What is Allyloxypolyethyleneglycol CAS 27274-31-3?
Ethylene glycol monoallyl ether, as an important substance in the field of chemistry, presents a unique form of a colorless and transparent liquid. When observed carefully, it can be found that it is as crystal clear as pure water, without the slightest interference of impurities. Its transparent nature gives it unique advantages in various chemical reactions and application scenarios. When people get close and take a gentle sniff, they will notice that it gives off an extremely faint and special smell. This smell is not strong or pungent, but rather like some subtle scent in nature, faint and indistinct, which requires extra concentration to detect.
This substance has a very remarkable property, that is, it is very easily miscible with water. When ethylene glycol monoallyl ether is placed together with water, they can mix quickly and evenly, just like close companions reunited after a long separation, blending with each other without distinction between you and me. This characteristic enables it to play an important role in many chemical reactions and industrial applications involving water.
However, when ethylene glycol monoallyl ether is exposed to the air for a long time, it will quietly undergo a weak oxidation process. During this process, its molecular structure will gradually undergo some subtle changes, just like a person who, over a long period of time, undergoes the baptism of time and slowly alters their appearance.
From the perspective of molecular structure, due to the presence of two special chemical groups, hydroxyl and double bond, in the molecular formula of ethylene glycol monoallyl ether, it has become a brand-new environmentally friendly polymerization monomer and intermediate. The presence of hydroxyl groups endows it with a certain degree of hydrophilicity and reactivity, while the double bond is like a promising "chemical button", providing the possibility for it to participate in various polymerization reactions.
It is worth mentioning that ethylene glycol monoallyl ether has a relatively high boiling point and a relatively low odor. This feature makes it stand out among numerous application fields. For instance, in the process of synthesizing hydroxyl practical resins, it can serve as an ideal copolymer monomer to jointly construct resin materials with excellent performance with other substances. In the modification of silicone, it has transformed itself into an important intermediate, playing a key role in improving the performance of silicone.
Not only that, ethylene glycol monoallyl ether can also ingeniously alter the properties of allyl alcohol, enabling it to demonstrate superior performance in various applications. In actual industrial production and scientific research applications, its uses can be described as extensive and diverse. It is mainly used for the production of fluorocarbon resins, providing important raw material support for the synthesis of this high-performance resin. In the production of super absorbent resins, it also plays an indispensable role, helping to enhance the water absorption performance of the resins. It is one of the key components for the synthesis of unsaturated polyester, which can endow polyester with excellent physical and chemical properties.
In addition, ethylene glycol monoallyl ether also plays a significant role in fields such as UV-curing finishing agents, water-soluble coatings, paints, and plastic additives. It can serve as an important additive to enhance the performance and quality of products. In the preparation of polyurethane foam stabilizers, it can ensure the stability and uniformity of the foam. In the production of strong polymer electrolytes for batteries and chromium plating, it plays an even more crucial role, providing strong support for the development of related industries.
At present, there are mainly two artificial process flows for ethylene glycol monoallyl ether. Let's take a detailed look at them below.
The first one is the etherification end capping method. During this process, the hydroxyl group is mainly etherified with ethylene glycol by chloropropene under alkaline conditions. Specifically, when chloropropene is in an alkaline environment, it undergoes a chemical reaction with the hydroxyl group in ethylene glycol, just like two keys and locks that fit together precisely. However, this process is not smooth sailing. When distillation detoxification is carried out after the reaction is completed, a large amount of non-natural salts will be produced. These non-natural salts are like "by-products" in the production process, not only increasing the difficulty of subsequent treatment, but also possibly having certain impacts on the environment. Moreover, excessive propylene chlorine is difficult to be recycled in this process, which leads to a large waste of resources and also easily causes pollution to the surrounding environment.
Another method is the aggregation method. This method mainly involves ring-opening polymerization of propylene glycol and ethylene oxide under the action of an alkaline catalyst. During this process, propylene glycol and ethylene oxide are like a pair of well-coordinated partners, carrying out the reaction in an orderly manner under the command of the alkaline catalyst as the "director". They gradually form the target products through ring-opening polymerization. However, this method also has some problems, such as the easy generation of polyethylene glycol and allyl polyethylene glycol ether by-products with an ethylene oxide polymerization level greater than 1. The emergence of these by-products is like some minor episodes in a perfect performance. Although it won't affect the overall progress, it will to some extent influence the purity and quality of the products.
