Low gloss thermoplastic articles

Abstract

A composition of matter comprising an article derived from a composition containing: a. from about 30 to 80 wt. % of a polycarbonate component, b. from about 5 to about 50 wt. % of a polyester component, wherein when polybutylene terephthalate is present in the composition, the polybutylene terephthalate is present in conjunction with at least one other polyester that is not polybutylene terephthalate; c. about 2 to about 25 wt. % of an impact modifier; and d. a gloss reducing effective amount of a multifunctional additive comprising at least one epoxy group. The invention also includes injection molding processes, thermoforming processes for making articles.

1 . A composition of matter comprising an article derived from a composition containing: 
 a. from about 30 to 80 wt. % of a polycarbonate component,    b. from about 5 to about 50 wt. % of a polyester component, wherein when polybutylene terephthalate is present in the composition, the polybutylene terephthalate is present in conjunction with at least one other polyester that is not polybutylene terephthalate;    c. about 2 to about 25 wt. % of an impact modifier; and    d. a gloss reducing effective amount of a multifunctional additive comprising at least one epoxy group.    
     
     
         2 . The composition of matter in accordance with  claim 1 , wherein the polycarbonate is from about 45 to 75 wt. %, the polyester is from about 10 to about 45 wt. % and the impact modifier is from about 4 to about 20 wt. %.  
     
     
         3 . The composition of matter in accordance with  claim 1 , wherein the multifunctional additive is present in an amount that is at least about 0.1 wt. %.  
     
     
         4 . The composition of matter of  claim 3 , wherein the wherein the multifunctional additive is present in an amount that is less than about 5.0 wt %.  
     
     
         5 . The composition of matter of  claim 4 , wherein the viscosity of the composition is less than about 500 Pa-s at 271° C. as measured by capillary rheometry following the ISO 11443 standard.  
     
     
         6 . The composition of matter of  claim 4 , wherein the multifunctional additive has an epoxy group and a silane group.  
     
     
         7 . The composition of matter of  claim 4 , wherein the multifunctional additive has two epoxy groups.  
     
     
         8 . The composition of matter of  claim 1 , wherein the article is an injected molded article.  
     
     
         9 . The composition of matter of  claim 1 , wherein the article is a thermoformed article.  
     
     
         10 . A process for making an article by injection molding comprising: 
 (a) heating a composition to a temperature that is at least the melting point of the composition to a viscous liquid    (b) injecting the viscous liquid under pressure into a mold cavity dimensioned to the length, width, and height of a the article, and    (c) allowing the injection molded article to cool and solidify into the article,    (d) removing the article from the mold cavity; wherein composition comprises:      1 ) from about 30 to 80 wt. % of a polycarbonate component,    2) from about 5 to about 50 wt. % of a polyester component, wherein when polybutylene terephthalate is present in the composition, the polybutylene terephthalate is present in conjunction with at least one other polyester that is not polybutylene terephthalate;      3 ) from about 2 to about 25 wt. % of an impact modifier; and      4 ) a gloss reducing effective amount of a multifunctional additive comprising at least one epoxy group.    
     
     
         11 . A thermo-forming process for making an article comprising: 
 (a) extruding a sheet having at least one layer from a composition comprising: 
 ( 1 ) from about 30 to 80 wt. % of a polycarbonate component,  
 (5) from about 5 to about 50 wt. % of a polyester component, wherein when polybutylene terephthalate is present in the composition, the polybutylene terephthalate is present in conjunction with at least one other polyester that is not polybutylene terephthalate;  
 (6) about 2 to about 25 wt. % of an impact modifier; and  
 (7) a gloss reducing effective amount of a multifunctional additive comprising at least one epoxy group.  
   (b) heating the sheet to a temperature sufficient to soften the sheet,    (c) applying the sheet over a mold dimensioned to the length, width, and height of the article,    (d) cooling and removing the article from the mold.