Self-extinguishing polymeric compositions

Self-extinguishing polymeric compositions comprising:

• (a) from 90 to 40 parts by weight of a thermoplastic polymer, or of a polymer endowed with elastomeric properties;
• (b) from 10 to 60 parts by weight of one or more derivatives of 2,4-diamino-1,3,5-triazinyl-6-phosphonic acid having the formula (I):
• ##STR94## wherein:
• the radicals R, which may be the same, or different from each other, are:
• hydrogen;
• C.sub.1 -C.sub.5 alkyl;
• C.sub.3 -C.sub.5 hydroxyalkyl;
• C.sub.3 -C.sub.4 alkenyl;
• cyclohexyl;
• C.sub.6 -C.sub.10 aryl;
• C.sub.7 -C.sub.8 aralkyl;
• or, taken jointly, may constitute a cyclic structure, as:
• ##STR95## the radicals R.sub.1 and R.sub.2, which may be the same, or different from each other, and which may have different meanings on each triazinic ring, are:
• H;
• C.sub.1 -C.sub.18 alkyl;
• C.sub.2 -C.sub.8 alkenyl;
• C.sub.6 -C.sub.16 cycloalkyl or alkylcycloalkyl;
• ##STR96## wherein:
• m=an integer comprised within the range of from 1 to 7;
• p=an integer comprised within the range of from 1 to 5;
• R.sub.4 =H;
• C.sub.1 -C.sub.8 alkyl;
• C.sub.2 -C.sub.6 alkenyl;
• --[--C.sub.q --H.sub.2q --]--O--R.sub.6 wherein q is an integer comprised within the range of from 1 to 4 and R.sub.6 is H or C.sub.1 -C.sub.4 alkyl;
• C.sub.6 -C.sub.12 cycloalkyl or alkylcycloalkyl;
• the radicals R.sub.5, which may be the same, or different from each other, are:
• H;
• C.sub.1 -C.sub.8 alkyl;
• C.sub.2 -C.sub.6 alkenyl;
• C.sub.6 -C.sub.12 cycloalkyl or alkylcycloalkyl;
• C.sub.1 -C.sub.4 hydroxyalkyl;
• or the moiety:
• ##STR97## is replaced by a heterocyclic radical selected from the group consisting of aziridine;
• pyrrolidine;
• piperidine;
• morpholine;
• thiomorpholine;
• piperazine;
• 4-methylpiperazine;
• and 4-ethylpiperazine, linked to the alkyl chain through the nitrogen atom;
• or in the general formula (I) the moiety:
• ##STR98## is replaced by a heterocyclic radical selected from the group consisting of aziridine, pyrrolidine;
• piperidine;
• morpholine;
• thiomorpholine;
• piperazine;
• 4-methylpiperazine;
• 4-ethylpiperazine;
• 2-methylpiperazine;
• 2,5-dimethylpiperazine;
• 2,3,5,6-tetramethylpiperazine;
• 2,2,5,5-tetramethylpiperazine;
• 2-ethylpiperazine;
• and 2,5-diethylpiperazine, linked to the triazinic ring through the nitrogen atom;
• a is 0 (zero) or 1;
• b is 0 (zero) or an integer comprised within the range of from 1 to 5;
• R.sub.3 is hydrogen or:
• ##STR99## and its meaning may vary within each repeating unit;
• when b is 0 (zero), z is a divalent radical falling within the scope of one of the following formulae:
• ##STR100## wherein the radicals R.sub.7, which may be the same or different from each other, are hydrogen or C.sub.1 -C.sub.4 alkyl;
• ##STR101## wherein r is an integer comprised within the range of from 2 to 14;
• R.sub.8 is hydrogen;
• C.sub.1 -C.sub.4 alkyl;
• C.sub.2 -C.sub.6 alkenyl;
• C.sub.1 -C.sub.4 hydroxyalkyl;
• ##STR102## wherein s is an integer comprised within the range of from 2 to 5 and t is an integer comprised within the range of from 1 to 3;
• ##STR103## wherein:
• X is a direct C--C bond;
• O;
• S;
• S--S;
• SO;
• SO.sub.2 ;
• NH;
• NHSO.sub.2 ;
• NHCO;
• N.dbd.N;
• CH.sub.2 ;
• R.sub.9 is hydrogen;
• hydroxy;
• C.sub.1 -C.sub.4 alkyl;
• C.sub.1 -C.sub.4 alkoxy;
• ##STR104## wherein A may be a saturated or unsaturated ring;
• ##STR105## wherein s has the above defined meaning;
• when, on the contrary, b is an integer comprised within the range of from 1 to 5, the moiety:
• ##STR106## is a multivalent radical falling within the scope of one of the following formulae:
• ##STR107## wherein:
• R.sub.10 is hydrogen or C.sub.1 -C.sub.4 alkyl;
• c is an integer comprised within the range of from 1 to 5;
• the indexes s, which may be the same, or different from each other, have the same meaning as defined above;
• ##STR108## wherein:
• R.sub.10 has the same meaning as defined above;
• w is an integer comprised within the range of from 2 to 4;
• and
• d is either 1 or 2.