Hydration control mixture for mortar and cement compositions

Patent metadata

Field	Value
Publication number	US-2019119163-A1
Application number	US-201716308119-A
Country	US
Kind code	A1
Filing date	Jun 9, 2017
Priority date	Jun 9, 2016
Publication date	Apr 25, 2019
Grant date	—

Abstract

The present invention relates to a mixture comprising at least one compound comprising an α-hydroxy-carboxylic unit, α-hydroxy-sulfonic acid unit or α-carbonyl-carboxylic unit and at least one water-soluble organic carbonate. The mixture is useful as a hydration control agent in construction chemical compositions comprising an inorganic binder.

First claim

1 . A mixture comprising
a) at least one compound of formula I:

wherein
R1 is OH;
R2 is H, OH, C 1 -C 6 alkoxy, —SO 2 X, —SO 3 X, —OSO 3 X, —PO 3 X 2 , —COOX, —OPO 3 X 2 , -Z-COOX or —CH(OH)—SO 3 X;
R3 is H, C 1 -C 6 alkyl which may be substituted by 1 or 2 OH or C 1 -C 6 alkoxy;
m is 0 or 1; or
R1 and R2 taken together with the carbon atom to which they are attached form a carbonyl group provided m is 0;
R4 is COOY or SO 3 X;
X is selected from H or a cation equivalent K a wherein K is selected from an alkali metal, alkaline earth metal, zinc, iron, ammonium or phosphonium cation and a is 1/n wherein n is the valency of the cation;
Y=is selected from X, C 1 -C 6 alkyl or phenyl; and
Z is CH 2 or CH(OH), and

b) at least one water-soluble organic carbonate.

2 . The mixture of claim 1 , wherein m is 0 and R2 is OH.

3 . The mixture of claim 1 , wherein R2 is —COOX.

4 . The mixture of claim 1 , wherein R3 is H.

5 . The mixture of claim 1 , wherein R4 is COOX.

6 . The mixture of claim 1 , wherein
a) m is 0, R2 is —SO 3 X and R4 is —COOX; b) m is 0, R2 is —COOX and R4 is —COOX; c) m is 0, R2 is -Z-COOX and Z is CH 2 and R4 is —COOX; d) m is 0, R2 is -Z-COOX and Z is —CH(OH) and R4 is —COOX; e) m is 0; R1 and R2 taken together with the carbon atom to which they are attached form a carbonyl group and R4 is —COOX; f) m is 0; R1 and R2 taken together with the carbon atom to which they are attached form a carbonyl group and R4 is —SO 3 X; or g) m is 0; R2 is —CH(OH)—SO 3 X, and R4 is —SO 3 X;

7 . The mixture of claim 6 , wherein m and R2 are as defined in a) to g) and R3 is H.

8 . The mixture of claim 1 , wherein Y is X.

9 . The mixture of claim 1 , wherein the water-soluble carbonate is at least one selected from the group consisting of ethylene carbonate, propylene carbonate, trimethylene carbonate, glycerol carbonate, dimethyl carbonate, and di(hydroxyethyl)carbonate.

10 . The mixture of claim 9 , wherein the water-soluble carbonate is ethylene carbonate, propylene carbonate or a mixture thereof.

11 . The mixture of claim 1 , wherein a weight ratio of component (a) to component (b) is in the range from 100:1 to 1:100.

12 . The mixture of claim 1 , additionally comprising at least one additive.

13 . The mixture of claim 12 , wherein the additive is at least one selected from the group consisting of inorganic carbonates, alkali metal sulfates, latent hydraulic binders, dispersants, and fillers.

14 . The mixture of claim 13 , wherein the additive is at least one inorganic carbonate.

15 . The mixture of claim 14 , wherein the inorganic carbonate is at least one selected from the group consisting of sodium carbonate, potassium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, and calcium-magnesium carbonate.

16 . The mixture of claim 13 , wherein the additive is at least one polymeric dispersant.

17 . The mixture of claim 16 , wherein the dispersant is a sulfonic acid and/or sulfonate group containing 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 and carboxylic acid and/or carboxylate group-containing units.

18 . A construction chemical composition comprising at least one inorganic binder and the mixture of claim 1 .

19 . The construction chemical composition of claim 18 , wherein the inorganic binder is at least one selected from the group consisting of calciumsulfate hemihydrate, anhydrite and aluminate-containing cement.

20 . The construction chemical composition of claim 19 , wherein the aluminate-containing cement is at least one selected from the group consisting of CEM cement and aluminate cement.

21 . The construction chemical composition of claim 20 , wherein the aluminate-containing cement is CEM cement.

22 . The construction chemical composition of claim 20 , wherein the aluminate-containing cement is a mixture of CEM cement and aluminate cement or a mixture of CEM cement, high alumina cement and sulfoaluminate cement.

23 . The construction chemical composition of claim 20 , additionally comprising a calcium sulfate.

24 . The construction chemical composition of claim 18 , additionally comprising at least one additive.

25 . The construction chemical composition of claim 24 , wherein the additive is at least one selected from the group consisting of inorganic carbonates, alkali metal sulfates, latent hydraulic binders, dispersants, hardening accelerators, fillers, essentially aluminate-free cement, and aggregates.

26 . The construction chemical composition of claim 25 , wherein the additive is at least one polymeric dispersant.

27 . The construction chemical composition of claim 26 , wherein the dispersant is a sulfonic acid and/or sulfonate group containing 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 and carboxylic acid and/or carboxylate group-containing units.

28 . A method, comprising employing the mixture according to claim 1 as a retarder for aluminate-containing building material formulations and/or for producing building products.

Assignees

• Basf Se

Inventors

• Dengler Joachim
• Hesse Christoph
• Seufert Sebastian

Classifications

• C04B28/065

  Calcium aluminosulfate cements, e.g. cements hydrating into ettringite · CPC title

• C04B2103/14

  Hardening accelerators · CPC title

• C04B2111/70

  Grouts, e.g. injection mixtures for cables for prestressed concrete · CPC title

• C04B2103/22

  Set retarders · CPC title

• C04B2111/28

  Fire resistance, i.e. materials resistant to accidental fires or high temperatures · CPC title