MINERAL FIBRE BOARD
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 free 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,
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.