SELF-HEATING CHEMICAL COMPOSITIONS

• US 3,878,118 A
• Filed: 06/30/1972
• Issued: 04/15/1975
• Est. Priority Date: 09/06/1968
• Status: Expired due to Term

• Current Assignee: Hugh R. Watson
• Original Assignee: Hugh R. Watson
• Inventors: Watson, Hugh R.
• Primary Examiner(s): Schulz, William E.
• Application Number:
  US05/268,019
• Time in Patent Office: 1,019 Days
• Field of Search: 252/90,188.3,182,105,92,307 424/70,73 260/526 44/3 206/84 126/263
• US Class Current: 424/40
• 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: C09K 5/16 Materials undergoing chemical reactions when used

Abstract

Self-heating systems for use in producing heated compositions for example cosmetic compositions, such as shaving creams, comprising an oxidant part and a reductant part, wherein the reductant is a substituted glyoxylic acid or a salt thereof.

Claims

1. A SELF-HEATING SYSTEM COMORISING AN OXIDANT SELECTED FROM THE GROUP CONSISTING OF HYDROGEN PEROXIDE AND COMPLEXES THEREOF WITH UREA, AND A REDUCTANT SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED GLYOXYLIC ACIDS AND SALTS THEREOF, WHEREIN THE SUBSTITUENT IN THE SUBSTITUTED GLYOXYLIC ACIDS AND SALTS THEREOF IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF SUBSTITUTED AND UNSUBSTITUTED PHENYL GROUPS AND THE MOLAR RATIO OF OXIDANT TO GLYOXYLIC ACID GROUPS OR GLYOXYLIC ACID SALT GROUPS IN THE REDUCTANT IS FROM 40:

60 TO 70;

30.

2. A system according to claim 1, in an aerosol container, the container having a first compartment containing the reductant and a second compartment containing the oxidant, the container being pressurised with a pressuring agent or a propellant.

3. A system according to claim 2, wherein the reductant is present in an aqueous shave foam in said first compartment and the oxidant is present in a separate aqueous phase in said second compartment.

4. A system according to claim 1, wherein the phenyl groups are substituted by at least one substituent selected from the group consisting of halo, hydroxy, primary amino, lower (C1-4) alkyl, lower (C1-4) alkoxy, carboxy, carboxycarbonyl, methylenedioxy, phenyl, substituted benzyl and substituted phenoxy.

5. A system according to claim 4, wherein the substituted benzyl substituent is carboxycarbonylbenzyl.

6. A system according to claim 4, wherein the substituted phenoxy substituent is carboxycarbonylphenoxy.

7. A system according to claim 1, wherein the reductant comprises benzoyl formic acid, 4-methoxybenzoyl formic acid or a salt thereof.

8. A system according to claim 1, wherein the salts of the substituted glyoxylic acids are selected from the group consisting of alkali metal, ammonium and substituted ammonium salts.

9. A system according to claim 1, wherein the oxidant and reductant are both aqueous.

10. A system according to claim 1, wherein the reductant is present in an aqueous phase, and the aqueous phase coNtains from 5 to 15 percent by weight of reductant, based on the total weight of the said aqueous phase.

11. A system according to claim 1, wherein the molar ratio is from 50:

50 to 60;

40.