With the deepening recognition of medical materials used in medical devices industry, the unique special properties of liquid silicone rubber expand its application range. With these characteristics being more widely known, new applications and expanding markets are driving the application of liquid silicone rubber in medical devices more widely.

Thermosetting resin thermosetting resin includes epoxy resin, phenolic resin, polyurethane, unsaturated polyester resin, etc. This kind of resin needs multi-component blending when it is applied, so the flame retardant can be added at the same time and mixed evenly by rapid stirring. After mixing, the curing reaction is carried out at a certain temperature. After curing, a thermosetting resin material with flame retardancy can be formed.

Rotaru et al. Synthesized a new polyether polyol with high nitrogen content and good thermal stability by using Mannich, two ethanolamine, paraformaldehyde, cyanuric acid and propylene oxide. The PUF foam was prepared by Mannich polyol. The results show that because of the existence of isocyanide ring in the PU foam system, the PUF foaming by the Mannich polyol has better mechanical strength, and has better thermal stability and higher flame retardant efficiency than the traditional aliphatic PU foam system.

According to the relationship between the flame retardant and the flame retardant, the flame retardant can be divided into additive type and reactive type. The former is only physically dispersed in the substrate and is mostly used in thermoplastic polymers. The latter, as a monomer or auxiliary reagent, participates in the synthesis of polymers, and then becomes the structural unit of polymers, mostly used for thermosetting polymers.

Alkyl polyglucoside shampoo is a necessary daily chemical for people's daily life. It is an important personal cleaning product. It may even enter the eyes in the process of hair washing if it is in close contact with the skin. Therefore, it has a very high requirement for the mildness and safety. At present, most of the products on the market use sulfuric acid ester salt as foaming agent, silicone oil as smoothing agent and quaternary ammonium salt as germicide and dandruff remover. These three substances have certain irritation to the eyes. If they are inadvertently put into the eyes during the shampoo process, they will bring foreign body or tingling to the user, especially It is sensitive to mucous membrane. Dry and swollen eyes may appear after use, which seriously affects the feeling of use.

Alkyl polyglucoside is white powder, and the actual product is cream or light yellow, which has no obvious melting point. Soluble in water 'glycol' pyridine, insoluble in general organic solvents, the solubility in water decreases with the extension of alkane chain, and increases with the increase of degree of polymerization, so the solubility at room temperature is large, which has no effect on application. Water solubility is produced by the hydrogen bond formed by multiple hydroxyl groups on sugar, while the interaction of hydroxyl groups in water is very different from that of alcohol ether bond in water, So there is no cloud point and dilute gel as non-ionic surfactant.

This kind of application scope is mainly to use silicone structural adhesive as a kind of bonding data, to firmly bond the steel plate or profile used for reinforcement, or other reinforcement data (such as carbon fiber, aramid fiber, and chloro fiber) on various reinforced concrete components, such as beams, columns, nodes, bracket plates, tunnels and arch roofs, etc., and the completed reinforcement projects have achieved satisfactory results.

APG can reduce water activity and change the flow state of shale pore fluid, so it can be used as an inhibitor. It has good lubricity, inhibition ability, anti pollution ability and good reservoir protection. APG can interact with other water-soluble polymers to achieve the best filtration reduction effect. It can broaden the temperature limit of natural polymer drilling fluid, and it can be biodegradable, which is beneficial to environmental protection. In tertiary oil recovery, C12-C16 APG compound solution is used as the body replacement solution, which can obviously enhance the oil recovery compared with water drive.

APG has good wettability and permeability, is not sensitive to high concentration electrolyte, is biodegradable, does not pollute crops and land, and has excellent hygroscopicity Different from polyoxyethylene nonionic surfactant, it has no inverse phase cloud point, can effectively reduce the surface tension of the solution, delay the evaporation of water in the solution, and maintain the hydration and dissolution state of the pesticide for a long time, which is helpful to improve the absorption speed and absorption rate of the plant leaves facing the pesticide.

Compared with non-ionic surfactants, alkyl glycosides have the advantages of high critical micelle concentration, can be removed by dialysis, protein is not easy to denaturate, UV light penetration and so on. At the same time, APG can also be used to refine cytochrome c, RNA polymerase, rhodopsin, fatty acids, etc., to stabilize these proteins.

APG can improve the sizing effect of paper, and it can produce excellent flotation deinking agent with other surfactants. APG is also widely used in fire fighting agents.

However, due to the lack of chromophore group in alkyl glucoside molecule, UV detector can not be used, differential refractive detector can be used, but the sensitivity is not high and gradient elution is not possible. At present, the evaporative light scattering detector is widely used as a detection method for the analysis of alkyl glucosides, which has high sensitivity and gradient elution.

Anionic surfactants are mainly used in the form of sulfonates and phosphates. In the early stage, most of the antistatic agents were sulfonates. However, due to the limitations of the use of these surfactants in the oil agents, and their lubrication and antistatic properties were inferior to those of phosphates, the anionic surfactants in the modern oil agents were mainly phosphates, especially the alkyl phosphates and their salts (apk) and their ethylene oxide (EO) adducts Excellent antistatic agent and lubricant in oil agent.

Gemini surfactant is a kind of surfactants with special molecular structure. Its molecule is composed of the ionic head group of the two surfactants linked by the spacer through chemical bond. Because of its special structure, it has a special microstructure; it has a special use, can be used for the synthesis of mesoporous structure template, special chemical separation, etc.; for the Gemini surfactants which connect two different surfactant monomers on the head group, recent research shows that it has two kinds of surfactant properties.

Working principle: compressed air is sent into the rubber bottle (syringe), and the rubber is pressed into the feed pipe connected with the piston chamber. When the piston is in the up stroke, the piston chamber is filled with rubber. When the piston pushes the rubber dropping needle downward, the rubber is pressed out from the needle mouth. The amount of glue dripped is determined by the distance of piston down stroke, which can be adjusted manually or controlled in software.

Zhou Zhengmao, Secretary General of China flame retardant society, said that vecap is an environmental management plan to reduce the emission of pollution in the entire flame retardant supply chain, which has achieved significant emission reduction results in Europe and North America over the past few years. China flame retardant society plans to cooperate with BSEF to introduce vecap into China's flame retardant industry, encourage and guide Chinese flame retardant enterprises and their related downstream users to actively reduce the release of flame retardant to the environment in the process of production and use, and contribute to the sustainable development and competitiveness of the industry. Zhou Zhengmao also revealed that CFPA is in communication and consultation with relevant enterprises, and will organize relevant leaders and experts of the Ministry of environmental protection to visit the enterprise, and plans to launch specific implementation plans in the near future.

At the same time, surfactants bring great convenience to people's life, industrial and agricultural production, but also bring pollution to our environment. This is a worldwide problem, especially in our country, which should be paid more attention to.

It is generally believed that this is the main cause of fabric yellowing or color change of cloth, and the method of acylation and etherification of primary amino group is adopted to produce modified amino silicone oil or add antioxidant in order to reduce its yellowing or color change, but it is at the cost of sacrificing the hand feeling of finished fabric. In fact, the above methods can not completely eliminate the color change of finished fabric. As we know, when the dyed fabric is shaped at high temperature, the dye molecule activity intensifies, and some dyes that are not firmly bound will be separated from the fiber heat transfer or sublimation. If the dye is not blocked when it diffuses to the outer layer (including the fabric surface and air), the color after the fabric will mainly reflect the color light of the surface dye; if it is blocked (silicone oil film formation), the dyes that have heat transfer will Concentrated on the surface of the fabric.

Anionic surfactants have excellent performance in decontamination, but they are often combined with non-ionic surfactants to get better deinking effect. The anionic surfactants have good foaming and degreasing properties. The nonionic surfactants present nonionic state in aqueous solution and have high stability. When the non-ionic surfactant and the anionic surfactant are used together, the colloidal particles are negatively charged and repel with electricity, forming a stable dispersion system, which is conducive to the separation and removal of ink and fiber.

The compounding and Synergistic Technology of surfactants in our country is relatively backward, so we should strengthen the research on the basis and application technology in this field. The technology of multi-functional synergism, solubilization, emulsification, dispersion and anti caking should be paid more attention. Compounding technology is also the key to promote the application of special surfactants in leather making. The results show that the emulsification, dispersion and wettability of surfactants can be improved by adding 10-6 grade special surfactants.