Sumitomo Chemical Company, Limited

Ryoji Soma

Kenji Kimura

Masatsugu Akiba

Toyomochi Tamato

Naoki Inui

Yoshikazu Kimura

Natsuko Sato

Tatsumi Nuno

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.

Stabilizer and method of manufacturing the same, thermoplastic polymer composition using the same, and method of stabilizing thermoplastic polymer

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

Rotation molded body

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).

Bisphenol monoester compound

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.

Bisphenol monoester-based stabilizer composition, thermoplastic polymer composition and method of manufacturing the same, thermoplastic polymer molded product, and method of stabilizing thermoplastic polymer

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: 

Thermoplastic polymer composition

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 Rs, two Rs, Rand Reach represent independently a hydrogen atom, an alkyl group etc.; two Rs each represent independently a hydrogen atom or an alkyl group; X represents a single bond, a sulfur atom or a &#x2014;CHR&#x2014; group, wherein Rrepresents a hydrogen atom, an alkyl group etc.; A represents an alkylene group or a *&#x2014;COR&#x2014; group, wherein Rrepresents a single bond or an alkylene group, and a symbol * represents a bond with an oxygen atom of a &#x3e;P&#x2014;O&#x2014; 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.

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Nara, Japan

Ryoji Soma