Polyether amine technology is often used as a kind of foaming agent after polyether amine is generated. Of course, it is because of the existence of such products that we can achieve a good effect when using products. However, when we use it in styrofoam, what should we pay attention to? Let's have a simple understanding.

Oxygenation principle of surfactant: the saturated solubility of oxygen in aquaculture water can be increased by adding surfactant. According to hydrate formation theory and bimembrane theory, due to the low solubility of oxygen in water, water oxygenates in water generally form at the gas-liquid interface first, and then slowly diffuse from the gas phase to the liquid phase. Due to the solubilization of surfactants, a large amount of oxygen is dissolved in the surfactant micelles formed in the aqueous solution, so that the formation of water oxygenate in the surfactant aqueous solution can not only occur at the gas-liquid interface, but also in the water body, reducing the formation time of water oxygenate, and improving the oxygen in the water body Solubility in.

Surfactant is a kind of substance which can make the interface state of solution system change obviously. Surfactants have fixed hydrophilic and lipophilic groups, and can be arranged on the surface of the solution. The molecular structure of surfactant is amphiphilic, one end is hydrophilic group, the other end is hydrophobic group.

Generally, the toxicity of amino terminated polyether in oral cavity or in contact with skin, eyes and mucous membrane can be ignored, so there is no need for personal protective measures in use. But because its alkalinity can irritate skin and eyes, it is necessary to wear safety glasses, gloves and other protective articles during operation.

Surfactants are substances that can significantly reduce the surface tension and interfacial tension of liquids. Their molecules are composed of polar hydrophilic group and nonpolar hydrophobic group. The common hydrophilic group is carboxyl group, sulfuric acid ester, sulfonic acid group, amino group, quaternary ammonium group and hydroxyl group, while the hydrophobic group is represented by long-chain alkane and aromatic hydrocarbon. Because of their hydrophilic and lipophilic amphiphilic properties, they can change the surface properties of cleaning solution during chemical cleaning, making it have lower surface tension, better wettability and foaming. According to the different charge of the surface active part, surfactants can be divided into four categories: anionic, cationic, non-ionic and amphoteric.

With the passing of time and the development of science, our knowledge of polymer flooring maintenance materials has also been fundamentally changed. More and more users begin to pay attention to the function and useful concept of products. The new flooring no longer excessively seeks the needs of light, smoothness and endless hardness of polymer flooring, but also needs the appearance of light, soft and hard without cracking Pay attention to meet the functional needs of the owners.

In the process of flame-retardant, most manufacturers adopt the sequence of loading wood → adding flame retardant → adding water → starting flame-retardant. Generally speaking, when the water absorption of wood is the largest at the beginning, the process often causes the wood to start to absorb a very low concentration of flame-retardant liquid, so in the process of wood flame-retardant, a process is needed to make the concentration of flame-retardant liquid absorbed by wood excessive from low concentration to normal concentration, which directly affects the dry salt absorption and absorption speed of wood, and then affects the flame-retardant effect.

Some additive flame retardants commonly used in some materials may decompose a little under the processing temperature, which limits the use of some flame retardants on the one hand, and on the other hand limits the processing temperature used in flame retardant materials. A lot of additive flame retardants are filler type, but in order to make the materials reach the required flame retardant level, the amount of additive is often large, so it is difficult to disperse them uniformly in the polymer matrix, which may reduce some properties of the materials.

Precautions for amino terminated polyether in storage refer to: when the material barrel is placed vertically, there shall be no water on the barrel cover, and the material barrel shall be placed in a cool and dry place, away from the heat source, and shall not be exposed to the sun. If the whole barrel cannot be used up in one time, the end must be closed immediately after each use to prevent impurities, water vapor, etc. from entering the barrel and affecting the use. If more than two brands of amino terminated polyether are used at the same time, they shall be stacked in categories and marked with obvious marks. The storage time of amino terminated polyether added with ordinary flame retardant shall not be too long, and the white material prepared on the same day shall be used as much as possible on the same day, otherwise it is easy to deteriorate and affect the foaming quality.

At present, chemical flooding is the main method of tertiary oil recovery in China, and surfactant is suitable for chemical flooding. On the basis of practical work experience, many experts and scholars put forward requirements for surfactant flooding in oil fields, which are summarized as follows:   

The correct treatment method can use a sharp tool to wash the water seepage point wider, and then clean the one that needs to be glued until the wall is dry. After the wall is dry, it can be applied with neutral weather resistant adhesive, which should be a good solution to the problem of weak bonding caused by water leakage. It is also worth mentioning that we can't use acid glue for silicone sealant, because this kind of glue will cause corrosion to the expansion screw.

Silicone structural adhesive is a one-component polyurethane sealant, which is sealed with stone, glass, aluminum-plastic plate, ceramics, cement pipe, flange, oven, high-temperature mechanical seal, automobile, motorcycle and other high-temperature cylinder instead of the traditional gasket. The product is resistant to oil, sewage, antifreeze and automatic shift oil, with high temperature resistance of 350 ℃; it has excellent adhesive compatibility, high adhesive strength and good thixotropy , no solvent, excellent weather resistance, water resistance, oil resistance, low temperature resistance, aging resistance, no corrosion, no pollution, high strength, salt fog resistance, convenient construction, can be coated with a variety of coatings on the surface, overcoming the shortcomings of water resistance of acrylic sealant and oil resistance of polysiloxane, and can also be used for waterproof sealing of joints between various ceilings and walls, decoration, caulking,

The retarding effect of environmental flame retardant in large fire. As we all know, environmental flame retardant is a kind of flame retardant. Environmental flame retardant is a composite material based on resin and rubber. It is an additive that can prevent polymer materials from igniting or inhibiting flame propagation. Among them, the common environmental flame retardants are phosphorus, bromine, chlorine, antimony and aluminum compounds. Next, we will show you the role of environmental flame retardants in fire.

Organophosphorus phosphorus flame retardants are mostly oily. They are not easy to add in the process of polymer processing. It is commonly used in polyurethane foam, soft PVC, transformer oil, cellulose resin, natural rubber and synthetic rubber. So what is phosphorus flame retardant? What is its flame retardant principle? Let's get to know.

Flame retardants of different sizes and shapes gradually come into our lives and become a part of us. In the face of so many kinds of flame retardants, do you really choose the right one? For our health and our environment, we should choose safe environmental flame retardant. How to judge whether it is environmentally friendly?

At present, chemical flooding is the main method of tertiary oil recovery in China, and surfactant is suitable for chemical flooding. On the basis of practical work experience, many experts and scholars put forward requirements for surfactant flooding in oil fields, which are summarized as follows:          

Surfactant is a kind of material which can reduce the interfacial tension of liquid, solid-liquid and gas-liquid. It has the functions of solubilization, emulsification and wetting. It can dissolve those insoluble petroleum hydrocarbons and other organic compounds, so as to improve the desorption efficiency of organic pollutants in soil. The surface active molecules are amphiphilic, that is, the hydrophilic group composed of hydrophilic group and lipophilic group makes the surface active molecules soluble in water, while the lipophilic group makes the surface active molecules soluble in oil phase gasoline, kerosene, animal and vegetable oil, various fat channels, aromatic compounds and some liquid organics which are not soluble in water. Chinese style

Polyether amine can be used as a curing agent in concrete, so we should not only control its skills and methods, but also pay special attention to the relevant matters of operation. In the construction, if the operation is improper, it is easy to shorten the life of the ground, so in this process, if the ground is sanding, how to deal with it?

In recent years, a new double chain quaternary ammonium salt disinfectant with one hydrophilic group and two lipophilic groups has been developed, which has a better gelling speed and a stronger ability to reduce the surface tension, and can increase their water solubility. Even in the case of high water hardness, it also shows a good solubility and good stability. The results showed that the bactericidal effect of double chain quaternary ammonium salt disinfectant was superior to that of single long chain quaternary ammonium salt, with better decontamination ability, low temperature resistance and toxicity. There are three kinds of new products on the market in China: Baidusha, also known as didecyldimethylammonium bromide; Xinjieling disinfectant, also known as didecyldimethylethylenediammonium bromide; lierkang 1210 disinfectant, a compound disinfectant composed of didecyldimethylammonium chloride and N-alkyl (50% C14, 40% C12, 10% C16) dimethylbenzylammonium chloride.

In petroleum refining and petrochemical plants, the heavy oil and coke deposits in heat exchange equipment and pipelines are serious, which often need to be cleaned. The organic solvent is toxic, inflammable and explosive, while the general alkaline washing method is ineffective for heavy oil scale and coke scale. At present, the heavy oil scale cleaning agent developed at home and abroad is mainly composed of compound surfactants, which are composed of several non-ionic surfactants, anionic surfactants, inorganic detergent aids and alkaline substances. Composite surfactants not only produce wetting, penetration, emulsification, dispersion, solubilization and foaming effects, but also absorb FeS2. Generally, they need to be heated and cleaned above 80 ℃.