Method for preparing a flame retardant modified acrylonitrile-based copolymer and a flame retardant fibrous material
US9109066B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Jan 2, 2014 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Jan 2, 2034 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F1/07
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.