Physical and chemical properties of epoxy resin


Epoxy resins have a secondary hydroxyl group and an epoxy group, and the secondary hydroxyl group can react with isocyanate. Epoxy resin as a polyol is directly added into the component containing the hydroxyl group of polyurethane adhesive. In this method, only the hydroxyl group takes part in the reaction, while the epoxy group does not react.

Basic classification of epoxy resins


At present, the classification of epoxy resins has not been unified. Generally, they are classified according to strength, heat resistance grade and characteristics. There are 16 main varieties of epoxy resins. Including general adhesive, structural adhesive, high temperature resistant adhesive, low temperature resistant adhesive, water and wet surface adhesive, conductive adhesive, optical adhesive, spot welding adhesive, epoxy resin film, foam adhesive, strain adhesive, soft material bonding adhesive, sealant, special adhesive, latent curing adhesive, civil construction adhesive 16 kinds.

Application of polyester resin


When synthesizing polyester resin, if some other structures are introduced through chemical modification, polyester resin can have the original performance, to improve and highlight a certain performance, to achieve special application performance requirements, the use of epoxy, acrylic acid, silicone modified polyester resin.

Application of powder coatings


The largest growth areas of our powder coating market are: Marine industry and pipeline industry. The existing problem is that impact resistance and hygroscopicity need to be improved and improved. Researchers mainly focus on the modification of various base materials. There is still a gap between the domestic pipeline anticorrosive epoxy powder coating and the foreign products in the aspects of storage stability and coating construction. Due to the development of foreign automotive powder coating technology, automotive coating, wood and plastic coatings are the most dynamic potential markets. The automotive industry will be a major consumer, with good growth in the powder coating market in Greece, Turkey and Eastern Europe. The Asia Pacific region has greater potential and is already considered to be the fastest growing region in the world.

Precautions for industrial salt


Nitrite reducing strong, can make flesh color bright, part of life bad ignorant businesses with industrial salt curing meat products, resulting in mass nitrite poisoning, so "industrial salt" is usually used to refer to nitrite. Long-term ingestion of nitrite also increases the risk of cancer. Industrial salt is strictly prohibited.

The use of industrial salt


The main products in the basic chemical industry are hydrochloric acid, caustic soda, soda ash, ammonium chloride and chlorine gas, which are mainly produced with industrial salt as raw materials. In addition, it is also used in soap manufacturing, ceramics, glass production, daily chemical industry, petroleum drilling, drilling fluid, completion fluid, petrochemical dehydration fluid, construction industry early strength agent, production of coating coagulant, rubber industry latex coagulant, paper industry additives and waste paper deinking, chemical industry inorganic chemical raw materials and sulfate removal agent, Brown alginate sodium coagulant, control wheat, apple, cabbage and other decay and food preservatives, preparation of sodium metal and other sodium compounds, iron and steel heat treatment medium. Salt also has a wide range of uses in water treatment, highway snow removal, refrigeration and refrigeration. Before the industrial age, people referred to the salt, specifically the salt used in life, rather than the current chemical science "salt". However, in real life, a considerable number of people are not educated enough to distinguish the essential difference between "salt" in daily life and "salt" in chemistry, so that there are many cases of eating toxic salt by mistake and mass poisoning.

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