Self-extinguishing polymeric compositions comprising oligomeric 2,4-diamino-6-hydroxy-1,3,5-triazines and phosphates and/or phosphonates

Self-extinguishing polymeric compositions comprising:

• a) from 89 to 40 parts by weight of a thermoplastic polymer or of a polymer having elastomeric properties;
• b) from 8 to 33 parts by weight of one or more phosphates and/or phosphonates of ammonium or of amine;
• c) from 3 to 27 parts by weight of one or more oligomeric compounds derived from 2,4-diamino-6-hydroxy-1,3,5-triazine, having the general formula (I):
• ##STR57## wherein:
• R=hydrogen;--C.sub.m H.sub.2m --Y wherein
• m is an integer comprised from 1 and 8;
• Y is hydrogen;
• CN;--O(C.sub.1 -C.sub.4)-alkyl;
• --O(C.sub.2 -C.sub.4)-alkenyl;
• (C.sub.6 -C.sub.12)-cycloalkyl or-alkylcycloalkyl;
• --O(C.sub.6 -C.sub.12)-aryl;
• ##STR58## wherein radicals R.sub.1, equal or different among them, are (C.sub.1 -C.sub.4)-alkyl or (C.sub.3 -C.sub.4)-alkenyl;
• or the group:
• ##STR59## is replaced by a heterocyclic radical bound to the alkyl chain through the nitrogen atom, and optionally containing another heteroatom;
• (C.sub.2 -C.sub.6)-alkenyl;
• (C.sub.6 -C.sub.12)-cycloalkyl or -alkylcycloalkyl;
• n=integer comprised between 2 and 50;
• Z is a bivalent or polyvalent radical comprised in one of the following formulae:
• ##STR60## wherein radicals R.sub.2, equal or different among them, are hydrogen or (C.sub.1 -C.sub.4)-alkyl;
• ##STR61## wherein q is an integer comprised between 2 and 14;
• R.sub.3 is hydrogen;
• (C.sub.1 -C.sub.4)-alkyl;
• (C.sub.2 -C.sub.6)-alkenyl;
• (C.sub.1 -C.sub.4)-hydroxyalkyl;
• ##STR62## wherein s is an integer comprised between 2 and 5 and t is an integer comprised between 1 and 3;
• ##STR63## wherein X is a direct bond C--C;
• O;
• S;
• S--S;
• SO;
• SO.sub.2 ;
• NH;
• NHSO.sub.2 ;
• NHCO;
• N.dbd.N;
• CH.sub.2 ;
• R.sub.4 is hydrogen;
• hydroxyl;
• (C.sub.1 -C.sub.4)-alkyl;
• (C.sub.1 -C.sub.4)-alkoxy;
• ##STR64## wherein A can be a saturated or unsaturated cycle;
• ##STR65## wherein s has the previously defined meaning;
• ##STR66## wherein:
• R.sub.5 is hydrogen or (C.sub.1 -C.sub.4)-alkyl;
• p is an integer comprised between 1 and 5;
• indexes s, equal or different among them, have the previously defined meaning;
• ##STR67## wherein:
• R.sub.5 has the previously defined meaning;
• r is an integer comprised between 2 and 4;
• v is 1 or 2.