Creping adhesives and methods for making and using same

Abstract

Creping adhesives and methods for making and using same are provided. The creping adhesive can include a first thermosetting polyamidoamine-epihalohydrin resin that includes a reaction product of a first epihalohydrin and a first polyamidoamine containing one or more secondary amine groups, a first thermoplastic polyamidoamine-epihalohydrin resin that includes a reaction product of a second epihalohydrin and a second polyamidoamine containing one or more secondary amine groups, and one or more re-wetting agents. The first thermosetting polyamidoamine-epihalohydrin resin can have a weight average molecular weight of about 800,000 to about 1,200,000 and a molar ratio of the first epihalohydrin to the secondary amine groups of about 0.002:1 to about 0.1:1. The first thermoplastic polyamidoamine-epihalohydrin resin can have a weight average molecular weight of about 40,000 to about 200,000 and a molar ratio of the second epihalohydrin to the secondary amine groups of about 0.001:1 to about 0.1:1.

What is claimed is: 
     
         1 . A creping adhesive, comprising:
 a thermosetting polyamidoamine-epihalohydrin resin comprising a reaction product of a first epihalohydrin and a first polyamidoamine containing one or more secondary amine groups; and   a thermoplastic polyamidoamine-epihalohydrin resin comprising a reaction product of a second epihalohydrin and a second polyamidoamine containing one or more secondary amine groups.   
     
     
         2 . The creping adhesive of  claim 1 , wherein the thermosetting polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 800,000 to about 1,200,000, and wherein the thermoplastic polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 40,000 to about 200,000. 
     
     
         3 . The creping adhesive of  claim 1 , wherein a molar ratio of the first polyamidoamine to the first epihalohydrin is about 0.75:1 to about 1.8:1, and wherein a molar ratio of the second polyamidoamine to the second epihalohydrin is about 2:1 to about 100:1. 
     
     
         4 . The creping adhesive of  claim 1 , wherein:
 the first epihalohydrin and the second epihalohydrin comprise epichlorohydrin,   the first polyamidoamine comprises a reaction product of a first polyamine and at least one of a first dicarboxylic acid and a first ester of a dicarboxylic acid, and   the second polyamidoamine comprises a reaction product of a second polyamine and at least one of a second dicarboxylic acid and a second ester of a dicarboxylic acid.   
     
     
         5 . The creping adhesive of  claim 4 , wherein:
 the first dicarboxylic acid and the second dicarboxylic acid, if present, comprise adipic acid, glutaric acid, or a mixture thereof,   the first ester of a dicarboxylic acid and the second ester of a dicarboxylic acid, if present, comprise dimethyl glutarate, diethyl glutarate, dimethyl adipate, diethyl adipate, or a mixture thereof, and   the first polyamine and the second polyamine each comprise diethylenetriamine, triethylenetetramine, tripropylenetetramine, tetraethylenepentamine, pentaethylenehexamine, methyl bis(3-aminopropyl)-amine, dipropylenetriamine, bis(hexamethylene)triamine, bis-2-hydroxyethyl ethylenediamine, or a mixture thereof.   
     
     
         6 . The creping adhesive of  claim 1 , further comprising a re-wetting agent. 
     
     
         7 . The creping adhesive of  claim 6 , wherein the re-wetting agent comprises a protonated amine, a protonated polyamine, a quaternary ammonium salt, glycerin, a salt of a polycarboxylic acids neutralized with triethanolamine, or any mixture thereof. 
     
     
         8 . The creping adhesive of  claim 6 , wherein the re-wetting agent comprises a poly-quaternary ammonium salt. 
     
     
         9 . The creping adhesive of  claim 6 , wherein the creping adhesive comprises about 5 wt % to about 80 wt % of the thermosetting polyamidoamine-epihalohydrin resin, about 15 wt % to about 90 wt % of the thermoplastic polyamidoamine-epihalohydrin resin, and about 0.1 wt % to about 30 wt % of the re-wetting agent, and wherein all weight percent values are based on a combined weight of the thermosetting polyamidoamine-epihalohydrin resin, the thermoplastic polyamidoamine-epihalohydrin resin, and the re-wetting agent. 
     
     
         10 . The creping adhesive of  claim 6 , further comprising polyvinyl alcohol, hemicellulose, polyvinyl amine, polyacrylamide, or a mixture thereof. 
     
     
         11 . A method for creping a cellulosic fiber web, comprising:
 applying a creping adhesive to a drying surface, wherein the creping adhesive comprises:
 a thermosetting polyamidoamine-epihalohydrin resin comprising a reaction product of a first epihalohydrin and a first polyamidoamine containing one or more secondary amine groups; and 
 a thermoplastic polyamidoamine-epihalohydrin resin comprising a reaction product of a second epihalohydrin and a second polyamidoamine containing one or more secondary amine groups; 
   adhering a cellulosic fiber web to the drying surface with the creping adhesive; and   dislodging the adhered cellulosic fiber web from the drying surface.   
     
     
         12 . The method of  claim 11 , wherein the thermosetting polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 800,000 to about 1,200,000, and wherein the thermoplastic polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 40,000 to about 200,000. 
     
     
         13 . The method of  claim 11 , wherein a molar ratio of the first polyamidoamine to the first epihalohydrin is about 0.75:1 to about 1.8:1, and wherein a molar ratio of the second polyamidoamine to the second epihalohydrin is about 2:1 to about 100:1. 
     
     
         14 . The method of  claim 11 , wherein the creping adhesive further comprises a re-wetting agent comprising a protonated amine, a protonated polyamine, a quaternary ammonium salt, glycerin, a salt of a polycarboxylic acids neutralized with triethanolamine, or any mixture thereof. 
     
     
         15 . The method of  claim 14 , wherein the creping adhesive comprises about 5 wt % to about 80 wt % of the thermosetting polyamidoamine-epihalohydrin resin, about 15 wt % to about 90 wt % of the thermoplastic polyamidoamine-epihalohydrin resin, and about 0.1 wt % to about 30 wt % of the re-wetting agent, and wherein all weight percent values are based on a combined weight of the thermosetting polyamidoamine-epihalohydrin resin, the thermoplastic polyamidoamine-epihalohydrin resin, and the re-wetting agent. 
     
     
         16 . A creped product, comprising:
 a creped cellulosic fiber web; and   an at least partially cured creping adhesive, wherein, prior to curing, the creping adhesive comprises:
 a thermosetting polyamidoamine-epihalohydrin resin comprising a reaction product of a first epihalohydrin and a first polyamidoamine containing one or more secondary amine groups; and 
 a thermoplastic polyamidoamine-epihalohydrin resin comprising a reaction product of a second epihalohydrin and a second polyamidoamine containing one or more secondary amine groups. 
   
     
     
         17 . The creped product of  claim 16 , wherein the thermosetting polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 800,000 to about 1,200,000, and wherein the thermoplastic polyamidoamine-epihalohydrin resin has a weight average molecular weight of about 40,000 to about 200,000. 
     
     
         18 . The creped product of  claim 16 , wherein a molar ratio of the first polyamidoamine to the first epihalohydrin is about 0.75:1 to about 1.8:1, and wherein a molar ratio of the second polyamidoamine to the second epihalohydrin is about 2:1 to about 100:1. 
     
     
         19 . The creped product of  claim 16 , wherein, prior to curing, the creping adhesive further comprises a re-wetting agent. 
     
     
         20 . The creped product of  claim 19 , wherein the creping adhesive comprises about 5 wt % to about 80 wt % of the first thermosetting polyamidoamine-epihalohydrin resin, about 15 wt % to about 90 wt % of the first thermoplastic polyamidoamine-epihalohydrin resin, and about 0.1 wt % to about 30 wt % of the re-wetting agent, and wherein all weight percent values are based on the combined weight of the thermosetting polyamidoamine-epihalohydrin resin, the thermoplastic polyamidoamine-epihalohydrin resin, and the re-wetting agent.