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.

Poly butylene adipate-co-terephthalate is a well-known aliphatic-aromatic biodegradable random copolyester structurally composed of the chemical units butylene adipate. PBAT can be synthesized by polycondensation reactions in the melt phase. However, the synthesis process is very complex as PBAT requires high esterification temperatures.

Tetrahydrofuran is a colorless and transparent liquid with an ether-like odor. THF can be miscible with water. Azeotropic mixtures with water can dissolve alkaloids such as cellulose acetate and caffeine, and the dissolution performance is better than that of tetrahydrofuran alone. General organic solvents such as ethanol, ether, aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, etc. can be well dissolved in tetrahydrofuran. Oxidation in air easily produces explosive peroxides. THF has no corrosive effect on metals and has an erosive effect on many plastics and rubbers.

N-Methylpyrrolidone is an organic substance with the chemical formula C5H9NO, a colorless to light yellow transparent, miscible with any proportion of water, soluble in various organic solvents, such as ether, halogenated hydrocarbons, aromatic hydrocarbons, etc., and almost completely mixed with all solvents.

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.

  1.4-Butanediol (Butane-1.4-diol) is an organic substance with molecular formula C4H10O2 and molecular weight 90.12. Appearance is colorless or light yellow oily liquid. Flammable, freezing point 20.1℃, refractive index 1.4461. soluble in methanol, ethanol, acetone, slightly soluble in ether. BDO is hygroscopic and has a bitter taste, but slightly sweet in the mouth. Used as solvent and humidifier, also used as plasticizer, drug, polyester resin, polyurethane resin, etc.

Poly butylene adipate-co-terephthalate (PBAT) is a biodegradable polymer synthesized from petrochemical resources. PBAT has a very high elongation at break, which makes PBAT one of the most promising alternatives to LDPE packaging films. However, the applicability of PBAT films is still limited by low strength. In this work, we used polyethylene glycol 600 (PEG-600) as a coating agent to modify the surface of calcium carbonate. A series of PBAT/CaCO3 composite films with different CaCO3 particle sizes. The effects of particle size and capping agent content of CaCO3 filler on the mechanical.

Tetrahydrofuran is a colorless and transparent liquid with an ether-like odor. THF can be miscible with water. Miscible with water can dissolve alkaloids such as cellulose acetate and caffeine, and the dissolution performance is better than that of tetrahydrofuran alone. General organic solvents such as ethanol, ether, aliphatic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, etc. can be well dissolved in tetrahydrofuran. Oxidation in air easily produces explosive peroxides. THF has no corrosive effect on metals and has an erosive effect on many plastics and rubbers. Because of its low boiling and flash points, Tetrahydrofuran is prone to fire at room temperature. When stored, oxygen in the air can produce explosive peroxides with tetrahydrofuran. Peroxides form more easily in the presence of light and in the absence of water. Therefore, reducing substances such as 0.05%~1% hydroquinone, resorcinol, p-cresol or ferrous salts are often added as antioxidants to inhibit th