Use of acrylic graft polymers in the field of collagen-based substrates, and the substrates, skins and leathers thus obtained

Abstract

The invention concerns the technical sector of collagen-based substrates, notably hides, leathers, undressed hides and reconstituted leathers, and more specifically the use of acrylic polymers grafted with one or more proteinic derivatives or natural or synthetic fatty derivatives, together with the smoothing agents consisting of the said grafted acrylic polymers. The invention also concerns collagen-based substrates, notably hides, leathers, undressed hides and reconstituted leathers smoothed using these said grafted acrylic polymers. The invention also concerns leather objects smoothed using these said grafted acrylic polymers.

1 . A method of treating collagen based substrates comprising: 
 applying acrylic polymer grafted with one or more proteinic derivatives or natural or synthetic fatty derivatives to collagen based substrates.    
     
     
         2 . A method as claimed in  claim 1 , wherein said acrylic polymer grafted with one or more proteinic derivatives or natural or synthetic fatty derivatives is a product of radical polymerisation of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic anhydride, 2-acrylamido-2-methyl-1-propane sulfonic acid, 2-methacrylamido-2-methyl-1-propane sulfonic acid, 3-methacrylamido-2-hydroxy-1-propane sulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzene sulfonic acid, methallyloxybenzene sulfonic acid, 2-hydroxy-3-(2-propenyloxy) propane sulfonic acid, 2-methyl-2-propene-1-sulfonic acid, ethylene sulfonic acid, propene sulfonic acid, 2-methyl sulfonic acid, styrene sulfonic acid, salts of styrene sulfonic acid, vinyl sulfonic acid, sodium methallylsulfonate, sulfopropyl acrylate, sulfopropyl methacrylate, sulfomethylacrylamide, sulfomethylmethacrylamide, acrylamide, methylacrylamide, esters of acrylic acid, esters of methacrylic acid, glycol propylene, vinylpyrrolidone, vinylcaprolactam, isobutylene, diisobutylene, vinyl acetate, styrene, alphamethylstyrene, vinylmethylether, and allylics 
 in the presence of one or more of the proteinic derivatives or of the natural or synthetic fatty derivatives selected from the group consisting of neat's foot oil, sheep's foot oil, whale oil, synthetic spermaceti oil, seal oil, tallow, suint grease, olein, stearin, suintin, lanolin, lecithin, phosphatidic acids, cephaline, cholesterols, phytosterols, casein, eel oils, herring oils, shark oil, sardine oil, fish oil, egg yolk, insect wax, carnauba wax, candellila, ricin oil, olive oil, copra, palm kernel oil, groundnut oil, cotton oil, colza oil, almond oil, avocado oil, tung oil, borage oil, cocoa oil, camelia oil, cameline oil, campher oil, carthame oil, chaulmoogra oil, hempseed oil, croton oil, wheat seed oil, corn seed oil, jojoba oil, karite oil, linseed oil, maize oil, marmot oil, menhaden oil, rapeseed oil, hazelnut oil, walnut oil, apricot core oil, poppy oil, oiticica oil, ongokea oil, palm oil, pecan oil, grape pip oil, perilla oil, pine nut oil, pistachio nut oil, acetylated ricin oil, rice oil, sesame oil, soya oil, tortoise oil, sunflower oil, liquid paraffin, mink oil, abietic acid salts of abietic acid, naphthalene sulfonic acid, salts of naphthalene sulfonic acid, formol melamines, glutaric acid, glutamic acid, aspartic acid, butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, elaidic acid, petroselinic acid, lauroleic acid, myristoleic acid, palmitoleic acid, oleic acid, gadoleic acid, erucic acid, linoleic acid, linolenic acid, eleostearic acid, licanic acid, parinaric acid, arachidonic acid, clupanodonic acid, taririric acid, and isanic acid.    
     
     
         3 . The method according to  claim 2 , wherein said at least one monomer is selected from the group consisting of esters of acrylic acid and esters of methacrylic acid, wherein said esters of acrylic acid is alkyloxypolyalkylene glycol acrylate and said esters of methacrylic acid is alkyloxypolyalkylene glycol methacrylate.  
     
     
         4 . The method according to  claim 2 , wherein between 2.5% and 40%, by mass, of the proteinic derivatives or of natural or synthetic derivatives, is present relative to the total quantity of the monomer.  
     
     
         5 . The method according to  claim 1 , wherein 0.8% to 6% by dry weight of acrylic polymers grafted with one or more proteinic derivatives or natural or synthetic fatty derivatives, relative to the weight of the “wet blue” support, is applied.  
     
     
         6 . A smoothing agent wherein said smoothing agent comprises acrylic polymers grafted with one or more proteinic derivatives or natural or synthetic fatty derivatives.  
     
     
         7 . The smoothing agent according to the  claim 6 , wherein said smoothing agent is produced by the radical polymerisation of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic anhydride, 2-acrylamido-2-methyl-1-propane sulfonic acid, 2-methacrylamido-2-methyl-1-propane sulfonic acid, 3-methacrylamido-2-hydroxy-1-propane sulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzene sulfonic acid, methallyloxybenzene sulfonic acid, 2-hydroxy-3-(2-propenyloxy) propane sulfonic acid, 2-methyl-2-propene-1-sulfonic acid, ethylene sulfonic acid, propene sulfonic acid, 2-methyl sulfonic acid, styrene sulfonic acid, salts of styrene sulfonic acid, vinyl sulfonic acid, sodium methallylsulfonate, sulfopropyl acrylate, sulfopropyl methacrylate, sulfomethylacrylamide, sulfomethylmethacrylamide, acrylamide, methylacrylamide, esters of acrylic acid, esters of methacrylic acid, glycol propylene, vinylpyrrolidone, vinylcaprolactam, isobutylene, diisobutylene, vinyl acetate, styrene, alphamethylstyrene, vinylmethylether, and allylics 
 in the presence of one or more of the proteinic derivatives or of the natural or synthetic fatty derivatives selected from the group consisting of neat's foot oil, sheep's foot oil, whale oil, synthetic spermaceti oil, seal oil, tallow, suint grease, olein, stearin, suintin, lanolin, lecithin, phosphatidic acids, cephaline, cholesterols, phytosterols, casein, eel oils, herring oils, shark oil, sardine oil, fish oil, egg yolk, insect wax, carnauba wax, candellila, ricin oil, olive oil, copra, palm kernel oil, groundnut oil, cotton oil, colza oil, almond oil, avocado oil, tung oil, borage oil, cocoa oil, camelia oil, cameline oil, campher oil, carthame oil, chaulmoogra oil, hempseed oil, croton oil, wheat seed oil, corn seed oil, jojoba oil, karite oil, linseed oil, maize oil, marmot oil, menhaden oil, rapeseed oil, hazelnut oil, walnut oil, apricot core oil, poppy oil, oiticica oil, ongokea oil, palm oil, pecan oil, grape pip oil, perilla oil, pine nut oil, pistachio nut oil, acetylated ricin oil, rice oil, sesame oil, soya oil, tortoise oil, sunflower oil, liquid paraffin, mink oil, abietic acid, salts of abietic acid, naphthalene sulfonic acid, salts of naphthalene sulfonic acid, formol melamines, glutaric acid, glutamic acid, aspartic acid, butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, elaidic acid, petroselinic acid, lauroleic acid, myristoleic acid, palmitoleic acid, oleic acid, gadoleic acid, erucic acid, linoleic acid, linolenic acid, eleostearic acid, licanic acid, parinaric acid, arachidonic acid, clupanodonic acid, taririric acid, and isanic acid.    
     
     
         8 . The smoothing agent according to  claim 7 , wherein said at least one monomer is selected from the group consisting of esters of acrylic acid and esters of methacrylic acid, wherein said esters of acrylic acid is alkyloxypolyalkylene glycol acrylate and said esters of methacrylic acid is alkyloxypolyalkylene glycol methacrylate.  
     
     
         9 . The smoothing agent according to  claim 7 , wherein said smoothing agent comprises between 2.5% and 40% by mass the proteinic derivatives or of the natural or synthetic fatty derivatives, relative to the total quantity of the monomers.  
     
     
         10 . A collagen-based substrate comprising the smoothing agent as claimed in  claim 6 .  
     
     
         11 . The collagen-based susbstrate according to  claim 10  wherein said substrate comprises 0.8% to 6% by dry weight of the smoothing agent, relative to the support of the “wet blue” support.  
     
     
         12 . A leather article comprising the smoothing agent as claimed in  claim 6.