welinkschem

Polytetrahydrofuran is a white waxy solid that is readily soluble in alcohols, esters, ketones, aromatics and chlorinated hydrocarbons, and insoluble in ester fatty hydrocarbons and water. PTMEG becomes a clear liquid when the temperature exceeds room temperature.

1.4-Butanediol is an important raw material for the production of spandex, plastics, elastomers and films. BDO is used as a base material as well as a starting material for other SA derivatives such as THF and GBL. THF is produced from 1,4-DO in the presence of phosphoric acid under high temperature conditions. Figure 5 shows five known chemical processes for producing 1,4-PDO. Reppe chemistry was one of the first technologies to produce 1,4-butanediol from acetylene and formaldehyde.

Poly Butylene Adipate-Co-Terephthalate is a semi-crystalline polymer with a crystallization temperature of approximately 110°C and a melting point of approximately 130°C. PBAT has a density of 1.18 g/ml to 1.3 g/ml. PBAT has a crystallinity of approximately 30% and a Shore hardness of over 85. The processing performance of PBAT is very similar to LDPE and can be blown on LDPE processing equipment. PBAT can be blown on LDPE processing equipment.

Tetrahydrofuran (THF) is a colorless, volatile liquid with the odor of ether or acetone and is miscible with water. THF is highly flammable and may thermally decompose to carbon monoxide and carbon dioxide. Long-term storage in contact with air and without antioxidants may cause THF to decompose into explosive peroxides.

NMP is a high boiling point liquid with very high solubility for H2S. N-Methylpyrrolidone is particularly suitable for purification of high pressure, high CO2 content synthesis gases in gasification applications. NMP is a solvent that evaporates very slowly. 1-methyl-2-pyrrolidone has a boiling point of 202°C. NMP takes over 15,000 seconds for a layer of NMP film to evaporate 90% at room temperature. If this is the only solvent used in a PAI or PES based coating, the viscosity will not increase rapidly after application and the coating will tend to run, drip and sag. The most effective fast evaporating solvent for these resins is DMF, but this solvent has serious safety concerns.

Polytetrahydrofuran (PTMEG), also known as polytetramethylene ether glycol , is a white waxy solid easily soluble in alcohols, esters, ketones, aromatic hydrocarbons and chlorinated hydrocarbons, insoluble in ester fatty acids and water.

1.4-Butanediol has a wide range of applications. 1.4-butanediol is used as a chain extender and polyester raw material for the production of polyurethane elastomers; esters made from 1,4-butanediol are good plasticizers for cellulose, polyvinyl chloride, polyacrylates and polyesters 1.4-Butanediol has good hygroscopic elasticity. BDO can also prepare N-methylpyrrolidone, N-vinylpyrrolidone and other pyrrolidone derivatives, and can also be used in the preparation of vitamin B6, pesticides, herbicides and various process solvents, lubricants, humidifiers, softeners, adhesives and the role of brightening agents, solvents, wetting agents and plasticizers in the electroplating industry. Cross-linking agent, organic synthesis for manufacturing polyurethane with high elasticity. BDO can prepare pyrrolidone derivatives such as N-methylpyrrolidone, N-vinylpyrrolidone, etc. BDO is also used in the preparation of vitamin B6, pesticides and herbicides.