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Application of TRIS (CAS77-86-1) in the field of coatings
TRIS stands for tris-hydroxymethylaminomethane, CAS number is 77-86-1. As a common biological buffer, Tris buffer is not only widely used as a solvent for nucleic acids and proteins, but also one of the main components of protein electrophoresis buffer. In addition, Tris can also produce a variety of chemicals, pesticides, medicines and other products, which is an important intermediate for the preparation of surfactants, vulcanization accelerators and some drugs. The following mainly introduces the application of Tris in the field of coatings.
Bio-buffer product packaging
Tris mainly plays the following four roles in the coating preparation process: pH adjusting agent, crosslinking accelerator, polyester coating raw material and phase change core material.
- pH adjuster
Tris is a weak base. At 25 ℃, its pKa is 8.1; according to buffer theory, the effective buffer range of Tris buffer is between pH 7.0 and 9.2. The pH of the aqueous solution of Tris base is about 10.5. Generally, hydrochloric acid is added to adjust the pH value to the desired value, and the buffer solution with the pH value can be obtained.
2. Crosslinking accelerator
The cross-linking accelerator can act as a bridge between linear molecules, so that multiple linear molecules are bonded and cross-linked to form a network structure. It is a substance that promotes or regulates the formation of covalent or ionic bonds between polymer molecular chains. Polyols are often used as diplomatic agents in the preparation of coatings.
3. Raw material for polyester coating
Polyol, polyacid, catalyst and antioxidant react to produce polyester oligomer, which can be used as coating composition
4. Phase change core material
When the temperature reaches the phase transition temperature, the structure of the polyol phase change material will change from the layered core structure to the isotropic face center structure, at the same time, the hydrogen bond between the layers is broken, and the molecules change from the crystalline state. For an amorphous phase transition, the bond energy is released. The solid-solid phase change enthalpy of a polyol is relatively large, and its size is related to the number of hydroxyl groups contained in each molecule of the polyol. The more the number of hydroxyl groups contained in each molecule, the greater the solid-solid phase change enthalpy. Its advantages are large phase change enthalpy, stable performance and long service life. The disadvantage is that when their temperature reaches above the solid-solid phase transition temperature, it will change from a crystalline solid to a crystal with a large vapor pressure plasticity, which is easy to lose.
Tris (CAS77-86-1) is not only an important biological buffer, but also an important material for organic synthesis. Although the current application in the field of coatings is not very extensive, but with the development of science and technology and the in-depth research of Tris application by relevant researchers at home and abroad, I believe that trimethylol aminomethane will get more applications in this field in the future.
Desheng has 15 years of rich experience in R&D and production of biological buffers, blood collection tube additives, color reagents, and chemiluminescent reagents, and can provide high-quality Tris(CAS77-86-1) product raw materials. In addition to Tris, there are HEPES, CAPS, MOPS, and PIPES in the biological buffer series. Now the company is actively expanding into new fields, and can provide nucleic acid detection raw material virus preservation solution and no-clean gel raw material carbomer.