N-poly (alkenyl) acrylamides and process for preparation thereof

Abstract

The present invention relates to novel N-Poly (alkenyl) acryl amides of formula (1) wherein m=1-8, n=2-100 and to a process for preparation thereof and process for preparation thereof by reacting an unsaturated poly(olefin) of the formula C n H 2m where n and m are as given above with acrylonitrile in presence of an acid catalyst.

1 . N-poly(alkenyl) acrylamides having formula (1) 
 Formula (1)    wherein m=1-8, n=2-100.    
   
   
       2 . N-poly(alkenyl) acrylamide of formula (1) 
 Formula (1)    wherein m=1-8, n=2-100, prepared by a process comprising reacting an unsaturated poly(olefin), with acrylonitrile in presence of an acid catalyst to obtain the N-poly(alkenyl) acrylamide.    
   
   
       3 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the reaction is carried out in the absence of a solvent.  
   
   
       4 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the unsaturated polyolefin is a vinylidene terminated poly((α-olefin).  
   
   
       5 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the unsaturated polyolefin is reacted with acrylonitrile in the presence of an acid catalyst at a temperature in the range of 50-75° C., and using a solvent if the Mn of the unsaturated polyolefin is <1000, and for a period in the range of 1-12 hours.  
   
   
       6 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the acid catalyst is selected from the group consisting of dilute sulfuric acid, dilute phosphoric acid, dilute hydrochloric acid and mixtures of concentrated sulfuric acid (98%) and acetic acid.  
   
   
       7 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein a solvent is used if the Mn of the unsaturated polyolefin <1000.  
   
   
       8 . A N-poly(alkenyl) acrylamide as claimed in  claim 7  wherein the solvent is chlorobenzene.  
   
   
       9 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the N-poly(alkenyl) acrylamide is separated by filtration.  
   
   
       10 . A N-poly(alkenyl) acrylamide as claimed in  claim 4  wherein the vinylidene terminated poly((α-olefin) is selected from the group consisting of poly(butene-1), poly(hexene-1), poly(octane-1), poly(decene-1), poly(dodecene-1) and poly(octadecene-1) and which is prepared by polymerizing a corresponding α-olefin of the formula C m H 2m  where m=4, 6, 8, 10, 12 or 18.  
   
   
       11 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein the poly(α-olefin) have a number average molecular weight in the range of 400 to 20000.  
   
   
       12 . A N-poly(alkenyl) acrylamide as claimed in  claim 2  wherein m is at least 2 or at least 4.  
   
   
       13 . A N-poly(alkenyl) acrylamide as claimed in  claim 4  wherein the vinylidene terminated poly(α-olefin) is prepared by polymerizing a corresponding α-olefin.  
   
   
       14 . A process for the preparation of a N-poly(alkenyl) acrylamide of formula (1) 
 Formula (1)    wherein m=1-8, n=2-100, comprising reacting an unsaturated poly(olefin) with acrylonitrile in presence of an acid catalyst to obtain the N-poly(alkenyl) acrylamide.