Keratin-based hair straightening formulations, methods and systems
The present invention teaches a hair straightening system including formulations that will safely and effectively straighten curly hair for at least 2-3 months after a single application, despite frequent washings of the hair. Methods for obtaining said formulations are disclosed. Hair straightening systems including shampoo and one or more conditioners are also provided.
1 . A composition, comprising:
ascorbic acid or a salt thereof;
an inorganic acid or a salt thereof having a general formula
X 2-(n+m) SO 3 H n (NH 2 ) m , wherein n is 0 or 1, m is 0 or 1, and X is a monovalent cation;
one or more crosslinking agents; and
optionally, a preservative,
wherein the composition has a pH of from about 2.45 to about 4.5.
2 . The composition of claim 1 , wherein the composition has a pH in a range of about 3.0 to about 4.5.
3 . The composition of claim 2 , wherein the composition has a pH in a range of about 3.3 to about 4.5.
4 . The composition of claim 1 , wherein the inorganic acid or salt thereof is sulfamic acid.
5 . The composition of claim 1 , wherein the composition further comprises a peptide comprising 2-100 amino acids.
6 . The composition of claim 5 , wherein the peptide comprises cysteine.
7 . The composition of claim 5 , wherein the peptide comprises a keratin protein fraction.
8 . The composition of claim 1 , wherein the crosslinking agent comprises one or more substances selected from the group consisting of ketones, hydroxyketones, activated olefin-containing compounds, polycarboxylic acids, mono-epoxy compounds, poly-epoxy compounds, carbonates, imidoesters, carbodiimides, hexamethylene diisocyanate, N-hydroxysuccinimide esters, haloacetyls, pyridyl disulfide, hydrazides, aryl azides, and combinations thereof.
9 . The composition of claim 1 , wherein the preservative comprises glycerin, ethylhexylglycerin, phenoxyethanol, grapefruit seed extract, radish root ferment filtrate, Aloe barbadensis leaf ferment filtrate, Sorbus aucuparia fruit ferment filtrate, Ribes nigrum fruit extract, Sambucus nigra fruit extract, japonica root extract, Zingiber officinale root extract, Allium sativum bulb extract, Origanum vulgare leaf extract, Thymus vulgaris leaf extract, Rosmarinus officinalis leaf extract, or a combination thereof.
10 . The composition of claim 1 , wherein the composition is substantially free of formaldehyde, monofunctional aldehydes, dialdehydes, polyfunctional aldehydes, ketoaldehydes or chemicals that release formaldehyde upon heating.
11 . A method, comprising:
applying to a quantity of hair the composition according to claim 1 having a pH of from about 2.45 to about 4.5, the composition comprising:
ascorbic acid or a salt thereof;
an inorganic acid or a salt thereof having a general formula
X 2-(n+m) SO 3 H n (NH 2 ) m , wherein n is 0 or 1, m is 0 or 1, and X is a monovalent cation;
a crosslinking agent; and
optionally, a preservative;
and heating the quantity of hair to a temperature between about 100° C. and about 235° C. while the keratin-protectant composition is applied to the hair.
12 . The method of claim 11 , wherein the quantity of hair is substantially dry when contacted with the composition.
13 . The method of claim 11 , wherein the quantity of hair is wet when contacted with the composition.
14 . The method of claim 11 , wherein heating the quantity of hair comprises heating the hair to a temperature in a range of about 100° C. to about 108° C. using a hair dryer.
15 . The method of claim 11 , wherein heating the quantity of hair comprises heating the hair to a temperature in a range of about 100° C. to about 235° C. using a flat hair iron.
16 . The method of claim 11 , wherein the composition has a pH in a range of about 3.0 to about 4.5.
17 . The method of claim 16 , wherein the composition has a pH in a range of about 3.3 to about 4.5.
18 . The method of claim 11 , wherein the inorganic acid or salt thereof is sulfamic acid.
19 . The method of claim 11 , wherein the composition further comprises a peptide comprising 2-100 amino acids.
20 . The method of claim 19 , wherein the peptide comprises cysteine.
21 . The method of claim 19 , wherein the peptide comprises a keratin protein fraction.
22 . The method of claim 11 , wherein the crosslinking agent comprises one or more substances selected from the group consisting of ketones, hydroxyketones, activated olefin-containing compounds, polycarboxylic acids, mono-epoxy compounds, poly-epoxy compounds, carbonates, imidoesters, carbodiimides, hexamethylene diisocyanate, N-hydroxysuccinimide esters, haloacetyls, pyridyl disulfide, hydrazides, aryl azides, and combinations thereof.
23 . The method of claim 11 , wherein heating the quantity of hair to a temperature between about 100° C. and about 235° C. while the composition is applied to the hair straightens the hair.
24 . The method of claim 11 , wherein the composition is substantially free of formaldehyde, monofunctional aldehydes, dialdehydes, polyfunctional aldehydes, ketoaldehydes or chemicals that release formaldehyde upon heating.