Polybutylene Terephthalate（PBT） CAS#26062-94-2
Excellent Appearance and Surface Quality – PBT has a glossy surface and appears in milky white or pale yellow form, offering good aesthetic and processing quality.
High Crystallinity Thermoplastic Performance – As a crystalline thermoplastic polyester, PBT provides stable structure and reliable material performance.
Good Mechanical and Physical Properties – With a suitable molecular weight and density range, PBT delivers strong durability and stability for engineering applications.
Wide Industrial Application Range – PBT is widely used in electronics, automotive parts, machinery components, and optical fiber sheathing due to its balanced performance.
Products Description of Polybutylene Terephthalate (PBT)
Polybutylene terephthalate (PBT) is a crystalline thermoplastic polyester resin that can appear translucent or opaque. It is also known as tetramethyl terephthalate, with the chemical formula (C₁₂H₁₂O₄)ₙ and a relative molecular mass of 30,000–40,000.
It typically appears milky white or pale yellow, featuring a glossy surface and a density range of 1.31–1.55 g/cm³.
PBT is widely used across multiple industries, including electronics, automotive, machinery, and optical fiber sheathing applications.
| English Name | Poly(butylene terephthalate) |
| English Synonyms | terephthalicacid-1,4-butanediolpolymer;terephthalicacid-tetramethyleneglycolcopolymer;terephthalicacidtetramethyleneglycolpolymer;tetramethylenediol-terephthalicacidpolymer;tetramethyleneglycol-terephthal icacidpolymer;Thermocomp WC-1006;Ultradur B 2550;Ultradur B 4300 G10 |
| CAS Number | 26062-94-2 |
| Molecular Formula | C12H1606 |
| Molecular Weight | 256.25 |
| EINECS Number | 607-857-5 |
| Melting point | 226 ℃ |
| Density | 1.31 g/mL at 25 °C(lit.) |
| Storage conditions | -70℃ |
| Form | granular |
| Biological origin | human |
| Specific activity | 6-8nmol/min-mg |
| Cosmetic ingredient efficacy | Viscosity control Film-forming agent |
| InChI | InChI=1S/C8H604.C4H1002/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,1-4 H2 |
| InChIKey | PCVVBHUFWPHCAL-UHFFFAOYSA-N |
| SMILES | C(C1C=CC(C(=O)O)=CC=1)(=O)O.C(CO)CCO |
Product Application of Polybutylene Terephthalate (PBT)
Polybutylene terephthalate (PBT) resin is widely applied in the automotive, electronics, electrical, machinery, and instrumentation industries for structural component manufacturing.
It is used to produce filaments, films, and a variety of electronic and electrical components, including transformers, potentiometers, strip connectors, color picture tube sockets, and different types of switches. It is also applied in automotive parts, mechanical components, and fiber modification.
In addition, PBT is used to manufacture industrial parts for televisions, household appliances, instruments, and machinery, as well as for the production of filaments and films.
