Additive for construction chemical compositions

Patent metadata

Field	Value
Publication number	US-2019270671-A1
Application number	US-201716345404-A
Country	US
Kind code	A1
Filing date	Oct 23, 2017
Priority date	Oct 31, 2016
Publication date	Sep 5, 2019
Grant date	—

Abstract

The present invention concerns an additive for construction chemical compositions, in particular mortar and cement compositions. The additive comprises at least one amide or ester of a sugar acid and at least one water-soluble comb polymer which contains, on the main chain, acid functions and side chains having ether functions. The additive is useful for retarding the hardening of a construction chemical composition.

First claim

1 : An additive, suitable for construction chemical compositions and comprising:
a) at least one amide or ester of a sugar acid and b) at least one water-soluble comb polymer which comprises, on the main chain, acid functions and side chains comprising polyether moieties, wherein the polyether moieties have a number average molecular weight in a range of from 1000 to 5000 g/mole.

2 : The additive of claim 1 , comprising an amide or ester of a sugar acid having formula (I):

wherein
R 1 is —NR 3 R 4 or —OR 4 ;
R 2 is —CH 2 OH, —COOH or —COR 1 ;
R 3 is H, C 1 -C 6 -alkyl, hydroxy-C 1 -C 6 -alkyl or -(AO) x —R 5 ;
R 4 is -(AO) x —R 5 , C 1 -C 6 -alkyl or hydroxy-C 1 -C 6 -alkyl;
R 5 is H, C 1 -C 12 -alkyl, C 1 -C 12 -alkyl substituted by —NH 2 or —X—CO—(CHOH)n-R 2 ;
X is —NH— or —O—;
A at each occurrence may be the same or different and is C m H 2m ;
m is 2, 3, 4, 5 or 6;
n is 2, 3, 4, or 5; and
x is 1 to 100.

3 : The additive of claim 2 , wherein the amide or ester of the sugar acid having formula (I) comprises at least one group -(AO) x —R 5 .

4 : The additive of claim 2 , comprising an amide or ester of a sugar acid having formula (I) wherein R 1 is —NR 3 R 4 , R 3 is H or C 1 -C 6 -alkyl, R 4 is -(AO) x —R 5 and R 5 is H, C 1 -C 4 -alkyl or C 1 -C 4 -alkyl substituted by —NH 2 .

5 : The additive of claim 2 , comprising an amide or ester of a sugar acid having formula (I) wherein R 2 is —CH 2 OH.

6 : The additive of claim 2 , comprising an amide or ester of a sugar acid having formula (I) wherein R 1 is —NR 3 R 4 , n is 4, R 2 is —CH 2 OH, R 3 is H, R 4 is -(AO) x —R 5 , and R 5 is H or C 1 -C 4 -alkyl.

7 : The additive of claim 2 , comprising an amide or ester of a sugar acid having formula (I) wherein R 1 is —NR 3 R 4 and R 3 and R 4 are hydroxy-C 1 -C 6 -alkyl.

8 : The additive of claim 2 , comprising an amide or ester of a sugar acid having formula (I) wherein R 1 is —OR 4 , R 4 is -(AO) x —R 5 and R 5 is H or C 1 -C 12 -alkyl.

9 : The additive of claim 1 , wherein the at least one water-soluble comb polymer comprises as units having acid functions 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 2 ;
X is NH—(C n H 2n ), O(C n H 2n ) with n=1, 2, 3 or 4, where the nitrogen atom or the oxygen atom is bonded to the CO group, or is a chemical bond;
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;

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 4 )—OPO 3 M 2 ,
n is 1, 2, 3 or 4; and
each M independently is H or a cation equivalent.

10 : The additive of claim 1 , wherein the at least one water-soluble comb polymer comprises as units having a side chain with polyether moieties 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;
Z is O or S;
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 C x H 2x with x=2, 3, 4 or 5, or is CH 2 CH(C 6 H 5 );
n is 0, 1, 2, 3, 4 or 5;
a is selected such that a number average molecular weight of the moiety -(AO) a - is in a range of from 1000 to 5000;
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 C x H 2x with x=2, 3, 4 or 5, or is CH 2 CH(C 6 H 5 );
n is 0, 1, 2, 3, 4 and/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 and d are selected such that a number average molecular weight of the moieties -(AO) a - and -(LO) d — together are in a range of from 1000 to 5000;
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;

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;
Y is 1 if W═O or NR 25 , and is 2 if W═N;
A is C x H 2x with x=2, 3, 4 or 5, or is CH 2 CH(C 6 H 5 );
a is selected such that a number average molecular weight of the moiety -(AO) a - or both moieties -(AO) a - together are in a range of from 1000 to 5000;
R 24 is H or an unbranched or branched C 1 -C 4 alkyl group; and
R 25 is H or an unbranched or branched C 1 -C 4 alkyl group;

in which
R 6 is H or an unbranched or branched C 1 -C 4 alkyl group;
Q is NR 10 , N or O;
Y 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; and
A is C x H 2x with x=2, 3, 4 or 5, or is CH 2 C(C 6 H 5 )H;
R 24 is H or an unbranched or branched C 1 -C 4 alkyl group;
M is H or a cation equivalent; and
a is selected such that a number average molecular weight of the moiety -(AO) a - or both moieties -(AO) a - together are in a range of from 1000 to 5000.

11 : The additive of claim 1 , wherein the side chains of the at least one water-soluble comb polymer have a molecular weight in a range of from 1000 to 4000.

12 : The additive of claim 1 , wherein a weight ratio of (a) to (b) is in a range of from 10:1 to 1:5.

13 : The additive of claim 1 , further comprising a calcium silicate hydra

Assignees

• Basf Se

Inventors

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

Classifications

• C04B2111/70

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

• C04B2111/00637

  as glue or binder for uniting building or structural materials · CPC title

• C04B24/045

  Esters, e.g. lactones · CPC title

• C04B28/04

  Portland cements · CPC title

• C04B14/043

  Alkaline-earth metal silicates, e.g. wollastonite · CPC title