PPSU的法规

在国际法规中，美国对该产品的核心提示：聚亚苯基砜树脂由对聚苯硫与过乙酸反应制得的基本树脂组成。用于制备聚亚苯基砜的对聚苯硫是由硫化钠和对二氯苯反应制得。本聚亚苯基砜树脂的小重均分子质量为5000道尔顿。添加的辅料为170至189各部分中规定允许使用的物质，一般公认为在食品中是安全的物质，在已公布的法规和规定文件中允许使用的物质。该聚合物的玻璃化温度为（360±5）℃。

原文如下：

§177.2500 Polyphenylene sulfone resins

The polyphenylene sulfone resins （CAS Reg. No. 31833-61-1） identified in paragraph （a） of this section may be safely used as articles or components of articles intended for repeated use in contact with food, subject to the provisions of this section.

（a） Identity. For the purpose of this section, polyphenylene sulfone resins consist of basic resin produced by reacting polyphenylene sulfide with peracetic acid such that the finished resins meet the specifications set forth in paragraph （c） of this section. The polyphenylene sulfide used to manufacture polyphenylene sulfone is prepared by the reaction of sodium sulfide and p -dichlorobenzene, and has a minimum weight average molecular weight of 5,000 Daltons.

（b） Optional adjuvant substances. The basic polyphenylene sulfone resins identified in paragraph （a） of this section may contain optional adjuvant substances required in the production of such basic resins. These optional adjuvant substances may include substances permitted for such use by regulations in parts 170 through 189 of this chapter, substances generally recognized as safe in food, or substances used in accordance with a prior sanction or approval.

（c） Specifications. The glass transition temperature of the polymer is 360±5 °C as determined by the use of differential scanning calorimetry.

[65 FR 15058, Mar. 21, 2000]