Uv-stabilized, glass-fiber reinforced, flame-retardant polycarbonates for the ee and it sector

Abstract

The present invention relates to glass fibre-reinforced polycarbonate compositions of high rigidity and improved thermal and rheological properties in combination with improved flameproofing properties and a significantly increased Vicat temperature. The present invention furthermore relates to the use of the compositions according to the invention for the production of thin-walled housing parts or switch boxes in the EE (electrical/electronics) and IT (information technology) sector.

1 .- 15 . (canceled) 
     
     
         16 . A method for the production of a thin-walled shaped part in the EE sector comprising preparing a flame-resistant, thermoplastic moulding composition comprising,
 A) 41.500 to 94.899 parts by wt. of at least one aromatic polycarbonate with phenol end groups,   B) 0.001 to 1.000 part by wt. of at least one flameproofing agent,   C) 0.05 to 1.50 parts by wt. of at least one UV absorber,   D) 5.0 to 40.0 parts by wt. of at least one glass fibre,   E) 0.00 part by wt. to 1.00 part by wt. of at least one mould release agent,   F) 0.05 part by wt. to 5.00 parts by wt. of at least one antidripping agent,   G) 0.0-10.0 parts by wt. of further conventional additives,   wherein the sum of the parts by weight of components A) to F) adds up to 100 parts by weight, wherein the part has an HDT-A edgewise and flatwise of >135° C.   
     
     
         17 . The method according to  claim 16 , wherein it comprises component D) in a content of from 7.0 to 20.0 parts by wt. 
     
     
         18 . The method according to  claim 16 , wherein it comprises component G) in a content of from 0.20 to 3.0 parts by wt. 
     
     
         19 . The method according to  claim 16 , wherein it comprises component C) in a content of from 0.15 to 1.50 parts by wt. 
     
     
         20 . The method according to  claim 16 , wherein the UV absorber is selected from the group consisting of 2-(2′-hydroxy-5′-(tert-octyl)-phenyl)-benzotriazole, bis-(3-(2H-benzotriazolyl)-2-hydroxy-5-tert-octyl)methane, and N-(2-ethoxyphenyl)-N′-(2-ethylphenyl)-ethanediamide. 
     
     
         21 . The method according to  claim 16 , wherein the UV absorber is N-(2-ethoxyphenyl)-N′-(2-ethylphenyl)-ethanediamide. 
     
     
         22 . The method according to  claim 16 , wherein the polycarbonate is terminated with p-tert-butylphenol and phenol in the molar ratio of 9:1 to 1:9. 
     
     
         23 . The method according to  claim 16 , wherein the polycarbonate is terminated with p-tert-butylphenol. 
     
     
         24 . The method according to  claim 16 , wherein the glass fibre is a cut glass fibre. 
     
     
         25 . The method according to  claim 24 , wherein the cut glass fibre is produced from E- or C-glass and has a fibre diameter of from 5 to 25 μm. 
     
     
         26 . The method according to  claim 16 , wherein the flameproofing agent is selected from the group consisting of sodium and potassium perfluorobutane-sulfate, sodium and potassium perfluorooctane-sulfate, sodium and potassium diphenyl sulfone-sulfonate, sodium and potassium 2,4,6-trichlorobenzoate, N-(p-tolylsulfonyl)-p-toluenesulfimide potassium salt and N-(1V-benzylaminocarbonyl)-sulfanylimide potassium salt. 
     
     
         27 . The method according to  claim 16 , wherein the part has a flameproofing according to UL 94 5V of class A in 3 mm wall thickness. 
     
     
         28 . The method according to  claim 16 , wherein the part has a Vicat temperature of >=144° C. 
     
     
         29 . The method according to  claim 16 , wherein the part has an HDT-A edgewise and flatwise of >135° C., a flameproofing according to UL 94 5V of class A in 3 mm wall thickness and a Vicat temperature of >=144° C.