Polytetramethylene Ether Glycol Uses

Polytetramethylene ether glycol (PTMEG) is a homopolymer obtained by cationic ring-opening polymerization. PTMEG is a linear polyether glycol with primary hydroxyl groups. At room temperature, PTMEG is a white waxy solid. When the temperature exceeds room temperature, PTMEG is melted into a clear, colorless liquid. PTMEG is readily soluble in alcohols, esters, ketones, aromatic and chlorinated hydrocarbons and insoluble in aliphatic hydrocarbons and water.



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Povidone

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  Povidone Introduction: Povidone is a polymer material widely used in industry, medicine and chemical research. It is a high-molecular polymer composed of multiple monomer molecules with the same structure, that is, pyrrolidone (pyrrolidone) groups. The degree of polymerization is relatively high, generally hundreds to thousands. It has strong solubility and hygroscopicity, and it will decompose at room temperature, so certain precautions are required when preparing and using it. There are many preparation methods of povidone, the most common of which is the cyclization reaction of γ-butyrolactone and ammonia under alkali catalysis. After the reaction, it is treated with acid water to obtain povidone. The povidone prepared by the method has stable quality, high yield and wide application range. Applications: Povidone has many special chemical and physical properties. First, it has excellent solvent power and can dissolve many other polymer materials as well as some inorganic and ...
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What kinds of products may use NMP(N-methylpyrrolidone)? - 1,4-Butanediol | Polytetramethylene Ether Glycol | Gamma Butyrolactone | N-Methylpyrrolidone | Tetrahydrofuran | Poly Butylene Adipate-Co-Terephthalate | Welinks Petrochemicals and Relevant Chemicals Manufacturer and Supplier in China

What kinds of products may use NMP(N-methylpyrrolidone)? N-Methylpyrrolidone ( NMP ) harms the developing fetus when tested in pregnant animals. It is toxic to the reproductive system of male and female test animals. The reproductive effects of NMP( N-methylpyrrolidone ) have not been studied in humans. Based on the animal tests, you should treat NMP as a potential human reproductive hazard. Overexposure to NMP irritates the eyes, skin, nose, and throat. It can also affect the central nervous system or brain causing symptoms of drunkenness similar to the effects of drinking alcohol. NMP is easily absorbed through the skin. It is widely used to replace methylene chloride and other chlorinated solvents that harm the environment and health. HESIS revised this Health Hazard Advisory to inform workers and employers that Cal/OSHA has adopted a Permissible Exposure Limit for this substance. What kinds of products may use NMP(N-methylpyrrolidone)? Paint strippers Polyurethane paints Waterborne...
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