Use of an aqueous dispersion of at least one biodegradable polymer containing at least one stabilizing agent for the preparation of an aqueous filmogenic composition

Abstract

The invention relates to the preparation of an aqueous filmogenic composition wherein dry matter, which is at least equal to 35%, for, is used in addition to an aqueous dispersion consisting of an organic phase dispersed in a dispersing aqueous phase, said dispersion containing, in relation to the dry matter, 94-99.5% dry organic phase comprising at least one biodegradable polymer, and 0.5-6% of at least one stabilizing agent.

1 - 13 . (canceled)  
   
   
       14 . A method for forming a film, comprising the steps of 
 a) preparing an aqueous film-forming composition with a solids content at least equal to 30%, 
 wherein said aqueous film-forming composition comprises an aqueous dispersion composed of an organic phase dispersed in a dispersing aqueous phase,  
 wherein said dispersion comprises, with respect to its solids content: 
 from 94 to 99.5% on a dry basis of organic phase comprising at least one biodegradable polymer, and  
 from 0.5 to 6% of at least one stabilizing agent; and  
 
   b) applying said aqueous film-forming composition onto a support.    
   
   
       15 . The method as claimed in  claim 14  wherein the film-forming composition exhibits a solids content at least equal to 35% by weight on a dry basis.  
   
   
       16 . The method as claimed in  claim 14 , wherein the film-forming composition exhibits a solids content of between 45 and 99.9% by weight on a dry basis.  
   
   
       17 . The method as claimed in  claim 14 , wherein the film-forming composition exhibits a solids content of between 50′ and 75% by weight on a dry basis.  
   
   
       18 . The method as claimed in  claim 14  wherein the aqueous film-forming composition is an aqueous pigment composition or an aqueous adhesive composition.  
   
   
       19 . The method as claimed in  claim 14 , wherein the aqueous dispersion is devoid of volatile organic compounds.  
   
   
       20 . The method as claimed in  claim 14 , wherein the dispersed organic phase constituent of said aqueous dispersion comprises: 
 at least one viscosity-reducing agent exhibiting a solubility parameter of between 15 and 28 (J.cm −3 ) 0.5 , and a hydrogen bond parameter δH of between 3.5 and 15 (J.cm −3 ) 0.5  and    at least one biodegradable polymer in a polymer/viscosity-reducing agent of weight ratio 99.8/0.2 to 60/40.    
   
   
       21 . The method as claimed in  claim 14 , wherein the dispersed organic phase constituent of said aqueous dispersion comprises: 
 at least one viscosity-reducing agent exhibiting a solubility parameter of between 16 and 23 (J.cm −3 ) 0.5 , and a hydrogen bond parameter δH of between 4 and 13 (J.cm −3 ) 0.5 , and    at least one biodegradable polymer in a polymer/viscosity-reducing agent of weight ratio of between 97/3 and 70/30.    
   
   
       22 . The method as claimed in  claim 14 , wherein the dispersed organic phase constituent of said aqueous dispersion comprises: 
 at least one viscosity-reducing agent exhibiting a solubility parameter of between 18 and 21 (J.cm −3 ) 0.5 , and a hydrogen bond parameter δH of between 5 and 10 (J.cm −3 ) 0.5 , and    at least one biodegradable polymer in a polymer/viscosity-reducing agent of weight ratio of between 92/8 and 70/30.    
   
   
       23 . The method as claimed in  claim 14 , wherein the aqueous dispersion is of bacterial origin and exhibits between 1 and 5%, of stabilizing agents.  
   
   
       24 . The method as claimed in  claim 14 , wherein the aqueous dispersion is of bacterial origin and exhibits between 1 and 4% of stabilizing agents.  
   
   
       25 . The method as claimed in  claim 14 , wherein the aqueous dispersion comprises a noncrystallizable biodegradable polymer.  
   
   
       26 . The method as claimed in  claim 17 , wherein the noncrystallizable biodegradable polymer is selected from the group consisting of biodegradable polymers of the following types: polylactates (or PLA), polymalates (or PMA), polyhydroxyalkanoates (or PHA), polycaprolactones (or PCL), polyesteramides (PEA), aliphatic copolyesters (PBSA) and aliphatic-co-terephthalate copolyesters (PBAT), and celluloses or starches which are highly acetylated or rendered hydrophobic by introduction of fixed fatty chains, taken alone or in combination, in the form of homopolymers or heteropolymers, whether linear, branched, crosslinked, dendritic or grafted.  
   
   
       27 . The method as claimed in  claim 14 , wherein the stabilizing agent is selected from the group consisting of proteins, starches, polyvinyl alcohols, gums, polymeric emulsifiers, celluloses and polyols, in their native or modified form, taken alone or in combination.  
   
   
       28 . The method as claimed in  claim 14 , wherein the aqueous film-forming composition thus obtained is intended for the preparation of pigment coating colors, aqueous film-forming pigment preparations and water paints.  
   
   
       29 . The method as claimed in  claim 14 , wherein the aqueous film-forming composition is intended for the preparation of aqueous adhesive compositions, in particular an adhesive for labeling, for spiral mandrels, for corrugated board, for bag manufacture, for wallpaper, for carpets, including fitted carpets, for lining, for nonwoven materials, for cigarettes, wall, a textile finish, a varnish, a composition for temporary protection, a composition for combating graffiti, a coating composition or a waterproofing composition.  
   
   
       30 . An aqueous dispersion composed of an organic phase dispersed in a dispersing aqueous phase, which exhibits: 
 a solids content of between 25 and 70% by weight and,    with respect to its solids content, from 95 to 99.5% on a dry basis of organic phase comprising at least one biodegradable polymer, and from 0.5 to 5% of at least one stabilizing agent.    
   
   
       31 . An aqueous dispersion composed of an organic phase dispersed in a dispersing aqueous phase, which exhibits: 
 a solids content of between 35 and 70% by weight, and,    with respect to its solids content, from 95 to 99.5% on a dry basis of organic phase comprising at least one biodegradable polymer, and from 0.5 to 5% of at least one stabilizing agent.    
   
   
       32 . An aqueous dispersion composed of an organic phase dispersed in a dispersing aqueous phase, which exhibits: 
 a solids content of between 45 and 65% by weight, and,    with respect to its solids content, from 95 to 99.5% on a dry basis of organic phase comprising at least one biodegradable polymer, and from 0.5 to 5% of at least one stabilizing agent.    
   
   
       33 . An aqueous pigment composition, which comprises an aqueous dispersion as claimed in  claim 30 .  
   
   
       34 . An aqueous adhesive composition, which comprises an aqueous dispersion as claimed in claims  30 .  
   
   
       35 . An aqueous pigment composition, which comprises an aqueous dispersion as claimed in  claim 31 .  
   
   
       36 . An aqueous pigment composition, which comprises an aqueous dispersion as claimed in  claim 32 .  
   
   
       37 . An aqueous adhesive composition, which comprises an aqueous dispersion as claimed in claims  31 .  
   
   
       38 . An aqueous adhesive composition, which comprises an aqueous dispersion as claimed in claims  32 .