Compositions are disclosed which comprise a thermoplastic polyolefin polymer, an organohalide fire retarding agent, and a triazine as a bloom inhibitor. Preferred bloom inhibitors include melamine, melamine resins obtained when formaldehyde is condensed with melamine, melamine pyrophosphate salts, and substitution products of melamine. A metal compound synergist such as antimony oxide is preferably included.
Flameproof moulding compositions, which are based on polyolefins and made from a pulverulent blend comprising a polyolefin as its essential ingredient and a plurality of flame-retardant ingredients. The flame-retardant ingredients comprise red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation. The moulding compositions contain the flame-retardant ingredients in a total proportion of at most about 30 weight %. Red phosphorus and organic nitrogen compound are used in a quantitative ratio between 99:1 and 1.99.
Polymeric compositions comprising a polyolefin polymer and a flame retarding amount of a compound of the formula ##STR1## wherein each R is independently selected from a group consisting of hydrogen, alkyl, halogenated alkyl, phenyl, and halogenated phenyl groups, said alkyl groups containing from 1 to about 6 carbon atoms and said halogenated groups containing from 1 to about 5 halogen substituents per group, said halogen substituents selected from a group comprising chlorine and bromine; wherein X is selected from a group comprising chlorine and bromine; and wherein n is an integer from 1 to 3, and mixtures thereof.
A phosphorus-containing flame retardant for synthetic resins is produced when suitable amounts of a phosphorus oxide compound of the formula (P.sub.2 O.sub.5).sub.0.5.sub.-1.0 (H.sub.2 O).sub.0.0.sub.-1.5, melamine, and at least one saturated open-chain polyol containing from 5 to 15 carbon atoms and from 4 to 8 hydroxyl groups are combined and heated under such conditions that the resulting product when incorporated into a synthetic resin will not cause significant foaming of the synthetic resin composition when it is subjected to molding conditions but will still impart flame resistance to said synthetic resin.
Improved flameproof moulding compositions, which are based on polyolefins and made from a pulverulent blend comprising a polyolefin as its essential ingredient and a plurality of flame-retardant ingredients. The flame-retardant ingredients comprise red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation. The moulding compositions contain the flame-retardant ingredients in a total proportion of at most about 30 weight %. Red phosphorus and organic nitrogen compound are used in a quantitative ratio between 99:1 and 1:99. The improved moulding compositions contain as a stabilizer A. between about 1 and 10 weight % of amidosulfonic acid or ammonium bisulfate, based on the total quantity of the flame-retardant ingredients, or B. between about 5 and 15 weight % of a paraffin oil having a density between about 0.83 and 0.88 g/cc and a viscosity between about 15 and 380 centipoises, or of a mineral oil boiling within the range 170.degree. and 350.degree.C, or of a silicon oil, based on the quantity of red phosphorus, or C. between about 20 and 50 weight % of pentaerythritol, based on the quantity of organic nitrogen compound.
Organic polymer substrates, for example polyolefins such as polypropylene, can be made flame retardant by the incorporation of a mixture of (i) at least one melamine based flame retardant and (ii) at least one flame retardant selected from the group consisting of the organohalogen and phosphorus containing flame retardants. Further optional flame retardants include antimony compounds and sterically hindered amines.
