Poly(butylene terephthalate)
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
- Mol File:
- 26062-94-2.mol
Poly(butylene terephthalate) Chemical Properties
- Melting point:
- 226 °C
- Density
- 1.31 g/mL at 25 °C(lit.)
- storage temp.
- -70°C
- form
- pellets
- CAS DataBase Reference
- 26062-94-2
- EPA Substance Registry System
- Terephthalic acid 1,4-butanediol polymer (26062-94-2)
Safety Information
- WGK Germany
- 3
- Hazardous Substances Data
- 26062-94-2(Hazardous Substances Data)
MSDS
- Language:English Provider:SigmaAldrich
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.
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.
Poly(butylene terephthalate) Preparation Products And Raw materials
Preparation Products
Raw materials
Poly(butylene terephthalate)Supplier
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Poly(butylene terephthalate)(26062-94-2)Related Product Information
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- POLY(1,4-BUTYLENE TEREPHTHALATE)