Hair relaxer
First Claim
Patent Images
1. A hair relaxer system in at least two packages comprising:
- (a) a first package containing a substantially water-free activator that includes a hydrolyzable organic base having a pKa value of at least 12 that is dissolved in an organic solvent, said organic base being present in free base form in an amount of at least 0.05 moles, sufficient to relax hair and in molar-excess over free and combined water of at least 70 mole percent, said organic solvent being immiscible with petrolatum at a temperature of 25°
C.; and
(b) a second package containing water;
the contents of said first and second packages when admixed forming a relaxer composition having a pH value of at least 12, and containing at least 20 weight percent water.
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Abstract
A hair relaxing system, activator and methods of use and preparation are disclosed. The system includes a first package containing a substantially water-free activator that includes a hydrolyzable organic base having a PKa value of at least about 12 present in free base form in an amount sufficient to relax hair dissolved in an organic solvent that is immiscible with petrolatum. The second package of the system contains water and may also contain oleaginous materials and emulsifiers. Admixture of the first and second packages provides a relaxer composition that has a pH value of at least 12 and contains at least about 20 weight percent water.
54 Citations
31 Claims
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1. A hair relaxer system in at least two packages comprising:
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(a) a first package containing a substantially water-free activator that includes a hydrolyzable organic base having a pKa value of at least 12 that is dissolved in an organic solvent, said organic base being present in free base form in an amount of at least 0.05 moles, sufficient to relax hair and in molar-excess over free and combined water of at least 70 mole percent, said organic solvent being immiscible with petrolatum at a temperature of 25°
C.; and(b) a second package containing water;
the contents of said first and second packages when admixed forming a relaxer composition having a pH value of at least 12, and containing at least 20 weight percent water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 20, 25)
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8. A hair relaxer system in at least two packages comprising:
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(a) a first package containing a substantially water-free activator that includes a hydrolyzable organic base having a pKa value of at least 12 that is dissolved in a polyhydroxy lower alkane, said organic base being present in free base form in an amount of at least 0.05 moles, sufficient to relax hair and in molar excess over free and combined water of at least 70 mole percent; and (b) a second package containing an oleaginous material selected from the group consisting of mineral oil, petrolatum, mineral jelly and mixtures thereof emulsified in water; the contents of said first and second packages when admixed forming a relaxer composition having a pH value of at least about 13, and containing at least 30 weight percent water. - View Dependent Claims (9, 10, 11, 12, 13, 14, 21, 22, 24)
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15. A hair relaxer system in at least two packages comprising:
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(a) a first package containing a substantially water-free activator that includes guanidine dissolved in propylene glycol, said guanidine being present in the free base form in an amount of at least 0.05 moles, sufficient to relax hair, said package having a total content of free and combined water not higher than 5 weight percent of the weight of guanidine therein; and (b) a second package containing an oleaginous material selected from the group consisting of mineral oil, petrolatum, mineral jelly and mixtures thereof emulsified in water;
the contents of said first and second packages when admixed forming a relaxer composition emulsion having a pH value of at least about 13, about 30 to about 50 weight percent water and being stable to phrase separation at 25°
C. for at least one hour after formation. - View Dependent Claims (16, 17, 18, 19, 23, 26)
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- 27. An activator for a hair relaxing composition comprising a hydrolyzable organic base having a pKa value of at least 12 that is dissolved in a polyhydroxy lower alkane, said organic base being present in free base form in an amount of at least 0.05 moles and sufficient to relax hair, and said activator being substantially free of water and said organic base being in molar excess over free and combined water of at least 70 mole percent.
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31. An activator for a hair relaxing composition comprising a substantially water-free solution of guanidine free base dissolved in propylene glycol, said activator when admixed with water forming a relaxer composition having a pH value of at least 12, containing an amount of guanidine of at least 0.05 moles, which, amount is effective to relax hair, said substantially water-free solution being one in which the total content of free and combined water is not higher than 5 weight percent of the weight of guanidine free base therein.
Specification