Fibre-based support containing a layer of a functionalized water-soluble polymer, method of production and use thereof

Abstract

A cellulose and/or synthetic fibre-based support of which at least one surface is coated with a layer containing at least one water-soluble polymer comprising hydroxyl or primary-secondary amino functional groups, at least some of which have been functionalized beforehand with at least one organic compound comprising at least one epoxy functional group, and at least one R 1 group wherein R 1 is a vinyl functional group or at least one Si(R 2 ) 3 functional group and wherein R 2 =hydrogen atom, hydroxyl, alkoxy, alkyl, and combinations thereof

1 . A cellulose and/or synthetic fibre-based support of which at least one surface is coated with a layer containing at least one water-soluble polymer comprising hydroxyl or primary-secondary amino functional groups, at least some of which have been functionalized beforehand with at least one organic compound;
 wherein said organic compound contains:   at least one epoxy functional group, and   at least one R 1  group wherein R 1  is a vinyl functional group or at least one Si(R 2 ) 3  functional group and wherein R 2 =hydrogen atom, hydroxyl, alkoxy, alkyl, and combinations thereof.   
     
     
         2 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the fibre-based support is a cellulose support. 
     
     
         3 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the water-soluble polymer having hydroxyl functional groups is selected from the group comprising natural and modified polysaccharides such as starch; CMC; alginate; chitosan, pectine, chtin, glycogen, arabinoxylane, cellulose and synthetic polymers such as poly(vinyl alcohol), hydrolysed or partially hydrolysed copolymers of vinyl acetate, which may be obtained for example by hydrolysing ethylene—vinyl acetate (EVA) or vinyl chloride—vinyl acetate, N-vinyl pyrrolidone—vinyl acetate, and maleic anhydride—vinyl acetate copolymers. 
     
     
         4 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the water-soluble polymer having hydroxyl functional groups is starch. 
     
     
         5 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the water-soluble polymer having primary-secondary amino functional groups is selected from the group comprising polyethyleneimine; polyallylamine; chitosan; polyacrylamide; partially or totally hydrolized polyacrylamide; parlially or totally hydrolized polyvinylamine and polyamines based on amino-ethyl-piperazine. 
     
     
         6 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the organic molecule corresponds to any of the following formulae:
   H 2 C —O— CH-(R)—CH═CH 2  
     H 2 C —O— CH—(R)—Si—(R 2 ) 3  
   
       wherein R=linear, branched and/or cyclic carbon chain or polydimethylsiloxane chain that may contain heteroatoms, and R 2 =hydrogen atom, hydroxyl, alkoxy, alkyl, and combinations thereof. 
     
     
         7 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein said organic molecule is preferably one of the following molecules: 2-vinyloxyrane, 1,2-epoxy-4-pentene 1,2-epoxy-5-hexene, 1,2-epoxy-6-heptene, 1,2-epoxy-7-octene, 1,2-epoxy-8-nonene, 1,2-epoxy-9-decene, 1,2-epoxy-10-undecene, 1-allyloxy-2,3-epoxypropane, 1-allyloxy-3,4-epoxybutane, 1-allyloxy-2,3-epoxypentane, 1-allyloxy-2,3-epoxyhexane, 1-allyloxy-2,3-epoxyheptane, 1-allyloxy-2,3-epoxyoctane, 1-allyloxy-2,3-epoxynonane, 1-allyloxy-2,3-epoxydecane, 1-allyloxy-2,3-epoxyundecane, glycidoxypropyl trimethoxysilane, glycidoxypropyl triethoxysilane, glycidoxypropyl trisiloxane. 
     
     
         8 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein said organic molecule represents between 0.1 and 20% by weight of the water-soluble polymer, preferably 1%. 
     
     
         9 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the functionalized water-soluble polymer accounts for at least 1% by weight of the layer coated onto the fibre-based support, advantageously between 20 and 100%. 
     
     
         10 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the layer coated onto the fibre-based support is deposited in a quantity of 0.2 to 20 g/m 2 , preferably 1 g/m 2 . 
     
     
         11 . The cellulose and/or synthetic fibre-based support as recited in  claim 1 , wherein the weight of the fibres ranges from 30 to 160 g/m 2 , advantageously from 55 to 140 g/m 2 , and preferably in the order of 58 g/m 2 . 
     
     
         12 . A method for producing a cellulose and/or synthetic fibre-based support as recited in  claim 1 , comprising the following steps:
 formation of a cellulose and/or synthetic fibre-based sheet with or without a parchementizing process;   functionalization of a least one water-soluble polymer comprising hydroxyl or primary-secondary amino functional groups by grafting at least one organic molecule comprising at least one epoxy group and at least one R 1  functional group wherein R 1  can be chosen from a vinyl group, or at least one —Si(R 2 ) 3  functional group and wherein R 2 ═hydrogen atom, hydroxyl, alkoxy, alkyl, and combinations thereof;   coating the cellulose and/or synthetic fibre-based support with at least one functionalized water-soluble polymer;   calendering or supercalendering of the support if required.   
     
     
         13 . The method as recited in  claim 11 , wherein the organic molecule is prepared from a chloro-hydrin precursor. 
     
     
         14 . The method as recited in  claim 11 , wherein the water-soluble polymer is functionalized at a temperature between 20 and 95° C., preferably between 80 and 95° C., in an aqueous medium and eventually in the presence of an organic or inorganic acid or base. 
     
     
         15 . The method as recited in  claim 11 , wherein the coating techniques include size-press, metering-size-press, foulard coating, rod coating, “Champion” bar coating, “Meyer” bar coating, air-knife coating, gravure coating, scraper blade coating, sliding blade coating, single- and multilayer curtain coating, reverse roll coating, spray coating, atomisation coating, liquid application system (LAS) coating, kiss coating, foam coating, and any surface coating application process. 
     
     
         16 . The method as recited in  claim 11 , wherein the coating of the cellulose and/or synthetic fibre-based support is carried out at a temperature between 20 and 95° C., preferably between at 50 and 70° C. 
     
     
         17 . Use of the cellulose and/or synthetic fibre-based support as recited in  claim 1  for siliconization.