Mineral fibre insulation

Abstract

A mineral wool insulating product having improved off gassing characteristics is particularly adapted for high temperature applications.

1 .- 19 . (canceled) 
   
   
       20 . A mineral fiber insulating material comprising mineral fibers bound by at least about 0.5% by weight of an organic binder, wherein an initial heating of the mineral fiber insulating material to a temperature of 2000 degrees C. off-gases a mixture of gases comprising predominately ketones. 
   
   
       21 . The mineral fiber insulating material of  claim 20 , wherein the mixture of gases further includes furans. 
   
   
       22 . The mineral fiber insulating material of  claim 20 , wherein the mineral fiber insulating material has a dust level of less than or equal to 20 g/m 3 . 
   
   
       23 . The mineral fiber insulating material of  claim 20 , wherein the mixture of gases includes less than about 30 mg/kg of formaldehyde. 
   
   
       24 . The mineral fiber insulating material of  claim 20 , wherein the mixture of gases comprises less than about 15 mg/kg of formaldehyde. 
   
   
       25 . The mineral fiber insulating material of  claim 20 , wherein the mixture of gases have an odor characteristic of baking. 
   
   
       26 . The mineral fiber insulating material of  claim 20 , wherein the mineral fiber insulating material has a recovered thickness of at least about 100% measured in accordance with Annex A of British standard BS EN 823:1995. 
   
   
       27 . The mineral fiber insulating material of  claim 20 , wherein the mineral fiber insulating material has an ordinary parting strength of at least about 100 g/g. 
   
   
       28 . The mineral fiber insulating material of  claim 20 , wherein the mineral fiber insulating material has a weathered parting strength of at least about 80 g/g. 
   
   
       29 . The mineral fiber insulating material of  claim 20 , wherein the mineral fibers are bound by less than about 10% by weight of the organic binder. 
   
   
       30 . The mineral fiber insulating material of  claim 20 , wherein the mineral fibers are bound by between about 1.5% and about 8% by weight of the organic binder. 
   
   
       31 . The mineral fiber insulating material of  claim 20 , wherein the organic binder is formaldehyde free. 
   
   
       32 . The mineral fiber insulating material of  claim 31 , wherein the organic binder comprises a product of a reaction including a reducing sugar. 
   
   
       33 . The mineral fiber insulating material of  claim 32 , wherein the organic binder comprises at least one Maillard reaction product. 
   
   
       34 . The mineral fiber insulating material of  claim 33 , wherein the at least one Maillard reaction product is a reaction product of reacting at least citric acid, ammonia and dextrose. 
   
   
       35 . The mineral fiber insulating material of  claim 32 , wherein the mineral fiber insulating material has a density between about 5 and 40 kg/m 3 . 
   
   
       36 . A heating device adapted for use at an operating temperature of greater than 100 degrees C. comprising the mineral fiber insulating material of  claim 20 . 
   
   
       37 . The heating device of  claim 36 , wherein the heating device is adapted for use as an oven or range. 
   
   
       38 . The heating device of  claim 36 , wherein the heating device is adapted for use as a storage heater.