POLYMERS AND POLYMER BLENDS WITH ENHANCED GLOSS LEVEL

摘要

The present invention provides a polycarbonate composition containing hydroxy aluminum hydroxide which exhibits increased gloss level. This effect is seen in polycarbonate blend or blends of polycarbonate and polyesters. This additive is effective in increasing the gloss level of polymer or polymer blend with gloss levels lower than 80 at 20 degree incident angle.

主权项

1. A thermoplastic molding composition comprising:
A) 50 to 98 wt. % aromatic poly(ester) carbonate having a weight-average molecular weight of at least 25,000; B) a flame retardant; C) 1 to 20 wt. % of a graft (co)polymer having a core-shell morphology, including a grafted shell that contains polymerized alkyl(meth)acrylate and a composite rubber core that contains interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate components, wherein said core is in the form of particles having median particle size of 0.05 to 5 microns and glass transition temperature below 0° C., and wherein weight ratio of polyorganosiloxane/poly(meth)alkylacrylate/rigid shell is 5-90/5-90/5-15; D) greater than zero wt. % to 7.0 wt. % aluminum oxide,wherein the sum of the wt. %, totals 100 and wherein the composition exhibits an increased gloss level at 20 degrees over that of a similar composition not containing aluminum oxide.