PBT (Polybutylene terephthalate)

Polybutylene terephthalate (PBT) is a semi-crystalline thermoplastic material belonging to the polyester family. It's produced by the polymerization of butadiene and terephthalic acid. PBT differs chemically from PET in its number of -CH2 groups. The mechanical characteristics of the two materials are similar but slightly lower for PBT. Both materials are subject to hydrolytic degradation but PBT has a low moisture absorption. Unlike PET this material crystallizes quickly and without the need for nucleating agents. Furthermore, compared to PET, this material has a melting temperature of Tm (approx 224 ° C) and a lower glass transition temperature of Tg (22-43 ° C). The advantage of lower processing temperatures is off-set by lower heat distortion temperatures.
Chemical Formula PBT: (C12H12O4)n
CAS Number PBT: 24968-12-5
Chemical Name PBT (IUPAC): Poly(oxy-1,4-butanediyloxycarbonyl-1,4-phenylenecarbonyl)
Recycling Code PBT: number 7
Recycling Symbol PBT:
PBT Commercial names and producers
- Anjadur (almaak international)
- Arnite (DSM)
- Badadur (Bada)
- Bergadur (PolyOne / Bergmann)
- Celanex (Celanese)
- Crastin (DuPont)
- DIC PBT (Dai Nippon Japan)
- Duranex (Polyplastics)
- Enduran (Sabic)
- Gebadur (Geba)
- Infino (Samsung Lotte)
- Isodur (Sirmax)
- Lupox (LG Chemicals)
- Pibiter (So.F.Ter)
- Pocan (Lanxess)
- Polyshine (Polykemi)
- Raditer (Radici)
- Saxadur (Sax Polymers)
- Schuladur (Schulman)
- Staren (Samsung)
- Ultradur (BASF)
- Valox (Sabic)
- Vestodur (Evonik)
PBT European Distributors:
- BIGLER (Raditer, Radiflam B, Pibifor)
- XIFA (Valox, Xenoy)
- Schulman (Schuladur, QR Resin, Polyflam, Matrixx, Lucent PC, Ecollent, Diamaloy)
- Mega Polymers (Arnite, Celanex, Crastin, Kebater, Pocan, Radiflam, Ultradur, Valox, Vestodur)
- Tekuma (Infino)
- KD Feddersen (Precite, Celanex, Vandar)
- PolyOne (Crastin, Edgetecl, Gravi-tech, LubriOne, Trilliant)
- ALBIS (Alcom, Altech, Pocan, Ultradur, Makroblend )
- Biesterfield (Crastin)
- Nexeo (Colorfast, Electrafil, Enviroplas, HiFill, Colorcomp, Lubricomp, Thermocomp, Pocan, Ultradur, Valox)
- RESINEX (Arnite, Celanex)
- Ultrapolymers (Ultradur, Later, Latilub, Luvocom, Thermocomp, Valox, Colorcomp, Lubricomp, Stat-kon, Tribit)
- TER Plastics (Arnite T, CCP PBT, Terez PBT,)
Main compounds with PBT:
- PBT/PC (Blend Polybutylene terephthalate Polycarbonate)
- PBT/ASA (Blend Polybutylene terephthalate acrylic styrene acrylonitrile )
- PBT/PET (Blend Polybutylene terephthalate PolyethyleneTerephthalate)
- PBT-GF30 (Polybutylene terephthalate fibre glass 30%)
- PBT-GF15FR (PolibutilenTereftalato fibre glass 15% with flame retardant)
Chemical and physical properties:
It is a semi-crystalline material with excellent chemical resistance, mechanical rigidity, exceptional electrical properties (high dielectric strength and insulation resistance) and heat resistance, properties that remain stable in a wide range of environmental conditions.
Compared to Polyamide, PBT technopolymers have a greater specific weight, lower melting point, greater dimensional stability due to the low influence of humidity variations, and lower impact resistance.
PBT and PET are sensitive to aging via the action of UV rays and must be adequately shielded if used outdoors.
History of PBT
The preparation of the first polyester resin dates back to Berzelius, Gay-Lussac and Pelouze in 1847 and 1883 when its first application was for a surface coating. At that time the resin was known as alkyd (alcohol + acid). PBT officially debuted on the market more or less along with PET around 1970 and was presented as a plastic engineering material.
PBT standard density: 1,24 – 1,34 g/cm3 (ISO 1183)
PBT melting point Tm: 220 °C
PBT glass transition temperature Tg: 22 - 43 °C
PBT application markets
- Electrical appliances
- Electrical components
- Automotive
PBT transformation technologies
- Injection molding
- Extrusion
- Film
- Filaments
- Rotating molding
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PBT-GF30 First choice - Virgin | LUPOX GP2300 | granule/pellet | Natural / Neutral | 3000 Kg | bags on pallet | 4.00 €/Kg | |
PBT-GF30 First choice - Virgin | Deniter 3010 | granule/pellet | Light blue | 375 Kg | bags on pallet | 2.00 €/Kg | |
PBT-GF10 FR First choice - Slow moving | CRASTIN T841 FR BK851 | granule/pellet | Black | 2000 Kg | bags on pallet | 3.25 €/Kg | |
PBT FR First choice - Slow moving | CELANEX X680 | granule/pellet | Natural / Neutral | 250 Kg | bags on pallet | 1.00 €/Kg | |
PBT First choice - Virgin | LUPOX GP1000M | granule/pellet | Natural / Neutral | 3000 Kg | bags on pallet | 4.43 €/Kg | |
PBT Recycled SRM /Regrinded / Industrial By-Product / Industrial compound | Valox 312 | regrinded | Natural / Neutral | 10000 Kg | bigbag 1.000-1.100 kg | 1.80 €/Kg | |
PBT First choice - Virgin | POLYshine PBT D401 R | granule/pellet | Black | 1200 Kg | octabin | 1.20 €/Kg | |
PBT First choice - Virgin | RADITER BVR 300 333 BLACK | granule/pellet | Black | 2825 Kg | bags on pallet | 2.50 €/Kg | |
PBT First choice - Virgin | ULTRADUR B4500 NATURALE | granule/pellet | Natural / Neutral | 4000 Kg | octabin | 1.80 €/Kg | |
Compound PBT-GF30 LUPOX GP2300 | 3000 Kg | 4.00 €/Kg | |
Compound PBT-GF30 Deniter 3010 | 375 Kg | 2.00 €/Kg | |
Compound PBT-GF10 FR CRASTIN T841 FR BK851 | 2000 Kg | 3.25 €/Kg | |
Compound PBT FR CELANEX X680 | 250 Kg | 1.00 €/Kg | |
Polymer PBT LUPOX GP1000M | 3000 Kg | 4.43 €/Kg | |
Polymer PBT Valox 312 | 10000 Kg | 1.80 €/Kg | |
Polymer PBT POLYshine PBT D401 R | 1200 Kg | 1.20 €/Kg | |
Polymer PBT RADITER BVR 300 333 BLACK | 2825 Kg | 2.50 €/Kg | |
Polymer PBT ULTRADUR B4500 NATURALE | 4000 Kg | 1.80 €/Kg | |
Polymer List
Polimeri attualmente disponibili su PlasticFinder Wiki:
- ABS (Acrilonitrile Butadiene Stirene)
- Ecoallene
- HDPE (Polietilene ad alta densità)
- LDPE (Polietilene a bassa densità)
- PA6 (Poliammide 6, nylon 6)
- PA66 (Poliammide 66, nylon 6-6, nylon 6/6 o nylon 6,6)
- PA12 (Poliammide 12, nylon 12)
- PBT (Polibutilene Tereftalato)
- PC (Policarbonato)
- PET (Polietilen Tereftalato)
- PMMA (Polimetilmetacrilato)
- POM (Polimetilmetacrilato)
- PP (Polipropilene - Polipropene)
- PVC (Cloruro di Polivinile)