US2002096288A1PendingUtilityA1

Stabilizer for creping adhesives

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Assignee: HERCULES INCPriority: Aug 17, 1998Filed: Jul 13, 2001Published: Jul 25, 2002
Est. expiryAug 17, 2018(expired)· nominal 20-yr term from priority
Inventors:Anthony J. Allen
C08L 79/02C08L 1/284D21H 21/146C08L 5/00C08L 1/286C08K 3/32D21H 17/72C08L 3/02D21H 21/14
45
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Claims

Abstract

Composition comprising at least one water soluble polymer, such as polyamidoamine-epichlorohydrin resin, polyamine-epichlorohydrin resin, polyvinyl alcohol, etc. and at least one stabilizer, such as hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, etc. and salts thereof, suitable as creping adhesive for paper.

Claims

exact text as granted — not AI-modified
1 . An aqueous composition comprising at least one water soluble polymer comprising polyamidoamine-epichlorohydrin resin, polyamine-epichlorohydrin resin, polyvinyl alcohol, polyvinylamine, polyethyleneimine, polyacrylamide, polymethacrylamide, poly(acrylic acid), poly(methacrylic acid), poly(hydroxyethyl acrylate), poly(hydroxyethyl methacrylate), poly(n-vinylpyrrolidinone), poly(ethylene oxide), hydroxyethyl cellulose, hydroxypropyl cellulose, guar gum, starch, agar, chitosan, alginic acid, carboxymethyl cellulose, highly branched polyamidoamines and their reaction product with epichlorohydrin and silyl-linked polyamidoamines; and at least one stabilizer present in an amount effective to stabilize the water soluble polymer against thermooxidative degradation, said at least one stabilizer comprising hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid and salts of any of these acids.  
     
     
         2 . The composition of  claim 1  wherein the at least one water soluble polymer comprises at least one of polyamidoamine-epichlorohydrin resin, polyamine-epichlorohydrin resin, highly branched polyamidoamines, silylated polyamidoamines, polyvinyl alcohol, polyvinylamine, polyethyleneimine, acrylamide polymers, poly(N-vinypyrrolidinone), hydroxyethylcellulose and carboxymethylcellulose.  
     
     
         3 . The composition of  claim 1  wherein the at least one stabilizer comprises at least one of hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid, sodium hypophosphite, potassium hypophosphite, lithium hypophosphite, calcium hypophosphite, manganese hypophosphite, magnesium hypophosphite, ammonium hypophosphite, phosphorous acid sodium salt, phosphorous acid potassium salt, phosphorous acid lithium salt, phosphorous acid calcium salt, phosphorous acid magnesium salt, phosphorous acid manganese salt and phosphorous acid ammonium salt.  
     
     
         4 . The composition of  claim 1  wherein the at least one water soluble polymer is present in an amount of at least about 25% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         5 . The composition of  claim 1  wherein the at least one water soluble polymer is present in an amount of up to about 99.99% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         6 . The composition of  claim 1  wherein the at least one stabilizer is present in an amount of at least about 0.01 % based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         7 . The composition of  claim 1  wherein the at least one stabilizer is present in an amount of up to about 75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         8 . The composition of  claim 2  wherein the at least one stabilizer comprises at least one of hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid, sodium hypophosphite, potassium hypophosphite, lithium hypophosphite, calcium hypophosphite, manganese hypophosphite, magnesium hypophosphite, ammonium hypophosphite, phosphorous acid sodium salt, phosphorous acid potassium salt, phosphorous acid lithium salt, phosphorous acid calcium salt, phosphorous acid magnesium salt, phosphorous acid manganese salt and phosphorous acid ammonium salt, the at least one water soluble polymer is present in an amount of from about 25 to about 99.99% based upon total weight of said at least one water soluble polymer and said at least one stabilizer, and the at least one stabilizer is present in an amount of at least about 0.01 to about 75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         9 . The composition of  claim 8  wherein the at least one water soluble polymer comprises at least one of polyamidoamine-epichlorohydrin resin, polyamine-epichlorohydrin resin, highly branched polyamidoamines, silylated polyamidoamines, polyvinyl alcohol, polyvinylamine and polyethyleneimine.  
     
     
         10 . The composition of  claim 8  wherein the at least one stabilizer comprises at least one of hypophosphorous acid, phosphorous acid, sodium hypophosphite, potassium hypophosphite, manganese hypophosphite, ammonium hypophosphite, phosphorous acid sodium salt, phosphorous acid potassium salt and phosphorous acid ammonium salt.  
     
     
         11 . The composition of  claim 8  wherein the at least one water soluble polymer is present in an amount of at least about 50% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         12 . The composition of  claim 8  wherein the at least one water soluble polymer is present in an amount of up to about 99.75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         13 . The composition of  claim 8  wherein the at least one stabilizer is present in an amount of at least about 0.25% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         14 . The composition of  claim 8  wherein the at least one stabilizer is present in an amount of up to about 75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         15 . The composition of  claim 9  wherein the at least one stabilizer comprises at least one of hypophosphorous acid, phosphorous acid, sodium hypophosphite, potassium hypophosphite, manganese hypophosphite, ammonium hypophosphite, phosphorous acid sodium salt, phosphorous acid potassium salt and phosphorous acid ammonium salt, the at least one water soluble polymer is present in an amount of from about 50 to about 99.75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer, and the at least one stabilizer is present in an amount of from about 0.25 to about 75% based upon total weight of said at least one water soluble polymer and said at least one stabilizer.  
     
     
         16 . A drying surface for a fibrous web including on said surface a creping adhesive comprising the composition of  claim 1 .  
     
     
         17 . A drying surface for a fibrous web including on said surface a creping adhesive comprising the composition of  claim 8 .  
     
     
         18 . A drying surface for a fibrous web including on said surface a creping adhesive comprising the composition of  claim 15 .  
     
     
         19 . The drying surface according to  claim 16  wherein the composition includes at least one of release agent, surfactant, dispersant, bases and acids and salts other than hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid and salts thereof.  
     
     
         20 . The drying surface according to  claim 17  wherein the composition includes at least one of release agent, surfactant, dispersant, bases and acids and salts other than hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid and salts thereof.  
     
     
         21 . The drying surface according to  claim 18  wherein the composition includes at least one of release agent, surfactant, dispersant, bases and acids and salts other than hypophosphorous acid, phosphorous acid, hypodiphosphoric acid, diphosphorous acid, hypophosphoric acid, pyrophosphorous acid and salts thereof.  
     
     
         22 . A process of forming creped paper comprising: 
 (a) applying the water soluble polymer and stabilizer of the composition of  claim 1  either separately or combined to a drying surface for fibrous web;    (b) pressing a fibrous web against the drying surface to adhere the fibrous web to the drying surface; and    (c) dislodging the fibrous web from the drying surface with a creping device to crepe the fibrous web.    
     
     
         23 . A process of forming creped paper comprising: 
 (a) applying the water soluble polymer and stabilizer of the composition of  claim 8  either separately or combined to a drying surface for fibrous web;    (b) pressing a fibrous web against the drying surface to adhere the fibrous web to the drying surface; and    (c) dislodging the fibrous web from the drying surface with a creping device to crepe the fibrous web.    
     
     
         24 . A process of forming creped paper comprising: 
 (a) applying the water soluble polymer and stabilizer of the composition of  claim 15  either separately or combined to a drying surface for fibrous web;    (b) pressing a fibrous web against the drying surface to adhere the fibrous web to the drying surface; and    (c) dislodging the fibrous web from the drying surface with a creping device to crepe the fibrous web.    
     
     
         25 . The process of  claim 22  wherein the water soluble polymer and stabilizer are applied combined to the drying surface.  
     
     
         26 . The process of  claim 23  wherein the water soluble polymer and stabilizer are applied combined to the drying surface.  
     
     
         27 . The process of  claim 24  wherein the water soluble polymer and stabilizer are applied combined to the drying surface.

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