The present invention provides a non-halogen-based flame retardant composition and flame retardant resin composition wherein a small amount of addition achieves an excellent flame retardancy, an amount of elution of a flame retardant from the thermoplastic resin is extremely small even under high temperature and high humidity, and it has water-resistant property. A phosphate ester amide compound of general formula (I), a nitrogen-containing compound having a 1,3,5-triazine structure or 1,3,5-triazine fused ring structure, and optionally, a metal oxide or metal salt are used together. Further optionally, a dripping inhibitor is blended. ##STR00001##
wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently hydrogen or C.sub.1-3 alkyl, R.sub.11, R.sub.12, R.sub.13 and R.sub.14 are each independently C.sub.1-3 alkylene, R.sub.15 is C.sub.1-6 alkylene, and R.sub.5 and R.sub.6 are each independently hydrogen or C.sub.1-6 alkyl.

The present invention relates to a thermosetting adhesive film and a coverlay film comprising the same, and more specifically to a thermosetting adhesive film which has excellent ion migration resistance while having a low dielectric permittivity, as well as excellent peel-off strength, and to a coverlay film comprising the thermosetting adhesive film.

The present invention discloses a crystalline aluminum phosphite, preparation and an application thereof. The compound has the following structural formula (I):

##STR00001##

where, x is an integer of 1-6; n, y and p are an integer of 1-4; M is Ca, Mg, Al, Zn, Fe, Sn or Ti. The preparation method includes: after dissolving phosphorous acid and hydrogen phosphite into water, adding concentrated phosphoric acid for reaction at 80-90° C., then performing drying at low temperature, dehydration reaction at high temperature, washing and drying. The compound has very high thermal decomposition temperature, high phosphorus content, and good flame retardant property, low water absorption and low acidity; moreover, the compound can serve as a halogen-free flame retardant component of high polymer materials.

A process for preparing a flame retardant composition, the process comprising: adding to a container at least one flame retardant salt, a nitrogen-containing compound, and optionally water; and mixing the contents of the container to give a dispersed mixture or dissolved solution comprising the flame retardant composition; wherein the at least one flame retardant salt comprises an ammonium salt of phosphoric acid; wherein the ammonium salt of phosphoric acid comprises water soluble ammonium polyphosphate (APP); wherein the water soluble ammonium polyphosphate has a total nitrogen as N from about 5 to about 15 weight percent, and a total phosphorus as P.sub.2O.sub.5 from about 30 to about 40 weight percent, based on the total weight of the ammonium polyphosphate (APP).

A process for preparing a flame retardant composition, the process comprising: adding to a container at least one flame retardant salt, a nitrogen-containing compound, and optionally water; and mixing the contents of the container to give a dispersed mixture or dissolved solution comprising the flame retardant composition; wherein the at least one flame retardant salt comprises an ammonium salt of phosphoric acid; wherein the ammonium salt of phosphoric acid comprises water soluble ammonium polyphosphate (APP); wherein the water soluble ammonium polyphosphate has a total nitrogen as N from about 5 to about 15 weight percent, and a total phosphorus as P.sub.2O.sub.5 from about 30 to about 40 weight percent, based on the total weight of the ammonium polyphosphate (APP).

Flame retardant mixtures, flame-retardant polymer compositions, cables endowed therewith and use thereof What are described are flame retardant mixtures comprising a) salt of a phosphinic acid of the formula (I) in which R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, aryl or aralkyl that are optionally substituted, M is an m-valent cation, and m is 1 to 4, b) salt of a phosphinic acid of the formula (II) that differs from component a) in which R.sub.3 is optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl, preferably with alkyl radicals as substituents, R.sub.4 is alkyl with an even number of carbon atoms, with the proviso that, if R.sub.1 and/or R.sub.2 are alkyl, R.sub.4 has twice, three times or four times the number of carbon atoms of R.sub.1 or R.sub.2, M is an n-valent cation, and n is 1 to 4, c) organylphosphonate, d) phosphite, e) silicate, alumosilicate and/or silicon dioxide which is solid at 25° C., f) a representative selected from the group of triazine complex, polyphosphate, hypophosphite, nitrogen-containing diphosphate, organophosphate, phosphazene and/or polyphosphonate, g) optionally a representative selected from the group of metal hydroxide, metal carbonate, metal borate, zinc stannate and/or intumescent additive, and h) optionally pigment. The mixtures can be used for production of flame-retardant polymer compositions comprising thermoplastic and elastomeric polymers that are of excellent suitability for production of cable sheaths or cable insulations.

##STR00001##

Flame retardant mixtures, flame-retardant polymer compositions, cables endowed therewith and use thereof What are described are flame retardant mixtures comprising a) salt of a phosphinic acid of the formula (I) in which R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, aryl or aralkyl that are optionally substituted, M is an m-valent cation, and m is 1 to 4, b) salt of a phosphinic acid of the formula (II) that differs from component a) in which R.sub.3 is optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl, preferably with alkyl radicals as substituents, R.sub.4 is alkyl with an even number of carbon atoms, with the proviso that, if R.sub.1 and/or R.sub.2 are alkyl, R.sub.4 has twice, three times or four times the number of carbon atoms of R.sub.1 or R.sub.2, M is an n-valent cation, and n is 1 to 4, c) organylphosphonate, d) phosphite, e) silicate, alumosilicate and/or silicon dioxide which is solid at 25° C., f) a representative selected from the group of triazine complex, polyphosphate, hypophosphite, nitrogen-containing diphosphate, organophosphate, phosphazene and/or polyphosphonate, g) optionally a representative selected from the group of metal hydroxide, metal carbonate, metal borate, zinc stannate and/or intumescent additive, and h) optionally pigment. The mixtures can be used for production of flame-retardant polymer compositions comprising thermoplastic and elastomeric polymers that are of excellent suitability for production of cable sheaths or cable insulations.

##STR00001##

A forest fire retardant composition contains a retardant compound that includes a phosphate salt. The phosphate salt may include diammonium phosphate, diammonium orthophosphate, monoammonium phosphate, monoammonium orthophosphate, monosodium phosphate, disodium phosphate, disodium phosphate hydrate, sodium ammonium phosphate, sodium ammonium phosphate hydrate, sodium tripolyphosphate, trisodium phosphate, or dipotassium phosphate, and combinations thereof. The forest fire retardant composition may include an ammonium source. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention relates to a mixture containing as component A at least one organic phosphinic acid salt and as component B at least one alkali metal stannate (M′.sub.2SnO.sub.3), alkali metal hydroxyl stannate (M′.sub.2Sn(OH).sub.6), alkaline earth metal stannate (M″SnO.sub.3) and/or alkaline earth metal hydroxy stannate (M″Sn(OH).sub.6). The invention relates also to the use of such a mixture.

The invention relates to a mixture containing as component A at least one organic phosphinic acid salt and as component B at least one alkali metal stannate (M′.sub.2SnO.sub.3), alkali metal hydroxyl stannate (M′.sub.2Sn(OH).sub.6), alkaline earth metal stannate (M″SnO.sub.3) and/or alkaline earth metal hydroxy stannate (M″Sn(OH).sub.6). The invention relates also to the use of such a mixture.