Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polymers chosen from acrylate and polyurethane polymers, wherein at least one latex polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polymers chosen from acrylate and polyurethane polymers, wherein at least one latex polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

The present invention relates to a cosmetic composition comprising: one or more dicarbonyl derivatives corresponding to formula (I) below, and/or derivatives thereof and/or hydrates thereof and/or salts thereof:

##STR00001##

in which formula (I) R=H, COOH, linear or branched C.sub.1-C.sub.6 alkyl which is optionally substituted with an OH or COOH or Br radical; phenyl or benzyl optionally substituted with an OH or COOH radical; or alternatively an indolyl radical or

##STR00002## one or more silanes corresponding to formula (II) below and/or oligomers thereof:

R.sub.1Si(OR.sub.2).sub.z(R.sub.3).sub.x(OH).sub.y  (II)

in which formula (II): R.sub.1 is a linear or branched, saturated or unsaturated, cyclic or acyclic C.sub.1-C.sub.6 hydrocarbon-based chain substituted with a group chosen from the following groups: amine NH.sub.2 or NHR (R=C.sub.1-C.sub.20 and especially C.sub.1-C.sub.6 alkyl optionally substituted with a radical comprising a silicon atom, C.sub.3-C.sub.40 cycloalkyl or C.sub.6-C.sub.30 aromatic), or with a hydroxyl group, a thiol group, an aryl or aryloxy group which is unsubstituted or substituted, in particular with an amino group or with a C.sub.1-C.sub.4 aminoalkyl group;  R.sub.1 possibly being interrupted with a heteroatom (O, S or NH) or a carbonyl group (CO), R.sub.2 and R.sub.3, which may be identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms, y denotes an integer ranging from 0 to 3, and z denotes an integer ranging from 0 to 3, and x denotes an integer ranging from 0 to 2,
with z+x+y=3.

The invention also relates to a process for straightening keratin fibers, especially the hair, using the compounds of formulae (I) and (II) with a straightening step using a straightening iron at a temperature of at least 150° C., preferably ranging from 150 to 250° C.

The present invention relates to a cosmetic composition comprising: one or more dicarbonyl derivatives corresponding to formula (I) below, and/or derivatives thereof and/or hydrates thereof and/or salts thereof:

##STR00001##

in which formula (I) R=H, COOH, linear or branched C.sub.1-C.sub.6 alkyl which is optionally substituted with an OH or COOH or Br radical; phenyl or benzyl optionally substituted with an OH or COOH radical; or alternatively an indolyl radical or

##STR00002## one or more silanes corresponding to formula (II) below and/or oligomers thereof:

R.sub.1Si(OR.sub.2).sub.z(R.sub.3).sub.x(OH).sub.y  (II)

in which formula (II): R.sub.1 is a linear or branched, saturated or unsaturated, cyclic or acyclic C.sub.1-C.sub.6 hydrocarbon-based chain substituted with a group chosen from the following groups: amine NH.sub.2 or NHR (R=C.sub.1-C.sub.20 and especially C.sub.1-C.sub.6 alkyl optionally substituted with a radical comprising a silicon atom, C.sub.3-C.sub.40 cycloalkyl or C.sub.6-C.sub.30 aromatic), or with a hydroxyl group, a thiol group, an aryl or aryloxy group which is unsubstituted or substituted, in particular with an amino group or with a C.sub.1-C.sub.4 aminoalkyl group;  R.sub.1 possibly being interrupted with a heteroatom (O, S or NH) or a carbonyl group (CO), R.sub.2 and R.sub.3, which may be identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms, y denotes an integer ranging from 0 to 3, and z denotes an integer ranging from 0 to 3, and x denotes an integer ranging from 0 to 2,
with z+x+y=3.

The invention also relates to a process for straightening keratin fibers, especially the hair, using the compounds of formulae (I) and (II) with a straightening step using a straightening iron at a temperature of at least 150° C., preferably ranging from 150 to 250° C.