Method for preparing aliphatic polythioether
OwnerXinghong Zhang, Chengjian Zhanginventors
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Abstract
A method for preparing aliphatic polythioether is provided. In the method, aliphatic polythioether is obtained by polymerization reaction using a sulfur-carbon compound and an oxygen-containing monomer as raw materials and using Lewis base as a catalyst, and the polymerization reaction is performed under a self-generated pressure at 80˜180° C. Based on the defects of the traditional preparation process of aliphatic polythioether, a bran-new synthetic routine is provided, in which a new process for preparing polythioether in one-pot reaction is achieved through oxygen-sulfur exchange reaction between the sulfur-carbon compound and the oxygen-containing monomer.
Claims5
A method for preparing aliphatic polythioether, which is obtained by polymerization reaction using a sulfur-carbon compound and an oxygen-containing monomer as raw materials and using only bis(triphenylphosphoranyl) ammonium chloride as a catalyst;
- the polymerization reaction is performed under a self-generated pressure at 130˜180° C.;
- a molar ratio of the sulfur-carbon compound to the oxygen-containing monomer is 1 5:1;
- a molar ratio of the catalyst to the oxygen-containing monomer is 1:10˜500;
- the sulfur-carbon compound is selected from at least one of carbon disulfide and carbon oxysulfide;
- the oxygen-containing monomer is selected from at least one of epoxide, oxetane and 3-substituted oxetane.
Dependencies are inferred from the claim text.