| 摘要 |
#CMT# #/CMT# A composition (C) for the treatment of keratinous fibres containing (a) compounds (X) and (Y), at least one of which is a silicon compound, which undergo hydrosilylation, condensation or peroxide-mediated crosslinking when brought together and (b) at least one alkoxysilane with only one silicon atom. #CMT# : #/CMT# Independent claims are also included for (1) a method for the treatment of keratinous fibres by the application of composition (C) (2) a multi-compartment device containing at least two compositions comprising components (a) and (b) and possibly organic solvent(s). #CMT#USE : #/CMT# These compositions (possibly containing organic solvent) are used for the treatment of keratinous fibres (claimed). Used especially for conditioning human hair. #CMT#ADVANTAGE : #/CMT# A new hair treatment composition which enables long-lasting fixation combined with retention of good cosmetic properties. #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Compositions: If (X) and (Y) react by hydrosilylation, (X) is a silicon compound, especially a polyorganosiloxane, with at least two unsaturated aliphatic groups. These polysiloxanes (X) contain siloxane units of formula (I) and (II). R mR'(SiO) (3-m)/2(I) R n(SiO) (4-n)/2(II) R : 1-30C hydrocarbyl; m : 1 or 2; R 91>2-10C unsaturated aliphatic hydrocarbyl or 5-8C unsaturated cyclic hydrocarbyl; n : 1, 2 or 3. In this case, preferred (X) comprises organic or hybrid organic/silicone oligomers or polymers with at least 2 unsaturated aliphatic groups (various polymer types listed, e.g. acrylic polymers or polyurethanes), and (Y) comprises organo-hydrogen-siloxanes with at least two Si-H groups, especially compounds with units of formula (III). R pH(SiO) (3-p)/2(III) p= 1 or 2. The terminal groups of formula (III) are CH 3SiO 1/2. The catalyst is a platinum- or tin-based catalyst, present in amounts of 0.0001-20 wt.%. If (X) and (Y) react by condensation, these compounds contain at least two lateral and/or terminal alkoxysilane and/or silanol groups; preferred compounds are polyorganosiloxanes with at least two alkoxysilane groups, based on units of formula (IV) and (V), with at least two terminal groups of formula (VI). R 9>s(SiO) (4-s)/2(IV) (R 9>sSiO 2) r(V) ZSiR 1>x(OR) 3-x(VI) R 9>1-6C alkyl, phenyl or fluoroalkyl; s : 0, 1, 2 or 3; f : 2-5000 (such that the polymer shows a viscosity of 0.5-3000 Pa.s at 25[deg] C); R (in VI) : methyl, ethyl, n- or iso-propyl, n-, sec.- or iso-butyl; R 1>methyl or ethyl; x : 0 or 1, preferably 0; Z : 2-18C saturated hydrocarbylene, or siloxane segments of formula -G-[Si(R 9>) 2O] c-Si(R 9>) 2-G-; G : 2-18C saturated hydrocarbylene; c : 1-6 Preferred condensable polysiloxanes are compounds of formula (VII), and titanium-based catalysts are used in amounts of 0.0001-20 wt.%. Alternatively, (X) and (Y) may react by crosslinking in presence of peroxide. Generally, the weight-average molecular weights of (X) and (Y) are in the range from 200 to 1 million. Component (b) comprises alkoxysilanes of formula R 4-nSiX nin which X : alkoxy; R : a 1-12C monovalent organic radical (optionally containing groups such as mercapto, epoxy, (meth)acrylyl, fluoro, aryl, amino or urea); n : 1-4 , especially 3-aminopropyl-triethoxy-silane or 3-mercaptopropyl-triethoxy-silane. Other possible components include fillers, organic solvents and/or silicone solvents. #CMT#[Image]#/CMT# #CMT#DEFINITIONS : #/CMT# Preferred Definitions: R : methyl; R 9>1>vinyl or -R 9>2>-CH=CHR 9>3>; R 9>2>1-8C hydrocarbylene (attached to silicon); R 9>3>H or 1-4C alkyl . #CMT#EXAMPLE : #/CMT# A hair treatment formulation comprising (C1) a mixture of 50% mixture (A~), 40% cyclopentadimethlysiloxane (D5), 0.5% DC Z 6011(RTM: aminopropyl-triethoxy-silane) and 9.5% water, and (C2) a mixture of 50% mixture (B~) and 50% (D5). Mixture (A~) comprised 25-45 wt.% bis-trimethoxysiloxyethyl-tetramethyldisiloxyethyl-dimethicone (polymer), 5-20 wt.% silylated silica (filler) and 30-70 wt.% disiloxane (solvent); mixture (B~) comprised 80-99 wt.% disiloxane solvent and 1-20 wt.% tetra-tert.-butyltitanate (catalyst). (C1) and (C2) were mixed in a wt. ratio of 10:1, applied to short, dry hair and dried for 30 minutes in the open air followed by 30 minutes under a hair dryer. The hair-dressing effects obtained were resistant to several shampooings. The product was removed by treatment with D5, leaving hair with a particularly soft, cosmetic feel. |
