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

首杂多为催化剂采用酯化法成丙二醇单醚酯。

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

对甲苯磺为催化剂,通过苄叉丙酮与-1,2-丙二醇反应成了苄叉丙酮-1,2-丙二醇缩酮。

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

水，十六醇，丙二醇，十二烷基硫钠，硬脂醇， Methylparaben ， Propylparaben ， Butylparaben 。

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

水（水） ，甘油，丙二醇，羟基纤维素， Tetrasodium二胺四，檬，苯甲钠。

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

研究了聚对苯二甲丙二醇酯(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.

本文介绍了聚对苯二甲丙二醇酯(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。