SELF-HEATING COMPOSITION

• US 3,585,982 A
• Filed: 06/25/1969
• Issued: 06/22/1971
• Est. Priority Date: 06/25/1969
• Status: Expired due to Term

• Current Assignee: James A. Hollinshead
• Original Assignee: James A. Hollinshead
• Inventors: Hollinshead, James A.
• Application Number:
  US04/836,314
• Time in Patent Office: 727 Days
• US Class Current: 126/263.1
• CPC Class Codes: A45D 27/02 Lathering the body; Producing lather shaving-brushes A46B
• CPC Class Codes: A61K 2800/242 Exothermic; Self-heating; Heating sensation
• CPC Class Codes: A61K 8/02 characterised by special physical form
• CPC Class Codes: A61Q 9/02 Shaving preparations
• CPC Class Codes: B65D 75/5811 and defining, after tearing, a small dispensing spout, a small orifice or the like

Abstract

The present invention is concerned with self-heating compositions and more specifically with self-heating cosmetic compositions such as aqueous shaving creams. In the compositions disclosed herein, at least one of the components of a heatgenerating combination are encapsulated in rupturable capsules and dispersed in the composition. In especially useful embodiments, the capsules have melting points at or below the temperatures which will be generated in the composition.

Claims

2. A self-heating composition as defined in claim 1 wherein the encapsulating material has a melting point which is at or below the temperature which is generated in the composition when said heat-generating components effect the exothermic reaction.

3. A self-heating composition as defined in claim 2 which includes a foam-generating material, said foam-generating material being a liquid at room temperature and having a boiling point which is below the temperature which is generated in the composition when said heat-generating components effect the exothermic reaction.

4. A self-heating composition as defined in claim 1 which includes a foam-generating material, said foam-generating material being a liquid at room temperature and having a boiling point which is below the temperature which is generated in the composition when said heat-generating components effect the exothermic reaction.

5. A self-heating composition as defined in claim 1 in which said composition is a shaving cream.

6. A self-heating composition as defined in claim 4 wherein said composition is a shaving cream.

7. A self-heating composition as defined in claim 4 wherein said foam-generating material is encapsulated into a plurality of frangible capsules which are dispersed in said composition, the encapsulating material for said capsules being both inert and impermeable with respect to said composition and said foam-generating material.

8. A single-use packet containing a self-heating composition, said packet Comprising an enclosed chamber in which said composition is disposed, said chamber being bound by at least one resilient wall and having a dispensing opening which is closed off by a removable closure, said composition comprising a combination of at least first and second heat-generating components which when in contact with one another effect an exothermic reaction;

at least one of said components being encapsulated in at least one frangible capsule which is positioned in the packet contiguous with the composition, the wall material of said capsule being both inert and impermeable with respect to said composition and said heat-generating components.

9. A packet as defined in claim 8 wherein said composition also comprises a foam-generating material, said foam-generating material being a liquid at room temperature and having a boiling point below the temperature which is generated in the composition when said heat-generating components effect the exothermic reaction.

10. A packet as defined in claim 9 in which said composition is a shaving cream.

11. A packet as defined in claim 9 wherein said foam-generating material is encapsulated in at least one frangible capsule which is positioned within the packet contiguous said composition, the encapsulating material for said capsule being both inert and impermeable with respect to said composition and said heat-generating composition.

12. A packet as defined in claim 11 in which said composition is a shaving cream.

13. A packet as defined in claim 8 in which said composition is a shaving cream.

14. An aqueous self-heating composition which is capable of evolving heat over a prolonged period, said composition comprising a combination of at least first and second heat-generating components which in contact with one another effect an exothermic reaction said combination of heat-generating components being present in amounts in excess of that which is required to bring the composition to a desired specified temperature, at least one of said components which is nonaqueous being encapsulated into a plurality of frangible capsules which are dispersed in said composition, the encapsulating material for said capsules being both inert and impermeable with respect to the aqueous composition and the heat-generating components and having a melting point at or below said specified temperature whereby upon rupturing at least that portion of the capsules which will bring at least a portion of the composition above said melting point, the unruptured capsules will gradually melt over a prolonged period and continuously release additional quantities of the heat-generating component.

15. A self-heating composition as defined in claim 14 which includes a foam-generating material which is encapsulated into a plurality of frangible capsules which are dispersed in said composition, the encapsulating material for said capsules being both inert and impermeable with respect to said composition and having a melting point at or below said specified temperature whereby said capsules will be melted over a prolonged period and continuously release additional quantities of said foam-generating material.

16. An aqueous self-heating composition which rises gradually to a specified temperature over a prolonged period said composition comprising a combination of at least first and second heat-generating components which in contact with one another effect an exothermic reaction, at least one of said heat-generating components which is nonaqueous being encapsulated in a plurality of encapsulating materials, said plurality of encapsulating materials being inert and impermeable with respect to said composition and said heat-generating components and having sequentially higher melting points which are above the temperature at which the aqueous composition is normally stored and at or below said specified temperature.

17. A self-heating composition as defined in claim 16 which evolves heat over a prolonged period when said composition reaches the Specified temperature said composition comprising said heat-generating components in amounts in excess of that required to elevate the composition to said specified temperature, the excess of heat-generating components being encapsulated in the encapsulating material which has the highest melting point in said plurality of encapsulating materials.