Mineral fibre board

Abstract

A high density mineral fibre board having a formaldehyde free binder has acceptable strength and good dimensional stability.

1 .- 12 . (canceled) 
     
     
         13 . A mineral fiber insulating board having a density in a range from about 100 to about 200 kg/m 3  comprising mineral fibers and an organic, formaldehyde free binder,
 wherein the mineral fiber insulating board has:   a) an ordinary compression strength of at least about 60 kPa; and   b) a weathered compression strength of at least about 25 kPa; and   c) a change in thickness of less than about 6% after autoclave.   
     
     
         14 . The mineral fiber insulating board of  claim 13 , wherein the ordinary compression strength is at least about 70 kPa. 
     
     
         15 . The mineral fiber insulating board of  claim 13 , wherein the weathered compression strength is at least about 30 kPa. 
     
     
         16 . The mineral fiber insulating board of  claim 13 , wherein the change in thickness after autoclave is less than about 5%. 
     
     
         17 . The mineral fiber insulating board of  claim 13 , wherein the fibers are rock wool mineral fibers. 
     
     
         18 . The mineral fiber insulating board of  claim 13 , wherein the mineral fiber insulating board comprises from about 0.5% to about 5% of organic, formaldehyde free binder by weight. 
     
     
         19 . The mineral fiber insulating board of  claim 13 , wherein the organic, formaldehyde free binder comprises a product of a reaction including a reducing sugar. 
     
     
         20 . The mineral fiber insulating board of  claim 13 , wherein the organic, formaldehyde free binder comprises at least one Maillard reaction product. 
     
     
         21 . The mineral fiber insulating board of  claim 13 , wherein the organic, formaldehyde fee binder comprises a product of curing an aqueous solution comprising citric acid, ammonia and dextrose. 
     
     
         22 . The mineral fiber insulating board of  claim 13 , wherein the density is from about 130 to about 190 kg/m 3 . 
     
     
         23 . The mineral fiber insulating board of  claim 13 , wherein the mineral fiber insulating board is adapted for a use selected from a group consisting of a fire barrier, fire protection, cladding for buildings, ceiling tiles, a roof board, thermal insulation for high temperature machinery, and foundation walls for basements. 
     
     
         24 . A method of manufacturing a mineral fiber insulating board comprising
 applying an aqueous binder solution to a plurality of mineral fibers, dehydrating the aqueous binder solution such that a substantially dehydrated binder is disposed on the plurality of mineral fibers and curing the substantially dehydrated binder, wherein   a) the mineral fiber insulating board has a density from about 100 to about 200 kg/m 3 ,   b) the mineral fiber insulating board has an ordinary compression strength of at least about 60 kPa,   c) the mineral fiber insulating board has a weathered compression strength of at least about 25 kPa, and   d) the mineral fiber insulating board a change in thickness of less than 6% after autoclave, and   e) the aqueous binder solution is formaldehyde free.