Use of a bituminous composition as an adhesive binder

1. Process for bonding a coating to a structure, wherein said process comprises:

providing a bituminous composition comprising at least one acidic additive of general formula (I): R—(COOH)z in which R is a linear or branched, saturated or unsaturated hydrocarbon-based chain comprising from 4 to 68 carbon atoms, and z is an integer ranging from 1 to 4,

applying at least one layer of the bituminous composition to the structure, and

subsequently applying the coating thereon.

2. Process according to claim 1 , wherein the acidic additive is a diacid of general formula HOOC—C w H 2w —COOH in which w is an integer ranging from 4 to 22.

3. Process according to claim 2 , wherein the acidic additive is a diacid chosen from the group formed by adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, 1,2-dodecanedioic acid and tetradecanedioic acid.

4. Process according to claim 1 , wherein said composition comprises from 0.1% to 5% by mass of said acidic additive relative to the total mass of said composition.

5. Process according to claim 1 , wherein said composition comprises at least one olefinic polymer adjuvant functionalized with at least glycidyl functional groups.

6. Process according to claim 5 , wherein the olefinic polymer adjuvant is chosen from the group consisting of:

(a) statistical or block copolymers, of ethylene and of a monomer chosen from glycidyl acrylate and glycidyl methacrylate, comprising from 50% to 99.7% by mass of ethylene;

(b) statistical or block terpolymers, of ethylene, of a monomer A chosen from vinyl acetate and C 1 to C 6 alkyl acrylates or methacrylates and of a monomer B chosen from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by mass of units derived from monomer A and from 0.5% to 15% by mass of units derived from monomer B, the remainder being formed from units derived from ethylene; and

(c) copolymers resulting from the grafting of a monomer B chosen from glycidyl acrylate and glycidyl methacrylate to a substrate consisting of a polymer chosen from polyethylenes, polypropylenes, statistical or block copolymers of ethylene and of vinyl acetate and statistical or block copolymers of ethylene and of a C 1 to C 6 alkyl acrylate or methacrylate, comprising from 40% to 99.7% by mass of ethylene, said grafted copolymers comprising from 0.5% to 15% by mass of grafted units derived from monomer B.

7. Process according to claim 6 , wherein the olefinic polymer adjuvant is chosen from statistical or block terpolymers of ethylene, of a monomer A chosen from vinyl acetate and C 1 to C 6 alkyl acrylates or methacrylates and of a monomer B chosen from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by mass of units derived from monomer A and from 0.5% to 15% by mass of units derived from monomer B, the remainder being formed from units derived from ethylene.

8. Process according to claim 6 , wherein the olefinic polymer adjuvant is chosen from statistical terpolymers of ethylene, of a monomer A chosen from C 1 to C 6 alkyl acrylates or methacrylates and of a monomer B chosen from glycidyl acrylate and glycidyl methacrylate, comprising from 0.5% to 40% by mass of units derived from monomer A and from 0.5% to 15% by mass of units derived from monomer B, the remainder being formed from units derived from ethylene.

9. Process according to claim 5 , wherein said composition comprises from 0.05% to 15% by mass of the olefinic polymer adjuvant relative to the total mass of said composition.

10. Process according to claim 1 , wherein said composition is conditioned in the form of bitumen cakes or in bags made of hot-melt material or in buckets made of hot-melt material.

11. Process according to claim 1 , for bonding coatings for public works, civil engineering works or construction works.

12. Process according to claim 1 , wherein the structure comprises floors and/or walls of buildings.

13. Process according to claim 12 , wherein the process comprises the following successive steps:

heating the bituminous composition to a working temperature of less than 190° C.,

applying the at least one layer of said bituminous composition, with a thickness of between 0.1 and 3 mm, to the floors and/or walls, at an application temperature greater than 100° C. and less than 190° C., and

applying a sealing membrane to the at least one layer of bituminous composition.

14. Process according to claim 12 , wherein the process comprises the following successive steps:

heating the bituminous composition to a working temperature of less than 190° C.,

applying a first layer of said bituminous composition, with a thickness of between 0.1 and 3 mm, at an application temperature greater than 100° C. and less than 190° C.,

inserting expanded glass foam insulating plates onto the first layer so as to cover the floors and/or walls of the building with a uniform insulating coat,

applying a second layer of the bituminous composition with a thickness of between 0.1 and 3 mm, onto the coat of insulating plates, at an application temperature greater than 100° C. and less than 190° C., and

applying a sealing membrane onto the second layer.

15. Process according to claim 12 , wherein the coating is chosen from sealing or insulating coatings or membranes, flame-retardant panels, heat-insulating or sound-insulating panels and expanded glass foam insulating plates.

16. Process according to claim 1 , wherein the process further comprises, after providing the bituminous composition but before applying the at least one layer of the bituminous composition, heating the bituminous composition to a working and application temperature.

17. Process according to claim 16 , wherein the working and application temperature is greater than 100° C.

18. Process according to claim 16 , wherein the working and application temperature is less than 190° C.