Nanjing Chemical Material Corp.

  The fumigant market is classified into liquid, gaseous and solid. On the basis of type, the market is divided into metal potassium, 1,3 di-chloropropene, methyl bromide, metal sodium, chloropicrin, dazomet, methyl iodide , dimethyl disulfide, phosphine and other types. Depending on the application, the market is segmented into warehouse, crop based, soil, non crop based, vegetable field, cereal field and other applications.   Clearly, the farm industry needs a fumigant, but this chemical is not selective and would be more persistent in the environment than the more volatile methyl bromide, which admittedly needs to be replaced.   Methyl iodide  appears as a colorless liquid that turns brown on exposure to light. Denser than water. Contact may irritate skin, eyes and mucous membranes. Very toxic by ingestion, inhalation and skin absorption.   Methyl iodide is a member of the class of iodomethanes that is methane in which one of the hydrogens is replaced by iodine. It has a role as a f

  Polyether polyol  is abbreviated as polyether. It is an oligomer whose main chain contains ether bond (—R—O—R—) and the terminal group or side group contains more than 2 hydroxyl groups (—OH). It is prepared by addition polymerization of an initiator (a compound containing an active hydrogen group) with ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), etc. in the presence of a catalyst . The largest polyether producers are all common polyether polyols. Polyether polyols are produced with glycerol (glycerol) as the initiator and epoxide, by changing the PO and EO addition methods (mixed addition or separate addition), addition ratio, addition order and other conditions.   The main purpose 1. Detergent or defoamer L61, L64, F68 are used to prepare low-foam, high detergency synthetic detergent; L61 and L81 are used as defoamers in the papermaking or fermentation industry; F68 is used as an antifoaming agent in the blood circulation of artificial heart-lung machine to prev

  With its English name, Bronopol, it is also known as bromo-2-nitro-1. It is a white to light yellow and yellowish brown crystalline powder, and it is odorless, tasteless, soluble in water, ethanol, propylene glycol, insoluble in chloroform, acetone, benzene and so on. It will decompose slowly in alkaline aqueous solution and corrode some metals, such as aluminum. Bronopol is toxic, which is irritating to eyes, skin and mucous membrane. It can cause congenital abnormality and is harmful to environment.   Bronopol is mainly used as antiseptic and bactericide. It is added in the process of shampoo, balsam and cream. Its concentration in cosmetics is 0.01%-0.02%, and it can also be used in detergent, fabric treatment agent and so on.   As a cosmetic preservative, bronopol is an ideal preservative. It has a wide antibacterial spectrum, good antibacterial and bactericidal effects on Gram-positive, negative bacteria, fungi and actinomycetes, it also has low inhibitory concentration and fast

  Polyether polyol is prepared by ring-opening polymerization of epoxide monomers (such as ethylene oxide, propylene oxide and 1,2-epoxybutane) and a compound containing two or more active hydrogen atoms (called an initiator). In the presence of alkali catalyst, active hydrogen compounds initiate ring opening and oxide addition will continue until the required molecular weight is obtained. The number of hydroxyl groups in polyether polyol is determined by the number of unstable hydrogen atoms in the initiator. If the initiator has two active hydrogen, glycol will be formed. The reactivity of polyether polyol  to isocyanates depends on the initiator and the type of epoxy monomer that ends the ring-opening polymerization. The primary hydroxyl produced by polyol capped with ethylene oxide is more reactive than the secondary hydroxyl produced by propylene oxide, which is ideal for applications requiring rapid curing time. However, the use of initiator based on ethylene oxide and amine can

  Characteristics and advantages of China (3-Glycidoxypropyl)trimethoxysilane: 1. With epoxy function   A) Epoxy ring can react with many organic functional groups.   B) Epoxy functional groups will provide a non yellowing adhesion in many resin systems.   C) Compared with other tackifiers, it may improve the flexibility of the system.   2. With trimethoxysilane functional group   A) Bonding to inorganic substrates provides excellent dry and wet adhesion.   B) Hydrolysis is faster.     Potential applications of China (3-Glycidoxypropyl) trimethoxysilane : 1) It is used to improve the surface of organic materials and inorganic materials, such as the silicon implants of fiberglass in FRP, rubber, paint, coating.   2) It is used for adhesives to enhance adhesion. Suitable resins include epoxy, phenolic, melamine, polysulfide, polyurethane, polystyrene, etc.   3) It improves the adhesion between inorganic filler, base material and resin, so as to improve the mechanical strength and electri

  A wetting agent is a substance that reduces the surface tension of water, it spreads water on the surface and increases the ability of liquid dispersion. Reducing the surface tension will reduce the energy required to distribute the droplets onto the film, thereby weakening the cohesion of the liquid and enhancing its adhesion. An example of how wetting agents work is the formation of micelles. The micelle consists of a hydrophilic head, which forms an outer layer around the lipophilic tail. When it is in water, the tail of the micelle can surround the oil drop and draw its head into the water.   Dishwashing soap is a good example of a wetting agent. For all food oils and the cohesion on the board, it is difficult for water to disperse and clean the board. Soap dissolves all these unwanted particles, showing us a clean surface. Soap can also reduce the surface tension of water and make it evenly distributed on the whole surface.   There are four types of wetting agents: anionic wetti