Novel hydrotalcites, syntheses, and uses

Abstract

Synthetic hydrotalcites of the general formula [M 2+ 1-x M 3+ x (OH) 2 ] x+ [A n− x/n ·mH 2 O] x− where M 2+ is a divalent cation, M 3+ is a trivalent cation and A n− is an organic anion selected from straight chain carboxylates of C 16 -C 18 acids, carboxylates of aromatic acids, carboxylates of acrylic acid, unsaturated carboxylates of methacrylic acid, unsaturated carboxylates of vinylacetic acid and C 2 and higher organic acids containing heteroatoms such as nitrogen, phosphorous, sulfur and halogens are disclosed, along with methods of synthesis and uses.

1 . A synthetic hydrotalcite-poly-addition polymer blend comprising: 
 a maleated polyolefin, at least one unmodified poly-addition polymer; and a synthetic hydrotalcite of the general formula:      [M 2+   1-x M 3+   x (OH) 2 ] x+ [A n−   x/n ·mH 2 O] x−     wherein M 2+  is a divalent cation, M 3+  is a trivalent cation and A n−  is at least one organic anion comprising a carboxylate of an amino acid.    
     
     
         2 . The synthetic hydrotalcite-poly-addition polymer blend of  claim 1 , wherein said amino acid comprises 4-aminobtyric acid.  
     
     
         3 . The synthetic hydrotalcite-poly-addition polymer blend of  claim 1 , wherein said amino acid comprises 6-aminocaproic acid.  
     
     
         4 . The synthetic hydrotalcite-poly-addition polymer blend of  claim 1 , wherein said maleated polyolefin bonds with said amino acid in the form of an amide.  
     
     
         5 . The synthetic hydrotalcite-poly-addition polymer blend of  claim 1 , wherein said maleated polyolefin bonds with said amino acid in the form of an imide.  
     
     
         6 . The synthetic hydrotalcite-poly-addition polymer blend of  claim 1 , wherein said at least one unmodified polymer is selected from the group consisting of polypropylene, polyethylene, polybutene-1, poly-4-methyl pentene-1, polyvinyl chloride and polystyrene.