Ultradur®

PBTBASF

Ultradur® is BASF’s polybutylene terephthalate (PBT) product family. It delivers excellent dimensional stability, low moisture absorption, and superior electrical insulation, and is widely used in connectors, switches, sensor housings, and automotive components.

Ultradur® Grade List (19)

Unreinforced2 Grades

Product	Composition (Abbreviation)	Density Kg/m³, ISO 1183	Tensile (Tensile modulus) MPa, ISO 527-1	Impact (Charpy notched) KJ/m², ISO 179/1eA	HDT B ℃, ISO 75-1	Detail
B4560	PBT	1300	2600	3.8	60
B4520	PBT	1300	2400	5	55

Reinforced9 Grades

Product	Composition (Abbreviation)	Density Kg/m³, ISO 1183	Tensile (Tensile modulus) MPa, ISO 527-1	Impact (Charpy notched) KJ/m², ISO 179/1eA	HDT B ℃, ISO 75-1
LUX B4300G6	PBT-GF30	1540	10000	8.5	205
LUX B4300G4	PBT-GF20	1460	7300	6.5	200
B4406G4	PBT-GF20	1600	8200	48	200
B4406G2	PBT	1520	5500	40	190
B4330G6 HR	PBT-I-GF30	1490	8700	14	205
B4300G6 HSP	PBT-GF30	1530	9700	7.5	205
B4300G6 HR	PBT-GF30	1510	8700	12	205
B4450G5	PBT-GF25	1600	10000	45	210
B4300G6	PBT-GF30	1530	9800	9	205

Blend5 Grades

Product	Composition (Abbreviation)	Density Kg/m³, ISO 1183	Tensile (Tensile modulus) MPa, ISO 527-1	Impact (Charpy notched) KJ/m², ISO 179/1eA	HDT B ℃, ISO 75-1
B4040G6	PBT+PET	1550	10500	8	200
S4090G6	PBT	1470	9700	7	175
S4090G4	PBT	1390	6900	5.5	160
S4090G2	PBT	1310	4500	4	105
B4040G10	PBT+PET	1730	18000	10	205

Specialty3 Grades

Product	Composition (Abbreviation)	Density Kg/m³, ISO 1183	Tensile (Tensile modulus) MPa, ISO 527-1	Impact (Charpy notched) KJ/m², ISO 179/1eA	HDT B ℃, ISO 75-1
B4521 PRO	PBT	1300	2650	3.5	55
B4520 HSP	PBT	1300	2200	4	55
B4450G5 HR	PBT-GF25	1580	8700	55	210

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