PTMEG polytetramethylene ether

As can be seen, most of the furfural produced in this country is consumed as an intermediate for other chemicals. Hydrogenation to furfuryl alcohol is the largest use. Some of the furfuryl alcohol is further hydrogenated to produce tetrahydrofurfuryl alcohol. The next major product is furan, produced by decarbonylation. Furan is a chemical intermediate, most of it is hydrogenated to tetrahydrofuran, which in turn is polymerized to produce polytetramethylene ether glycol (PTMEG). 

Butanediol [110-63-4] (BDO) goes primarily into tetrahydrofuran [109-99-9] (THE) for production of polytetramethylene ether glycol (PTMEG), used ia the manufacture of polyurethane fibers, eg, Du Font s Spandex. THE is also used as a solvent for PVC and ia the production of pharmaceuticals (qv). Lesser amounts of BDO are employed ia the production of polybutylene terephthalate resias and y-butyrolactone. 

Figure 1 shows the proton noise-decoupled C-NMR spectrum of a polytetrahydrofurein (polytetramethylene ether glycol, PTMEG) dissolved in THF. In this spectrum the carbons numbered 1, 2 and 3 which cure a to the oxygen appear at lower field them the 6-carbons labeled as 4, 5 and 6. The carbon atoms in the polymer are clearly resolved from the corresponding carbons of the THF monomer. The fact that carbons 3 and 4 near the hydroxyl end-groups can be easily identified shows the excellent resolution of this technique. 

Butanediol (BDO) goes primarily into tetrahydrofuran (THF) for production of polytetramethylene ether glycol (PTMEG), used in the manufacture of polyurethane fibers. 

Polyether polyols are usually produced by the polymerisation of ethylene or propylene oxide in the presence of a polyfunctional alcohol or amine as an initiator. Copolymers are also produced from mixtures of ethylene oxide and propylene oxide with di and tri -OH functionality. Polytetramethylene ether glycols (PTMEG) from tetrahydrofurans are also found. 

In general, the PTHF is needed in the diol form (with OH end groups). This form is called PTMEG which stands for polytetramethylene ether glycol. It is also known as POLYMEG (a trade name of QUAKER OATS). Conversion of the diacetate form to the diol form can be carried out as follows ... 

Another method of producing polyether polyols is the ring-opening polymerization of cyclic ethers, such as tetrahydrofuran, to produce polytetramethylene ether glycols or poly(oxytetramethylene) glycols, (PTMEG), as shown below. 

Alcoholysis diacetate ester of polytetramefhylene ether + alkanol = polytetramethylene ether glycol (PTMEG) + alkanol acetate ester alkali metal oxide or alkaline earth metal oxide in the presence of hot methanol PTMEG is used to make polyesters, polyurethanes etc. complete conversion of diester. [86]... 

PTMEG diamine. See Polytetramethylene ether glycol diamine... 

Polytetramethylene ether glycol diamine Synonyms PTMEG diamine Classification Oligomeric diamine Uses Curative for elastomers coatings, adhesives, sealants, and spray systems epoxy flexibilizer... 

Reroylglutamic acid Reroylmonoglutamic acid. See Folic acid PTFE (INCI) PTFE-20. See Polytetrafluoroethylene PTG. See Phenylthioglycolic acid PTMEG. See Polytetramethylene ether glycol PTMEG diamine. See Polytetramethylene ether glycol diamine... 

Terathane polytetramethylene ether glycol (PTMEG) is the feedstock for the... 

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