Construction chemical compositions comprising a bisulfite adduct of glyoxylic acid

Patent metadata

Field	Value
Publication number	US-10723656-B2
Application number	US-201716308122-A
Country	US
Kind code	B2
Filing date	Jun 9, 2017
Priority date	Jun 9, 2016
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

The present invention relates to construction chemical compositions comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder. The composition is useful as a hydration control agent of the inorganic binder.

First claim

The invention claimed is:

1. A construction chemical composition, comprising a bisulfite adduct of glyoxylic acid or a salt or mixed salt thereof and an inorganic binder.

2. The construction chemical composition of claim 1 , wherein the bisulfite adduct is of formula (I):

wherein:
R1 is —COOX; and
X is, independently of one another, H or a cation equivalent K a wherein K is selected from the group consisting of an alkali metal, alkaline earth metal, zinc, iron, ammonium, or phosphonium cation, as mixtures thereof, and a is 1/n wherein n is the valence of the cation.

3. The construction chemical composition of claim 1 , wherein X is H, Na, K, Li or mixtures thereof.

4. The construction chemical composition of claim 1 , wherein the inorganic binder is selected from the group consisting of a hydraulic binder, a calcium sulfate-based binder, and a mixture thereof.

5. The construction chemical composition of claim 4 , wherein the hydraulic binder is an aluminate-containing cement.

6. The construction chemical composition of claim 5 , wherein the aluminate-containing cement is selected from the group consisting of a CEM cement, an aluminate cement, a sulfoaluminate cement, and mixtures thereof.

7. The construction chemical composition of claim 6 , wherein the aluminate-containing cement is CEM cement.

8. The construction chemical composition of claim 5 , wherein the aluminate-containing cement is a mixture of CEM cement and aluminate cement, or a mixture of CEM cement and sulfoaluminate cement, or a mixture of CEM cement, high alumina cement and sulfoaluminate cement.

9. The construction chemical composition of claim 4 , wherein the inorganic binder is calcium sulfate dihydrate, calcium, sulfate hemihydrate or anhydrite and mixtures thereof.

10. The construction chemical composition of claim 5 , wherein the inorganic binder is a mixture of an aluminate-containing cement and a calcium sulfate-based binder.

11. The construction chemical composition of claim 1 , further comprising at least one additive.

12. The construction chemical composition of claim 11 , wherein at least one additive is selected from the group consisting of inorganic carbonates, alkali metal sulfates, latent hydraulic binders, dispersants, hardening accelerators, hardening retarders, fillers, essentially aluminate-free cement, and aggregates or a mixture of two or more thereof.

13. The construction chemical composition of claim 12 , wherein the additive is at least one polymeric dispersant, phosphorylated polycondensation product or a sulfonic acid and/or sulfonate group containing dispersant.

14. The construction chemical composition of claim 13 , wherein the dispersant is a sulfonic acid and/or sulfonate group containing a dispersant selected from the group consisting of lignosulfonates, melamine formaldehyde sulfonate condensates, β-naphthalene sulfonic acid condensates, sulfonated ketone-formaldehyde-condensates, and copolymers comprising sulfo group containing units and/or sulfonate group-containing units.

15. The construction chemical composition of claim 12 , wherein the additive is selected from the group consisting of essentially aluminate-free cement, fillers, and aggregates or a mixture of two or more thereof.

16. The construction chemical composition of claim 12 , wherein the inorganic carbonate is an alkali metal carbonate or alkaline earth metal carbonate.

17. The construction chemical composition of claim 12 , wherein the additive is a hardening retarder.

18. The construction chemical composition of claim 1 , wherein the weight ratio of the inorganic binder to the bisulfite adduct is in the range from 10:1 to 10000:1.

19. The construction chemical composition of claim 1 , wherein the weight ratio of the inorganic binder to the bisulfite adduct is in the range from 1:10 to 1:10000.

20. A building product, comprising the construction chemical composition of claim 1 .

21. The building product of claim 20 , wherein a weight ratio of the inorganic binder to the bisulfite adduct is in the range from 10:1 to 1000:1.

Assignees

• Basf Se

Inventors

• Gaedt Torben
• Dengler Joachim
• Mazanec Oliver
• Hesse Christoph
• Seufert Sebastian

Classifications

• C04B24/16 Primary

  Sulfur-containing compounds · CPC title

• Y02W30/91

  Use of waste materials as fillers for mortars or concrete · CPC title

• C04B22/10

  containing carbon in the anion, e.g. carbonates · CPC title

• C04B28/14

  containing calcium sulfate cements {(gypsum-paper plates E04C)} · CPC title

• C04B28/04

  Portland cements · CPC title