IP Library › Granted Patent US 12,338,163
Granted Patent B2
US 12,338,163 · App. 17/878,795 · Granted Jun 24, 2025

Uncured articles with improved shelf-life

Inventors: Charles Fitch Appley (Cumberland, IN); Gert Mueller (New Albany, OH)
Assignees: Knauf Insulation, Inc.; Knauf Insulation SPRL
C03C13/06C03C25/1095C03C25/32C07H3/02F16L59/028
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Quick Facts
Patent No.
US 12,338,163
App. No.
17/878,795
Granted
Jun 24, 2025
Kind
B2
Abstract

Disclosed are formaldehyde-free, thermally-curable, alkaline, aqueous binder compositions. Also disclosed are compositions comprising formaldehyde-free, thermally-curable binder compositions, as described herein, applied to non-woven fibers. Uses of the disclosed binder compositions as binders for non-woven fibers are also disclosed.

Claims (24)

1. A method to improve shelf-life of uncured mineral fiber product comprising an uncured disposed on mineral fibers, the method comprising;

(i) preparation or provision of an aqueous binder composition,

(ii) application of the aqueous binder composition onto mineral fibers after their formation, whereby residual heat in the mineral fibers causes a portion of water in the aqueous binder composition to evaporate, and

(iii) collecting the mineral fibers having the aqueous binder composition disposed thereon in the form of a sticky, viscous or tacky liquid to form a batt,

wherein the aqueous binder composition consists of an aqueous mixture of (a) at least two reducing sugars comprising 1) at least one aldohexose sugar selected from the group consisting of dextrose, mannose, galactose, allose, altrose, talose, gulose, and idose; and 2) at least one ketohexose sugar selected from the group consisting of fructose, psicose, sorbose, and tagatose, wherein the mixture has a lower crystallization point than a carbohydrate mixture consisting of dextrose, and

(b) an acid precursor consisting of an inorganic salt selected from the group consisting of ammonium sulfate salts, ammonium phosphate salts, ammonium nitrate salts, ammonium carbonate salts, and combinations thereof, and/or

(c) an ammonium salt of a polycarboxylic acid; optionally

(d) a silicon-containing compound; and optionally

(e) a corrosion inhibitor.

2. The method of claim 1 , wherein the inorganic salt is selected from the group consisting of ammonium sulfate salts, ammonium phosphate salts, ammonium carbonate salts, and combinations thereof.

3. The method of claim 1 , wherein the polycarboxylic acid is selected from the group consisting of unsaturated aliphatic polycarboxylic acids, saturated aliphatic polycarboxylic acids, aromatic polycarboxylic acids, unsaturated cyclic polycarboxylic acids, saturated cyclic polycarboxylic acids, and combinations thereof.

4. The method of claim 1 , wherein the aqueous binder composition consists of the aqueous mixture of (a) the at least two reducing sugars, (b) the acid precursor consisting of an inorganic salt, and/or (c) the ammonium salt of a polycarboxylic acid, and (d) the silicon-containing compound.

5. The method of claim 1 , wherein the aqueous binder composition consists of the aqueous mixture of (a) the at least two reducing sugars, (b) the acid precursor consisting of an inorganic salt, and/or (c) the ammonium salt of a polycarboxylic acid, and (e) the corrosion inhibitor.

6. The method of claim 1 , wherein the aqueous binder composition has 5-25% by dry weight of an acid precursor consisting of an inorganic salt selected from the group consisting of ammonium sulfate salts, ammonium phosphate salts, ammonium nitrate salts, ammonium carbonate salts, and combinations thereof.

7. The method of claim 1 , wherein the aqueous binder composition has 10-20% by dry weight of an acid precursor consisting of an inorganic salt selected from the group consisting of ammonium sulfate salts, ammonium phosphate salts, ammonium nitrate salts, ammonium carbonate salts, and combinations thereof.

8. The method of claim 1 , wherein the at least two reducing sugars is provided as high fructose corn syrup (HFCS).

9. The method of claim 1 , wherein the silicon-containing compound is selected from the group consisting of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, and mixtures thereof.

10. The method of claim 1 , wherein the corrosion inhibitor is selected from the group consisting of dedusting oil, monoammonium phosphate, sodium metasilicate pentahydrate, and melamine.

11. The method of claim 1 , wherein the uncured mineral fiber product is a fiberglass insulation product.

12. The method of claim 1 , wherein the mineral fibers comprise fibers selected from glass fibers and stone wool fibers.

13. The method of claim 12 , wherein the mineral fibers comprise glass fibers.

14. The method of claim 1 , wherein the uncured binder has a moisture content of 1.5-3%.

15. The method of claim 1 , wherein the aqueous binder composition applied to the mineral fibers has a pH of 7.5-9.5.

16. The method of claim 1 , wherein the mineral fibers comprise glass fibers at a compositional concentration of 80-99% by weight.

Continuity (3)
Continuation 15116254
Provisional Application 61937110 · Feb 7, 2014
Related Publication 20220363589A1 · Nov 17, 2022
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