Cement and calcium sulfate based binder composition

Patent metadata

Field	Value
Publication number	US-9815740-B2
Application number	US-201515300565-A
Country	US
Kind code	B2
Filing date	Apr 1, 2015
Priority date	Apr 3, 2014
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

The invention concerns a composition containing a) 2 to 80 weight % of Ordinary Portland Cement with respect to the total weight of the composition b) 2 to 80 weight % of a calcium sulfate based binder with respect to the total weight of the composition, with the proviso that the weight ratio of a) Ordinary Portland Cement to b) calcium sulfate based binder is from 95/5 to 5/95 and c) at least one retarder for calcium sulfate based binders, the retarder being a chemical structure, which comprises from 3 to 70 amino acids. Also concerned is the use of the compositions for self-levelling underlayments, tile adhesives, non-shrink grouts, floor screeds and repair mortars.

First claim

The invention claimed is:

1. Composition containing
a) 2 to 80 weight % of Ordinary Portland Cement with respect to the total weight of the composition,
b) 2 to 80 weight % of a calcium sulfate based binder with respect to the total weight of the composition, with the proviso that the weight ratio of a) Ordinary Portland Cement to b) calcium sulfate based binder is from 95/5 to 5/95,
c) at least one retarder for calcium sulfate based binders, the retarder being a chemical structure, which comprises from 3 to 70 amino acids, and
d) a calcium-silicate-hydrate based hardening accelerator for cementitious compositions.

2. Composition according to claim 1 , in which the molecular weight of the c) retarder for calcium sulfate based binders is from 300 g/mol to 10,000 g/mol.

3. Composition according to claim 1 , the c) retarder being c-1) a polycondensation product comprising from 3 to 70 amino acids in the structure of the polycondensation product or c-2) a hydrolysis product of an oligo peptide and/or polypeptide, said hydrolysis product comprising from 3 to 70 amino acids, optionally from 3 to 70 α-amino acids.

4. Composition according to claim 3 , in which the polycondensation product of c-1) comprises peptide bonds.

5. Composition according to claim 3 , in which the c) retarder for calcium sulfate based binders is the polycondensation product of c-1) and contains polycarboxylic acids and polyamines, the amine groups in the polyamines being primary and/or secondary amines, in a ratio so that the sum of all carboxylic equivalents in the polycarboxylic acids to the sum of all amine equivalents in the polyamines is in the range from 1/2 to 2/1, optionally the weight ratio of the sum of said polycarboxylic acids and polyamines is up to 50 weight % of the c) retarder for calcium sulfate based binders.

6. Composition according to claim 3 , in which the polycondensation product of c-1) is the reaction product of the amino acids with formaldehyde and contains a repeating unit [—NR 1 —CH 2 —]; R 1 is the same or is different and is a residue selected from —(CH 2 )n-COOH and —(CHR 2 )—COOH; n is the same or is different and is an integer from 1 to 5; R 2 is the same or is different and is selected from methyl, isopropyl, —CH 2 —CH 2 —CH(Me) 2 , —CHMe-CH 2 —CH 3 , —CH 2 -phenyl, -4-hydroxy-benzyl, —CH 2 -phenyl, —CH 2 -(3)-indol, —CH 2 —OH, —CHMeOH, —CH 2 —S—H, —CH 2 —CH 2 —S—CH 3 , —CH 2 —CONH 2 , —CH 2 —CH 2 —CONH 2 and —CH 2 —COOH.

7. Composition according to claim 1 , in which the b) calcium sulfate based binder is selected from the group of anhydrite, α-bassanite and β-bassanite or mixtures thereof.

8. Composition according to claim 1 , in which at least one dispersant for Ordinary Portland Cement a) and calcium sulfate based binders b) is contained.

9. Composition according to claim 8 , in which the dispersant for Ordinary Portland Cement a) and calcium sulfate based binders b) is a polymeric dispersant, which has anionic and/or anionogenic groups and polyether side chains, optionally the polyether side chains comprise poly alkylene glycol side chains.

10. Composition according to claim 9 , where the polymeric dispersant comprises as anionic and/or anionogenic group at least one structural unit of the general formulae (Ia), (Ib), (Ic) and/or (Id):

in which
R 1 is H or an unbranched or branched C 1 -C 4 alkyl group, CH 2 COOH or CH 2 CO—X—R 3 ;
X is NH—(C n H 2n ) or O—(C n H 2n ) with n=1, 2, 3 or 4, or is a chemical bond,
where the nitrogen atom or the oxygen atom is bonded to the CO group;

R 2 is OM, PO 3 M 2 , or O—PO 3 M 2 ; with the proviso that X is a chemical bond if R 2 is OM;
R 3 is PO 3 M 2 , or O—PO 3 M 2 ;

in which
R 3 is H or an unbranched or branched C 1 -C 4 alkyl group;
n is 0, 1, 2, 3 or 4;
R 4 is PO 3 M 2 , or O—PO 3 M 2 ;

in which
R 5 is H or an unbranched or branched C 1 -C 4 alkyl group;
Z is O or NR 7 ;
R 7 is H, (C n H 2n )—OH, (C n H 2n )—PO 3 M 2 , (C n H 2n )—OPO 3 M 2 , (C 6 H 4 )—PO 3 M 2 , or (C 6 H 4 )—OPO 3 M 2 , and
n is 1, 2, 3 or 4;

in which
R 6 is H or an unbranched or branched C 1 -C 4 alkyl group;
Q is NR 7 or O;
R 7 is H, (C n H 2n )—OH, (C n H 2n )—PO 3 M 2 , (C n H 2n )—OPO 3 M 2 , (C 6 H 4 )—PO 3 M 2 , or (C 6 H)—OPO 3 M 2 ,
n is, 2, 3 or 4;
and
where each M independently of any other is H or a cation equivalent.

11. Composition according to claim 9 , where the polymeric dispersant comprises as polyether side chain at least one structural unit of the general formulae (IIa), (IIb), (IIc) and/or (IId):

in which
R 10 , R 11 and R 12 independently of one another are H or an unbranched or branched C 1 -C 4 alkyl group;
E is an unbranched or branched C 1 -C 6 alkylene group, a cyclohexylene group, CH 2 —C 6 H 10 , 1,2-phenylene, 1,3-phenylene or 1,4-phenylene;
G is O, NH or CO—NH; or
E and G together are a chemical bond;
A is an unbranched or branched alkylene group with 2 to 5 carbon atoms or CH 2 CH(C 6 H 5 );
n is 0, 1, 2, 3, 4 or 5;
a is an integer from 2 to 350;
R 13 is H, an unbranched or branched C 1 -C 4 alkyl group, CO—NH 2 and/or COCH 3 ;

in which
R 16 , R 17 and R 18 independently of one another are H or an unbranched or branched C 1 -C 4 alkyl group;
E is an unbranched or branched C 1 -C 6 alkylene group, a cyclohexylene group, CH 2 —C 6 H 10 , 1,2-phenylene, 1,3-phenylene, or 1,4-phenylene, or is a chemical bond;
A is an unbranched or branched alkylene with 2 to 5 carbon atoms or CH 2 CH(C 6 H 5 );
n is 0, 1, 2, 3, 4 or 5;
L is C x H 2x with x=2, 3, 4 or 5, or is CH 2 CH(C 6 H 5 );
a is an integer from 2 to 350;
d is an integer from 1 to 350;
R 19 is H or an unbranched or branched C 1 -C 4 alkyl group;
R 20 is H or an unbranched C 1 -C 4 alkyl group; and
n is 0, 1, 2, 3, 4 or 5;

in which
R 21 , R 22 and R 23 independently of one another are H or an unbranched or branched C 1 -C 4 alkyl group;
W is O, NR 25 , or is N;
V is 1 if W═O or NR 25 , and is 2 if W═N;
A is an unbranched or branched alkylene with 2 to 5 carbon atoms or CH 2 CH(C 6 H 5 );
a is an integer from 2 to 350;
R 24 is H or an unbranched or branched C 1 -C 4 alkyl group;
R 25 is H or an unbranched or branched C 1 -C 4 alkyl group;

in which
R6 is H or an unbranched or branched C 1 -C 4 alkyl group;
Q is NR 10 ; N or O;
V is 1 if W═O or NR 10 and is 2 if W═N;
R 10 is H or an unbranched or branched C 1 -C 4 alkyl group;
A is a

Assignees

• Basf Se

Inventors

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

Classifications

• C04B28/04 Primary

  Portland cements · CPC title

• C04B2103/14

  Hardening accelerators · CPC title

• C04B2103/22

  Set retarders · CPC title

• C04B24/14

  Peptides; Proteins; Derivatives thereof · CPC title

• C04B22/064

  of the alkaline-earth metals · CPC title