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US4141748A Expired / Lapsed US ⏱️ 0.0 years remaining

Aerosol starch composition

Assignee: Kao Corp
•
Filing: 1977-07-26
•
Granted: 1979-02-27
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Expires: 1997-07-26
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Abstract

Abstract An aerosol starch composition consists essentially of 5 to 30 wt % of a propellant and 70 to 95 wt % of a liquid composition consisting essentially of 2 to 10 wt % of a modified starch, 0.1 to 2 wt % of a poorly water-soluble polyalkylene glycol or derivative thereof and the balance is water.

Inventors

  • 👤 Kinjiro Matsunaga
  • 👤 Yukiko Sone
  • 👤 Yunosuke Nakagawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 16:25
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11; C; C08; C08L; C08L3/00; C08L3/04; C08L3/08; C09; C09K; C09K3/00; C09K3/30; D06M23/00; D06M23/06

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 269 words
In a pressurized container having a discharge valve and charged with a self-propelling composition which can be dispensed in an aerosol mist form when said discharge valve is opened, the improvement which comprises: said composition consists essentially of (A) 5 to 30 wt % of a liquified normally gaseous propellant effective for discharging an aerosol of the composition when said discharge valve is opened and (B) 70 to 95 wt % of a liquid composition consisting essentially of (i) 2 to 10 wt %, based on the weight of (B), of a modified starch selected from the group consisting of hydroxyalkylated starch containing hydroxyalkyl groups having 2 to 4 carbon atoms and carboxyalkylated starch containing carboxyalkyl groups having 2 to 4 carbon atoms, wherein said modified starch has the property that a 5% aqueous solution of said modified starch has a viscosity of 5 to 30 cp, at 20° C., (ii) 0.1 to 2 wt %, based on the weight of (B), of a material selected from the group consisting of polypropylene glycol having a molecular weight of 1,000 to 20,000, polybutylene glycol having a molecular weight of 500 to 10,000, an adduct of propylene oxide to a polyhydric alcohol having from 2 to 6 carbon atoms wherein said propylene oxide adduct has a molecular weight of 1,500 to 10,000 and an adduct of butylene oxide to a polyhydric alcohol having 2 to 6 carbon atoms wherein said butylene oxide adduct has a molecular weight of 1,500 to 10,000, said material having a water solubility of not more than 2%, at 25° C., and (iii) the balance is water.
Claim 2
Dependent Claim 269 words
In a pressurized container having a discharge valve and charged with a self-propelling composition which can be dispensed in an aerosol mist form when said discharge valve is opened, the improvement which comprises: said composition consists essentially of (A) 5 to 30 wt % of a liquified normally gaseous propellant effective for discharging an aerosol of the composition when said discharge valve is opened and (B) 70 to 95 wt % of a liquid composition consisting essentially of (i) 2 to 10 wt %, based on the weight of (B), of a modified starch selected from the group consisting of hydroxyalkylated starch containing hydroxyalkyl groups having 2 to 4 carbon atoms and carboxyalkylated starch containing carboxyalkyl groups having 2 to 4 carbon atoms, wherein said modified starch has the property that a 5% aqueous solution of said modified starch has a viscosity of 5 to 30 cp, at 20° C., (ii) 0.1 to 2 wt %, based on the weight of (B), of a material selected from the group consisting of polypropylene glycol having a molecular weight of 1,000 to 20,000, polybutylene glycol having a molecular weight of 500 to 10,000, an adduct of propylene oxide to a polyhydric alcohol having from 2 to 6 carbon atoms wherein said propylene oxide adduct has a molecular weight of 1,500 to 10,000 and an adduct of butylene oxide to a polyhydric alcohol having 2 to 6 carbon atoms wherein said butylene oxide adduct has a molecular weight of 1,500 to 10,000, said material having a water solubility of not more than 2%, at 25° C., and (iii) the balance is water.
Claim 3
Dependent Claim 28 words
An aerosol starch composition as claimed in claim 1, in which said modified starch is a hydroxyalkylated starch containing a hydroxyalkyl group having 2 or 3 carbon atoms.
Claim 4
Dependent Claim 23 words
An aerosol starch composition as claimed in claim 1, in which the amount of said material is from 0.2 to 1 wt %.
Claim 5
Dependent Claim 25 words
An aerosol starch composition as claimed in claim 1, in which the water solubility of said material is not more than 0.1%, at 25° C.
Claim 6
Dependent Claim 24 words
An aerosol starch composition as claimed in claim 1, in which said material is polypropylene glycol having a molecular weight of 1,000 to 20,000.
Claim 7
Dependent Claim 26 words
An aerosol starch composition as claimed in claim 1, in which said material is a glycerin-propylene oxide adduct having a molecular weight of 1,500 to 10,000.
Claim 8
Dependent Claim 15 words
An aerosol starch composition as claimed in claim 1, in which said propellant is LPG.

References Cited (Backward Citations)

US3117014A Cited
US3547854A Cited
US3686120A Cited
US4023978A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-02-26 1982-08-28 1983-02-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-02-26 1986-08-28 1987-02-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-02-26 1990-08-28 1991-02-27 $7700.00 Window Closed / Lapsed

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