US4054413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autoxidizable hair dye containing preparations
Assignee: P&G Hair Care Holding Inc
•
Filing: 1975-04-23
•
Granted: 1977-10-18
•
Expires: 1995-04-23
Abstract
Abstract An autoxidizable hair preparation capable of coloring hair when applied thereto and exposed to the atmosphere comprising N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof and a triol selected from the group consisting of 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene. The preparation is applied at multiple spaced intervals of time until the desired color build-up is attained. Also prepares the composition by preforming a solution of the triol by storing the corresponding triacetate in acid solution for a period of time then adding the N,N-bis(2-hydroxyethyl)-p-phenylenediamine.
Inventors
- 👤 Raymond Feinland
- 👤 Sigmund Iscowitz
- 👤 Milos S. Bil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:10
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/411; A61K8/33; A61K8/34; A61K8/347; A61Q; A61Q5/00; A61Q5/10; G; G11; G11C; G11C17/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
In a process for preparing a hair dye composition comprising a solution of a tinctorially effective amount of N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof and a tinctorially effective amount of a triol selected from the group consisting of 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene the improvement which comprises preforming a solution containing a tinctorially effective amount of the triol by storing a triacetate of said triol at a temperature between about room temperature and 50° C for about 12 to 24 hours with ethanol in dilute sulfuric acid and then incorporating in said preformed solution water and a composition containing a tinctorially effective amount of said N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof.
Claim 2
Dependent Claim
111 words
In a process for preparing a hair dye composition comprising a solution of a tinctorially effective amount of N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof and a tinctorially effective amount of a triol selected from the group consisting of 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene the improvement which comprises preforming a solution containing a tinctorially effective amount of the triol by storing a triacetate of said triol at a temperature between about room temperature and 50° C for about 12 to 24 hours with ethanol in dilute sulfuric acid and then incorporating in said preformed solution water and a composition containing a tinctorially effective amount of said N,N-bis(2-hydroxyethyl)-p-phenylenediamine or an acid addition salt thereof.
Claim 3
Dependent Claim
38 words
A process according to claim 1 including the step of adjusting with a suitable alkali the pH of the composition formed by mixing said preformed solution of said triol and said N,N-bis (2-hydroxyethyl)-p-phenylenediamine or acid addition salt thereof.
Claim 4
Dependent Claim
161 words
In a process for preparing a hair dye composition comprising a solution of a tinctorially effective amount of: a. a p-phenylenediamine of the formula ##STR3## or an acid addition salt thereof; where R is hydrogen, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, or 2,3-dihydroxypropyl and where R 1 and R 2 , which may be the same or different, are hydrogen or methyl; and b. a tinctorially effective amount of a triol selected from the group 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene; the improvement which comprises preforming a solution containing a tinctorially effective amount of the triol by storing the triacetate of said triol at a temperature between about room temperature and 50° C for about 12 to 72 hours with a lower aliphatic alcohol having from 1 to 3 carbon atoms and a concentrated inorganic mineral acid selected from the group consisting of sulfuric and hydrochloric, and then incorporating in said preformed solution water and a composition containing a tinctorially effective or an acid addition salt thereof.
Claim 5
Dependent Claim
161 words
In a process for preparing a hair dye composition comprising a solution of a tinctorially effective amount of: a. a p-phenylenediamine of the formula ##STR3## or an acid addition salt thereof; where R is hydrogen, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, or 2,3-dihydroxypropyl and where R 1 and R 2 , which may be the same or different, are hydrogen or methyl; and b. a tinctorially effective amount of a triol selected from the group 1,2,4-benzenetriol and 2,4,5-trihydroxytoluene; the improvement which comprises preforming a solution containing a tinctorially effective amount of the triol by storing the triacetate of said triol at a temperature between about room temperature and 50° C for about 12 to 72 hours with a lower aliphatic alcohol having from 1 to 3 carbon atoms and a concentrated inorganic mineral acid selected from the group consisting of sulfuric and hydrochloric, and then incorporating in said preformed solution water and a composition containing a tinctorially effective or an acid addition salt thereof.
Claim 6
Dependent Claim
27 words
A process according to claim 3 in which said p-phenylenediamine is selected from the group consisting of p-phenylenediamine; 2,5-diaminotoluene, N,N-bis(2-hydroxyethyl)-p-phenylenediamine; 2,6-dimethyl-p-phenylenediamine; and N 4 ,N 4 -bis(2-hydroxyethyl)-2-methyl-p-phenylenediamine.
Claim 7
Dependent Claim
36 words
A process according to claim 3 including the step of adjusting the pH of the composition formed by mixing said preformed solution of said triol with said p-phenylenediamine or acid addition salt with a suitable alkali.
Claim 8
Dependent Claim
35 words
A process according to claim 3 in which from about 1 to 60 parts of said triacetate and from 0.5 to 2.0 parts of said concentrated acid are employed per 100 parts of said alcohol.
References Cited (Backward Citations)
GB190012902A
Cited
US2162458A
Cited
US2733186A
Cited
US2975101A
Cited
US3167478A
Cited
US3337411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |