US4732694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suds suppressor compositions and their use in detergent compositions
Assignee: Procter and Gamble Co
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Filing: 1986-07-02
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Granted: 1988-03-22
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Expires: 2006-07-02
Abstract
Abstract A suds suppressor composition comprising, as suds-suppressor, a blend of: (i) a high shear mix of polydimethylsiloxane (PDMS) and hydrophobic silica, the PDMS having a viscosity of from about 20 to about 12,500 cs, and (ii) PDMS having a viscosity of at least about 25,000 cs wherein the blend has a viscosity of at least about 18,000 cs, the suds suppressor being dispersed in a water-soluble or water-dispersible organic carrier comprising: (i) from about 1% to about 100% of a first carrier component melting in the range of about 38 DEG C. to about 90 DEG C. and from 0% to about 99% of a second carrier component which is an ethoxylated nonionic surfactant melting in the range from about 5 DEG C. to about 36 DEG C. The compositions are particularly suitable in high-active containing heavy duty detergent compositions and provide improved foam regulation across the range of wash temperature, product usage, soil, load and rinsing conditions.
Inventors
- 👤 Maxim S. Gowland
- 👤 Stephen A. Johnson
- 👤 Russell Pell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:38
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3703; C11D3/373; C11D3/3738; C11D3/0005; C11D3/0026; Y; Y10; Y10S; Y10S516/00; Y10S516/924; Y10S516/929; Y10S516/931
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
205 words
A process for preparing a suds suppressor composition, said process comprising the steps of (a) forming a high shear mix of polydimethylsiloxane and hydrophobic silica suds suppressing agents in a weight ratio of polydimethylsiloxane to hydrophobic silica in the range from 75:25 to about 99:1, the polydimethylsiloxane having a viscosity at 25° C. in the range from about 20 to about 12,500 cs, (b) forming a dispersion of (i) the product of step (a) and (ii) polydimethylsiloxane suds suppressing agent having a viscosity at 25° C. of at least about 25,000 cs in (iii) a water-soluble or water-dispersible organic carrier, the combination of (i) and (ii) having a viscosity at 25° C. of at least about 18,000 cs, said water-soluble or water-dispersible organic carrier comprising from about 1% to 100% by weight of a first organic carrier component having a melting point in the range from about 38° C. to about 90° C., and from 0% to about 99% by weight of a second organic carrier component selected from the group consisting of ethoxylated nonionic surfactants having a hydrophilic-lipophilic balance (HLB) in the range from about 9.5 to about 13.5 and a melting point in the range from about 5° C. to about 36° C.
Claim 2
Dependent Claim
205 words
A process for preparing a suds suppressor composition, said process comprising the steps of (a) forming a high shear mix of polydimethylsiloxane and hydrophobic silica suds suppressing agents in a weight ratio of polydimethylsiloxane to hydrophobic silica in the range from 75:25 to about 99:1, the polydimethylsiloxane having a viscosity at 25° C. in the range from about 20 to about 12,500 cs, (b) forming a dispersion of (i) the product of step (a) and (ii) polydimethylsiloxane suds suppressing agent having a viscosity at 25° C. of at least about 25,000 cs in (iii) a water-soluble or water-dispersible organic carrier, the combination of (i) and (ii) having a viscosity at 25° C. of at least about 18,000 cs, said water-soluble or water-dispersible organic carrier comprising from about 1% to 100% by weight of a first organic carrier component having a melting point in the range from about 38° C. to about 90° C., and from 0% to about 99% by weight of a second organic carrier component selected from the group consisting of ethoxylated nonionic surfactants having a hydrophilic-lipophilic balance (HLB) in the range from about 9.5 to about 13.5 and a melting point in the range from about 5° C. to about 36° C.
Claim 3
Dependent Claim
63 words
A process as recited in claim 1 wherein step (b) comprises blending the product of step (a) and the polydimethylsiloxane having a viscosity at 25° C. of at least about 25,000 cs to form a premix which is said combination having a viscosity at 25° C. of at least about 18,000 cs, and dispersing said premix in said water-soluble or water-dispersible organic carrier.
Claim 4
Dependent Claim
58 words
A process as recited in claim 2 wherein in step (b) the polydimethylsiloxane suds suppressing agent having a viscosity at 25° C. of at least about 25,000 cs has a viscosity at 25° of from about 50,000 to about 100,000 cs and said combination having a viscosity at 25° C. of from about 25,000 to about 60,000 cs.
Claim 5
Dependent Claim
45 words
A process as recited in claim 3 wherein the product of step (a) and the polydimethylsiloxane suds suppressing agent having a viscosity at 25° C. of from about 50,000 to about 100,000 cs are in a weight ratio of from about 4:1 to about 1:4.
Claim 6
Dependent Claim
82 words
A process as recited in claim 4 wherein the first organic carrier component comprises an ethoxylated nonionic surfactant having an HLB in the range from about 15 to about 19, and a melting point in the range from about 38° C. to 60° C. and said carrier comprises from about 1% to about 50% by weight of the first carrier component and from about 50% to about 99% by weight of the second carrier component, thereby to produce a stable sprayable composition.
Claim 7
Dependent Claim
16 words
A process recited in claim 5 wherein silicone-oxyalkylene copolymer dispersing agent is added in step (b).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |