# US 10,870,732 B2 · Defoamer compositions for detergents

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- Number: US 10,870,732 B2
- Document ID: US10870732B2
- Status: Granted
- Kind: B2
- Application number: 16/081,789
- Filed: 2017-02-21
- Published: 2020-05-28
- Granted: 2020-12-22
- Earliest claimed: 2016-03-01
- Assignees: Wacker Chemie AG
- Applicants: Wacker Chemie AG
- Inventors: Holger Rautschek; Richard Becker; Christof Brehm
- Web page: https://patentgrep.com/patent/US10870732B2

## CPC

- C08G 77/46: containing polyether sequences
- C08L 83/04: Polysiloxanes
- C08G 77/16: to hydroxy groups
- C08G 77/18: to alkoxy or aryloxy groups
- C08G 77/20: containing silicon bound to unsaturated aliphatic groups
- C08G 77/80: {Siloxanes having aromatic substituents, e.g. phenyl side groups}
- C08K 3/36: Silica
- C08L 83/00: Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C11D 3/0026: {Low foaming or foam regulating compositions}
- C11D 3/124: {Silicon containing, e.g. silica, silex, quartz or glass beads}
- C11D 3/162: {containing Si}
- C11D 3/3707: {Polyethers, e.g. polyalkyleneoxides}
- C11D 3/373: {containing silicones}
- C11D 3/378: {(Co)polymerised monomers containing sulfur, e.g. sulfonate}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

Defoamer preparations contain a polyorganosiloxane having aryl groups bonded to silicon at a ring carbon, filler particles and/or silicone resin particles, and a polyoxyalkylene polyether containing oxypropylene moieties. In addition to being efficient and compatible, the defoamer compositions retain their efficiency, especially in liquid detergents, after storage.

## Claims

### Claim 1

A defoamer preparation, comprising
(A) a defoamer composition, comprising
(a1) at least one organosilicon compound comprising units of the formula
Ra(R1O)bR2cSiO(4-a-b-c)/2 (I)
in which
R is the same or different and is hydrogen or a monovalent, SiC-bonded, optionally substituted, aliphatic hydrocarbyl radical, or aromatic hydrocarbyl radical bonded to silicon via aliphatic groups,
R1 is the same or different and is hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
R2 is the same or different and is a monovalent, optionally substituted, aromatic hydrocarbyl radical bonded to silicon via a ring carbon atom,
a is 0, 1, 2 or 3,
b is 0, 1, 2 or 3 and
c is 0, 1, 2 or 3,
with the proviso that the sum total of a+b+c is not more than 3 and, in 1-100% of all units of the formula (I), c is different than 0 and, in at least 50% of all units of the formula (I), the sum total of a+b+c in the organosilicon compound is 2,
(a2) at least one additive selected from
(a21) filler particles and/or
(a22) organopolysiloxane resin(s) comprising units of the formula
R3d(R4O)eSiO(4-d-e)/2 (II)
in which
R3 is the same or different and is hydrogen or a monovalent, optionally substituted, SiC-bonded hydrocarbyl radical,
R4 is the same or different and is hydrogen or a monovalent, optionally substituted hydrocarbyl radical,
d is 0, 1, 2 or 3 and
e is 0, 1, 2 or 3,
with the proviso that the sum total of d+e is not more than 3 and, in less than 50% of all units of the formula (II), the sum total of d+e in the organopolysiloxane resin is 2,
and optionally
(a3) an organosilicon compound comprising units of the formula
R5g(R6O)hSiO(4-g-h)/2 (III)
in which
R5 is the same or different and has the definition specified for R,
R6 is the same or different and has the definition specified for R′,
g is 0, 1, 2 or 3 and
h is 0, 1, 2 or 3,
with the proviso that the sum total of g+h is not more than 3 and, in at least 50% of all units of the formula (III), the sum total of g+h in the organosilicon compound is 2,
(B) polypropylene glycols, terminally etherified or esterified polypropylene glycols, polypropylene glycol/polyethylene glycol copolymers, terminally etherified or esterified polypropylene glycol/polyethylene glycol copolymers, and mixtures thereof,
(C) optionally, polyether-modified siloxanes,
(D) optionally, organic compounds, and
(F) optionally, further additives.

### Claim 2 (depends on 1)

The defoamer preparation of claim 1, wherein R is a monovalent aliphatic hydrocarbyl radical having 1 to 4 carbon atoms, and R2 is an aryl radical.

### Claim 3 (depends on 1)

The defoamer preparation of claim 1, wherein R is methyl and R2 is phenyl.

### Claim 4 (depends on 1)

The defoamer preparation of claim 1, wherein 10 to 100 mol % of the SiC-bonded radicals in component (a1) are R2 radicals.

### Claim 5 (depends on 2)

The defoamer preparation of claim 2, wherein 10 to 100 mol % of the SiC-bonded radicals in component (a1) are R2 radicals.

### Claim 6 (depends on 1)

The defoamer preparation of claim 1, wherein water is additionally present in amounts of not more than 5% by weight, based in each case on the total weight of the defoamer preparation.

### Claim 7 (depends on 1)

The defoamer preparation of claim 1, wherein water is additionally present in amounts of not more than 1% by weight, based in each case on the total weight of the defoamer preparation.

### Claim 8 (depends on 1)

The defoamer preparation of claim 1, wherein no additional water is present.

### Claim 9 (depends on 1)

The defoamer preparation of claim 1, wherein component (a22) comprises organopolysiloxane resins consisting essentially of R33SiO1/2 (M) and SiO4/2 (Q) units, and the molar ratio of M to Q units is in the range of from 0.5 to 2.0 and up to 10% by weight of Si-bonded hydroxy or alkoxy groups are optionally present.

### Claim 10 (depends on 1)

The defoamer preparation of claim 1, wherein component (a21) comprises silicas having a BET surface area of 50 to 800 m2/g.

### Claim 11 (depends on 1)

The defoamer preparation of claim 1, wherein component (B) comprises at least one polyoxyalkylene of the formula
R7—[O—CH2—CH(CH3)]x—[O—CH2—CH2]y—O—R7 (IV)
in which R7 is the same or different and is hydrogen, a C1-C30-alkyl radical, a C1-C30-alkenyl radical or a radical of the formula R8—C(O)— (V),
R8 is a C1-C22-alkyl radical,
x has a value of 6 to 300 and
y has a value of 0 to 30
and the ratio y/x is 0 to 1.

### Claim 12 (depends on 1)

The defoamer preparation of claim 1, comprising:
10% to 90% by weight of defoamer composition (A)
10% to 90% by weight of (B)
0 to 10% by weight of polyether-modified siloxanes (C)
0% to 20% by weight of organic compounds (D)
0 to 1% by weight of water (E), and
0% to 10% by weight of further additives (F)
based in each case on the total weight of the defoamer composition.

### Claim 13 (depends on 1)

A surfactant formulation comprising a defoamer preparation of claim 1.

### Claim 14 (depends on 13)

The surfactant formulation of claim 13, which is a wetting agent, washing composition, or cleaning composition.

### Claim 15 (depends on 1)

A method of defoaming and/or preventing foaming of a medium comprising mixing at least one defoamer preparation of claim 1 with the medium.

### Claim 16 (depends on 15)

The method of claim 15, wherein the medium is an aqueous medium.

### Claim 17 (depends on 15)

The method of claim 15, wherein the defoamer composition is added to the medium in amounts of 0.1 ppm by weight to 1% by weight.

### Claim 18 (depends on 1)

The defoamer preparation of claim 1, wherein component (B) has a solubility in water of less than 2% by weight at 25° C. and 1013 hPa.