Abstract: The present invention provides a stabilizer containing, as a main component, a bisphenol monoester and a bisphenol-based compound, wherein the area of the bisphenol-based compound is 0.15 to 70 when the area of the bisphenol monoester is set to be 100 in a chromatograph obtained by liquid chromatography analysis of the stabilizer, a method of manufacturing the same, a thermoplastic polymer composition containing the stabilizer, as well as a stabilizer that can further improve the process stability of the thermoplastic polymer, as compared with the conventional one, by compounding the stabilizer into the thermoplastic polymer through a method of stabilizing the thermoplastic polymer using the stabilizer and a method of manufacturing the stabilizer.

Abstract: A rotation molded body obtained by rotation molding of a polyolefin composition comprising a polyolefin and a phosphite of the formula (I).

Abstract: A bisphenol monoester compound represented by the formula (1): (in the formula (1), Rs each represent independently a hydrogen atom or a methyl group, and R? represents an alkyl group of a carbon number of 1 to 6, or a hydrogen atom).

Abstract: The present invention provides a bisphenol monoester-based stabilizer composition that can improve resistance to discoloration at high temperature of a thermoplastic polymer compared with a conventional one using a bisphenol monoester-based stabilizer composition including a bisphenol monoester-based compound mainly, wherein a compound represented by the following formula: is contained in an area percentage by liquid chromatography analysis of 0.1 to 3%, a thermoplastic polymer composition and a method of manufacturing the thermoplastic polymer composition, a thermoplastic polymer molded product, and a method of stabilizing a thermoplastic polymer, as well as a thermoplastic polymer composition in which resistance to discoloration at high temperature is improved by using the stabilizer composition and a method of manufacturing the thermoplastic polymer composition, a thermoplastic polymer molded product, and a method of stabilizing a thermoplastic polymer.

Abstract: A thermoplastic polymer composition having excellent resistance to heat discoloration has been desired. There is provided a thermoplastic polymer composition characterized by comprising a thermoplastic polymer, phosphites represented by the formula (I), and at least one kind of erythritols selected from the group consisting of pentaerythritol, dipentaerythritol and tripentaerythritol: wherein R1, R2, R4 and R5 each independently denotes a hydrogen atom, an alkyl group or the like, and R3 denotes a hydrogen atom or an alkyl group; X denotes a single bond, a sulfur atom or a —CHR6 group (R6 denotes a hydrogen atom, an alkyl group or a cycloalkyl group); A denotes an alkylene group or a *—COR7 group (R7 denotes a single bond or an alkylene group, and * denotes a bonding hand on the side of oxygen), and one of Y and Z denotes a hydroxyl group or the like, and the other one of Y and Z denotes a hydrogen atom or an alkyl group).

Abstract: A rotation molded body obtained by rotation molding of a polyolefin composition comprising a polyolefin and a phosphite of the formula (I).

Abstract: Recently, further improved process stability for thermoplastic polymer compositions has been demanded. Phenol compositions are provided comprising a compound represented by the formula (1): in the formula (1), R1 and R2 are each independently an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 18 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; R3 is an alkyl group having 1 to 3 carbon atoms; and R4 is a hydrogen atom or a methyl group, and a compound represented by the formula (2): in the formula (2), R5 and R6 are each independently an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; and R7 is a hydrogen atom or a methyl group, in a weight ratio of 1:99 to 99:1.

Abstract: A process for producing a thermoplastic resin composition, comprising melting-kneading a thermoplastic resin and a neutralizing agent, and melting-kneading the melting-kneaded product obtained in a first step and a compound (I): wherein two R1s, two R2s, R4 and R5 each represent independently a hydrogen atom, an alkyl group etc.; two R3s each represent independently a hydrogen atom or an alkyl group; X represents a single bond, a sulfur atom or a —CHR6— group, wherein R6 represents a hydrogen atom, an alkyl group etc.; A represents an alkylene group or a *—COR7— group, wherein R7 represents a single bond or an alkylene group, and a symbol * represents a bond with an oxygen atom of a >P—O— portion; one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkyloxy group, and the other of Y and Z represents a hydrogen atom, or an alkyl group.

Abstract: A thermoplastic polymer composition having excellent resistance to heat discoloration has been desired. There is provided a thermoplastic polymer composition characterized by comprising a thermoplastic polymer, phosphites represented by the formula (I), and at least one kind of erythritols selected from the group consisting of pentaerythritol, dipentaerythritol and tripentaerythritol: wherein R1, R2, R4 and R5 each independently denotes a hydrogen atom, an alkyl group or the like, and R3 denotes a hydrogen atom or an alkyl group; X denotes a single bond, a sulfur atom or a —CHR6 group (R6 denotes a hydrogen atom, an alkyl group or a cycloalkyl group); A denotes an alkylene group or a *—COR7 group (R7 denotes a single bond or an alkylene group, and * denotes a bonding hand on the side of oxygen), and one of Y and Z denotes a hydroxyl group or the like, and the other one of Y and Z denotes a hydrogen atom or an alkyl group).

Abstract: An object of the present invention is to provide a process for producing a thermoplastic resin composition with a further improved hue, containing a neutralizing agent, and a compound (I). There is provided a process for producing a thermoplastic resin composition, comprising a second step of melting-kneading a melting-kneaded product obtained in a first step, and a compound (I). (wherein two R1s, two R2s, R4 and R5 each represent independently a hydrogen atom, an alkyl group etc., two R3s each represent independently a hydrogen atom or an alkyl group, X represents a single bond, a sulfur atom or a —CHR6— group, wherein R6 represents a hydrogen atom, an alkyl group etc., A represents an alkylene group or a *—COR7— group, wherein R7 represents a single bond or an alkylene group, and a symbol * represents a bond with an oxygen atom of a >P—O— portion, one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkyloxy group, and the other of Y and Z represents a hydrogen atom, or an alkyl group.

Abstract: A bisphenol monoester compound represented by the formula (1): (in the formula (1), Rs each represent independently a hydrogen atom or a methyl group, and R? represents an alkyl group of a carbon number of 1 to 6, or a hydrogen atom).

Abstract: The present invention provides a bisphenol monoester-based stabilizer composition that can improve resistance to discoloration at high temperature of a thermoplastic polymer compared with a conventional one using a bisphenol monoester-based stabilizer composition including a bisphenol monoester-based compound mainly, wherein a compound represented by the following formula: is contained in an area percentage by liquid chromatography analysis of 0.1 to 3%, a thermoplastic polymer composition and a method of manufacturing the thermoplastic polymer composition, a thermoplastic polymer molded product, and a method of stabilizing a thermoplastic polymer, as well as a thermoplastic polymer composition in which resistance to discoloration at high temperature is improved by using the stabilizer composition and a method of manufacturing the thermoplastic polymer composition, a thermoplastic polymer molded product, and a method of stabilizing a thermoplastic polymer.

Abstract: The present invention provides a stabilizer containing, as a main component, a bisphenol monoester and a bisphenol-based compound, wherein the area of the bisphenol-based compound is 0.15 to 70 when the area of the bisphenol monoester is set to be 100 in a chromatograph obtained by liquid chromatography analysis of the stabilizer, a method of manufacturing the same, a thermoplastic polymer composition containing the stabilizer, as well as a stabilizer that can further improve the process stability of the thermoplastic polymer, as compared with the conventional one, by compounding the stabilizer into the thermoplastic polymer through a method of stabilizing the thermoplastic polymer using the stabilizer and a method of manufacturing the stabilizer.

Abstract: An object of the present invention is to provide a novel thermoplastic resin composition with improved processing stability, thermal coloration resistance and NOx coloration resistance. Another object of the present invention is to provide a method for stabilizing a thermoplastic resin by improving processing stability, thermal coloration resistance and NOx coloration resistance of the thermoplastic resin. There are provided a thermoplastic resin composition, which comprises phosphite esters represented by the following general formula (I): a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, and hydrotalcite in a thermoplastic resin, and a method for stabilizing a thermoplastic resin, which comprises incorporating phosphite esters represented by the general formula (I), a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, and hydrotalcite into a thermoplastic resin.