Poly(butylene terephthalate)

Bezeichnung:Poly(butylene terephthalate)

CAS-Nr26062-94-2

Englisch Name:Poly(butylene terephthalate)

CBNumberCB0328216

SummenformelC12H16O6

Molgewicht256.25

MOL-Datei26062-94-2.mol

Poly(butylene terephthalate) physikalisch-chemischer Eigenschaften

Schmelzpunkt	226 °C
Dichte	1.31 g/mL at 25 °C(lit.)
storage temp.	-70°C
Aggregatzustand	pellets
Biologische Quelle	human
Specific Activity	6-8nmol/min·mg
Kosmetik-Inhaltsstoffe Funktionen	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 Datenbank	26062-94-2
EPA chemische Informationen	Terephthalic acid 1,4-butanediol polymer (26062-94-2)

Sicherheit

WGK Germany	3
TSCA	TSCA listed
Speicherklasse	11 - Combustible Solids
Giftige Stoffe Daten	26062-94-2(Hazardous Substances Data)

Poly(butylene terephthalate) Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung
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.
Chemische Eigenschaften
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.
Synthese

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) Upstream-Materialien And Downstream Produkte

Poly(butylene terephthalate) Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

26062-94-2, Poly(butylene terephthalate) Verwandte Suche:

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