Product Information
Dec 2018
Ultradur® B 4040 G11 HMG BK15029
Polybutylene Terephthalate/Polyethylene Terephthalate (PBT/PET)

Product Description
Ultradur B 4040 G11 HMG BK15029 (formerly Ultradur HMG12 BK15029) is a 55% glass fiber reinforced PBT+PET grade. In addition to high stiffness it offers exceptional dimensional stability.

Typical applications include automotive exterior components such as mirror brackets and wiper arms.

PHYSICAL ISO Test Method Property Value
Density, g/cm³ 1183 1.81
MECHANICAL ISO Test Method Property Value
Tensile Modulus, MPa 527  
    23C 21,000
Tensile stress at break, MPa 527  
    23C 163
Tensile strain at break, % 527  
    23C 1.3
Flexural Modulus, MPa 178  
    23C 19,200
IMPACT ISO Test Method Property Value
Izod Notched Impact, kJ/m2 180  
    -40C 11
    23C 10
Charpy Notched, kJ/m2 179  
    23C 10
Charpy Unnotched, kJ/m2 179  
    23C 47
THERMAL ISO Test Method Property Value
Melting Point, C 3146 223
HDT A, C 75 207
HDT B, C 75 219

Processing Guidelines
Material Handling
Max. Water content: 0.04%
To ensure optimum part performance, this product must be dried prior to molding and maintained at a moisture level of less than 0.04%. Dehumidifying or desiccant dryers operating at 100-120C (212-248F) for 4 hours drying time are recommended. Further information concerning safe handling procedures can be obtained from the Safety Data Sheet. Alternatively, please contact your BASF representative.

Typical Profile
Melt Temperature 250-270C (482-518F)
Mold Temperature 60-100C (140-212F)
Injection and Packing Pressure 35-125 bar (500-1500 psi)

Mold Temperatures
This product can be processed over mold temperatures of 60-100C (140-212F); however, for optimizing surface appearance, dimensional stability and part performance, mold surface temperatures of at least 80C (176F) are preferred.

Injection pressure controls the filling of the part and should be applied for 90% of ram travel. Packing pressure affects the final part and can be used effectively in controlling sink marks and shrinkage. It should be applied and maintained until the gate area is completely frozen off.

Back pressure can be utilized to provide uniform melt consistency and reduce trapped air and gas. A maximum of 10 bar (145 psi) is recommended due to the risk of excessive shear.

Fill Rate
Fast fill rates are recommended to ensure uniform melt delivery to the cavity and prevent premature freezing. Surface appearance is directly affected by injection rate.

Although all statements and information in this publication are believed to be accurate and reliable, they are presented gratis and for guidance only, and risks and liability for results obtained by use of the products or application of the suggestions described are assumed by the user. NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE MADE REGARDING PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION SET FORTH. Statements or suggestions concerning possible use of the products are made without representation or warranty that any such use is free of patent infringement and are not recommendations to infringe any patent. The user should not assume that toxicity data and safety measures are indicated or that other measures may not be required.

  BASF Corporation
Engineering Plastics
1609 Biddle Avenue
Wyandotte, MI 48192
General Information: 800-BC-RESIN
Technical Assistance: 800-527-TECH (734-324-5150)
Web address: