Inorganic binder composition comprising a copolymer

• US 10,035,729 B2
• Filed: 06/12/2015
• Issued: 07/31/2018
• Est. Priority Date: 06/12/2014
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Langlotz, Bjorn, Gastner, Thomas, Gadt, Torben, Mazanec, Oliver, Schinabeck, Michael, Eissmann, Diana, Friedrich, Stefan
• Primary Examiner(s): JONES JR., ROBERT STOCKTON
• Application Number:
  US15/318,033
• Publication Number:
  US 20170129812A1
• Time in Patent Office: 1,145 Days
• CPC Class Codes: C04B 14/06 Quartz; Sand
• CPC Class Codes: C04B 2103/0079 Rheology influencing agents
• CPC Class Codes: C04B 2103/0082 Segregation-preventing agents; Sedimentation-preventing agents
• CPC Class Codes: C04B 2103/0083 Bleeding-preventing agents
• CPC Class Codes: C04B 2103/406 non-ionic
• CPC Class Codes: C04B 2111/00517 for masonry
• CPC Class Codes: C04B 2111/00637 as glue or binder for uniting building or structural materials
• CPC Class Codes: C04B 2111/00646 Masonry mortars
• CPC Class Codes: C04B 2111/00672 Pointing or jointing materials
• CPC Class Codes: C04B 2111/62 Self-levelling compositions
• CPC Class Codes: C04B 2111/72 Repairing or restoring existing buildings or building materials
• CPC Class Codes: C04B 24/165 containing polyether side chains
• CPC Class Codes: C04B 24/246 containing polyether side chains
• CPC Class Codes: C04B 24/2647 containing polyether side chains
• CPC Class Codes: C04B 24/2652 Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
• CPC Class Codes: C04B 24/267 containing polyether side chains
• CPC Class Codes: C04B 24/32 Polyethers, e.g. alkylphenol polyglycolether
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 28/04 Portland cements
• CPC Class Codes: C04B 28/06 Aluminous cements monolithic refractories or refractory mortars C04B35/66
• CPC Class Codes: C04B 28/065 : Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
• CPC Class Codes: C04B 28/16 : containing anhydrite , e.g. Keene's cement
• CPC Class Codes: C04B 40/0039 : Premixtures of ingredients
• CPC Class Codes: C08F 220/585 : and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
• CPC Class Codes: C08F 2800/20 : as weight or mass percentages

Abstract

The present invention relates to a composition comprising (α) at least one inorganic binder and (β) at least one water-soluble copolymer based on (a) 0.1 to 20 wt % of at least one monomer of the formula (I) and (b) 25 to 99.9 wt % of at least one hydrophilic monomer (b) which is different from monomer (a), where the at least one copolymer has a molar mass average M of 1 500 000 to 30 000 000 g/mol. Furthermore, a process for producing this composition is disclosed. A further aspect of the present invention is the use of the copolymer of component (β) as rheological additive in a composition of the invention.

Claims

1. A composition comprising

(α

) at least one inorganic binder

(β

) at least one water-soluble copolymer based on

(a) 0.1 to 20 wt % of at least one monomer of the formula (I),

H₂C═

C(R¹)—

R²—

O—

(—

CH₂—

CH₂—

O—

)_k—

(—

CH₂—

CH(R³)—

O—

)_l—

(—

CH₂—

CH₂—

O—

)_m—

R⁴ 

 

(I)

where the units —

(—

CH₂—

CH₂—

O—

)_k, —

(—

CH₂—

CH(R³)—

O—

)_l and —

(—

CH₂—

CH₂—

O—

)_m are arranged in a block structure in the order shown in formula (I)

and the radicals have the following meanings;

k;

is from 10 to 150;

l ;

is from 5 to 25;

m;

is from 1 to 15;

R¹;

is H or methyl;

the radicals R²;

are each, independently of one another, a single bond or a divalent, linking group selected from the group consisting of —

(C_nH_2n)— and

—

O—

(C_n′

H_2n′

)— and

—

C(O)—

O—

(C_n″

H_2n″

)—

, where n, n′ and

n″

are each a natural number from 1 to 6;

R³;

is a hydrocarbon radical having at least 2 carbon atoms or an ether group of the general formula —

CH₂—

O—

R^3′

, where R^3′

is a hydrocarbon radical having at least 2 carbon atoms and the radicals R³ can be identical or different within the group —

(—

CH₂—

CH(R³)—

O—

)_l;

the radicals R⁴;

are each, independently of one another, H or a hydrocarbon radical having 1 to 4 carbon atoms, and

(b) 25 to 99.9 wt % by weight of at least one monoethylenically unsaturated, hydrophilic monomer (b) different from monomer (a),

where the wt % figures are in each case based on the total amount of all monomers in the copolymer and the at least one copolymer has a molar mass average M of 1 500 000 to 30 000 000 g/mol which is determined by the Mark-Houwink relationship (1)

M=([η

]/K)^1/α

 

 

(1),

where K=0.0049, α

=0.8 and [η

] is the intrinsic viscosity.

2. The composition according to claim 1, wherein the inorganic binder is at least one from the series calcium sulfate n-hydrate, Portland cement, white cement, calcium aluminum cement, calcium sulfoaluminum cement, geopolymer, and latent hydraulic and/or pozzolanic binder.

3. The composition according to claim 1, wherein the index k is from 23 to 26.

4. The composition according to claim 1, wherein the index l is from 8.5 to 17.25.

5. The composition according to claim 1, wherein the radicals have the following meanings:

k;

is from 23 to 26;

l;

is from 12.75 to 17.25;

m;

is from 2 to 5;

R¹;

is H;

R²;

is a divalent, linking group —

O—

(C_n′

H_2n′

)—

, where n′

is 4;

R³;

is a hydrocarbon radical having 2 carbon atoms;

R⁴;

is H.

6. The composition according to claim 1, wherein at least one of the monomers (b) is a monomer comprising acidic groups, the acidic groups comprising at least one group selected from the group of —

COOH, —

SO₃H and —

PO₃H₂ and salts thereof.

7. The composition according to claim 1, which comprises at least two different monoethylenically unsaturated, hydrophilic monomers (b), namely

at least one neutral hydrophilic monomer (b1), and

at least one hydrophilic anionic monomer (b2) which comprises at least one acidic group selected from the group of —

COOH, —

SO₃H and —

PO₃H₂ and salts thereof.

8. The composition according to claim 1, wherein the at least one copolymer is a copolymer based on

at least one monomer (a) of the formula (I), and also

acrylamide as neutral hydrophilic monomer (b1) and

acrylamido-2-methylpropanesulfonic acid (AMPS) as anionic hydrophilic monomer (b2).

9. The composition according to claim 1, wherein the component (β

) further comprises (c) at least one nonionic, nonpolymerizable, surface-active component.

10. The composition according to claim 1, which comprises, based on its dry mass, at least 20 wt % of the at least one inorganic binder and 0.0005 to 5 wt % of the at least one copolymer.

11. A process for producing a composition according to claim 1, wherein the monomer (a) of the general formula (I) is prepared by a process comprising the following steps:

a) reaction of a monoethylenically unsaturated alcohol A1 of the general formula (II)

H₂C═

C(R¹)—

R²—

OH 

 

(II),

with ethylene oxide,

where the radicals R¹ and R² are as defined;

with addition of an alkaline catalyst K1 comprising KOMe and/or NaOMe;

giving an alkoxylated alcohol A2;

b) reaction of the alkoxylated alcohol A2 with at least one alkylene oxide Z of the formula (Z)

12. A process for producing a composition as claimed in claim 1, wherein the copolymer is prepared by subjecting at least one monomer (a) and at least one hydrophilic monomer (b) to an aqueous solution polymerization.

13. The process according to claim 12, wherein the solution polymerization is carried out at a pH in the range from 5.0 to 9.

14. The process according to claim 12, wherein the solution polymerization is carried out in the presence of at least one surface-active component (c).

15. A process comprising utilizing the copolymer of component (β

) as rheological additive in a composition according to claim 1.