| 摘要 |
<p>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:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="44" wi="88" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" /></Chemistry>
wherein R<Sup>1</Sup>, R<Sup>2</Sup>, R<Sup>4</Sup> and R<Sup>5</Sup> each independently denotes a hydrogen atom, an alkyl group or the like, and R<Sup>3</Sup> denotes a hydrogen atom or an alkyl group; X denotes a single bound, a sulfur atom or a -CHR<Sup>6</Sup> group (R<Sup>6</Sup> denotes a hydrogen atom, an alkyl group or a cycloalkyl group); A denotes an alkylene group or a *-COR<Sup>7</Sup> group (R<Sup>7</Sup> 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).</p> |
