US 5,296,218 A · Ampholyte terpolymers providing superior conditioning properties in shampoos and other hair care products

Abstract

Ampholyte terpolymer conditioning additives for hair care products are disclosed which improve wet and dry hair combability, especially detangling and reduced static flyaway, sheen, and fixative properties, especially curl retention. The ampholyte terpolymers may have a weight average molecular weight of from about 10 thousand to 10 million, and comprise (a) from at least 1 to as much as 95 weight percent of the nonionic monomer acrylamide (AM), (b) from at least 5 to as much as 80 weight percent of the cationic monomer dimethyldiallylammonium chloride (DMDAAC), and (c) from at least 1 to as much as 75 weight percent of the anionic monomer acrylic acid (AA). In a preferred embodiment, the amount of the cationic and anionic components is such that the overall % net charge of the ampholyte terpolymer is between -5.0 and +5.0. The ampholyte terpolymers are added to hair care product formulations in amounts ranging from 0.1-10% by weight. They are particularly compatible with anionic surfactant shampoos, providing clear formulations without the loss of conditioning properties described above.

Claims23

Dependent claims

A composition for treating hair in which a cosmetically acceptable medium is used which contains from 0.1-10% by weight of a water-soluble ampholyte terpolymer having a weight average molecular weight of from about 10 thousand to 10 million, comprising:

(a) from at least 1 to as much as 95 weight percent of the nonionic monomer acrylamide (AM) of the following formula:
##STR4## where R is H or CH.sub.3 ;
and R.sup.1 and R.sup.2 are independently H, C.sub.1-4 alkyl, CH.sub.2 OCH.sub.3, CH.sub.2 OCH.sub.2 CH(CH.sub.3).sub.2, (CH.sub.2 CH.sub.2 O--).sub.x --H, where x=1-50, or phenyl, or together are C.sub.3-6 cycloalkyl;
(b) from at least 5 to as much as 80 weight percent of the cationic monomer dimethyldiallylammonium chloride (DMDAAC) of the following formula:
##STR5## where R.sub.1 and R.sub.2 are independently H or C.sub.1-12 alkyl, and the moiety .sup.- Y is a suitable anion;
and
(c) from at least 1 to as much as 75 weight percent of the anionic monomer acrylic acid (AA) of the following formula:
##STR6## where R is H or CH.sub.3 ;
and R.sup.1 is X.sup.+, H, C.sub.1-4 alkyl, CH.sub.2 CH.sub.2 OH, (CH.sub.2 CH.sub.2 O--).sub.x -H, where x=1-50, or phenyl, and X.sup.+ is a suitable cation forming a salt of the carboxylic acid.

6 more elements

A method of treating hair which comprises applying to said hair a cosmetically acceptable medium containing from 0.1-10% by weight of a water-soluble ampholyte terpolymer having a weight average molecular weight of from about 10 thousand to 10 million, comprising:

(a) from at least 1 to as much as 95 weight percent of the nonionic monomer acrylamide (AM) of the following formula:
##STR7## where R is H or CH.sub.3 ;
and R.sup.1 and R.sup.2 are independently H, C.sub.1-4 alkyl, CH.sub.2 OCH.sub.3, CH.sub.2 OCH.sub.2 CH(CH.sub.3).sub.2, (CH.sub.2 CH.sub.2 O--).sub.x --H, where x=1-50, or phenyl, or together are C.sub.3-6 cycloalkyl;
(b) from at least 5 to as much as 80 weight percent of the cationic monomer dimethyldiallylammonium chloride (DMDAAC) of the following formula:
##STR8## where R.sub.1 and R.sub.2 are independently H or C.sub.1-12 alkyl, and the moiety .sup.- Y is a suitable anion;
and
(c) from at least 1 to as much as 75 weight percent of the anionic monomer acrylic acid (AA) of the following formula:
##STR9## where R is H or CH.sub.3 ;
and R.sup.1 is X.sup.+, H, C.sub.1-4 alkyl, CH.sub.2 CH.sub.2 OH, (CH.sub.2 CH.sub.2 O--).sub.x --H, where x=1-50, or phenyl, and X.sup.+ is a suitable cation forming a salt of the carboxylic acid.

6 more elements

A method of treating hair in conjunction with the shampooing thereof with an anionic surfactant-containing shampoo, so as to improve the conditioning thereof with respect to the properties of detangling, wet combability, wet feel, dry combability, dry feel, sheen, static flyaway control, and curl retention,

comprising applying to said hair a composition compatible with said anionic surfactant-containing shampoo such that a clear formulation thereof is provided without the loss of said conditioning properties, wherein said composition comprises a cosmetically acceptable medium containing from 0.1-10% by weight of a water-soluble ampholyte terpolymer having a weight average molecular weight of from about 10 thousand to 10 million, comprising:
(a) from at least 1 to as much as 95 weight percent of the nonionic monomer acrylamide (AM) of the following formula:
##STR10## where R is H or CH.sub.3 ;
and R.sup.1 and R.sup.2 are independently H, C.sub.1-4 alkyl, CH.sub.2 OCH.sub.3, CH.sub.2 OCH.sub.2 CH(CH.sub.3).sub.2, (CH.sub.2 CH.sub.2 O--).sub.x --H, where x=1-50, or phenyl, or together are C.sub.3-6 cycloalkyl;
(b) from at least 5 to as much as 80 weight percent of the cationic monomer dimethyldiallylammonium chloride (DMDAAC) of the following formula:
##STR11## where R.sub.1 and R.sub.2 are independently H or C.sub.1-12 alkyl, and the moiety .sup.- Y is a suitable anion;
and
(c) from at least 1 to as much as 75 weight percent of the anionic monomer acrylic acid (AA) of the following formula:
##STR12## where R is H or CH.sub.3 ;
and R.sup.1 is X.sup.+, H, C.sub.1-4 alkyl, CH.sub.2 CH.sub.2 OH, (CH.sub.2 CH.sub.2 O--).sub.x --H, where x=1-50, or phenyl, and X.sup.+ is a suitable cation forming a salt of the carboxylic acid.

7 more elements

Dependencies are inferred from the claim text.

Ampholyte terpolymers providing superior conditioning properties in shampoos and other hair care products

Life of this patent

Ampholyte terpolymers providing superior conditioning properties in shampoos and other hair care products

Life of this patent

Abstract

Claims23