Provided are a resin additive composition which is excellent in fluidity and can impart excellent physical properties to a thermoplastic resin, a thermoplastic resin composition, and a molded article thereof. A resin additive composition is composed of a phosphoric acid ester compound (A) represented by the following general formula (1): ##STR00001##
(in the formula (1), R.sup.1 to R.sup.4 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 9 carbon atoms, and R.sup.5 represents an alkylidene group having 1 to 4 carbon atoms) and a fatty acid sodium salt (B) represented by the following general formula (2): ##STR00002##
(in the formula (2), R.sup.6 represents a group introduced From an aliphatic organic acid having 7 to 30 carbon atoms), and the mass ratio of (B)/(A) is 0.55 to 2.0.

A curable resin composition containing quantum dots (A), a resin (B), a photopolymerizable compound (C), a photopolymerization initiator (D), an antioxidant (E), and a solvent (F), wherein a water content based on a total mass of the curable resin composition is 50 ppm or more and less than 5000 ppm.

A curable resin composition containing quantum dots (A), a resin (B), a photopolymerizable compound (C), a photopolymerization initiator (D), an antioxidant (E), and a solvent (F), wherein a water content based on a total mass of the curable resin composition is 50 ppm or more and less than 5000 ppm.

Disclosed is a polypropylene resin composition which contains a polypropylene-based polymer containing, as monomer units, propylene and at least one copolymerization monomer of ethylene or α-olefins with carbon atom number of 4 or more. Proportion of the monomer units derived from the copolymerization monomer in the polypropylene-based polymer is 2 to 10% by mass based on the mass of the polypropylene-based polymer. A crystallization half-time at 110° C. of the polypropylene resin composition is 20 seconds or shorter.

Disclosed is a polypropylene resin composition which contains a polypropylene-based polymer containing, as monomer units, propylene and at least one copolymerization monomer of ethylene or α-olefins with carbon atom number of 4 or more. Proportion of the monomer units derived from the copolymerization monomer in the polypropylene-based polymer is 2 to 10% by mass based on the mass of the polypropylene-based polymer. A crystallization half-time at 110° C. of the polypropylene resin composition is 20 seconds or shorter.

A method for producing a resin composition of the present invention is a method for producing a resin composition, the method including a step of obtaining a resin composition by heating and melt-kneading a mixture containing a particulate nucleating agent in which D.sub.50 is equal to or more than 0.1 μm and equal to or less than 300 μm and a thermoplastic resin using a twin screw extruder (100) including, inside a cylinder (10), a screw (50) having kneading discs (60), in which the step of obtaining a resin composition includes an extrusion step of extruding the mixture supplied into the twin screw extruder (100) in an ejection direction under kneading conditions in which X and Y satisfy 4.0≤X in a range of 6.0×10.sup.3≤Y≤7.0×10.sup.4 when a volume-based ejection amount is denoted by X (10.sup.−6.Math.kg.Math.h.sup.−1.Math.mm.sup.−3), and a strain rate is denoted by Y (min.sup.−1).

A method for producing a resin composition of the present invention is a method for producing a resin composition, the method including a step of obtaining a resin composition by heating and melt-kneading a mixture containing a particulate nucleating agent in which D.sub.50 is equal to or more than 0.1 μm and equal to or less than 300 μm and a thermoplastic resin using a twin screw extruder (100) including, inside a cylinder (10), a screw (50) having kneading discs (60), in which the step of obtaining a resin composition includes an extrusion step of extruding the mixture supplied into the twin screw extruder (100) in an ejection direction under kneading conditions in which X and Y satisfy 4.0≤X in a range of 6.0×10.sup.3≤Y≤7.0×10.sup.4 when a volume-based ejection amount is denoted by X (10.sup.−6.Math.kg.Math.h.sup.−1.Math.mm.sup.−3), and a strain rate is denoted by Y (min.sup.−1).

A method for producing a resin composition of the present invention is a method for producing a resin composition, the method including a step of obtaining a resin composition by heating and melt-kneading a mixture containing a particulate nucleating agent in which D.sub.50 is equal to or more than 0.1 μm and equal to or less than 300 μm and a thermoplastic resin using a twin screw extruder (100) including, inside a cylinder (10), a screw (50) having kneading discs (60), in which the step of obtaining a resin composition includes an extrusion step of extruding the mixture supplied into the twin screw extruder (100) in an ejection direction under kneading conditions in which X and Y satisfy 4.0≤X in a range of 6.0×10.sup.3≤Y≤7.0×10.sup.4 when a volume-based ejection amount is denoted by X (10.sup.−6.Math.kg.Math.h.sup.−1.Math.mm.sup.−3), and a strain rate is denoted by Y (min.sup.−1).

Provided are a flame retardant composition that provides a flame-retardant synthetic resin composition excellent in flame retardance and in longitudinal and lateral balance in terms of mold shrinkage factor, and a flame-retardant synthetic resin composition using the same and a molded body thereof. A flame retardant composition contains 0.005 to 5 parts by mass of component (B) based on 100 parts by mass of component (A), wherein component (A) is phosphoric acid salt-based flame retardant and component (B) is one or more compounds each having a structure represented by the following general formula (1):

##STR00001##

In the formula, R.sup.1 to R.sup.4 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.5 represents a direct bond or an alkanediyl group having 1 to 4 carbon atoms, M.sup.1 represents any of an alkali metal, an alkali earth metal, zinc, aluminum and a hydrogen atom, n is 1 and m is 0 when M.sup.1 represents an alkali metal or a hydrogen atom, n is 2 and m is 0 when M.sup.1 represents an alkali earth metal or zinc, and n is 1, 2 or 3 and m is an integer represented by 3-n when M.sup.1 represents aluminum.

Provided are a flame retardant composition that provides a flame-retardant synthetic resin composition excellent in flame retardance and in longitudinal and lateral balance in terms of mold shrinkage factor, and a flame-retardant synthetic resin composition using the same and a molded body thereof. A flame retardant composition contains 0.005 to 5 parts by mass of component (B) based on 100 parts by mass of component (A), wherein component (A) is phosphoric acid salt-based flame retardant and component (B) is one or more compounds each having a structure represented by the following general formula (1):

##STR00001##

In the formula, R.sup.1 to R.sup.4 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.5 represents a direct bond or an alkanediyl group having 1 to 4 carbon atoms, M.sup.1 represents any of an alkali metal, an alkali earth metal, zinc, aluminum and a hydrogen atom, n is 1 and m is 0 when M.sup.1 represents an alkali metal or a hydrogen atom, n is 2 and m is 0 when M.sup.1 represents an alkali earth metal or zinc, and n is 1, 2 or 3 and m is an integer represented by 3-n when M.sup.1 represents aluminum.