Accelerator composition

Patent metadata

Field	Value
Publication number	US-10618842-B2
Application number	US-201615753603-A
Country	US
Kind code	B2
Filing date	Aug 19, 2016
Priority date	Aug 21, 2015
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

The invention relates to a process for producing a composition suitable as accelerator for the curing of cement, by contacting the components aa) at least one component selected from the series of hydraulic binders and/or latent hydraulic binders, and bb) at least one dispersant suitable for the dispersing of inorganic particles in water, and cc) water, the weight ratio of components aa) to cc) being between 1.5:1 and 1:70, wherein the rate ratio of components aa) to bb) is between 20:1 and 1:2. In addition, the use of the composition obtained as hardening acceleration for chemical mixtures in construction is disclosed.

First claim

What is claimed is:

1. A process for producing a composition suitable as an accelerator for curing cement, the process comprising
contacting
aa) at least one hydraulic binder, and
bb) at least one dispersant for dispersing inorganic particles in water, and
cc) water,
wherein a weight ratio of components aa) to cc) ranges from 1.5:1 to 1:70, and
a weight ratio of components aa) to bb) ranges from 20:1 to 1:2.

2. The process according to claim 1 , wherein said at least one dispersant comprises a water-soluble polymer having polyether groups of structural unit (I)
*—U—(C(O)) k —X-(AlkO) n —W  (I)

where
* represents a bonding site to the polymer,
U is a chemical bond or an alkylene group having 1 to 8 carbons,
X is oxygen, sulfur or a group NR 1 , where R 1 is hydrogen, C 1 -C 4 alkyl or benzyl,
k is 0 or 1,
n is an integer whose average value, based on the polymer, ranges from 3 to 300,
Alk is each independently a C 2 -C 4 alkylene, and
W is a hydrogen, a C 1 -C 6 alkyl, an aryl radical, or is a Y-F group, where
Y is a linear or branched alkylene group having 2 to 8 carbons and optionally a phenyl ring,

F is a 5- to 10-membered nitrogen heterocycle which is bonded via nitrogen and which as ring members, besides the nitrogen atom and carbon atoms, optionally has 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen, and sulfur; optionally the nitrogen ring members have a group R 2 which is hydrogen, a C 1 -C 4 alkyl or benzyl; and 1 or 2 carbon ring members are present in the form of a carbonyl group.

3. The process according to claim 1 , wherein said at least one dispersant comprises at least one group selected from the group consisting of a carboxyester group, a carboxyl group, a phosphono group, a sulfino group, a sulfo group, a sulfamido group, a sulfoxy group, a sulfoalkyloxy group, a sulfinoalkyloxy group, and a phosphonooxy group.

4. The process according to claim 1 , wherein said at least one dispersant comprises a polycondensation product comprising
(II) a structural unit containing an aromatic or heteroaromatic group and a polyether group, and
(III) a phosphated structural unit containing an aromatic or heteroaromatic group.

5. The process according to claim 4 , wherein
the structural unit (II) is represented by formula
A-U—(C(O)) k —X-(AlkO) n —W

where
each A is independently a substituted or unsubstituted, aromatic or heteroaromatic compound having 5 to 10 carbons in the aromatic system, U is a chemical bond or an alkylene group having 1 to 8 carbons,
X is oxygen, sulfur or a group NR 1 , where R 1 is hydrogen, C 1 -C 4 alkyl or benzyl,
k is 0 or 1,
each Alk is independently a C 2 -C 4 alkylene,
n is an integer whose average value, based on the polymer, ranges from 3 to 300,
W is a hydrogen, a C 1 -C 6 alkyl, an aryl radical, or is aY-F group, where
Y is a linear or branched alkylene group having 2 to 8 carbons and optionally a phenyl ring,
F is a 5- to 10-membered nitrogen heterocycle which is bonded via nitrogen and which as ring members, besides the nitrogen atom and carbon atoms, optionally has 1, 2 or 3 additional heteroatoms selected from the group consisting of oxygen, nitrogen, and sulfur; optionally the nitrogen ring members have a group R 2 which is hydrogen, a C 1 -C 4 alkyl or benzyl; and 1 or 2 carbon ring members are present in the form of a carbonyl group; and

the structural unit (III) is represented by formula

where
each D is independently a substituted or unsubstituted, aromatic or heteroaromatic compound having 5 to 10 carbons in the aromatic system,
E is independently N, NH or O,
m=2 if E=N and m=1 if E=NH or O,
each R 3 and each R 4 are independently a branched or unbranched C 1 to C 10 alkyl radical, C 5 to C 8 cycloalkyl radical, aryl radical, heteroaryl radical or H,
and each b is independently an integer from 0 to 300.

6. The process according to claim 4 , wherein the polycondensation product comprises a further structural unit (IV) represented by formula

wherein
R 5 and R 6 are each independently H, CH 3 , COOH or a substituted or unsubstituted, aromatic or heteroaromatic compound having 5 to 10 carbons,
each Y is independently the structural unit (II), the structural unit (III), or a further constituent of the polycondensation product.

7. The process according to claim 1 , wherein said at least one dispersant comprises at least one copolymer which is obtained by polymerization of a mixture of monomers comprising
(V) at least one ethylenically unsaturated monomer which comprises at least one radical selected from the group consisting of a carboxylic acid, a carboxylic salt, a carboxylic ester, a carboxylic amide, a carboxylic anhydride, and a carboxylic imide; and
(VI) at least one ethylenically unsaturated monomer comprising a polyether group.

8. The process according to claim 7 , wherein the ethylenically unsaturated monomer (V) is at least one selected from the group consisting of (Va), (Vb), and (Vc)

where
R 7 and R 8 independently of one another are hydrogen or an aliphatic hydrocarbon radical having 1 to 20 carbons;
B is H, —COOM a , —CO−O(C q H 2q O) r —R 9 , —CO—NH—(C q H 2q O) r —R 9 , where
M is hydrogen, a mono-, di- or trivalent metal cation, ammonium ion or an organic amine radical,
a is ⅓, ½ or 1,
R 9 is hydrogen, an aliphatic hydrocarbon radical having 1 to 20 carbons, a cycloaliphatic hydrocarbon radical having 5 to 8 carbons, an optionally substituted aryl radical having 6 to 14 carbons,
q independently for each (C q H 2q O) unit is 2, 3 or 4, and
r is 0 to 200;

Z is O, NR 16 , where R 16 independently at each occurrence is represented by a branched or unbranched C 1 to C 10 alkyl radical, C 5 to C 8 cycloalkyl radical, aryl radical, heteroaryl radical or H,

where
R 10 and R 11 independently of one another are hydrogen, an aliphatic hydrocarbon radical having 1 to 20 carbons, a cycloaliphatic hydrocarbon radical having 5 to 8 carbons, or an optionally substituted aryl radical having 6 to 14 carbons;
R 12 is independently (C n H 2n )—SO 3 H with n=0, 1, 2, 3 or 4 (C n H 2n )—OH with n=0, 1, 2, 3 or 4; (C n H 2n )—PO 3 H 2 with n=0, 1, 2, 3 or 4, (C n H 2n )—OPO 3 H 2 with n=0, 1, 2, 3 or 4, (C 6 H 4 )—SO 3 H, (C 6 H 4 )—PO 3 H 2 , (C 6 H 4 )—OPO 3 H, or (C n H 2n )—NR 14 b with n=0, 1.2, 3 or 4 and b=2 or 3;
R 13 is H, —COOM a , —CO—O(C q H 2q O) r —R 9 , —CO—NH—(C q H 2q O) r —R 9 , where M, a, R 9 , q and r possess definitions stated above;
R 14 is hydrogen, an aliphatic hydrocarbon radical having 1 to 10 carbons, a cycloaliphatic hydrocarbon radical having 5 to 8 carbons, an optionally substituted aryl radical having 6 to 14 carbons; and
Q is independently NH, NR 15 or O, where R 15 is an aliphatic hydrocarbon radical having 1 to 10 carbons, a cycloaliphatic hydrocarbon radical having 5 to 8 carbons or an optionally substituted aryl radical having 6 to 14 carbons.

9. The process according to claim 1 , wherein said at least one dispersant comprises at least one water-soluble polymer which has an average molar weight (Mw) of between 5000 and 150 000 g/mol as determ

Assignees

• Basf Se

Inventors

• Gaedt Torben
• Hesse Christoph

Classifications

• C04B2103/14

  Hardening accelerators · CPC title

• C04B2103/0053

  Water-soluble polymers · CPC title

• C04B2103/408

  Dispersants · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B40/0039 Primary

  Premixtures of ingredients · CPC title