Alloys based on Bis-phenol A Polycarbonates

Alloys of bisphenol A polycarbonates with ABS and MBS resins have been known for many years. Subsequently many other alloys containing polycarbonates have been introduced so that by the mid-1990s they comprised at least 15% of the polycarbonate market. 

The styrene-based terpolymers were originally used to the extent of some 2-9% in order to reduce the notch sensitivity of the polycarbonate and to improve the environmental stress cracking resistance. More recently emphasis has been on alloys with 10-50% of SAN or ABS. Alloys of polycarbonates with ASA have also become available (Luran SC-BASF) 

Because of the above properties, together with other features such as the ability to mould to close dimensional tolerances, low warpage, low shrinkage, low moisture absorption and good surface finish, polycarbonate-ABS alloys have become widely used in the automotive industry, for electrical applications and for housings of domestic and business equipment. 

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