A flame-retardant thermoplastic polyurethane resin composition is provided, containing: a thermoplastic polyurethane resin; at least one melamine salt selected from the group consisting of melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate; at least one piperazine salt selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate, and piperazine polyphosphate; and wet process silica having an oil absorption of 200 ml/100 g or more. The composition preferably contains zinc oxide.

A non-halogenated flame retardant polyamide composition is disclosed which comprises a polyamide, a non-halogenated flame retardant, and a synergist. The polyamide may have a ratio of carboxylic acid to amine end groups of greater than 1.8. Products formed from the composition are also disclosed. The polyamide may comprise nylon 6,6.

A non-halogenated flame retardant polyamide composition is disclosed which comprises a polyamide, a non-halogenated flame retardant, and a synergist. The polyamide may have a ratio of carboxylic acid to amine end groups of greater than 1.8. Products formed from the composition are also disclosed. The polyamide may comprise nylon 6,6.

Polyolefin compositions comprising i) a polyolefin, ii) one or more phosphorus-containing benzofuranone compounds and iii) one or more hindered phenolic antioxidants are provided excellent protection against discoloration and enhanced thermal stability during melt processing as exhibited by improved retention of molecular weight and maintenance of polymer molecular architecture.

Polyolefin compositions comprising i) a polyolefin, ii) one or more phosphorus-containing benzofuranone compounds and iii) one or more hindered phenolic antioxidants are provided excellent protection against discoloration and enhanced thermal stability during melt processing as exhibited by improved retention of molecular weight and maintenance of polymer molecular architecture.

The invention relates to flame-retardant polyamide compositions comprising polyamide having a melting point of not more than 290 C. as component A, fillers and/or reinforcers as component B, phosphinic salt of the formula (I) as component C

##STR00001##

in which R.sub.1 and R.sub.2 are ethyl,
M is Al, Fe, TiO.sub.p or Zn,
m is 2 to 3, and
p=(4m)/2 compound selected from the group of the Al, Fe, TiO.sub.p and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component D phosphonic salt of the formula (II) as component E

##STR00002##

in which R.sub.3 is ethyl,
Met is Al, Fe, TiO.sub.q or Zn,
n is 2 to 3, and
q=(4n)/2 melamine polyphosphate having an average degree of condensation of 2 to 200 as component F, sterically hindered phenolic antioxidant as component G, and/or organic phosphite and/or organic phosphonite as component H.

The polyamide compositions can be used for production of fibers, films and shaped bodies, especially for applications in the electricals and electronics sector.

The invention relates to flame-retardant polyamide compositions comprising polyamide having a melting point of not more than 290 C. as component A, fillers and/or reinforcers as component B, phosphinic salt of the formula (I) as component C

##STR00001##

in which R.sub.1 and R.sub.2 are ethyl,
M is Al, Fe, TiO.sub.p or Zn,
m is 2 to 3, and
p=(4m)/2 compound selected from the group of the Al, Fe, TiO.sub.p and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component D phosphonic salt of the formula (II) as component E

##STR00002##

in which R.sub.3 is ethyl,
Met is Al, Fe, TiO.sub.q or Zn,
n is 2 to 3, and
q=(4n)/2 melamine polyphosphate having an average degree of condensation of 2 to 200 as component F, sterically hindered phenolic antioxidant as component G, and/or organic phosphite and/or organic phosphonite as component H.

The polyamide compositions can be used for production of fibers, films and shaped bodies, especially for applications in the electricals and electronics sector.

A levoglucosan-based flame retardant compound, a process for forming a flame retardant polymer, and an article of manufacture comprising a polymer that contains the levoglucosan-based flame retardant compound. The levoglucosan-based flame retardant compound has phosphorus-based flame retardant functional groups. At least one of the phosphorus-based flame retardant groups includes a phenyl substituent. The process for forming the flame retardant polymer includes providing a phosphorus-based flame retardant molecule, providing levoglucosan, chemically reacting the phosphorus-based flame retardant molecule and the levoglucosan derivative to form a levoglucosan-based flame retardant compound, and incorporating the levoglucosan-based flame retardant compound into a polymer by covalent binding to form the levoglucosan-based flame retardant polymer.

A levoglucosan-based flame retardant compound, a process for forming a flame retardant polymer, and an article of manufacture comprising a polymer that contains the levoglucosan-based flame retardant compound. The levoglucosan-based flame retardant compound has phosphorus-based flame retardant functional groups. At least one of the phosphorus-based flame retardant groups includes a phenyl substituent. The process for forming the flame retardant polymer includes providing a phosphorus-based flame retardant molecule, providing levoglucosan, chemically reacting the phosphorus-based flame retardant molecule and the levoglucosan derivative to form a levoglucosan-based flame retardant compound, and incorporating the levoglucosan-based flame retardant compound into a polymer by covalent binding to form the levoglucosan-based flame retardant polymer.

A polyethylene pipe comprising components A) and B), wherein component A) is a hindered amine light stabilizer containing a triazine residue, component B) is a natural or synthetic hydrotalcite and the weight ratio of component A) to component B) is 1:10 to 10:1.