| abstract |
The invention discloses an in-situ polymerization flame retardant, which is derived nfrom the following monomers: diacid monomer A: Al is terephthalic acid, A2 is nphosphorus diacid monomer of reactive flame retardant containing aromatic ring, Al n+ A2 = 100mol%, Al = 50-90mol%, A2 = 10-50mol%; Diamine monomer B: one or nmore diamine monomers containing 4-36 carbon atoms. The invention obtains a nnovel flame retardant by in-situ polymerization of phosphorus series reactive flame nretardant diacid monomer containing aromatic ring in semi aromatic polyamide noligomer, which has the advantages of no precipitation in semi aromatic polyamide, ndoes not affect other properties of semi aromatic polyamide, and has excellent flame nretardant performance. |