Flowable Polyester With Protection Against Hydrolysis

Abstract

Thermoplastic molding compositions, comprising A) from 10 to 98.9% by weight of at least one thermoplastic polyester, B) from 0.01 to 50% by weight of B1) at least one highly branched or hyperbranched polycarbonate or B2) at least one highly branched or hyperbranched polyester of A x B y type, where x is at least 1.1 and y is at least 2.1 or a mixture of these C) from 0.1 to 10% by weight of at least one epoxidized naturally occurring oil or fatty acid ester, or a mixture of these, and D) from 0 to 60% by weight of other additives, where the total of the percentages by weight of components A) to D) is 100%.

1 - 13 . (canceled) 
     
     
         14 . A thermoplastic molding composition, comprising
 A) from 10 to 98.9% by weight of at least one thermoplastic polyester;   B) from 0.01 to 50% by weight of
 B 1) at least one highly branched or hyperbranched polycarbonate; or 
 B2) at least one highly branched or hyperbranched polyester of A x B y  type, wherein x is at least 1.1 and y is at least 2.1; or 
 B3) mixtures of B1) and B2); 
   C) from 0.1 to 10% by weight of
 C1) at least one epoxidized naturally occurring oil; 
 C2) at least one epoxidized naturally occurring fatty acid ester; or 
 C3) mixtures of C1) and C2); and 
   D) from 0 to 60% by weight of other additives;   
       wherein the total of the percentages by weight of components A), B), C), and D) is equal to 100%. 
     
     
         15 . The thermoplastic molding composition of  claim 14 , wherein B1) has a number-average molar mass of from 100 to 15 000 g/mol. 
     
     
         16 . The thermoplastic molding composition of  claim 14 , wherein B1) has a glass transition temperature of from −80 ° C. to 140 ° C. 
     
     
         17 . The thermoplastic molding composition of  claim 14 , wherein B1) has a viscosity at 23 ° C. of from 50 to 200 000 mPas. 
     
     
         18 . The thermoplastic molding composition of  claim 14 , wherein B 1) has an OH number of from 1 to 600 mg KOH/g of polycarbonate. 
     
     
         19 . The thermoplastic molding composition of  claim 14 , wherein B2) has a number-average molar mass of from 300 to 30 000 g/mol. 
     
     
         20 . The thermoplastic molding composition of  claim 14 , wherein B2) has a glass transition temperature of from −50 ° C. to 140 ° C. 
     
     
         21 . The thermoplastic molding composition of  claim 14 , wherein B2) has an OH number of from 0 to 600 mg KOH/g of polyester. 
     
     
         22 . The thermoplastic molding composition of  claim 14 , wherein B2) has a COOH number of from 0 to 600 mg KOH/g of polyester. 
     
     
         23 . The thermoplastic molding composition of  claim 14 , wherein B2) has at least one OH number or COOH number greater than 0. 
     
     
         24 . The thermoplastic molding composition of  claim 14 , wherein the ratio of B1) to B2) is from 1:20 to 20:1. 
     
     
         25 . A fiber, foil, or molding of any type comprising the thermoplastic molding composition of  claim 14 .