Process for conditioning hair

Details Process for conditioning hair Process for conditioning hair

2001-07-27

2002-10-08

Dees, Jose′ G. (Department: 1616)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

C424S401000, C424S070110, C514S880000, C560S089000, C560S198000

Reexamination Certificate

active

06461598

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a process for conditioning and cleaning hair which comprises contacting the hair with an effective conditioning amount of a series of novel salt complexes. These complexes provide outstanding conditioning effects to the hair and are very mild to the eye. The complexes are made by neutralizing a fatty ammonium compound that is cationic with an anionic compound, producing a salt complex. Optionally, the complex can be combined with dimethicone copolyol to produce extremely mild products suitable for use in baby shampoos. The compounds of the present invention are water soluble, non-irritating to the eye and skin and are well suited to personal care applications.
2. Arts and Practices
Fatty quaternary compounds commonly called quats, are tetrasubstituted ammonium compounds where each of the four groups on nitrogen are a group other than hydrogen. If any hydrogen groups are present, the compounds are not quaternary amines, but rather are primary or secondary amines.
The most commonly encountered substituents are alkyl and alkyl amido groups. There are several classes of quats. The most important are (a) alkyl tri methyl quats for example cetyltrimonium chloride, (b) alkylamidopropyl dimethyl quats like stearylamidalkonium chloride and (c) di alkyl, di methyl quats for example dicetyldimonium chloride and (d) alkyl, benzyl, Di methyl quats like stearalkonium chloride.
There are several undesirable attributes of fatty cationic products.
1. Fatty Quaternary compounds are incompatible with anionic surfactants since an insoluble complex frequently is formed when the two types of materials are combined.
2. Many fatty Quaternary Compounds are eye irritants. The material is minimally irritating to the eyes at concentrations of 2.5%, which limits the concentration which is useful if low irritation is a requirement.
3. Fatty quats are generally hydrophobic and when applied to substrate can cause a loss of absorbance of the substrate. It is not an uncommon situation for a traveler to a hotel to encounter a very soft towel that totally fails to absorb water. This is because the fatty quaternary gives softness but being hydrophobic also prevents re-wet. This situation also can be observed on hair, the conditioner becomes gunky on the hair and has a tendency to build up.
We have learned that many of these negative attributes can be unexpectantly mitigated by making fatty complexes with carboxy fatty alcohol alkoxylates. The preferred complex has to have a molecular weight of over 1000 molecular weight units to obtain the most effective irritation mitigation. The mitigation of irritation, the improved water solubility and the skin feel make the compounds of the present invention highly desirable in personal care applications, Thus the present invention relates to a process for conditioning and cleaning hair which comprises contacting the hair with an effective conditioning amount of said series of novel salt complexes. Optionally, the complex can be combined with dimethicone copolyol to produce extremely mild products suitable for use in baby shampoos. The effective conditioning concentration for the process of the present invention runs between 0.01 and 10.0% by weight of the shampoo. The preferred is 0.2 to 2.0% by weight.
THE INVENTION
OBJECT OF THE INVENTION
It is the object of the present invention to provide a process for conditioning hair which comprises contacting the hair with an effective conditioning amount of a series of novel complexes that are made by neutralizng a fatty ammonium compound which is cationic with an anionic compound, producing a salt complex.
SUMMARY OF THE INVENTION
In a broad sense, the present invention discloses a process for conditioning hair which comprises contacting the hair with an effective conditioning amount of a series of novel complexes that are made by neutralizing a fatty ammonium compound which is cationic with an anionic compound, producing a salt complex. The effective conditioning concentration for the process of the present invention runs between 0.01 and 10.0% by weight of the shampoo. The preferred is 0.2 to 2.0% by weight.
DETAILED DESCRIPTION OF THE INVENTION
The process of the present invention is performed using the compounds conforming to the following structure:
 R
1
—O—C(O)R
2
C(O)O
−
wherein;
R
1
is CH
3
—(CH
2
)
n
—O—(CH
2
CH
2
O)
a
—(CH
2
CH(CH
3
)O)
b
—(CH
2
CH
2
O)
c
—;
n is an integers ranging from 7 to 21;
a and c are integers independently ranging from 0 to 20, with the proviso that a+b be greater than 5;
b is an integer ranging from 0 to 20;
R
2
is selected from the group consisting of
—CH
2
—CH
2
—, —CH═CH—, and
R
3
is selected from the group consisting of
CH
3
(CH
2
)
e
—
and
R
5
—C(O)N(H)—(CH
2
)
3
—
R
5
is CH
3
(CH
2
)
f
—
e is an integer from 5 to 21;
f is an integer from 5 to 21;
R
4
is selected from the group consisting of
CH
3
(CH
2
)
g
g is an integer ranging from 0 to 21
and
Preferred Embodiments
The effective conditioning concentration for the process of the present invention runs between 0.01 and 10.0% by weight of the shampoo. The preferred is 0.2 to 2.0% by weight.
In a preferred embodiment Ris;
CH
3
—(CH
2
)
n
—O—(CH
2
CH
2
O)
a
—(CH
2
CH(CH
3
)O)
b
—(CH
2
CH
2
O)
c
—.
In a preferred embodiment R
2
is —CH
2
—CH
2
—.
In a preferred embodiment R
2
is —CH═CH—.
In a preferred embodiment R
2
is
In a preferred embodiment e is an integer ranging from 7 to 21.
In a preferred embodiment R
3
is R
5
C(O)N(H)—(CH
2
)
3
—
f is an integer ranging from 5 to 21.
In a preferred embodiment R
4
is methyl.
In a preferred embodiment R
4
is
In a preferred embodiment the molecular weight of the complex is greater than 1000.
In another preferred embodiment, the complex is blended with dimethicone copolyol to improve the conditioning effect and feel.


REFERENCES:
patent: 5300287 (1994-04-01), Park
patent: 6372934 (2002-04-01), O'Lenick et al.
patent: 130 509 (1979-10-01), None
patent: 0 580 435 (1994-01-01), None
patent: WO 96/36871 (1996-11-01), None

Affiliated with

Also associated with

Rating

Process for conditioning hair does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for conditioning hair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for conditioning hair will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2919350