glass fiber reinforced polypropylene

Abstract

The present invention concerns an improved glass fiber reinforced polypropylene composition as well as articles formed from this composition, wherein the composition, comprises a) More than 15-wt % glass fibers, and b) a specific heterophasic polypropylene composition with an at least bimodal disperse phase.

1 . Composition, comprising
 a) more than 15-wt % glass fibers, and   b) a heterophasic polypropylene composition, comprising a matrix phase and at least two disperse elastomeric components, wherein the heterophasic polypropylene composition has an overall comonomer content of 12-wt % or more and wherein the at least two disperse elastomeric components have a comonomer content of 20-wt % or more.   
     
     
         2 . Composition according to  claim 1 , wherein the comonomer is ethylene. 
     
     
         3 . Composition according to  claim 1  or  2 , wherein the disperse phase of the heterophasic polypropylene consists of two phases. 
     
     
         4 . Composition in accordance with any one of  claims 1  to  3 , wherein the glass fiber content is from 20 to 40-wt %. 
     
     
         5 . Composition in accordance with any one of  claims 1  to  4 , wherein the heterophasic polypropylene composition displays an overall MFR 2  of from 9 to 15 g/10 min and the matrix phase of the heterophasic polypropylene composition displays an MFR 2  of from 30 to 70 g/10 min. 
     
     
         6 . Composition in accordance with any one of  claims 1  to  5 , wherein the composition further comprises up to 20-wt % of an elastomeric ethylene copolymer with an alpha-olefin with from 6 to 12 carbon atoms. 
     
     
         7 . Composition in accordance with any one of  claims 1  to  6 , wherein the composition comprises from 50 to 70-wt % of the heterophasic polypropylene. 
     
     
         8 . Composition in accordance with any one of  claims 1  to  7 , wherein the composition further comprises additives, selected from antioxidants, stabilizers, coloring agents, UV stabilizers, nucleating agents, antistatic agents, slip/mold release agents, and coupling agents present in amounts of 2-wt % each or less. 
     
     
         9 . Molded article, comprising the composition according to any one of  claims 1  to  8 . 
     
     
         10 . Use of the composition according to any one of  claims 1  to  8  for the preparation of molded articles.