Introduction：Basic information about Poly(butylene terephthalate) CAS 26062-94-2, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
Poly(butylene terephthalate) Basic information
| Product Name: | Poly(butylene terephthalate) |
| Synonyms: | terephthalicacid-1,4-butanediolpolymer;terephthalicacid-tetramethyleneglycolcopolymer;terephthalicacid-tetramethyleneglycolpolymer;tetramethylenediol-terephthalicacidpolymer;tetramethyleneglycol-terephthalicacidpolymer;Thermocomp WC-1006;Ultradur B 2550;Ultradur B 4300 G10 |
| CAS: | 26062-94-2 |
| MF: | C12H16O6 |
| MW: | 256.25 |
| EINECS: | 607-857-5 |
| Product Categories: | |
| Mol File: | 26062-94-2.mol |
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Poly(butylene terephthalate) Chemical Properties
| Melting point | 226 °C |
| density | 1.31 g/mL at 25 °C(lit.) |
| storage temp. | -70°C |
| form | pellets |
| biological source | human |
| Specific Activity | 6-8nmol/min·mg |
| Cosmetics Ingredients Functions | VISCOSITY CONTROLLING
FILM FORMING |
| InChI | InChI=1S/C8H6O4.C4H10O2/c9-7(10)5-1-2-6(4-3-5)8(11)12;5-3-1-2-4-6/h1-4H,(H,9,10)(H,11,12);5-6H,1-4H2 |
| InChIKey | PCVVBHUFWPHCAL-UHFFFAOYSA-N |
| SMILES | C(C1C=CC(C(=O)O)=CC=1)(=O)O.C(CO)CCO |
| CAS DataBase Reference | 26062-94-2 |
| EPA Substance Registry System | Terephthalic acid 1,4-butanediol polymer (26062-94-2) |
Safety Information
| WGK Germany | 3 |
| TSCA | TSCA listed |
| Storage Class | 11 - Combustible Solids |
| Hazardous Substances Data | 26062-94-2(Hazardous Substances Data) |
Poly(butylene terephthalate) Usage And Synthesis
| Description | Polybutylene terphthalate (PBT; Poly(butylene terephthalate)) is a semicrystalline thermoplastic polyester considered as a medium performance engineering polymer. It is produced industrially in a two-step batch or continuous process. The first step involves the transesterification of dimethyl terephthalate (DMT) with 1,4-butanediol (BDO) to produce hydrobutyl terephtlate (bis-HBT) at a temperature of 200°C. The second step consists to the polycondensation of bis-HBT at 250°C to yield PBT. It exhibits both excellent electrical properties and chemical resistance. When reinforced with glass fibers, it has improved stiffness and mechanical strength. Typical uses include connectors, capacitors and cable enclosures. PBT is also used in hot appliances such as iron and kettles.
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| Chemical Properties | Poly(butylene terephthalate) is prepared in a condensation reaction between dimethyl terephthalate and 1,4-butanediol and its repeating unit has the general structure:
This thermoplastic shows good tensile strength, toughness, low water absorption, and good frictional properties, plus good chemical resistance and electrical properties. |
| Synthesis | PBT preparation methods are: dimethyl terephthalate and 1,4-butanediol as raw materials for the ester-exchange method; high purity terephthalic acid and 1,4-butanediol as raw materials for the direct esterification method. The former is generally used in the industry, firstly, the ester exchange reaction is carried out in the ester exchange reactor at atmospheric pressure and 160-190??, and then the polycondensation reaction is carried out at pressurized and elevated temperature. The continuous method process can be used to produce low, medium and high products with different viscosities. |
Poly(butylene terephthalate) Preparation Products And Raw materials
| Raw materials | Diantimony trioxide-->1,4-Butanediol-->Terephthalic acid-->Fiber Glass Wool-->Metatitanic acid-->Decabromodiphenyl oxide-->Polyolefine-->ACETYL-COA: ORTHOPHOSPHATE ACETYLTRANSFERASE |
| Preparation Products | Diantimony trioxide-->Fiber Glass Wool-->Decabromodiphenyl oxide-->Polyolefine |
