Unsaturated Resin refers to a polymer compound containing unsaturated double bonds produced by polycondensation reaction of dibasic acid and dibasic alcohol. The earliest resin discovered by human beings was a fat-like substance extracted from the secretions of trees, such as rosin, which is the reason for the "tree" before "grease".

Maleic anhydride, abbreviated as maleic anhydride, also known as "maleic anhydride", is the acid anhydride of maleic acid. It is a colorless or white solid with acidic smell at room temperature, molecular formula C4H2O3, molecular weight 98.06, obtained from chloroform or ethyl ether as needle-like crystals. Melting point 60 ℃, boiling point 82 ℃ (1.Chemicalbook8665kPa), relative density 1.31460. soluble in acetone, chloroform, ether, slightly soluble in petroleum ether. Dissolved in water to generate cis-butenedioic acid, dissolved in alcohol to form esters, and can contain conjugated double bond compounds for diene synthesis reaction. Toxic, strong irritation of mucous membrane.

Hydrogen peroxide chemical formula for H₂O₂, because there are two O, so commonly known as hydrogen peroxide. Appearance is colourless transparent liquid, is a strong oxidant, its aqueous solution is suitable for medical wound disinfection and environmental disinfection and food disinfection.

R-410A refrigerant, alias R410A, SUVA 9100, Genetron AZ-20, Genetron 410A, Puron 410A, etc. As R-410A is an HFC type near azeotropic refrigerant (completely free of ozone-depleting CFCs and HCFCs

Lithium hydroxide, is an inorganic compound, chemical formula for LiOH, is a white crystalline powder, soluble in water, slightly soluble in ethanol, has a strong alkaline, 1 mol / L solution of pH about 14, pKb = -0.04, is mainly used in the preparation of lithium salts and lithium-based lubricating grease, alkaline storage battery electrolyte, lithium bromide refrigeration machine absorption fluid.

difluoromethane is an organic compound, chemical formula CH2F2, colorless gas, commonly used as refrigerant, dry engraving agent.

Sodium hydroxide, also known as caustic soda and caustic soda, has a chemical formula of NaOH. It is a highly corrosive strong alkali, generally in the form of white flakes or granules, which can be miscible with water to form an alkaline solution, and can also be dissolved in methanol and ethanol. This alkaline substance is deliquescent and will absorb water vapor from Chemicalbook in the air, as well as acid gases such as carbon dioxide. Sodium hydroxide is one of the commonly used chemicals. It is widely used and is a necessity in many industrial processes: it is often used in the manufacture of wood pulp paper, textiles, soap and other cleaning agents, and it is also used in household alkaline drainage products.

Chloroacetic acid is packaged in a polypropylene woven bag lined with a double-layer plastic bag. During transportation, prevent direct sunlight, (rain, etc.) moisture, and damage to the package. It should be stored in a cool, ventilated and dry place, away from fire and heat sources, and should be stored separately from oxides, alkalis, flammables and other items. The shelf life is one year at room temperature, and it is not suitable for long-term storage in summer when the temperature is high.

Aluminum fluoride is a colorless tripartite crystal or white crystalline powder, soluble in water and hydrofluoric acid, insoluble in other solvents, and even concentrated sulfuric acid heating to smoke, still does not react. Anhydrous material is very stable and does not decompose when heated until sublimation.