Alkali content of concrete and alkali aggregate reaction Chizhou antifreeze price Huangshan early strength antifreeze manufacturer
The alkali content of concrete, when there are no additional sources, refers to the Na20 and K20 content in the cement component, while the alkali content of modern concrete is the alkali content of c…
Reaction of polyurethane isocyanate and hydroxyl group
The reaction product of isocyanate group and hydroxyl group is urethane. Studies have shown that the reaction between isocyanate and hydroxyl is a second-order reaction, and the reaction rate constant…
Reaction of polyurethane isocyanate with water
German chemist A.Wurtz believes that isocyanate reacts with water to first generate unstable carbamic acid, which is then decomposed into carbon dioxide and amines. In the presence of excess isocyanat…
Reaction of polyurethane isocyanate and amino groups
The reaction between amino groups (primary amino groups and secondary amino groups) and isocyanate is one of the more important reactions in the preparation of polyurethane. Isocyanates react with ami…
Self-polycondensation reaction of polyurethane isocyanate
——Carbodiimide Under organic phosphine catalyst and heating conditions, isocyanate can undergo self-condensation polymerization reaction. Compounds containing carbodiimino groups (—NCN—) are generated…
[Castor oil supply] Castor oil can directly participate in the reaction to prepare polyurethane coatings
Castor oil is a triglyceride of fatty acids. Castor oil is found in castor beans In the seeds, its content is 35% to 57.%. “Castor oil is obtained by squeezing or solvent extraction. It is almos…
[Triethanolamine supply and sales] Precautions for the chemical reaction of triethanolamine
Triethanolamine is a colorless, transparent and viscous liquid at room temperature, with a slight ammonia smell. It is hygroscopic and can absorb moisture and carbon dioxide in the air. Precautions fo…
[Triethanolamine Supply] About the solubility and chemical reaction of triethanolamine
Triethanolamine is a colorless, transparent and viscous liquid at room temperature, with a slight ammonia smell. It is hygroscopic and can absorb moisture and carbon dioxide in the air. Information ab…
[Octadecyl acrylate supply] Synthesis steps of octadecyl acrylate esterification reaction
There are many methods for synthesizing stearyl acrylate, among which the more commonly used methods are esterification reaction and hydromethylamination reaction. The following takes esterification r…
What will be the reaction when the concrete water-reducing agent meets the soil in the sand and gravel materials?
Water reducing agent is a new type of environmentally friendly water reducing agent. It is a hot topic in water reducing agent research at home and abroad. It is also considered to be the third breakt…
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