Conditioning/styling terpolymers

Details Conditioning/styling terpolymers Conditioning/styling terpolymers

1999-05-07

2001-03-27

Wu, David W. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S264000, C526S328500, C526S317100, C526S318400, C526S307200, C526S307600, C525S072000, C525S283000, C525S244000, C428S078000

Reexamination Certificate

active

06207778

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to polymers for use in hair and skin care compositions, and, more particularly, to conditioning and styling terpolymers having advantageous low tackiness and high humidity resistance.
2. Description of the Prior Art
Copolymers of VP and DMAPMA have been used extensively as active components of hair and skin compositions. While these copolymers are generally suitable polymers for such products as conditioners and shampoos, it is desired to provide new polymers having improved performance characteristics in these and other personal care products.
SUMMARY OF THE INVENTION
What is described herein is a terpolymer of vinylpyrrolidone (VP), dimethylaminopropyl methacrylamide (DMAPMA) and C
9
-C
24
alkyl dimethylaminopropyl methacrylic acid quaternized monomers (QDMAPMA), within a defined compositional range, for use in hair and skin care compositions, which are characterized by low tackiness and high humidity resistance.
DETAILED DESCRIPTION OF THE INVENTION
The terpolymers of the invention comprises the following X, Y, and Z monomers, having the formulas given below:
where:
X is a vinyl cyclic amide, e.g. vinyl pyrrolidone; n=3 to 6; R is H or C
1
-C
5
alkyl and wt % of X=40-95; preferably 60-90;
where:
Y is a derivative of acrylic acid; P is O or NR
2
; R
1
, R
2
, R
3
, R
4
are independently H or C
1
-C
5
alkyl; R
5
is C
2
-C
16
alkyl alkylene; and wt % of Y=0.1 to 55; preferably 5-30;
where:
Z is a quaternized derivative of an acrylic acid; P is O or NR
2
; R
1
, R
2
, R
3
, R
4
are independently H or C
1
-C
5
alkyl; R
5
is a C
2
-C
16
alkylene; and R
6
is C
9
-C
24
alkyl; M is a halide, tosylate or phosphate anion; and wt % of Z=0.25 to 50, preferably 1-30.
The terpolymers of the intention are hydrophobically-modified cationic polymers hating long alkyl-chains therein. A typical terpolymer thus has the following formulas:
Suitably, monomer Z is prepared by tosylating DMAPMA as follows:
In preferred embodiments of the invention,
X is vinyl pyrrolidone;
Y is dimethylaminopropyl methacrylamide, and
Z is a C
12
-C
18
alkyl quaternized derivative of an acrylic acid;
X is about 60-90 wt %, Y is about 5-30 wt % and Z is about 1-30 wt %; Z is C
12
alkyl quaternized monomer; the weight average molecular weight of the terpolymer is 200,000 to 2,000,000; preferably 400,000 to 800,000; it is water soluble or water dispersible; and forms a clear humidity resistant, hydrophobic film when cast upon a support surface; which is surface active and hydrolytically stable; and is a homogeneous terpolymer.
Cosmetic compositions of advantageous properties including about 0.1 to 10% by weight of the terpolymer can be prepared conveniently in this invention.
Preferably, the homogeneous terpolymers of the invention are made according to the method described by Kou-Chang Liu et al. in U.S. Pat. No. 5,626,836.


REFERENCES:
patent: 4956430 (1990-09-01), Tazi
patent: 5321110 (1994-06-01), Shih
patent: 5603919 (1997-02-01), Liu
patent: 5609865 (1997-03-01), Liu et al.
patent: 5626836 (1997-05-01), Liu et al.
patent: 5830438 (1998-11-01), Dupius
patent: 5997853 (1999-12-01), Bolich, Jr. et al.
patent: 5997855 (1999-12-01), Liu
patent: 5997886 (1999-12-01), Peffly et al.

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