Method for preparing a flame retardant modified acrylonitrile-based copolymer and a flame retardant fibrous material
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United States of America Patent
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Aug 18, 2015
Grant Date -
Jul 2, 2015
app pub date -
Jan 2, 2014
filing date -
Jan 2, 2014
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Abstract
A method for preparing a flame retardant modified acrylonitrile-based copolymer, includes: prepolymerizing a first composition to obtain a first prepolymer solution including a first prepolymer; prepolymerizing a second composition to obtain a second prepolymer solution including a second prepolymer; and mixing the first and second prepolymer solutions and subjecting a mixture of the first and second prepolymers to polymerization to obtain a flame retardant modified acrylonitrile-based copolymer solution containing a flame retardant modified acrylonitrile-based copolymer.
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