Adhesion-promoting agent for a thermal insulation surface

An article of construction comprising a heat-insulating material adhered to a mineral building material and an adhesion promoting agent comprising a phosphate monoester, diester, trimester, or a mixture thereof, and the phosphate monoester, diester, or trimester is 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, and at least one of R1, R2 or R3 is not a hydrogen atom, and wherein the adhesion promoting agent 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.