Antifoaming agents and use thereof in detergents

Patent metadata

Field	Value
Publication number	US-9387417-B2
Application number	US-201314409294-A
Country	US
Kind code	B2
Filing date	Jun 13, 2013
Priority date	Jun 18, 2012
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

Antifoam powders with delayed anti-foaming action, contain
(1) 5 to 35% by weight of an anti-foaming agent which is an amino-functional organopolysiloxane and consists of at least one siloxane unit of the formula

R
a
1

⁢

Q
b

⁢

SiO

4
-

(

a
+
b

)

2

(
I
)

and siloxane units of the general formula

R c 1 ⁢ SiO 4 - c 2 ( II )
where

Q is an amino group of the general formula

—R 2 —[NR 3 —(CH 2 ) m —] x NR 4 R 5   (III)

or forms thereof with partial or full protonation on the nitrogen atoms,
(2) 65 to 95% by weight of a carrier material selected from the group of sodium carbonate, sodium sulphate, aluminium silicate, potassium carbonate, potassium sulphate, sodium hydrogencarbonate, potassium hydrogencarbonate, zeolites, and mixtures thereof.

First claim

The invention claimed is:

1. An anti-suds powder with delayed anti-sudsing action, comprising
(1) 5 to 35% by weight of an anti-sudsing agent which is an amino-functional organopolysiloxane and consists of at least one siloxane unit of the formula

R
a
1

⁢

Q
b

⁢

SiO

4
-

(

a
+
b

)

2

(
I
)

and siloxane units of the general formula

R
c
1

⁢

SiO

4
-
c

2

(
II
)

where
R 1 is the same or different and is a hydrogen atom, a monovalent, optionally fluorine-, chlorine- or bromine-substituted C 1 - to C 18 -hydrocarbyl radical or a C 1 - to C 12 -alkoxy radical or a hydroxyl radical,
Q is an amino group of the formula
—R 2 —[NR 3 —(CH 2 ) m —] x NR 4 R 5   (III)

or partially or fully protonated forms thereof, and mixtures thereof
where
R 2 is a divalent C 1 -C 18 -hydrocarbyl radical,
R 3 is a hydrogen atom or a C 1 -C 10 -alkyl radical,
R 4 is a hydrogen atom or a C 1 -C 10 -alkyl radical,
R 5 is a hydrogen atom or a C 1 -C 10 -alkyl radical,
a is 0, 1 or 2,
b is 1, 2 or 3,
c is 0, 1, 2 or 3,
m is 2, 3 or 4, and
x is 0, 1 or 2,
and the sum of a+b is less than or equal to 3,
(2) 65 to 95% by weight of a sodium carbonate, sodium sulphate, aluminium silicate, potassium carbonate, potassium sulphate, sodium hydrogencarbonate, potassium hydrogencarbonate, or zeolite carrier material, with the proviso that the anti-suds powder is free of silicas.

2. The anti-suds powder of claim 1 , wherein at least one amino-functional organopolysiloxanes (1) has the formula
Q k R 1 3-k SiO(R 2 SiO) m (QR 1 SiO) n SiR 1 3-k Q k   (IV)

where
R is the same or different and is a monovalent C 1 - to C 18 -hydrocarbyl radical,
k is 0 or 1,
m is 0 or an integer from 1 to 1000,
n is 0 or an integer from 1 to 50,
with the proviso that the organopolysiloxanes contain at least one Q radical per molecule.

3. The anti-suds powder of claim 1 , wherein Q is a radical of the formula NH 2 CH 2 CH 2 NH(CH 2 ) 3 — or partially or fully protonated forms thereof N + H 3 CH 2 CH 2 NH(CH 2 ) 3 —Z − or N + H 3 CH 2 CH 2 N + H 2 (CH 2 ) 3 -2Z − , where Z − is an anion to N + .

4. The anti-suds powder of claim 3 , wherein Z − is an anion of a carboxylic acid.

5. The anti-suds powder of claim 3 , wherein Z − is an anion of acetic acid.

6. The anti-suds powder of claim 2 , wherein Q is a radical of the formula NH 2 CH 2 CH 2 NH(CH 2 ) 3 — or partially or fully protonated forms thereof N + H 3 CH 2 CH 2 NH(CH 2 ) 3 —Z − or N + H 3 CH 2 CH 2 N + H 2 (CH 2 ) 3 -2Z − , where Z − is an anion to N + .

7. The anti-suds powder of claim 1 , wherein R 1 is a C 1 - to C 18 -hydrocarbyl radical, a C 1 - to C 3 -alkoxy radical, or a hydroxyl radical.

8. The anti-suds powder of claim 2 , wherein R 1 is a C 1 - to C 18 -hydrocarbyl radical, a C 1 - to C 3 -alkoxy radical, or a hydroxyl radical.

9. A process for producing an anti-suds powder of claim 1 , comprising mixing the amino-functional organopolysiloxane (1) with the carrier material (2).

10. A process for producing an anti-suds powder of claim 2 , comprising mixing the amino-functional organopolysiloxane (1) with the carrier material (2).

11. A process for producing an anti-suds powder of claim 3 , comprising mixing the amino-functional organopolysiloxane (1) with the carrier material (2).

12. A process for producing an anti-suds powder of claim 6 , comprising mixing the amino-functional organopolysiloxane (1) with the carrier material (2).

13. A detergent composition comprising
(A) at least one anti-sudsing agent (1) of claim 1 or an anti-suds powder comprising anti-sudsing agent (1) and carrier material (2), and
(B) customary detergent components.

14. A detergent composition comprising
(A) at least one anti-sudsing agent (1) of claim 2 or an anti-suds powder comprising anti-sudsing agent (1) and carrier material (2), and
(B) customary detergent components.

Assignees

• Wacker Chemie Ag

Inventors

• Merget Markus
• Becker Richard

Classifications

• C11D3/128

  Aluminium silicates, e.g. zeolites (C11D3/1253 takes precedence) · CPC title

• B01D19/0413 Primary

  compounds containing N-atoms · CPC title

• B01D19/0409

  compounds containing Si-atoms · CPC title

• C11D3/3742

  Nitrogen containing silicones · CPC title

• C11D7/14

  Silicates · CPC title