Introduction to Ultradur B 4406

Ultradur B4406 is a halogen flame-retardant PBT material launched by BASF. It combines thermal stability, UV resistance and excellent electrical properties, and is designed for high-demand electronic and lighting systems. Its low-migration light stability allows it to maintain stable appearance and performance during long-term operation.

Ultradur B4406

01 | Highlights of Ultradur B4406 material characteristics

Excellent flame retardancy: Meets UL94 V-0 rating to ensure safety in electrical systems;

Low-migration light stability: UV resistance design effectively resists surface degradation caused by ultraviolet rays;

Thermal stable formula: Suitable for continuous use under high temperature conditions;

Anti-aging design: Adding anti-UV agent effectively extends service life;

Lubricants help fluidity: Improve injection molding flow and improve mold molding efficiency;

Injection molding grade particles: Suitable for standard injection molding equipment with high molding efficiency.

02 | Ultradur B4406 innovative application areas

Automotive electrical system: meets GM QK 006511 and other specifications, suitable for connectors, sockets and relay housings;

Lighting equipment housing: maintains stable appearance and color under high temperature and strong light environment;

Household and industrial switch systems: excellent anti-aging performance, ensuring the reliability of long-term on-off operation;

Electronic connectors: excellent dimensional stability and heat resistance, suitable for precise matching requirements.

03 | Comparative advantages: Why choose Ultradur B4406?

✔ Compared with general PBT, this product has stronger weather resistance and flame retardant grade;

✔ Halogen flame retardants provide high-efficiency flame retardancy while maintaining thermal stability;

✔ Low migration makes it less likely to cause pollution in precision electronic components;

✔ Superior to the UV stability of traditional flame-retardant PBT, suitable for outdoor or high-light environment use.

04 | Technical Data Overview of PBT Ultradur B4406

UL	Condition	Standard	Value	Unit
RTI	Elec All Color 0.75mm	UL 746B	75	°C
RTI	Imp All Color 0.75mm	UL 746B	75	°C
RTI	Str All Color 0.75mm	UL 746B	75	°C
Flame Rating	All Color 0.75mm	UL94	V-0
Mechanical behavior	Condition	Standard	Value	Unit
Elongation	Yield 23°C	ASTM D638	3.9	%
Elongation	Yield 23°C	ISO 527	3.9	%
Elongation	Break 23°C	ISO 527	3.5	%
Izod Notch Impact	23°C	ASTM D256	3.75	kJ/m²
Izod Notch Impact	-40°C	ASTM D256	3.75	kJ/m²
Tensile Strength	Yield 23°C	ASTM D638	65.03	MPa
Tensile Strength	Yield 23°C	ISO 527	65.03	MPa
Tensile Modulus	23°C	ISO 527	3000	MPa
Tensile Creep Modulus	1hr	ISO 899	1800	MPa
Charpy Un-notch Impact	23°C	ISO 179	51.43	kJ/m²
Charpy Notch Impact	23°C	ISO 179	4.07	kJ/m²
Charpy Notch Impact	-30°C	ISO 179	4.07	kJ/m²
Thermal	Condition	Standard	Value	Unit
HDT	0.45MPa	ASTM D648	165	°C
HDT	Unannealed 0.45MPa	ISO 75	170	°C
HDT	Unannealed 1.8MPa	ASTM D648	80	°C
HDT	Unannealed 1.8MPa	ISO 75	60	°C
Melting Temperature		ASTM D3418	222.77	°C
Melting Temperature	DSC	ISO 3146	222.77	°C
CLE	Flow		3.1E-5	cm/cm/°C
CLE	Flow	ASTM E831	5E-5	cm/cm/°C
Physical property	Condition	Standard	Value	Unit
Water Absorption	Saturation	ASTM D570	0.40	%
Water Absorption	23°C Saturation	ISO 62	0.40	%
Shrinkage	Flow 3.2mm		1.5	%
Density		ASTM D792	1.45	g/cm³
Density		ISO 1183	1.45	g/cm³
Melt Index	250°C 2.16kg	ISO 1133	30	cm³/10min
Relative Viscosity		ISO 1628	122.0	mL/g
Electrical properties	Condition	Standard	Value	Unit
CTI		IEC 60112	250	V
Dielectric Constant	1MHz	IEC 60250	3.30
Dielectric Constant	100Hz	IEC 60250	3.30
Volume Resistivity		IEC 60093	1E15	Ω.cm
Volume Resistivity	1.5mm	ASTM D257	1E15	Ω.cm
Dissipation Factor	1MHz	IEC 60250	0.017
Dissipation Factor	100Hz	IEC 60250	0.011
Surface Resistivity		IEC 60093	1E13	Ω
Surface Resistivity	1.5mm	ASTM D257	1E13	Ω
Flammability	Condition	Standard	Value	Unit
Flame Rating	All Color 0.75mm	UL94	V-0

05 | Ultradur B4406 Processing Recommendations and Precautions

Recommended processing method: standard injection molding;

Processing temperature range: suitable for medium and high temperature injection molding process;

Mold maintenance: It is recommended to use molds with corrosion protection to extend life;

Drying treatment: It is recommended to dry before molding to prevent hydrolysis from affecting performance.

06 | How to determine whether PBT B 4406 is suitable for your project?

Please give priority to the following dimensions:

・Require UL94 V-0 grade flame retardant performance;

・The product is exposed to ultraviolet light or high temperature environment for a long time;

・There are high requirements for dimensional stability and surface finish;

・Applied to connectors, sockets, lighting equipment and other parts with high reliability requirements.

07 | Get samples and technical information

If you want to learn more about Ultradur B4406 or conduct proofing tests, please contact us to obtain:

・Technical Data Sheet (TDS)

・Molding Process Guide

・IMDS Information and Automotive Certification Information

We support the provision of samples with different packaging specifications to help you accelerate product development.

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Ultradur B4406 Overview | Durable, Flame-Retardant PBT Material

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