Polyamide composition comprising a flame retardant polyester and method for preparing it
AssigneePolyTechnyl, SAS
InventorThierry Badel
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Abstract
The invention relates to a thermoplastic polymer composition, in particular to a polyamide composition, having improved flame-retardant properties by maintaining its good physical properties. Furthermore, the invention relates to a method of preparing said thermoplastic polymer composition and to shaped articles, in particular fibers, made of the thermoplastic polymer composition of the invention and that have excellent properties in order to ensure adequate fire protection.
Claims15
A thermoplastic polymer composition comprising a polyamide and a phosphorous-containing polymer, wherein the phosphorous-containing polymer is obtained by polycondensation of
- a) at least one phosphorous-containing monomer selected from adducts of
- a1) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and/or nuclear substituted DOPO derivatives, with
- a2) at least one unsaturated di- or multivalent carboxylic acid or ester or anhydride thereof;
- b) at least one divalent alcohol comprising an alkyl, cycloalkyl or alkylaryl backbone with 4 to 16 carbon atoms and with a main carbon chain of at least three carbon atoms between the hydroxyl groups of the divalent alcohol;
- and
- c) optionally other monomers, said other monomers being other than unsaturated di- or multivalent carboxylic acids, and
- wherein the amount of acid end-groups present in the phosphorous-containing polymer is lower than the amount of hydroxyl end-groups present in said polymer.
A flame-retardant polymer comprising a phosphorous containing polymer in a polyamide composition, wherein the phosphorous-containing polymer is obtained by polycondensation of
- a) at least one phosphorous-containing monomer selected from adducts of
- a1) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and/or nuclear substituted DOPO derivatives, with
- at least one unsaturated di- or multivalent carboxylic acid a2) or ester or anhydride thereof;
- b) at least one divalent alcohol comprising an alkyl, cycloalkyl or alkylaryl backbone with 4 to 16 carbon atoms and with a main carbon chain of at least three carbon atoms between the hydroxyl groups of the divalent alcohol;
- and
- c) optionally other monomers, said other monomers being other than unsaturated di- or multivalent carboxylic acids, and
- wherein the amount of acid end-groups present in the polymer is lower than the amount of hydroxyl end-groups present in the polymer.
Dependencies are inferred from the claim text.