Bonding composition for mineral wool based on reducing saccharide and hydrogenated saccharide, and insulating products obtained

An acoustic and/or thermal insulation product based on mineral wool bonded by means of a bonding composition comprising:

• at least one reducing saccharide,
• at least one hydrogenated saccharide selected from the group consisting of erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, cellobitol, palatinitol, maltotritol and a hydrogenation product of starch hydrolysate,
• at least one polyfunctional crosslinking agent selected from the group consisting of an organic polycarboxylic acid or a salt thereof, a anhydride and a polyaldehyde, and
• a polyol different from the at least one reducing saccharide and the at least one hydrogenated saccharide, said polyol being in a proportion which varies from 0 to 20 parts calculated on the basis of 100 parts by total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent,
• wherein the at least one reducing saccharide and the at least one hydrogenated saccharide represent 40 to 90% of the total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent.

A mat of mineral fibres bonded by means of the bonding composition comprising:

• at least one reducing saccharide,
• at least one hydrogenated saccharide selected from the group consisting of erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, cellobitol, palatinitol, maltotritol and a hydrogenation product of starch hydrolysate,
• at least one polyfunctional crosslinking agent selected from the group consisting of an organic polycarboxylic acid or a salt thereof, a anhydride and a polyaldehyde, and
• a polyol different from the at least one reducing saccharide and the at least one hydrogenated saccharide, said polyol being in a proportion which varies from 0 to 20 parts calculated on the basis of 100 parts by total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent,
• wherein the at least one reducing saccharide and the at least one hydrogenated saccharide represent 40 to 90% of the total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent.

A method of manufacturing an acoustic and/or thermal insulation product based on mineral wool or of a mat of mineral fibres, the method comprising:

• projecting a bonding composition onto said wool or said fibres;
• and
• treating said wool or said fibres at a temperature permitting crosslinking of the bonding composition and formation of an infusible binder, wherein the bonding composition comprises
• at least one reducing saccharide,
• at least one hydrogenated saccharide selected from the group consisting of erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, palatinitol, maltotritol and a hydrogenation product of starch hydrolysate,
• at least one polyfunctional crosslinking agent selected from the group consisting of an organic polycarboxylic acid or a salt thereof, a anhydrides and a polyaldehyde, and
• a polyol different from the at least one reducing saccharide and the at least one hydrogenated saccharide, said polyol being in a proportion which varies from 0 to 20 parts calculated on the basis of 100 parts by total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent,
• wherein the at least one reducing saccharide and the at least one hydrogenated saccharide represent 40 to 90% of the total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent.

An acoustic and/or thermal insulation product based on mineral wool bonded by means of a bonding composition consisting essentially of:

• at least one reducing saccharide,
• at least one hydrogenated saccharide selected from the group consisting of erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, cellobitol, palatinitol, maltotritol and a hydrogenation product of starch hydrolysate,
• at least one polyfunctional crosslinking agent selected from the group consisting of an organic polycarboxylic acid or a salt thereof, a anhydride and a polyaldehyde, and
• at least one optional additive selected from the group consisting of silane, oil, urea, silicone and an extender selected from derivatives of lignin, and animal or vegetable proteins, the at least one optional additive in the following proportion calculated on the basis of 100 parts by total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent:
• 0 to 2 parts of silane,
• 0 to 20 parts of oil,
• 0 to 30 parts of urea,
• 0 to 5 parts of a silicone,
• 0 to 30 parts of extender,
• wherein the at least one reducing saccharide and the at least one hydrogenated saccharide represent 10 to 90% of the total weight of the mixture consisting of the at least one reducing saccharide, the at least one hydrogenated saccharide and the at least one polyfunctional crosslinking agent.