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  • Multifunction should be the common development direction of flame retardant

    2019-11-18 08:48:51
    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.
  • A fire-retardant process requires constant water addition to the fire-retardant pool

    2019-11-15 10:47:42
    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.
  • What are the precautions for amino polyether in storage?

    2019-11-13 17:23:14
    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.
  • There are many ways to classify different types of surfactants

    2019-11-11 09:48:52
    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:   
  • Did you know that sealant has better elasticity

    2019-11-08 10:16:26
    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.
  • Did you know that silicone structural sealant has more advantages than solid gasket

    2019-11-06 10:09:55
    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,
  • Environmental flame retardants play three main roles in fire

    2019-11-04 21:28:12
    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.
  • Discussion on the oily nature of organophosphorus phosphorus flame retardants

    2019-11-01 16:51:24
    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.
  • It is believed that the development of new generation halogen-free flame retardant will ensure the use of flame retardant materials.

    2019-10-30 16:49:16
    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?
  • Surfactant is suitable for chemical flooding.

    2019-10-28 16:28:56
    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:          
  • Desorption efficiency of surfactants in soil

    2019-10-25 09:02:56
    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
  • How to deal with the sanding of polyether amine ground?

    2019-10-23 22:01:33
    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?
  • Surfactants of quaternary ammonium disinfectants commonly used in China

    2019-10-21 09:56:18
    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.
  • Heavy oil scale cleaning agent is mainly composed of compound surfactant

    2019-10-18 10:02:26
    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 ℃.
  • Design and development of mild surfactants for human body

    2019-10-16 09:59:44
    With the increasing awareness of environmental protection, more and more attention has been paid to the environmental safety of surfactants, such as the discussion on whether surfactants cause harm to environmental safety, the ecology and toxicity assessment of surfactants, etc. At the same time, many people worry that with a wide variety of daily chemical products becoming people's daily necessities, such as toothpaste, soap, tableware detergent, washing powder (agent) and all kinds of cosmetics, everyone will take a certain amount of surfactants more or less every day. Therefore, there is a growing call for the research and development of environmental friendly, non-toxic and biodegradable surfactants.
  • Most flame retardants achieve their flame retardant purposes through the interaction of several mechanisms.

    2019-10-14 11:42:18
    Flame retardants play their flame retardant role through several mechanisms, such as endothermic effect, covering effect, chain reaction inhibition, asphyxiation of non-combustible gases and so on. Most flame retardants achieve their flame retardant purposes through the interaction of several mechanisms.
  • Trace colour powder has little effect on flame retardant effect of flame retardant.

    2019-10-12 10:23:47
    The powder design of the flame retardant effectively ensures the content of the flame retardant and reduces the application cost. However, the mixing of powder and plastic particles may be inhomogeneous due to mechanical reasons, but the amount of flame retardant is very low, only about 4%. So the method of adding PS particles and flame retardant for several minutes, then adding talcum powder, color powder and other fillers and stirring for several minutes depends on the larger specific surface area of PS particles to distribute flame retardant evenly. If the dispersion effect is still not ideal, the method of adding mineral oils such as white oil and mechanical oil can be used to wet the surface of PS particles in the mixer first, then add flame retardant to mix for several minutes, and then add additives such as toner and talc powder to mix and disperse.
  • Synergistic System of Halogenated Flame Retardants and Antimony Oxide

    2019-10-10 17:25:26
    The additive flame retardants commonly used in some materials may decompose slightly at the processing temperature, which limits the use of some flame retardants on the one hand and the processing temperature of flame retardants on the other. Many additive flame retardants are filler type. In order to make the material reach the required flame retardant level, the amount of additive is often large, so it is difficult to disperse all additive flame retardants evenly in the polymer matrix, which may reduce some properties of the material.
  • Nonionic surfactant with polyoxyvinyl group as hydrophilic group

    2019-10-08 17:20:43
    Non-ionic surfactants have excellent electrolyte resistance, hard water resistance, and good compatibility with other types of surfactants. They have been widely used to improve the stability of dispersion systems. At present, carbon black is mainly used in non-aqueous systems, such as inks and oily coatings. As the world increasingly sees and protects the environment, more and more studies have focused on carbon black water dispersions.
  • Molecular morphology and molecular weight affect the properties of surfactants

    2019-09-29 08:38:33
    The structure of surfactant is composed of hydrophilic group and hydrophilic group. The hydrophilicity and hydrophilicity of molecule, the morphology and molecular weight of molecule affect the properties of surfactant.
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