The present invention provides a water-soluble polymer composition which is suppressed in decrease of the viscosity over time if formed into an aqueous solution that contains iron ions. A water-soluble polymer composition which contains a water-soluble polymer, a phenolic antioxidant and an inorganic salt other than a transition metal salt, wherein the content of the inorganic salt is from 0.001 part by mass to 10 parts by mass relative to 100 parts by mass of the water-soluble polymer.

A curable epoxy composition suitable for surface application, comprising one or more epoxy resin (s); 2, 4, 6-tribromophenyl end-capped tetrabromobisphenol A epoxy-based flame retardant; and phosphorus-containing compound selected from the group consisting of one or more of: ammonium polyphosphate; resorcinol bis (diphenyl phosphate); and liquid alkylated triphenyl phosphate ester. The composition is substantially Sb.sub.2O.sub.3-free.

A curable epoxy composition suitable for surface application, comprising one or more epoxy resin (s); 2, 4, 6-tribromophenyl end-capped tetrabromobisphenol A epoxy-based flame retardant; and phosphorus-containing compound selected from the group consisting of one or more of: ammonium polyphosphate; resorcinol bis (diphenyl phosphate); and liquid alkylated triphenyl phosphate ester. The composition is substantially Sb.sub.2O.sub.3-free.

A thermoplastic and thermoset foam nucleation additive, which is added to a foamed material, includes a gas absorbent and a nano-compound, wherein the nano-compound and the gas absorbent are mixed to form the thermoplastic and thermoset foam nucleation additive. The gas absorbent includes a central structure and a short chain structure, wherein a first chemical bond is formed between the short chain structure and the central structure. The nano-compound includes a base structure and a long chain structure, wherein a second chemical bond is formed between the long chain structure and the base structure. A number of carbon atoms in the short chain structure is not less than 8, and a molecular weight of the long chain structure is higher than 10000 g/mole.

A thermoplastic and thermoset foam nucleation additive, which is added to a foamed material, includes a gas absorbent and a nano-compound, wherein the nano-compound and the gas absorbent are mixed to form the thermoplastic and thermoset foam nucleation additive. The gas absorbent includes a central structure and a short chain structure, wherein a first chemical bond is formed between the short chain structure and the central structure. The nano-compound includes a base structure and a long chain structure, wherein a second chemical bond is formed between the long chain structure and the base structure. A number of carbon atoms in the short chain structure is not less than 8, and a molecular weight of the long chain structure is higher than 10000 g/mole.

A method for producing a thermally conductive sheet S includes a step of obtaining a thermally conductive composition by mixing a reactive liquid resin, which forms a rubbery or gelatinous matrix when crosslinked, a volatile liquid having a boiling point 10° C. or more higher than a curing temperature of the reactive liquid resin, and a thermally conductive filler; a step of forming a molded body by crosslinking and curing the reactive liquid resin at a temperature 10° C. or more lower than the boiling point of the volatile liquid; and a step of evaporating the volatile liquid by heating the molded body, in which these steps are performed sequentially.

A method for producing a thermally conductive sheet S includes a step of obtaining a thermally conductive composition by mixing a reactive liquid resin, which forms a rubbery or gelatinous matrix when crosslinked, a volatile liquid having a boiling point 10° C. or more higher than a curing temperature of the reactive liquid resin, and a thermally conductive filler; a step of forming a molded body by crosslinking and curing the reactive liquid resin at a temperature 10° C. or more lower than the boiling point of the volatile liquid; and a step of evaporating the volatile liquid by heating the molded body, in which these steps are performed sequentially.

The present invention concerns an aqueous dispersion comprising particles of water-soluble polymer of average molecular weight higher than or equal to 0.5 million daltons, or of water-swellable polymer, and a mixture of at least one sulfate salt and at least one phosphate salt in weight proportions of between 25:75 and 75:25.

The present invention concerns an aqueous dispersion comprising particles of water-soluble polymer of average molecular weight higher than or equal to 0.5 million daltons, or of water-swellable polymer, and a mixture of at least one sulfate salt and at least one phosphate salt in weight proportions of between 25:75 and 75:25.

The invention concerns a stabilising composition, comprising: at least one antioxidant comprising one or more of: a phenolic antioxidant, a phosphite antioxidant, a sulphur-containing antioxidant, and an aminic antioxidant; and at least one buffering agent, wherein the buffering agent has the capacity to buffer in aqueous solution at a pH range from 4 to 8.