_{PPSU 苏威 R-5900}

_PPSU

PPSU是一种无定形的热性塑料，具有高度透明性、高水解稳定性。制品可以经受重复的蒸汽消毒。

PPSU，学名：聚亚苯基砜树脂(Polyphenylene sulfone resins)PPSU聚亚苯基砜树脂是聚砜(Polysulfone)简称PSF系列的产品 。是新颖的热塑性工程塑料，指在分子主链中含有砜基及芳核的高分子化合物，非结晶性。

外文名

PPSU

学    名

聚亚苯基砜树脂

法规

在国际法规中，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最小重均分子质量为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]

PPSU 苏威 R-5900

PPSU 苏威 R-5900

PPSU 苏威 R-5900