A reactive mixture comprising a Fire, Smoke and Toxicity retardant (FST) composition for making a polyisocyanurate and/or polyurethane (PIR/PUR) comprising material, said FST composition comprising: a) at least one compound having at least one ethylenically unsaturated moiety having a number average equivalent weight<160 g/mol, and b) optionally one or more radical initiator compound characterized in that the onset temperature for radical polymerization (T.sub.onset) of the ethylenically unsaturated compound with or without the radical initiator is 2° C. up to 40° C. lower than the maximum reaction temperature achieved during the process for making the PIR/PUR material (reaction exotherm (T.sub.reaction)).

A reactive mixture comprising a Fire, Smoke and Toxicity retardant (FST) composition for making a polyisocyanurate and/or polyurethane (PIR/PUR) comprising material, said FST composition comprising: a) at least one compound having at least one ethylenically unsaturated moiety having a number average equivalent weight<160 g/mol, and b) optionally one or more radical initiator compound characterized in that the onset temperature for radical polymerization (T.sub.onset) of the ethylenically unsaturated compound with or without the radical initiator is 2° C. up to 40° C. lower than the maximum reaction temperature achieved during the process for making the PIR/PUR material (reaction exotherm (T.sub.reaction)).

A reactive mixture comprising a Fire, Smoke and Toxicity retardant (FST) composition for making a polyisocyanurate and/or polyurethane (PIR/PUR) comprising material, said FST composition comprising: a) at least one compound having at least one ethylenically unsaturated moiety having a number average equivalent weight<160 g/mol, and b) optionally one or more radical initiator compound characterized in that the onset temperature for radical polymerization (T.sub.onset) of the ethylenically unsaturated compound with or without the radical initiator is 2° C. up to 40° C. lower than the maximum reaction temperature achieved during the process for making the PIR/PUR material (reaction exotherm (T.sub.reaction)).

A functionalized graphene oxide nitrile rubber and A tooth-scar-free tooth block is provided. The functionalized graphene oxide nitrile rubber comprises the following components in parts by weight: 100-140 parts of nitrile rubber, 30-90 parts of a functionalized graphene oxide nitrile rubber masterbatch, 1.8-2.52 parts of a vulcanizing agent, 1.2-1.68 parts of a vulcanization accelerator, 5-7 parts of a vulcanization activator, 17-23.8 parts of a plasticizer, 2-2.8 parts of antioxidant, 59-86.6 parts of a filler, 0.1-0.14 parts of a curing agent, and 2-2.8 parts of dichlorophenol. The functionalized graphene oxide nitrile rubber above has excellent mechanical properties, a wide applicable temperature range and strong stability in use, and can be prepared into a tooth-scar-free tooth block.

A functionalized graphene oxide nitrile rubber and A tooth-scar-free tooth block is provided. The functionalized graphene oxide nitrile rubber comprises the following components in parts by weight: 100-140 parts of nitrile rubber, 30-90 parts of a functionalized graphene oxide nitrile rubber masterbatch, 1.8-2.52 parts of a vulcanizing agent, 1.2-1.68 parts of a vulcanization accelerator, 5-7 parts of a vulcanization activator, 17-23.8 parts of a plasticizer, 2-2.8 parts of antioxidant, 59-86.6 parts of a filler, 0.1-0.14 parts of a curing agent, and 2-2.8 parts of dichlorophenol. The functionalized graphene oxide nitrile rubber above has excellent mechanical properties, a wide applicable temperature range and strong stability in use, and can be prepared into a tooth-scar-free tooth block.

The present invention aims to provide a urethane resin and a heat dissipation component each having excellent thermal conductivity and excellent flexibility. The present invention relates to a curable composition containing: a polyol (A); a polyisocyanate (B); at least one dispersant (C) for inorganic fillers selected from the group consisting of a phosphate ester (C1), a C12-C24 fatty acid (C2), a sucrose fatty acid ester (C3), a sorbitan fatty acid ester (C4), and a glycerol fatty acid ester (C5); and an inorganic filler (D), the curable composition satisfying the following requirements (1) to (3) that (1) the polyol (A) contains a polyalkylene glycol (A1) having a chemical formula weight or number average molecular weight of 1000 or less in an amount of 50% by weight or more based on the weight of the polyol (A); (2) the inorganic filler (D) is contained in an amount of 70 to 97% by weight based on the weight of the curable composition; and (3) the total weight of the dispersant (C) for inorganic fillers is 1 to 5 parts by weight per 100 parts by weight of the inorganic filler (D), the phosphate ester (C1) being represented by the following formula (1):

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The present invention aims to provide a urethane resin and a heat dissipation component each having excellent thermal conductivity and excellent flexibility. The present invention relates to a curable composition containing: a polyol (A); a polyisocyanate (B); at least one dispersant (C) for inorganic fillers selected from the group consisting of a phosphate ester (C1), a C12-C24 fatty acid (C2), a sucrose fatty acid ester (C3), a sorbitan fatty acid ester (C4), and a glycerol fatty acid ester (C5); and an inorganic filler (D), the curable composition satisfying the following requirements (1) to (3) that (1) the polyol (A) contains a polyalkylene glycol (A1) having a chemical formula weight or number average molecular weight of 1000 or less in an amount of 50% by weight or more based on the weight of the polyol (A); (2) the inorganic filler (D) is contained in an amount of 70 to 97% by weight based on the weight of the curable composition; and (3) the total weight of the dispersant (C) for inorganic fillers is 1 to 5 parts by weight per 100 parts by weight of the inorganic filler (D), the phosphate ester (C1) being represented by the following formula (1):

##STR00001##

Provided are a resin composition that is capable of imparting excellent mechanical strength to a molded article and has excellent dimensional stability during molding, a molded article thereof, and a method for producing the resin composition. For a resin composition containing a polyolefin-based resin and a nucleating agent, a ratio t2/t1 between an isothermal crystallization time t2 at 135° C. of the resin composition and an isothermal crystallization time t1 at 135° C. of a nucleating agent-free resin composition having the same formulation as the resin composition except that the nucleating agent is not contained is 0.45 or more.

Provided are a resin composition that is capable of imparting excellent mechanical strength to a molded article and has excellent dimensional stability during molding, a molded article thereof, and a method for producing the resin composition. For a resin composition containing a polyolefin-based resin and a nucleating agent, a ratio t2/t1 between an isothermal crystallization time t2 at 135° C. of the resin composition and an isothermal crystallization time t1 at 135° C. of a nucleating agent-free resin composition having the same formulation as the resin composition except that the nucleating agent is not contained is 0.45 or more.

The present invention relates to a transparent polyimide film containing a polyimide and a phosphate ester. The content of the phosphate ester based on 100 parts by mass of the polyimide is 3 parts by mass or more, preferably 5 to 100 parts by mass. It is preferable to use a phosphate ester that has a high birefringence reduction effect and with which a decrease in the tensile modulus of the film is small. In production of the polyimide film, it is preferable to employ a method in which: a solvent-soluble polyimide resin and a phosphate ester are dissolved in an organic solvent exhibiting solubility with respect to the polyimide resin to prepare a polyimide solution; the polyimide solution is applied onto a substrate; and the organic solvent is removed.