MONO- AND BISALKYLENETRIALKOXYSILANE DISPERSANTS FOR HYDRAULIC BINDERS

• US 20170355642A1
• Filed: 10/08/2015
• Published: 12/14/2017
• Est. Priority Date: 10/22/2014
• Status: Abandoned Application

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: ERNST, Martin, FESSENBECKER, Achim
• Application Number:
  US15/520,888
• Publication Number:
  US 20170355642A1
• Time in Patent Office: Days
• CPC Class Codes: C04B 14/02 Granular materials , e.g. microballoons
• CPC Class Codes: C04B 2103/408 Dispersants
• CPC Class Codes: C04B 24/42 Organo-silicon compounds
• CPC Class Codes: C04B 28/006 containing mineral polymers, e.g. geopolymers of the Davidovits type
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: Y02P 40/10 Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The present invention relates to mono- and bisalkylenetrialkoxysilanes of the general formula (I),

• • in which:
  • —Y— is —O— or —N(R⁹)_2-a—;
  • —Z— is in each case identical or different and selected from the group consisting of —O— and —CHR^4b—;
  • a is 1 if —Y—=—O—; and is 1 or 2 if —Y—=—N(R⁹)_2-a—;
  • m is a natural number from 1 to 20;
  • n is a natural number from 7 to 200;
  • R¹ is in each case identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; and
  • R², R³, R^4a, R^4b, R⁵, R⁶, R⁷R⁸, and R⁹ in each case independently are H, suitable linear or branched C₁-C₂₀-alkyl, or optionally C₂-C₂₀-alkenyl, C₂-C₂₀-alkynyl, C₁-C₂₀-alkanoyl, C₃-C₂₀-alkenoyl, ω-carboxy-(C₁-C₆-alkyl)carbonyl, and ω-carboxy-(C₂-C₆-alkenyl)carbonyl and/or C₇-C₂₀-aryloyl;
    to processes for preparing them and to their use as dispersants in aqueous suspensions composed of aggregates and hydraulic binders; and to these aqueous suspensions as such.

Claims

1. :

A mono- or bisalkylenetrialkoxysilane of the formula (I);

2. :

The alkylenetrialkoxysilane according to claim 1, wherein;

—

Z—

=—

O—

; and

R², R³, and R^4a are in each case identical or different and selected from the group consisting of H and linear or branched C₁-C₁₀-alkyl.

3. :

The alkylenetrialkoxysilane according to claim 1, wherein;

m=3; and

R⁵=H.

4. :

The alkylenetrialkoxysilane according to claim 1, wherein;

—

Z—

is —

CHR^4b; and

R² together with R^4b forms an alkylene chain —

R²—

R^4b—

, the alkylene chain being selected from —

C(R⁵)₂— and

—

C(R⁵)₂—

C(R⁵)₂—

; and

R³ and R^4a are in each case identical or different and selected from the group consisting of H and linear or branched C₁-C₁₀-alkyl.

5. :

The alkylenetrialkoxysilane according to claim 1, wherein the alkylenetrialkoxysilane has the formula (I-d11);

6. :

The alkylenetrialkoxysilane according to claim 1, wherein;

—

Y—

=—

N(R⁹)_2-a—

; and

a=1 or 2.

7. :

The alkylenetrialkoxysilane according to claim 1, wherein;

—

Y—

=—

O—

; and

a=1.

8. :

The alkylenetrialkoxysilane according to claim 1, wherein R⁸=H.

9. :

The alkylenetrialkoxysilane according to claim 1, wherein R⁸ is selected from the group consisting of a carboxy-(C₁-C₆-alkyl)carbonyl and a carboxy-(C₂-C₆-alkenyl)carbonyl.

10. :

The alkylenetrialkoxysilane according to claim 1, wherein n is a natural number from 21 to 120.

11. :

The alkylenetrialkoxysilane according to claim 1, wherein R⁶=H.

12. :

The alkylenetrialkoxysilane according to claim 1, wherein R⁷ is selected from the group consisting of methyl and acetyl.

13. :

A process for forming an aqueous suspension, the process comprising adding a dispersant to a mixture comprising an aggregate and a hydraulic binder, to obtain the aqueous suspension, wherein the dispersant is at least one alkylenetrialkoxysilane of claim 1.

14. :

The process according to claim 13, wherein the hydraulic binder is selected from the group consisting of a cement and a geopolymeric silicate binder.

15. :

An aqueous suspension, comprising;

an aggregate;

a hydraulic binder; and

a dispersant comprising the alkylenetrialkoxysilane according to claim 1.

16. :

A process for preparing the alkylenetrialkoxysilane according to claim 1, the process comprising;

(i) β

-hydroxyalkylating a polyether alcohol or polyether amine of formula (II);