Reduced salt precipitation in carbohydrate containing binder compositions

Patent metadata

Field	Value
Publication number	US-10150882-B2
Application number	US-201715591997-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	Apr 16, 2013
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

Aqueous binder compositions with reduced rates of salt precipitation are described. The compositions may include a carbohydrate and a sequestrant for sequestering one or more multivalent ions (e.g., Ca2+, Mg2+, Ba2+, Al3+, Fe2+, Fe3+, etc.). The sequestrant reduces a precipitation rate for the multivalent ions from the aqueous binder composition. Methods of reducing salt precipitation from a binder composition are also described. The methods may include the steps of providing an aqueous binder solution having one or more carbohydrates. They may also include adding a sequestrant for one or more multivalent ions to the aqueous binder solution. The sequestrant reduces a precipitation rate for the multivalent ions from the binder composition.

First claim

What is claimed is:

1. An aqueous binder composition comprising:
a reducing sugar;
a nitrogen-containing reactant comprising at least one of an amine, an amine-acid salt, or an organic ammonium salt;
a sequestrant for one or more multivalent ions, wherein the sequestrant reduces a precipitation rate for the multivalent ions from the aqueous binder composition; and
a polymerization catalyst to catalyze a reaction between the reducing sugar and the nitrogen-containing reactant.

2. The aqueous binder composition of claim 1 , wherein the reducing sugar comprises at least one of dextrose and fructose.

3. The aqueous binder composition of claim 1 , wherein the amine comprises at least one of an aliphatic amine, a cycloaliphatic amine, an aromatic amine, or an amino acid.

4. The aqueous binder composition of claim 3 , wherein the aliphatic amine comprises at least one of 1,2-diethylamine, 1,3-propanediamine, 1,4-butanediamine, 1,5-pentanediamine, 1,6-hexanediamine, α,α′-diaminoxylene, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine.

5. The aqueous binder composition of claim 3 , wherein the organic ammonium salt comprises an ammonium salt of a polycarboxylic acid.

6. The aqueous binder composition of claim 5 , wherein the ammonium salt of the polycarboxylic acid comprises an ammonium citrate salt.

7. The aqueous binder composition of claim 1 , wherein the polymerization catalyst comprising an inorganic ammonium salt.

8. The aqueous binder composition of claim 7 , wherein the inorganic ammonium salt comprises at least one of ammonium phosphate or ammonium sulfate.

9. The aqueous binder composition of claim 1 , wherein the binder composition further comprises ammonia.

Assignees

• Johns Manville

Inventors

• Alavi Kiarash
• Miele Philip Francis
• Lester Uranchimeg
• Asrar Jawed

Classifications

• C09D133/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• D04H1/4226

  characterised by the apparatus for manufacturing the glass fleece · CPC title

• C09D133/064

  containing anhydride, COOH or COOM groups, with M being metal or onium-cation · CPC title

• D04H1/64

  the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions · CPC title

• D04H1/643

  characterised by a combination of the chemical composition and the impregnation or treatment process or apparatus · CPC title