Abstract: An aliphatic polyester resin composition, useful for producing molded articles without causing deformation at the mold release time, has a non-copolymerized mixture of an aliphatic polyester resin including one or more polylactic acid resins and a crystallization nucleating agent including one or more metal salts of an aromatic sulfonate of Formula 1: where X is a residual group obtained by removing three hydrogen atoms from benzene, R1 and R2 are each hydrocarbon group with 1-6 carbon atoms, M is one or more selected from the group of potassium atom, rubidium atom, barium atom, strontium atom and calcium atom, and n is 1 if M is alkali metal atom and 2 if M is alkali earth metal atom; the aliphatic polyester resin composition contains 0.01-5 weight parts of the one or more metal salts of aromatic sulfonate shown by Formula 1 for 100 weight parts of the aliphatic polyester resin.

Abstract: Molded articles with improved physical characteristics are obtained under molding conditions for general resin without causing deformation at the mold releasing time if a composition containing aliphatic polyester resin and one or more metal salts of aromatic sulfonate of a specified kind is used. Such a composition is placed inside a mold maintained at a temperature below the crystallization-initiating temperature by differential scanning calorimetry and above the glass transition temperature is molded while it crystallizes.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1×10?3–1 and/or a chlorine ion content in the range of 1×10?1–1×103 ppm.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight %, having the melt beginning temperature obtained by melting point measurement in differential thermal analysis within the range of 300–310° C. and/or the weight loss beginning temperature obtained by thermogravimetric measurement within the range of 270–305° C.

Abstract: A charge control agent containing a calcium salt of a sulfoisophthalic acid compound. A toner for developing an electrostatic latent image including the above charge control agent, a binder resin and a colorant.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1×10?3-1 and/or a chlorine ion content in the range of 1×10?1-1×103 ppm.

Abstract: An ultraviolet radiation absorbent is produced by a method including specified Step A, Step B and Step C. Step A is a process of causing an amidation of anthranilic acid and terephthaloyl dichloride in the presence of a solvent and an alkali to generate N,N?-bis(o-carboxyphenylterephthalamid) and separating a solid component containing N,N?-bis(o-carboxyphenylterephthalamid) generated by this amidation. Step B is a process of separating a solid component containing cyclic imino ester compound of a specified kind. Step C is a process of processing the solid component separated in Step B with an alkaline solution and further washing with water to obtain the ultraviolet radiation absorbent for thermoplastic polymers containing cyclic imino ester compound of the specified kind.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1×10−3-1 and/or a chlorine ion content in the range of 1×10−1-1×103 ppm.

Abstract: A charge control agent containing a barium salt of a sulfoisophthalic acid compound and optionally a metal salt of a salicylic acid compound. A toner for developing an electrostatic latent image comprising such a charge control agent, a binder resin and a colorant.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1×10−3-1 and/or a chlorine ion content in the range of 1×10−1-1×103 ppm.

Abstract: A charge control agent containing a calcium salt of a sulfoisophthalic acid compound. A toner for developing an electrostatic latent image including the above charge control agent, a binder resin and a colorant.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight %, having the melt beginning temperature obtained by melting point measurement in differential thermal analysis within the range of 300-310° C. and/or the weight loss beginning temperature obtained by thermogravimetric measurement within the range of 270-305° C.

Abstract: An ultraviolet radiation absorbent for thermoplastic polymer materials such as polyethylene terephthalate or polycarbonate contains cyclic imino ester compound of a specified structure in an amount of over 99.5 weight % and less than 100 weight % and having an acid value in the range of 1×10−3-1 and/or a chlorine ion content in the range of 1×10−1-1×103 ppm.

Abstract: A charge control agent containing a barium salt of a sulfoisophthalic acid compound and optionally a metal salt of a salicylic acid compound. A toner for developing an electrostatic latent image comprising such a charge control agent, a binder resin and a colorant.