Composition based on calcium silicate hydrate

Patent metadata

Field	Value
Publication number	US-10005695-B2
Application number	US-201515316547-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	Jun 6, 2014
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

The invention relates to a composition comprising 5-50 wt % of calcium silicate hydrate, 10-60 wt % of at least one water-soluble, acid group-containing polymer comprising polyether groups, and 5-40 wt % of at least one polyalkylene glycol ether. Further disclosed is a process for preparing this composition, and cementitious mixtures comprising the composition. A further aspect of the present invention is the use of the composition of the invention in cementitious mixtures for accelerating the development over time of the dispersing action of the acid group-containing polymer after addition of the mixing water and a subsequently accelerated curing of the mixture.

First claim

The invention claimed is:

1. A composition comprising
5-50 wt % of calcium silicate hydrate,
10-60 wt % of at least one water-soluble, acid group-containing polymer comprising polyether groups,
5 to less than 30 wt % of at least one polyalkylene glycol ether of the formula (1)
R α —(C β H 2β O) ω —H  (1)

where
R α is hydrogen or an aliphatic hydrocarbon radical having 1 to 20 C atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms, or an optionally substituted aryl radical having 6 to 14 C atoms, the aryl radical comprising no acid groups, and
β independently at each occurrence and in a manner identical or different for each (C β H 2β O) unit is 2, 3, 4 or 5, and
ω is 3 to 200,

wherein the weight percentages are based on the total weight of the composition.

2. The composition according to claim 1 , wherein the polyether groups of the at least one water-soluble, acid group-containing polymer are polyether groups of the structural unit (I),
*—U—(C(O)) k —X-(AlkO) n —W  (I)

where
indicates the bonding site to the acid group-containing polymer,
U is a chemical bond or an alkylene group having 1 to 8 C atoms,
X is oxygen, sulfur or a group NR 1 ,
k is 0 or 1,
n is an integer whose average value, based on the acid group-containing polymer, is in the range from 3 to 300,
Alk is C 2 -C 4 alkylene, and within group (Alk-O) n Alk may be identical or different,
W is a hydrogen, a C 1 -C 6 alkyl, or an aryl radical or is the group Y-F, where
Y is a linear or branched alkylene group having 2 to 8 C atoms and optionally may carry 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 beside carbon atoms, optionally may have 1, 2 or 3 additional heteroatoms selected from oxygen, nitrogen, and sulfur, it being possible for the nitrogen ring members to have a group R 2 , and for 1 or 2 carbon ring members to be present in the form of a carbonyl group,
R 1 is hydrogen, C 1 -C 4 alkyl or benzyl, and
R 2 is hydrogen, C 1 -C 4 alkyl or benzyl.

3. The composition according to claim 1 , wherein the acid group of the water-soluble polymer is at least one from the series of carboxyl, phosphono, sulfino, sulfo, sulfamido, sulfoxy, sulfoalkyloxy, sulfinoalkyloxy, and phosphonooxy group.

4. The composition according to claim 1 , wherein the water-soluble, acid group-containing polymer comprising polyether groups is a polycondensation product comprising
(II) a structural unit containing an aromatic or heteroaromatic and a polyether group, and
(III) a phosphated structural unit containing an aromatic or heteroaromatic.

5. The composition according to claim 4 , wherein the structural units (II) and (III) are represented by the following general formulae
A-U—(C(O)) k —X-(AlkO) n —W  (II)

where
A is identical or different and is represented by a substituted or unsubstituted, aromatic or heteroaromatic compound having 5 to 10 C atoms in the aromatic system, the other radicals possessing the definition stated for structural unit (I);

where
D is identical or different and is represented by a substituted or unsubstituted, aromatic or heteroaromatic compound having 5 to 10 C atoms in the aromatic system,
where
E is identical or different and is represented by N, NH or O,
where
m=2 if E=N and m=1 if E=NH or O,
where
R 3 and R 4 independently of one another are identical or different and are 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
b is identical or different and is represented by an integer from 0 to 300.

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

where
Y independently at each occurrence is identical or different and is represented by (II), (III) or further constituents of the polycondensation product, and
where
R 5 and R 6 are identical or different and are represented by H, CH 3 , COOH or a substituted or unsubstituted aromatic or heteroaromatic compound having 5 to 10 carbon atoms.

7. The composition according to claim 1 , wherein the water-soluble, acid group-containing polymer comprising polyether groups is 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 from the series of carboxylic acid, carboxylic salt, carboxylic ester, carboxylic amide, carboxylic anhydride, and carboxylic imide
and
(VI) at least one ethylenically unsaturated monomer having a polyether group.

8. The composition according to claim 7 , wherein the ethylenically unsaturated monomer (V) is represented by at least one of the following general formulae from the group 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 C atoms,
B is H, —COOM a , —CO—O(C q H 2q O) r —R 9 , or —CO—NH—(C q H 2q O) r —R 9 ,
M is hydrogen, a mono-, di- or trivalent metal cation, ammonium ion, or an organic amine radical,
a is 1/3, 1/2 or 1,
R 9 is hydrogen, an aliphatic hydrocarbon radical having 1 to 20 C atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms, or an optionally substituted aryl radical having 6 to 14 C atoms,
q independently at each occurrence and in a manner identical or different for each (C q H 2q O) unit is 2, 3 or 4 and,
r is 0 to 200,
Z is O, NR 16 ,
R 16 independently at each occurrence is identical or different and 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 or an aliphatic hydrocarbon radical having 1 to 20 C atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms, or an optionally substituted aryl radical having 6 to 14 C atoms,
R 12 is identical or different and is represented by (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 2 , 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 , or —CO—NH—(C q H 2q O) r —R 9 , where Me, R 9 , q, and r possess definitions stated above,
R 14 is hydrogen, an aliphatic hydrocarbon radical having 1 to 10 C atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms, or an optionally substituted aryl radical having 6 to 14 C atoms,
Q is identical or different and is represented by NH, NR 15 or O; where R 15 is an aliphatic hydrocarbon radical having 1 to 10 C atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 C atoms, or an optionally substituted aryl radical having 6 to 14 C atoms.

9. The composition according to claim 1 , which

Assignees

• Basf Se

Inventors

• Bichler Manfred
• Gädt Torben
• Loges Niklas
• Mazanec Oliver
• Hesse Christoph

Classifications

• C04B22/00

  Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators {or shrinkage compensating agents} · CPC title

• C04B24/32 Primary

  Polyethers, e.g. alkylphenol polyglycolether · CPC title

• C04B2103/14

  Hardening accelerators · CPC title

• C04B14/06

  Quartz; Sand · CPC title

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title