The plastic raw material is a polymer, which is also called polymer or polymolecular, also commonly known as plastic or resin. The so-called plastic, it is in fact a kind of synthetic resin, the shape with the natural resin of pine resin in the similar, but has the power to synthesize chemically.So it is called plastic.
This polymer is a combination of many small, simple structures that are covalently bonded. There are many types of polymers, and generally they can be classified into two types according changes in heat.More
According to the regulations of the Food Sanitation Law of China (1995), Food additive means any synthetic compound or natural substance put into food to improve its quality, colour, fragrance or taste, or for the sake of preservation or processing.
At present, there are 23 categories of food additives in China, more than 2,000 varieties, including acidity regulators, anti-caking agents, anti-foaming agents, antioxidants, bleaching agents, leavening agents, coloring agents, color-protecting agents, enzymes, flavours, Nutritional enhancers, preservatives, sweeteners, thickeners, spices, etc.
Feed additive refers to a little amount or a small amount of substance added during the production, processing and use of feed. The amount used in the feed is small but the effect is significant. Feed additives are inevitable raw materials used in the modern feed industry. They have obvious effects on strengthening the nutritional value of basic feeds, improving animal production performance, ensuring animal health, saving feed costs, and improving animal product quality.More
Paint, the oil paint we called as usual is one kind of them. It refers to a type of liquid or solid material applied to the surface of an object to form a film under certain conditions to protect, decorate or other special functions (insulation, rust prevention, mildew resistance, heat resistance, etc.). Because early paints mostly use vegetable oil as the main raw material, they are also called paints. Now synthetic resins have replaced vegetable oils, so they are called coating. Coating are not liquid, existing as powder type in most..
The coating is an organic chemical polymer material, and the formed paint film belongs to a structure of the polymer type. According to the classification of modern chemical products, coating is fine chemical product. Modern coating is gradually becoming to a kind of versatile engineering materials and as an important part in the chemical industry.
There are four main functions: protection, decoration, disguise of product defects and other special effects, enhance product value.
Since the founding of P.R.C.(People's Republic of China) sixty years ago, accompanying with the development of various industries in the national economy, the relevant coating industry has gradually developed from an extremely unobtrusive small industry into an important industry in all fields of the national economy. After several generations of hard work and forge ahead, China has become the second largest coating producer and consumer in the world, and has entered the mainstream of the world's coating industry.
Perfume, also known as fragrant raw material, is a substance that can be smelled or tasted. It is a raw material used in the flavor. Most spices cannot be used alone, except for a few varieties. The perfume is divided into a natural perfume and artificial perfume. Among them, the natural perfume includes animal and plant ones; the artificial perfume includes separated perfume and a synthetic fragrance.
Inorganic chemical is called inorganic chemical industry for short. It uses natural resources and industrial by-products as raw materials to produce chemical products such as sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid and other inorganic acids, soda ash, caustic soda, synthetic ammonia, fertilizer and inorganic salts, including sulfuric acid industry, soda ash industry, chlor-alkali industry, synthetic ammonia industry, fertilizer industry and inorganic salt industry. In a broad sense，it also contains the inorganic non-metallic materials and fine inorganic chemicals production such as ceramics, inorganic pigments. The main raw materials of inorganic chemical products are minerals such as sulfur, sodium, phosphorus, potassium and calcium, as well as coal, oil, natural gas, air and water.
The main raw materials of inorganic chemical products are minerals such as sulfur, sodium, phosphorus, potassium and calcium (see inorganic salt industry), as well as coal, oil, natural gas, air and water. In addition, the byproducts in many industries and wastes are also raw materials for inorganic chemicals, such as coke oven gas in the coking production process in the steel industry. The ammonia contained in the steel industry can be recovered by sulfuric acid to make ammonium sulfate, chalcopyrite and galena. Sulfur dioxide in the smelting waste gas of mines and sphalerites can be used to produce sulfuric acid, etc.
Organic chemistry, also known as carbon compound chemistry, studying of the composition, structure, properties, preparation methods and applications of organic compounds, is a very important branch of chemistry. Carbon substances are called organic compounds, because the former chemists believed that carbon substances must be made by organisms; however, in 1828, German chemist Friedrich Weiler was successfully synthesized urea (a kind of biomolecule)in the laboratory for the first time. Henceforth, organic chemistry has deviated from the scope defined by the tradition and expanded into the carbonaceous chemistry.