reaction is finished. The method has the advantages of low cost, no toxicity and large-scale industrialization.

Description

technical field

[0001] The invention relates to a preparation method of glycosylamide modified polysiloxane. Background technique

[0002] Existing methods for preparing glycosylamide-modified polysiloxanes, such as Feng Shengyu (Carbohydrate Polymer, 2006, 65, 321) reported a method for preparing glycosylamide-modified polysiloxanes. After reacting the ester with allylamine, the hydroxyl group is protected, and then the hydrosilylation reaction is carried out with the hydrogen-containing polysiloxane, and then deprotected to obtain the glycosylamide-modified polysiloxane. German patent DE 4,318,539 reports a method for preparing glycosylamide-modified polysiloxane, and the product is obtained by reacting aminosiloxane with sugar lactone. But aminosiloxanes are obtained by hydrosilylation of allylamines. Wagner R. (Applied Organometallic Chemistry, 1996, 10, 421) reported a method for preparing glycosylamide-modified polysiloxane, and obtained epoxy-modified polysiloxane b...

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