Adhesion-Promoting Agent for a Thermal Insulation Surface

Abstract

The present invention relates to a novel agent for promoting adhesion to a heat-insulating surface and in particular to a polystyrene surface, especially when wet or under the effect of a large variation in temperature. The invention also relates to the use of the said agent in a water-insoluble film-forming polymer composition or in a mineral binder composition for applications in the construction field and more particularly in external heat-insulation systems.

1 . An adhesion promoting agent comprising a a phosphate monoester, diester or triester represented by the formula: 
         O═P(OR1)(OR2)(OR3) wherein R1, R2 and R3, may be the same or different and are a hydrogen atom, a linear, branched or cyclic, saturated or unsaturated alkyl radical containing from 1 to 22 carbon atoms, optionally substituted with halogen atoms, hydroxyl groups, ether groups containing between 1 and 12 carbon atoms, thioether groups, ester groups, amide groups, carboxyl groups, sulfonic acid groups, carboxylic anhydride groups, carbonyl groups, an aryl radical containing from 6 to 22 carbon atoms, optionally substituted with halogen atoms, provided however that at least one of R1, R2 or R3 not a hydrogen atom.    
     
     
         2 . Agent according to  claim 1 , characterized in that the said phosphate monoester, diester or triester is a compound of formula (I) below: 
         O═P(OR1)(OR2)(OR3)  (I) 
       in which: 
 R1, R2 and R3, which may be identical or different, represent: 
 a hydrogen atom, or  
 a linear, branched or cyclic, saturated or unsaturated alkyl radical containing from 1 to 22 carbon atoms, preferably from 2 to 12 carbon atoms and even more preferentially from 2 to 8 carbon atoms, optionally substituted with halogen atoms, such as fluorine or chlorine, hydroxyl groups, ether groups containing between 1 and 12 carbon atoms and preferably between 1 and 6 carbon atoms, thioether groups, ester groups, amide groups, carboxyl groups, sulfonic acid groups, carboxylic anhydride groups and/or carbonyl groups, or  
 an aryl radical containing from 6 to 22 carbon atoms and preferably from 6 to 8 carbon atoms, optionally substituted with halogen atoms, such as fluorine or chlorine, hydroxyl groups, ether groups containing between 1 and 12 carbon atoms and preferably between 1 and 6 carbon atoms, thioether groups, ester groups, amide groups, carboxyl groups, sulfonic acid groups, carboxylic anhydride groups and/or carbonyl groups,  
 
 it being understood that at least one of the substituents R1, R2 or R3 is other than a hydrogen atom.  
 
     
     
         3 . The adhesion promoting agent of  claim 1  wherein the phosphate monoester, diester or triester of formula (I) is selected from the group consisting of tris(2-ethylhexyl)phosphate, tris(2-butoxyethyl)phosphate, di(2-ethylhexyl)phosphate, mono(2-ethylhexyl)phosphate, tris(2-isooctyl)phosphate, tricresyl phosphate, cresyl diphenyl phosphate, trixylyl phosphate, triphenyl phosphate, tributyl phosphate, triethyl phosphate, tris(2-chloroethyl)phosphate, and combinations thereof.  
     
     
         4 . The adhesion promoting agent of  claim 1  wherein the phosphate monoester, diester or triester is adsorbed onto an inert mineral support selected from the group consisting of silica, alumina, silica-alumina, sodium silicoaluminate, calcium silicate, magnesium silicate, zirconia, magnesium oxide, calcium oxide, cerium oxide and titanium oxide.  
     
     
         5 . A Water-insoluble film-forming polymer composition comprising the phosphate monoester, diester or triester of  claim 1 .  
     
     
         6 . The Water-insoluble film-forming polymer composition of  claim 5  wherein the composition is in the form of an aqueous dispersion (latex) or is in the form of a redispersible latex powder.  
     
     
         7 . The Water-insoluble film-forming polymer composition of  claim 6  wherein the phosphate monoester, diester or triester is present in an amount between 0.02% and 25% by weight relative to the weight of the latex powder.  
     
     
         8 . The Water-insoluble film-forming polymer composition of  claim 7  wherein the phosphate monoester, diester or triester is present in an amount between 1% and 5% by weight relative to the weight of the latex powder.  
     
     
         9 . The Water-insoluble film-forming polymer composition of  claim 5  wherein the polymer composition is obtained by polymerization of monomers selected from the group consisting of vinyl esters of branched or unbranched, saturated monocarboxylic acids containing from 1 to 16 carbon atoms, alkyl acrylates and methacrylates, the alkyl group of which contains from 1 to 10 carbon atoms, vinylaromatic monomers, wherein the monomers are copolymerized with each other or with other ethylenically unsaturated monomers.  
     
     
         10 . (canceled)  
     
     
         11 . A mineral binder composition comprising the phosphate monoester, diester or triester of  claim 1 .  
     
     
         12 . The composition of  claim 11  wherein the mineral binder is a hydraulic binder selected from the group consisting of cements, aluminous or blast-furnace type, fly ash, calcined shales and pozzolans and wherein the amount of phosphate monoester, diester or triester is between 0.01% and 50% by dry weight of phosphate monoester, diester or triester relative to the total weight of the composition.  
     
     
         13 . The composition of  claim 12  wherein the amount of phosphate monoester, diester or triester is between 0.02% and 2% by dry weight of the phosphate monoester, diester or triester relative to the total weight of the composition.  
     
     
         14 . (canceled)