丙二醇

Propylene glycol monoether acetate was synthesized using heteropoly acid as catalyst for the firsttime.

首次以杂多为催化剂采用酯化法合成丙单乙醚乙酯。

Benzalacetone 1,2-propylene glycol ketal was synthesized from benzalacetone and 1,2-propylene glycol in the presence of ptoluene sulphonic acid.

以对甲苯磺为催化剂,通过苄叉丙酮与-1,2-丙反应合成了苄叉丙酮-1,2-丙酮。

Water, Cetyl Alcohol, Propylene Glycol, Sodium Lauryl Sulfate, Stearyl Alcohol, Methylparaben, Propylparaben, Butylparaben.

水，十六，丙，十烷基硫，脂， Methylparaben ， Propylparaben ， Butylparaben 。

Water (Aqua), Glycerin, Propylene Glycol, Hydroxyethylcellulose, Tetrasodium EDTA, Citric Acid, Sodium Benzoate.

水（水） ，甘油，丙，羟乙基纤维素， Tetrasodium乙胺四乙，柠檬，苯甲。

The changes of intrinsic viscosity and end carboxyl group content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP.

研究了聚对苯甲丙酯(PTT),PET,CDP在不同温度和时间下的特性粘数和端羧基含量的变化。

This paper introduces the preparing method, the structure, the properties and applications of poly (trimethylene terephthalate) (PTT), and it compared with PET, PBT et al. engineering plastics.

本文介绍了聚对苯甲丙酯(PTT)的制法、结构、性能及应用,并和PET、PBT等工程塑料进行了比较。