# US 9,040,474 B2 · Granulated foam control composition comprising a polyol ester and cationic polymer

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- Number: US 9,040,474 B2
- Document ID: US9040474B2
- Status: Granted
- Kind: B2
- Application number: 13/991,663
- Filed: 2011-12-09
- Published: 2014-01-23
- Granted: 2015-05-26
- Earliest claimed: 2010-12-10
- Assignees: Dow Corning Corporation
- Applicants: Serge Firmin Alain Creutz; Jacqueline L'Hostis; Haiyan Song; Ming Tang; Rajan Keshav Panandiker; Olivia DePaepe
- Inventors: Serge Firmin Alain Creutz; Jacqueline L'Hostis; Haiyan Song; Ming Tang; Rajan Keshav Panandiker; Olivia DePaepe
- Web page: https://patentgrep.com/patent/US9040474B2

## CPC

- C11D 3/0026: {Low foaming or foam regulating compositions}
- B01D 19/0409: {compounds containing Si-atoms}
- B01D 19/0431: {containing aromatic rings}
- C11D 3/3738: {Alkoxylated silicones}
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A granulated foam control composition comprises a foam control agent based on a polydiorganosiloxane fluid, an organic additive of melting point 45″17C to 100° C. comprising a polyol ester, a water-soluble particulate inorganic carrier and a polymer having a net cationic charge. The mean number of carbon atoms in the organo groups of the polydiorganosiloxane fluid is at least 1.3. The foam control agent includes a hydrophobic filler dispersed in the polydiorganosiloxane fluid, and optionally an organosilicone resin. The polyol ester is miscible with the polydiorganosiloxane fluid.

## Claims

### Claim 1

A granulated foam control composition comprising
(A) a foam control agent comprising
(i) a polydiorganosiloxane fluid comprising units of the formula
where each group R is independently the same or different and is selected from the group of an alkyl group having from 1 to 36 carbon atoms, an aryl group, and an aralkyl group having up to 36 carbon atoms, wherein the mean number of carbon atoms in the groups R is at least 1.3;
(ii) a hydrophobic filler dispersed in the polydiorganosiloxane fluid; and
(iii) optionally an organosilicon resin;
(B) an organic additive having a melting point of from 45° C. to 100° C. and comprising a polyol ester which is a polyol fully or partially esterified by carboxylate groups each having from 7 to 36 carbon atoms and which is miscible with the polydiorganosiloxane fluid (A)(i);
(C) a water-soluble particulate inorganic carrier; and
(D) a polymer having a net cationic charge with a net charge density of from about 0.05 to about 12 meq/g and a molecular weight of from about 80,000 to about 4,000,000, wherein said polymer having a net cationic charge has a cationicity parameter of greater than 50 dalton meq/g.

### Claim 2 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polysiloxane fluid (A)(i) is a polysiloxane comprising at least 10% diorganosiloxane units of the formula
and up to 90% diorganosiloxane units of the formula
wherein X denotes a divalent aliphatic organic group bonded to silicon through a carbon atom; Ph denotes an aromatic group; Y denotes an alkyl group having from 1 to 4 carbon atoms; and Y′ denotes an aliphatic hydrocarbon group having from 1 to 24 carbon atoms.

### Claim 3 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polysiloxane fluid (A)(i) is a polysiloxane comprising 50-100% diorganosiloxane units of the formula
and optionally up to 50% diorganosiloxane units of the formula
wherein Y denotes an alkyl group having from 1 to 4 carbon atoms and Z denotes an alkyl group having from 6 to 18 carbon atoms.

### Claim 4 (depends on 1)

A granulated foam control composition according to claim 1, wherein the mixture of the organic additive (B) and the polydiorganosiloxane fluid (A)(i) has a melting point of from 45° C. to 100° C.

### Claim 5 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polyol ester is a glycerol triester substantially fully esterified by carboxylate groups each having from 14 to 22 carbon atoms.

### Claim 6 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polyol ester is a monocarboxylate or polycarboxylate in which the carboxylate groups each have from 18 to 22 carbon atoms.

### Claim 7 (depends on 1)

A granulated foam control composition according to claim 1, wherein the particulate carrier (C) is selected from the group of sodium sulfate, sodium carbonate and sodium bicarbonate.

### Claim 8 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polymer having a net cationic charge (D) has a weight average molecular weight in the range 200,000 to 4,000,000.

### Claim 9 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polymer having a net cationic charge (D) is a cationic polysaccharide.

### Claim 10 (depends on 1)

A granulated foam control composition according to claim 1, wherein the polymer having a net cationic charge (D) is a synthetic addition polymer of the general structure
wherein each R1 is independently hydrogen, C1-C12 alkyl, substituted or unsubstituted phenyl, substituted or unsubstituted benzyl, —ORa, or —C(O)ORa wherein Ra is selected from the group of hydrogen, C1-C24 alkyl and mixtures thereof; each R2 is independently hydrogen, hydroxyl, halogen, C1-C12 alkyl, —ORa, substituted or unsubstituted phenyl, substituted or unsubstituted benzyl, carbocyclic or heterocyclic; and each Z is independently hydrogen, halogen, linear or branched C1-C30 alkyl, nitrilo, N(R3)2 —C(O)N(R3)2, —NHCHO (formamide), —OR3, —O(CH2)nN(R3)2, —O(CH2)nN+(R3)3X−, —C(O)OR4; —C(O)N—(R3)2, —C(O)O(CH2)nN(R3)2, —C(O)O(CH2)nN+(R3)3X−, —OCO(CH2)nN(R3)2, —OCO(CH2)nN+(R3)3X−, —C(O)NH—(CH2)nN(R3)2, —C(O)NH(CH2)nN+(R3)3X−, —(CH2)nN(R3)2, —(CH2)nN+(R3)3X−, a non-aromatic nitrogen heterocycle comprising a quaternary ammonium ion wherein the heterocycle comprising an N-oxide moiety, an aromatic nitrogen-containing heterocycle wherein one or more of the nitrogen atoms is quaternized, or an aromatic nitrogen-containing heterocycle wherein at least one nitrogen is an N-oxide, each R3 being independently hydrogen, C1-C24 alkyl, C2-C8 hydroxyalkyl, benzyl or substituted benzyl, each R4 being independently hydrogen, C1-C24 alkyl or —(CH2—CHR5—O)m—R3, where R5 is independently hydrogen or C1-C6 alkyl, X is a water soluble anion, and n is from 1 to 6, provided that at least one Z group per molecule is selected from the group of —O(CH2)nN+(R3)3X−, —C(O)OR4, —C(O)N—(R3)2, —C(O)O(CH2)nN(R3)2, —C(O)O(CH2)nN+(R3)3X−, —OCO(CH2)nN(R3)2, —OCO(CH2)nN+(R3)3X−, —C(O)NH—(CH2)nN(R3)2, —C(O)NH(CH2)nN+(R3)3X -(CH2)nN(R3)2, —(CH2)nN+(R3)3X−, a non-aromatic nitrogen heterocycle comprising a quaternary ammonium ion wherein the heterocycle comprising an N-oxide moiety, an aromatic nitrogen-containing heterocycle wherein one or more of the nitrogen atoms is quaternized, or an aromatic nitrogen-containing heterocycle wherein at least one nitrogen is an N-oxide.

### Claim 11 (depends on 1)

A granulated foam control composition according to claim 1, wherein the foam control agent comprises an organosilicon resin (A)(iii) which is a siloxane resin consisting of monovalent trihydrocarbonsiloxy (M) groups of the formula R″3SiO1/2 and tetrafunctional (Q) groups SiO4/2 wherein R″ denotes an alkyl group and the number ratio of M groups to Q groups is in the range of from 0.4:1 to 1.1:1.

### Claim 12

A method of reducing foam during a rinsing step comprising
providing a granulated foam control composition comprising
(A) a foam control agent comprising
(i) a polydiorganosiloxane fluid comprising units of the formula
where each group R is independently the same or different and is selected from the group of an alkyl group having from 1 to 36 carbon atoms, an aryl group, and an aralkyl group having up to 36 carbon atoms, wherein the mean number of carbon atoms in the groups R is at least 1.3;
(ii) a hydrophobic filler dispersed in the polydiorganosiloxane fluid; and
(vi) optionally an organosilicon resin;
(B) an organic additive having a melting point of from 45° C. to 100° C. and comprising a polyol ester which is a polyol fully or partially esterified by carboxylate groups each having from 7 to 36 carbon atoms;
(C) a water-soluble particulate inorganic carrier; and
(D) a polymer having a net cationic charge with a net charge density of from about 0.05 to about 12 meq/g and a molecular weight of from about 80,000 to about 4,000,000, wherein said polymer having a net cationic charge has a cationicity parameter of from about 50 to about 1500 dalton meq/g; and
incorporating the granulated foam control composition into a laundry detergent powder.

### Claim 13

A method of manufacturing a granulated foam control composition comprising:
mixing
(A) a foam control agent comprising
(i) a polydiorganosiloxane fluid comprising units of the formula
where each group R is independently the same or different and is selected from the group of an alkyl group having from 1 to 36 carbon atoms, an aryl group, and an aralkyl group having up to 36 carbon atoms, wherein the mean number of carbon atoms in the groups R is at least 1.3;
(ii) a hydrophobic filler dispersed in the polydiorganosiloxane fluid; and
(iii) optionally an organosilicon resin; and
(B) an organic additive having a melting point of from 45° C. to 100° C. and comprising a polyol ester which is a polyol fully or partially esterified by carboxylate groups each having from 7 to 36 carbon atoms; and
depositing the mixture of (A) and (B) on a water-soluble particulate inorganic carrier, the mixture of (A) and (B) being in non-aqueous liquid form prior to depositing said mixture on the water-soluble particulate inorganic carrier; and
depositing (D) a polymer, having a net cationic charge with a net charge density of from about 0.05 to about 12 meq/g and a molecular weight of from about 80,000 to about 4,000,000, wherein said polymer having a net cationic charge has a cationicity parameter of from about 50 to about 1500 dalton meq/g, on the water-soluble particulate inorganic carrier in conjunction with the mixture of (A) and (B) being deposited on the water-soluble particulate inorganic carrier or after the mixture of (A) and (B) is deposited on the water-soluble particulate inorganic carrier.

### Claim 14 (depends on 13)

A method according to claim 13 in which the polymer (D) having a net cationic charge is deposited on the particulate carrier in conjunction with the mixture of (A) and (B), wherein the polymer (D) having a net cationic charge is mixed with the foam control agent (A) and the organic additive (B) prior to being deposited on the particulate carrier.

### Claim 15 (depends on 13)

A method according to claim 13 in which the polymer (D) having a net cationic charge is deposited on the particulate carrier in conjunction with the mixture of (A) and (B), wherein the polymer (D) having a net cationic charge is deposited on the particulate carrier simultaneously with deposition of the mixture of (A) and (B).