09-08-2018 дата публикации
Номер: US20180223043A1
Принадлежит:
The invention relates to a preparation method of green nylon poly butyrolactams, the biological materials of GABA in vacuum under the condition of high temperature melt decomposition and purified butyrolactams, then by vacuum polymerization of green nylon poly butyrolactams. Compared with the prior art, the invention is prepared by biological method for the synthesis of a wide range of sources, to solve the problem of raw material supply PA4 for mass production, reduce the cost of reaction, and the reaction condition is simple, easy to implement simplified synthesis steps, from the laboratory to the transformation of industrial production. 1. a method for preparing green nylon poly butyrolactams , characterized in that the method is the biological materials of GABA in vacuum under the condition of high temperature melt decomposition and purified butyrolactams , then by vacuum polymerization of green nylon poly butyrolactams.2. according to claim 1 , a method for preparing green nylon poly (amide) is described:(1) high temperature melting: gamma aminobutyric acid in nitrogen atmosphere, stirring, and then at 200-225 DEG C. under the high temperature conditions of full melting, get a small amount of water in the micro yellow oily liquid;(2) vacuum purification: the preparation of a small yellow oily liquid containing a small amount of water in the vacuum drying chamber at a temperature of 70 DEG C., so that after the evaporation of water to produce a purified yellow oily liquid;(3): the catalyst is added to vacuum polymerization of purified butyrolactams, nitrogen removal in the reactor air, oil bath is heated to 50 DEG C., stirring until the continuous reaction, catalyst and butyrolactams complete reaction, then adding initiator, polymerization conditions remain unchanged, 8˜15 h will continue to reflect, at last the reaction product is water and acetone cleaning and drying, the white solid product of nylon 4.3. According to a green nylon poly butyrolactams ...
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