Construction chemical compositions comprising a bisulfite adduct of glyoxylic acid

Patent metadata

Field	Value
Publication number	US-2019177223-A1
Application number	US-201716308122-A
Country	US
Kind code	A1
Filing date	Jun 9, 2017
Priority date	Jun 9, 2016
Publication date	Jun 13, 2019
Grant date	—

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

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 bisulfate 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, and 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 10000:1.

Assignees

• Basf Se

Inventors

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

Classifications

• C04B2103/408

  Dispersants · CPC title

• C04B2111/00672

  Pointing or jointing materials · CPC title

• C04B28/16

  containing anhydrite {, e.g. Keene's cement} · CPC title

• C04B2111/72

  Repairing or restoring existing buildings or building materials · CPC title

• C04B2103/24

  Hardening retarders · CPC title