Reduced salt precipitation in carbohydrate containing binder compositions

Patent metadata

Field	Value
Publication number	US-10544325-B2
Application number	US-201816141430-A
Country	US
Kind code	B2
Filing date	Sep 25, 2018
Priority date	Apr 16, 2013
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

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 carbohydrate;
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 comprising an inorganic ammonium salt, wherein the inorganic ammonium salt reacts with the carbohydrate.

2. The aqueous binder composition of claim 1 , wherein the carbohydrate includes at least one reducing sugar.

3. The aqueous binder composition of claim 2 , wherein the reducing sugar comprises dextrose.

4. The aqueous binder composition of claim 1 , wherein the sequestrant comprises an organic acid or a salt of an organic acid.

5. The aqueous binder composition of claim 4 , wherein the organic acid comprises citric acid.

6. The aqueous binder composition of claim 1 , wherein the inorganic ammonium salt comprises one or more ammonium salts of sulfuric acid, phosphoric acid, nitric acid, or sulfonic acid.

7. The aqueous binder composition of claim 1 , wherein the inorganic ammonium salt comprises an ammonium sulfate salt or an ammonium phosphate salt.

Assignees

• Johns Manville

Inventors

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

Classifications

• C03C25/1095

  to obtain coated fabrics · CPC title

• D04H1/4226

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

• C08J5/043

  with glass fibres · CPC title

• C09D167/04

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C09D167/06 takes precedence) · CPC title

• D04H1/645

  Impregnation followed by a solidification process · CPC title