A prepreg including an epoxide resin matrix system and fibrous reinforcement, at least partially impregnated by the epoxide resin matrix system, the epoxide resin matrix system having the components: a. a mixture of (i) at least one epoxide-containing resin and (ii) at least one catalyst for curing the at least one epoxide-containing resin; and b. a plurality of solid fillers for providing fire retardant properties to the fibre-reinforced composite material formed after catalytic curing of the at least one epoxide-containing resin, and wherein the fibrous reinforcement is a woven fabric ply of an interwoven mixture of glass fibres and carbon fibres, the woven fabric ply has a weight of from 350 to 550 g/m.sup.2 and is from 40 to 95 wt % glass fibres and from 5 to 60 wt % carbon fibres, each based on the weight of the woven fabric ply, and the proportion by weight of carbon fibres, expressed as C in wt %, in the woven fabric ply is defined by the formula:

[00001]$C\ge \left(-0.0048W+2.0858\right)\times 100\%,$ where W is the weight of the woven fabric ply in g/m.sup.2,
and the proportion by weight of glass fibres, expressed as G wt %, in the woven fabric ply is defined by the formula: G=(100−C) %.

A prepreg including an epoxide resin matrix system and fibrous reinforcement, at least partially impregnated by the epoxide resin matrix system, the epoxide resin matrix system having the components: a. a mixture of (i) at least one epoxide-containing resin and (ii) at least one catalyst for curing the at least one epoxide-containing resin; and b. a plurality of solid fillers for providing fire retardant properties to the fibre-reinforced composite material formed after catalytic curing of the at least one epoxide-containing resin, and wherein the fibrous reinforcement is a woven fabric ply of an interwoven mixture of glass fibres and carbon fibres, the woven fabric ply has a weight of from 350 to 550 g/m.sup.2 and is from 40 to 95 wt % glass fibres and from 5 to 60 wt % carbon fibres, each based on the weight of the woven fabric ply, and the proportion by weight of carbon fibres, expressed as C in wt %, in the woven fabric ply is defined by the formula:

[00001]$C\ge \left(-0.0048W+2.0858\right)\times 100\%,$ where W is the weight of the woven fabric ply in g/m.sup.2,
and the proportion by weight of glass fibres, expressed as G wt %, in the woven fabric ply is defined by the formula: G=(100−C) %.

The present disclosure provides a core-shell particle including a core including a porous substrate and a flame retardant, and a shell including a thermoplastic polymer and covering the core, and a secondary battery, a module, and a device including the same.

An object of the present invention is to provide a flame-retardant woody material having low hygroscopicity and excellent flame-retardant performance, and a flame retardant for woody materials therefor. The present invention relates to a flame retardant for woody materials comprising an organic phosphorus compound represented by the following formula (1) and a nitrogen compound represented by the following formula (2); and also relates to a flame-retardant woody material comprising a woody material fireproofed with the flame retardant for woody materials: ##STR00001## wherein in the formula (1), R.sub.1 and R.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; n is an integer of 1 to 4; X.sub.1 and X.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; and ##STR00002## wherein in the formula (2), R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are the same or different, and each represents a hydrogen atom, methyl, or the like.

An object of the present invention is to provide a flame-retardant woody material having low hygroscopicity and excellent flame-retardant performance, and a flame retardant for woody materials therefor. The present invention relates to a flame retardant for woody materials comprising an organic phosphorus compound represented by the following formula (1) and a nitrogen compound represented by the following formula (2); and also relates to a flame-retardant woody material comprising a woody material fireproofed with the flame retardant for woody materials: ##STR00001## wherein in the formula (1), R.sub.1 and R.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; n is an integer of 1 to 4; X.sub.1 and X.sub.2 are the same or different, and each represents a hydrogen atom, hydroxy, or the like; and ##STR00002## wherein in the formula (2), R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are the same or different, and each represents a hydrogen atom, methyl, or the like.

Flame-retardant mixtures containing: a) salt of phosphinic acid of formula (I), wherein R1 and R2 mean, independently of each other, alkyl-, cycloalkyl-, aryl- or aralkyl, substituted as applicable, M is m-valent cation, and m means 1 to 4, b) salt of phosphinic acid of formula (II), differing from component a), wherein R3 means substituted, as applicable, alkyl-, cycloalkyl-, cycloalkyl-alkyl, aryl- or aralkyl, preferably with alkyl radicals as substituents, R4 is alkyl having even number of carbon atoms (if R1 and/or R2 are alkyl, R4 has double, triple or quadruple the number of carbon atoms of R1 or R2), M is n-valent cation and n means 1 to 4, c) organylphosphonate, d) phosphite, e) as applicable, a representative selected from the group consisting of triazine complex, polyphosphate, hypophosphite, nitrogenous diphosphate, organophosphate, phosphazene and/or polyphosphonate, f) as applicable, a representative selected from the group consisting of metal hydroxide, metal carbonate, metal borate, zinc stannate and/or intumescence additive, and g) as applicable, pigment, wherein at least one of components e) and/or f) must be present in the mixture. The mixtures can use thermoplastic and elastomeric polymers to produce flame-retardant polymer compositions, which are exceptionally suitable for producing cable sheathing or cable insulation.

Flame-retardant mixtures containing: a) salt of phosphinic acid of formula (I), wherein R1 and R2 mean, independently of each other, alkyl-, cycloalkyl-, aryl- or aralkyl, substituted as applicable, M is m-valent cation, and m means 1 to 4, b) salt of phosphinic acid of formula (II), differing from component a), wherein R3 means substituted, as applicable, alkyl-, cycloalkyl-, cycloalkyl-alkyl, aryl- or aralkyl, preferably with alkyl radicals as substituents, R4 is alkyl having even number of carbon atoms (if R1 and/or R2 are alkyl, R4 has double, triple or quadruple the number of carbon atoms of R1 or R2), M is n-valent cation and n means 1 to 4, c) organylphosphonate, d) phosphite, e) as applicable, a representative selected from the group consisting of triazine complex, polyphosphate, hypophosphite, nitrogenous diphosphate, organophosphate, phosphazene and/or polyphosphonate, f) as applicable, a representative selected from the group consisting of metal hydroxide, metal carbonate, metal borate, zinc stannate and/or intumescence additive, and g) as applicable, pigment, wherein at least one of components e) and/or f) must be present in the mixture. The mixtures can use thermoplastic and elastomeric polymers to produce flame-retardant polymer compositions, which are exceptionally suitable for producing cable sheathing or cable insulation.

A method for the deposition of an organic intumescent coating on a glass sheet, includes the preparation of an organic intumescent coating composition by mixing a latex having a pH from 4 to 6 and an intumescent agent chosen from thermally degradable polycarboxylic acids, and the application of the organic intumescent coating composition to the glass sheet.

The present invention relates to halogen-free flame retardant compositions, comprising polyolefins polymers as active ingredient and a flame retardant system. The flame retardant system comprises at least an Hypophosphorous acid metal salt (preferred is Aluminium hypophosphite) as main flame retardant component, at least a sterically hindered N-alkoxyamine with a specific structure as first flame retardant synergic component, at least a silicon oxide or aluminium oxide or a mixture thereof with specific properties as second flame retardant synergic component.

The present invention relates to halogen-free flame retardant compositions, comprising polyolefins polymers as active ingredient and a flame retardant system. The flame retardant system comprises at least an Hypophosphorous acid metal salt (preferred is Aluminium hypophosphite) as main flame retardant component, at least a sterically hindered N-alkoxyamine with a specific structure as first flame retardant synergic component, at least a silicon oxide or aluminium oxide or a mixture thereof with specific properties as second flame retardant synergic component.