Granulated foam control composition comprising a polyol ester and cationic polymer

• US 9,040,474 B2
• Filed: 12/09/2011
• Issued: 05/26/2015
• Est. Priority Date: 12/10/2010
• Status: Expired due to Fees

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: L'Hostis, Jacqueline, Song, Haiyan, Tang, Ming, Panandiker, Rajan Keshav, Alain Creutz, Serge Firmin, DePaepe, Olivia
• Primary Examiner(s): BOYER, CHARLES I
• Application Number:
  US13/991,663
• Publication Number:
  US 20140024571A1
• Time in Patent Office: 1,264 Days
• Field of Search: 510/276, 510/317, 510/343, 510/347, 510/349, 510/466
• US Class Current: 510/317
• CPC Class Codes: B01D 19/0409 compounds containing Si-atoms
• CPC Class Codes: B01D 19/0431 containing aromatic rings
• CPC Class Codes: C11D 3/0026 Low foaming or foam regulating compositions
• CPC Class Codes: C11D 3/3738 Alkoxylated silicones

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

1. A granulated foam control composition comprising

(A) a foam control agent comprising

(i) a polydiorganosiloxane fluid comprising units of the formula

2. 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

3. 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

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

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

10. 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

11. 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.

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

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

14. 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.

15. 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).