Reactor TPO: Innovations in Low Temperature Ductility and TPO At-Press for Dimensional Control

摘要

Material specifications for exterior TPO applications require materials which are highly ductile at temperatures as low as -40?C. A compounded TPO must use a particular PP, and 30-35% additional elastomer to obtain such a ductile performance. The composition complexity and an additional heat history has to be added via compounding to meet the specifications. A new reactor TPO INSPIRE? DTF8200 has been developed which is fully ductile at - 40?C. This performance is the result of a product design based on specific elastomer design and MWD distribution while still being produced in the reactor. The resulting flexural modulus is greater than 950 MPa and coefficients of linear thermal expansion (CLTE) = 90-100μm/m??C. This reactor TPO will meet the functional requirements for many bumper fascia designs. In cases where higher modulus and/or lower CLTE is required, a novel 70% talc filled master-batch has been developed to allow easy dispersion within an injection molding press to control part fit and finish. The system name is INSPIRE At-Press TF8200.71 and examples of large part fascia developments mixing reactor TPO and 70% talc MB will be shown.