Polymer foams with inherent nonflammability and thermal stability and methods of preparation thereof

A non-flammable polymer foam, comprising:

• a reaction product of at least two precursors, each precursor comprising a chemical composition having a plurality of functional groups pendent to a thermooxidatively stable chemical structure, one precursor being a nitrogen-containing precursor which is a triazine or benzoguanamine ring pendent to which are amine or substituted amino groups, the functional groups of one precursor being rapidly and condensively reactive with the functional groups of the other precursor to form additional thermooxidatively stable chemical structures so as to generate a polymer network while liberating reaction by-products which are vaporous at the reaction temperature, and consequently serve to expand the nascent polymer network.

A non-flammable polymer foam, comprising:

• a reaction product of at least two precursors, each precursor comprising a chemical composition having a plurality of functional groups pendent to a thermooxidatively stable chemical structure;
• one precursor being a nitrogen-containing precursor which is melamine, a hexakis alkylene alkyloxymelamine, a hexakis alkylenecarboxylic acid-or alkylester-melamine, benzoguanamine, a tetrakis alkylene alkyloxybenzoguanamine, a tetrakis alkylenecarboxylic acid-or alkylester-benzoguanamine, a trishydroxylalkyl isocyanurate, or a trisalkyleneoxide isocyanurate;
• the functional groups of one precursor being rapidly and condensively reactive with the functional groups of the other precursor to form additional thermooxidatively stable chemical structures so as to generate a polymer network while liberating reaction by-products which are vaporous at the reaction temperature, and consequently serve to expand the nascent polymer network.

A non-flammable polymer foam, comprising:

• a reaction product of at least two precursors, each precursor comprising a chemical composition having a plurality of functional groups pendent to a thermooxidatively stable chemical structure;
• one precursor being a nitrogen-containing precursor which is a cyanurate, isocyanurate or glycoluril ring and pendent to the nitrogen atoms of the ring are functional groups of the formula ##STR21## wherein R is hydrogen, or a C.sub.1-4 alkyl group and x is 1 to 30;
• the functional groups of one precursor being rapidly and condensively reactive with the functional groups of the other precursor to form additional thermooxidatively stable chemical structures so as to generate a polymer network while liberating reaction by-products which are vaporous at the reaction temperature, and consequently serve to expand the nascent polymer network.