Fire-protecting insulation product and use of such product

A fire-protecting insulation product comprising:

• air-laid mineral wool fibres;
• a binder, said binder being the result of curing a binder composition comprising:
• at least one hydrocolloid comprising gelatin;
• and
• a tannin, an enzyme, or both a tannin and an enzyme, wherein:
• the tannin is selected from the group consisting of tannic acid, condensed tannins (proanthocyanidins), hydrolysable tannins, gallotannins, ellagitannins, complex tannins, and tannin originating from one or more of oak, chestnut, staghorn sumac, fringe cups, and combinations thereof;
• and
• the enzyme is selected from the group consisting of transglutaminase (EC 2.3.2.13), protein disulfide isomerase (EC 5.3.4.1), thiol oxidase (EC 1.8.3.2), polyphenol oxidase (EC 1.14.18.1), lysyl oxidase (EC 1.4.3.13), and peroxidase (EC 1.11.1.7);
• and
• a particulate endothermic material selected from the group consisting of gypsum, magnesium hydroxide, hydromagnesite, aluminium hydroxide, and aluminium trihydroxide;
• wherein the binder composition is cured at a curing temperature of from 5 to 95° C.;
• wherein the binder composition has a pH of 7 to 10;
• wherein the binder has a 3-point bending strength of at least 0.18 kN, measured in accordance with a Mechanical Strength Bar Test, unaged condition;
• and
• wherein the fire-protecting insulation product comprises the mineral wool fibres wherein the fibers are blown into a forming chamber and, while airborne and while still hot, are sprayed with the binder composition and randomly deposited as a mat or web onto a traveling conveyor, the randomly deposited mineral wool fibres then being transferred to a curing oven where the binder composition is cured into the binder by air blown through the randomly deposited mineral wool fibres, thereby binding the mineral wool fibres together.