Peba for direct adhesion to tpe

Abstract

The invention relates to a copolymer having polyamide PA blocks and polyether PE blocks, in which PA is of diamine.diacid X.Y type; X, the number of carbons of the diamine, is within the range from 6 to 14, and Y, the number of carbons of the diacid, is within the range from 6 to 18. The invention also relates to the use of the said copolymer in a process of direct adhesion between two TPE materials for increasing the peel strength between these materials.

What is claimed is: 
     
         1 . Copolymer having polyamide PA blocks and polyether PE blocks, in which PA is of X.Y type; X, the number of carbons of the diamine, is within the range from 6 to 14, and Y, the number of carbons of the diacid, is within the range from 6 to 18. 
     
     
         2 . Copolymer according to  claim 1 , in which X is chosen from 6 or 10 and Y is chosen from 10 or 12. 
     
     
         3 . Copolymer according to  claim 1 , in which PE is chosen from PTMG, PPG, PO3G and/or PEG. 
     
     
         4 . Copolymer according to  claim 1 , in which said copolymer comprises from 51 to 90% by weight of polyamide blocks and respectively from 49 to 10% by weight, of polyether blocks, with respect to the total weight of copolymer. 
     
     
         5 . Copolymer according to  claim 1 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 500 to 10,000. 
     
     
         6 . Copolymer according to  claim 1 , in which the number-average molecular weight (Mn) of the PE blocks is within the range from 400 to 1,000. 
     
     
         7 . Copolymer according to  claim 2 , wherein PA X.Y is PA 6.10 or PA 6.12. 
     
     
         8 . Copolymer according to  claim 3 , in which PE is chosen from PTMG, PPG and/or PO3G. 
     
     
         9 . Copolymer according to  claim 4 , in which said copolymer comprises from 60 to 90% by weight of polyamide blocks and respectively from 40 to 10% by weight and of polyether blocks, with respect to the total weight of copolymer. 
     
     
         10 . Copolymer according to  claim 9 , in which said copolymer comprises from 65 to 85% by weight of polyamide blocks and respectively from 35 to 15% by weight and of polyether blocks, with respect to the total weight of copolymer. 
     
     
         11 . Copolymer according to  claim 5 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 1,000 to 10,000. 
     
     
         12 . Copolymer according to  claim 11 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 2000 to 9000. 
     
     
         13 . Copolymer according to  claim 12 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 2000 to 6000. 
     
     
         14 . Copolymer according to  claim 13 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 2000 to 3000. 
     
     
         15 . Copolymer according to  claim 14 , in which the number-average molecular weight (Mn) of the PA blocks is within the range from 2500 to 3000. 
     
     
         16 . Copolymer according to  claim 6 , in which the number-average molecular weight (Mn) of the PE blocks is within the range from 500 to 1000. 
     
     
         17 . Copolymer according to  claim 15 , in which the number-average molecular weight (Mn) of the PE blocks is within the range from 600 to 700. 
     
     
         18 . Copolymer according to  claim 16 , in which the number-average molecular weight (Mn) of the PE blocks is within the range from 600 to 650.