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POLYBUTYLENE TEREPHTHALATE RESIN (NEAT RESIN)

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Feature Good stability
Classification Paint Additives
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It is a thermoplastic polyester resin made by polycondensation of 1.4-butanediol (BDO) and pure terephthalic acid (PTA), and made by mixing and training procedures. It has a number of excellent characteristics, and is widely used in the electronics, electrical appliances, information, communication and automotive industries, and it is the most popular material in a wide range of engineering plastics.

Polybutylene Terephthalate (PBT) Neat Resin: Overview and Key Properties

CategoryDetails
Chemical StructureSemi-aromatic polyester, linear polymer of butanediol and terephthalic acid
TypeThermoplastic polyester (engineering plastic)
CAS Number24968-12-5

Physical & Mechanical Properties

PropertyValue/Range
Density1.30-1.38 g/cm³
Melting Point220-230°C (428-446°F)
Tensile Strength50-60 MPa
Flexural Modulus2.300-2.800 MPa
Elongation at Break50-300%
HDT @ 1.82MPa55-65°C

Thermal & Electrical Properties

PropertyPerformance
Continuous Use Temp.-40°C to 120°C
UL RatingHB (flammability)
Dielectric Strength16-20 kV/mm
Volume Resistivity10¹⁵-10¹⁶ Ω·cm

Processing Parameters

ParameterConditions
Injection Molding Temp.240-270°C
Mold Temp.60-80°C
Drying Conditions120°C for 3-4 hours

Chemical Resistance

ChemicalResistance
Oils/GreasesExcellent
AlcoholsGood
Weak AcidsFair
Strong BasesPoor
Hot WaterLimited

Applications by Industry

IndustryTypical Uses
Electrical/ElectronicConnectors, switches, circuit breakers
AutomotiveSensor housings, fuel system components
Consumer GoodsAppliance parts, power tool housings
IndustrialPump components, gear wheels

Advantages vs. Limitations

AdvantagesLimitations
Excellent electrical propertiesPoor UV resistance
Good dimensional stabilitySusceptible to hydrolysis
Fast crystallization rateLimited impact strength at low temps

Comparison with Similar Polymers

PolymerPBT vs. Alternatives
PETFaster crystallization, lower HDT
PA6/PA66Lower moisture absorption, less tough
POMBetter chemical resistance, less creep

Summary

PBT neat resin offers an optimal balance of mechanical properties, electrical characteristics, and processing ease for engineering applications. While its hydrolysis sensitivity requires consideration for outdoor use, its fast cycle times and reliability make it indispensable in electrical and automotive components. Recent developments focus on hydrolysis-resistant and sustainable variants.

Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.

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