Polybutylene terephthalate (PBT) is a semi-crystalline thermoplastic material and is highly resistant to dynamic stresses, abrasion and impact. It stands out for its high rigidity (tensile modulus from 1,700 to 17,000 Mpa) and the excellent resistance to thermal deformation; the continuous use temperature varies, depending on the type, from 120 to 140 ° C (briefly also from 160 to 170 °C). Thermal resistance can be improved by adding heat stabilizers or with mineral fillers or glass fiber reinforcements. Important, in particular for the automotive sector, is also the high resistance to chemical agents, for example fuels, alcohol, fats, oils, diluted acids and saline solutions.
PBT also has excellent electrical characteristics, such as good resistance to sliding currents and good dielectric rigidity; its less polar nature, compared to other polyesters, makes it less sensitive to the absorption of impurities, and this therefore allows it to show good electrical properties even when exposed to humidity at different temperatures. Therefore electrical / electronic elements are among its main applications.
The impact resistance increases with the molecular weight, also showing an excellent behavior under both static and dynamic load. Subjected to creep and fatigue tests, these polymers resist strong deformation for long periods of time, even under high stress.
PBT qualitative properties: good chemical resistance, excellent rigidity and hardness, high wear resistance, resistance to solvents, high resistance to continuous operating temperatures, excellent resistance to yielding even at high temperatures, great rigidity, good friction properties, abrasion resistance, high dimensional stability, good resistance to atmospheric agents, absence of cracks due to environmental stress.
Applications:
- Automotive;
- Electrical and electronic items;
- Household goods;
- Builiding.
Natural or Compound types of colored PBT (RAL, Pantone or sample references) for injection molding.
Available in various versions:
- HF: low Viscosity;
- MV: medium Viscosity;
- HV: high Viscosity.
Coloring : Full Compound or Dry Blend (SPL).
Natural or Compound types of colored PBT FV or SV (RAL, Pantone or sample references) with different grades of glass fiber or glass beads reinforcements for injection molding of parts requiring a greater rigidity.
Available in various versions:
- FV: glass fiber reinforced with different grades (30%, 50%);
- SV: glass beads reinforced with different grades (20%, 30%);
- EM: different grades of elastomeric filler;
- LS: toughened laser marking (FV 30% EM2);
or, if possible, with a combination of the above characteristics.
Coloring : Full Compound or Dry Blend (SPL).
Natural or Compound types of colored PBT FR (RAL, Pantone or sample references) for injection molding of flame-inhibited parts.
Available in various versions:
- V0M: flame retardant, halogens and red phosphorous free;
- V0A: flame retardant with halogens PBB/PBDE free.
Coloring : Full Compound or Dry Blend (SPL).
Natural or Compound types of colored PBT FR FV (RAL, Pantone or sample references) for injection molding of flame-inhibited glass fiber reinforced parts. This solution results suitable for applications that require both self-extinguishing and greater rigidity.
Available in version:
- FV 30% V0A : glass fiber reinforced, flame retardant with halogens PBB/PBDE free.
Coloring : Full Compound or Dry Blend (SPL).
Natural or Compound types of colored PBT (RAL, Pantone or sample references).
Available in various versions:
- EM: different grades of elastomeric;
- LUB: PTFE or SI (Silicone) lubricated;
- LS: toughened laser marking (FV 30% EM2).
Coloring : Full Compound or Dry Blend (SPL).
TECHNICAL CHART
The chart shows the various types of products we are present on the market with:
PBT chemical formula : (C12H12O4)n
PBT chemical name (IUPAC): Poly(oxy-1,4-butanediyloxycarbonyl-1,4-phenylenecarbonyl)
CAS Number : 24968-12-5
PBT recycling code: Number 7
Custom tariff: 39079910
