Glass fiber reinforced polycarbonate molding compositions

Abstract

The invention relates to glass fiber reinforced polycarbonate compositions and molding compositions of the present inventor and distinguished by high rigidity, high flowability, high processing stability, good chemical resistance and good aging resistance vis-à-vis the effects of light and heat compared with the prior art. The present invention also relates to the use of the compositions for the production of shaped articles and to shaped articles comprising the compositions according to the invention.

1 . A composition comprising
 A) 10 to 85 parts by weight a polycarbonate, and/or a polyester carbonate,   B) 10 to 50 parts by weight rubber-free vinyl copolymer,   C) 5 to 50 parts by weight of sized glass fiber, wherein the size comprises an epoxy polymer,   D) 0 to 2 parts by weight of a rubber-modified graft polymer, and   E) 0 to 10 parts by weight of a polymer additive,   the composition being free from rubber-modified polymers which differ from component D).   
   
   
       2 . A composition according to  claim 1 , comprising 15 to 40 parts by weight of said rubber-free vinyl copolymer. 
   
   
       3 . A composition according to  claim 1 , comprising 20 to 35 parts by weight of rubber-free vinyl copolymer. 
   
   
       4 . A composition according to  claim 1 , comprising 0 to 1 parts by weight of a rubber-modified graft polymer. 
   
   
       5 . A composition according to  claim 1 , which is free from rubber-modified graft polymer. 
   
   
       6 . The composition according to  claim 1 , wherein component C is a sized glass fiber with
 C.1 a glass fiber comprising at least one component selected from the group consisting of continuous strands, long glass fibers and chopped glass strands,   C.2 a size containing an epoxy polymer, and   C.3 optionally an adhesion promoter.   
   
   
       7 . A composition according to  claim 6  comprising as component C, a glass fiber with a size C.2 consisting essentially of:
 C.2.1 50 to 100 wt. %, based on the total weight of C.2, of an epoxy polymer, and   C.2.2 0 to 50 wt. %, based on the total weight of C.2, of at least one polymer selected from the group consisting of the polyurethanes, polyolefins, acrylate-containing polymers, styrene-containing polymers and polyamides.   
   
   
       8 . A composition according to  claim 7 , wherein the epoxy polymer C.2.1 comprises an epoxy resin made from
 C.2.1.1 epichlorohydrin and   C.2.1.2 an alcohol, which has at least two hydroxyl groups.   
   
   
       9 . A composition according to  claim 8 , in which bisphenol A is used as the alcohol C.2.1.2. 
   
   
       10 . A composition according to  claim 1 , wherein the sized glass fiber according to component C has a carbon content of 0.1 to 1 wt. %. 
   
   
       11 . A composition according to  claims 1 , wherein the glass fiber according to component C has an average diameter of 5 to 25 μm. 
   
   
       12 . A composition according to  claims 1 , wherein component E comprises at least one additive selected from the group consisting of flame retardants, anti-drip agents, lubricants and mold release agents, nucleating agents, antistatic agents, stabilisers, fillers, reinforcing materials other than component C, dyes and pigments. 
   
   
       13 . A composition according to  claim 1 , wherein component B is a rubber-free vinyl copolymer of
 B.1 70 to 80 wt. %, based on the total weight of component B, of at least one monomer selected from the group consisting of the vinyl aromatics and ring-substituted vinyl aromatics and   B.2 20 to 30 wt. %, based on the total weight of component B, of at least one monomer selected from the group consisting of the vinyl cyanides, (meth)acrylic acid (C 1 -C 8 ) alkyl esters, unsaturated carboxylic acids and derivatives of unsaturated carboxylic acids.   
   
   
       14 . A composition according to  claim 13 , wherein component B.1 is styrene and component B.2 is acrylonitrile. 
   
   
       15 . A composition according to  claim 1 , comprising as component D, a rubber-based graft polymer which is substantially free from double bonds. 
   
   
       16 . A composition according to  claim 15 , comprising as component D, a rubber-based graft polymer selected from the group consisting of acrylate rubber, silicone rubber and silicone-acrylate composite rubber. 
   
   
       17 . A method for the production of a shaped article comprising employing a composition according to  claim 1 . 
   
   
       18 . A shaped article comprising a composition according to  claim 1 .