US 11,814,761 B2
Process for producing mineral wool
Marie Savonnet, Paris (FR); Victor Maruani, Villeurbanne (FR); Eric Framery, Lyons (FR); and Bruno Andrioletti, Miribel (FR)
Assigned to SAINT-GOBAIN ISOVER, Courbevoie (FR)
Appl. No. 16/771,354
Filed by SAINT-GOBAIN ISOVER, Courbevoie (FR)
PCT Filed Dec. 10, 2018, PCT No. PCT/FR2018/053165
§ 371(c)(1), (2) Date Jun. 10, 2020,
PCT Pub. No. WO2019/115920, PCT Pub. Date Jun. 20, 2019.
Claims priority of application No. 1762029 (FR), filed on Dec. 13, 2017.
Prior Publication US 2020/0340156 A1, Oct. 29, 2020
Int. Cl. C03C 25/00 (2018.01); D04H 1/587 (2012.01); C03C 13/06 (2006.01); C03C 25/26 (2018.01); C03C 25/321 (2018.01); C03C 25/34 (2006.01); C09D 5/00 (2006.01); D04H 1/4218 (2012.01)
CPC D04H 1/587 (2013.01) [C03C 13/06 (2013.01); C03C 25/26 (2013.01); C03C 25/321 (2013.01); C03C 25/34 (2013.01); C09D 5/00 (2013.01); D04H 1/4218 (2013.01); C03C 2213/00 (2013.01)] 14 Claims
 
1. A process for producing insulating products based on mineral fibers, the process comprising:
diluting a first binder composition with water, to obtain a second binder composition having a solids content of between 3 and 7% by weight,
wherein the first binder composition comprises:
(a) from 50% to 85% by weight of water;
(b) from 10% to 45% by weight of a saccharide component comprising sucrose; and
(c) from 3% to 15% by weight of one or more ammonium salts or primary amine salts of an acid;
applying the second binder composition to mineral fibers;
forming an assembly of mineral fibers coated with the second binder composition; and
heating the assembly of coated mineral fibers so as to form an assembly of mineral fibers bound by an insoluble binder,
wherein the first binder composition has a pH of less than 5.5,
wherein the ammonium salt or primary amine salt is a salt of strong acid or a salt of an acid having a pKa of less than or equal to 2.2, and
wherein the first and second binder compositions are devoid of salts of weak acids having at least a pKa of between 2.5 and 6.9.