Polyamide and composition and article including the same

Abstract

A polyamide that includes the reaction product of dimer acid (e.g. a dimer acid including at least 98% by weight dimer), caprolactam, hexamethylene diamine, sebacic acid, and optionally, chain terminating agent.

1 . An article comprising a polyamide comprising the reaction product of 
 dimer acid;    caprolactam;    hexamethylene diamine;    sebacic acid; and    optionally, chain terminating agent,    said polyamide exhibiting a viscosity no greater than 20,000 centipoise at 205° C.    
     
     
         2 . The article of  claim 1  wherein said polyamide is in a form selected from the group consisting of film, fibers, nonwoven web, woven web, and combinations thereof.  
     
     
         3 . The article of  claim 2 , wherein said polyamide is in the form of a film and said article is in the form of a label comprising said polyamide film.  
     
     
         4 . The article of  claim 1  further comprising a substrate, and a composition comprising said polyamide polymer disposed on said substrate.  
     
     
         5 . The article of  claim 4 , wherein the substrate comprises fibers.  
     
     
         6 . The article of  claim 4 , wherein said substrate is porous.  
     
     
         7 . The article of  claim 4 , wherein said article is in the form of a filter or a label.  
     
     
         8 . The article of  claim 4 , wherein said composition is a hot melt adhesive composition.  
     
     
         9 . An article comprising a polyamide polymer comprising the reaction product of 
 dimer acid comprising at least 98% by weight dimer,    caprolactam,    hexamethylene diamine,    dicarboxylic acid, and    optionally, chain terminating agent.    
     
     
         10 . The article of  claim 9 , wherein said dicarboxylic acid comprises sebacic acid.  
     
     
         11 . The article of  claim 10 , wherein said polyamide polymer is in a form selected from the group consisting of film, fibers, nonwoven web, woven web, and combinations thereof.  
     
     
         12 . The article of  claim 10  further comprising a substrate, and a composition comprising said polyamide polymer, said composition being in contact with said substrate.  
     
     
         13 . The article of  claim 12 , wherein the substrate comprises at least one of a film, fibers, nonwoven web, and woven web.  
     
     
         14 . The article of  claim 12 , wherein the article is in the form of a filter or a label.  
     
     
         15 . The article of  claim 13 , wherein said composition is a hot melt adhesive composition.  
     
     
         16 . The article  claim 12 , further comprising ink.  
     
     
         17 . The article of  claim 16 , wherein said composition is in the form of a coating on said substrate, said ink being in contact with said coating.  
     
     
         18 . The article of  claim 12 , wherein said substrate is impregnated with said composition.  
     
     
         19 . The article of  claim 14 , wherein said substrate is selected from the group consisting of a nonwoven web and a woven web, and said polyamide polymer comprises the reaction product of from about 15 parts by weight to about 25 parts by weight said dimer acid, from about 25 parts by weight to about 35 parts by weight epsilon caprolactam, from about 20 parts by weight to about 25 parts by weight said sebacic acid, and from about 15 parts by weight to about 25 parts by weight said hexamethylene diamine.  
     
     
         20 . The article of  claim 12 , wherein said composition comprises a hot melt adhesive composition and said substrate has a first surface and a second surface, said first surface is bonded to said second surface through said hot melt adhesive composition.  
     
     
         21 . The article of  claim 20 , wherein said substrate is porous.  
     
     
         22 . The article of  claim 20 , wherein said substrate comprises pleats.  
     
     
         23 . The article of  claim 20 , wherein said first surface comprises a first terminal pleat of said filter and said second surface comprises a second terminal pleat of said filter.  
     
     
         24 . The article of  claim 20 , wherein said article is in the form of a fuel filter.  
     
     
         25 . The article of  claim 20 , wherein said hot melt adhesive composition is capable of maintaining said surfaces of said substrates bonded together after immersion of said article in motor oil for a period of seven days at 250° F.  
     
     
         26 . The article of  claim 9  further comprising: 
 a substrate; and    a hot melt composition comprising said polyamide polymer and a ultraviolet light stabilizing agent, said hot melt composition being in contact with said substrate.    
     
     
         27 . The article of  claim 26 , wherein said ultraviolet light stabilizing agent comprises 2,5-thiophenyediylbis(5-tert-butyl-1,3-benzoxazole).  
     
     
         28 . The article of  claim 26 , wherein said dicarboxylic acid is selected from the group consisting of sebacic acid, dodecanoic acid, adipic acid, azelaic acid, and combinations thereof.  
     
     
         29 . An article in the form of a filter comprising: 
 a porous substrate; and    an adhesive composition disposed on said porous substrate, said adhesive composition comprising the reaction product of 
 dimer acid;  
 caprolactam;  
 hexamethylene diamine;  
 dicarboxylic acid; and  
 optionally, chain terminating agent,  
   said adhesive composition exhibiting less than 18 mg extractives residue/in 2  porous substrate when tested according to the Extraction Test Method using a water extraction media.