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High Refractive Index Amphiphilic Phenyl Silicones for Applications in Personal Care

IP.com Disclosure Number: IPCOM000237714D
Publication Date: 2014-Jul-04

Publishing Venue

The IP.com Prior Art Database

Abstract

Cosmetic applications of linear or branched organopolysiloxanes containing bonded arylalkyl groups, long chain alkyl groups, Si-C bonded surfactant groups, preferably polyoxyalkylene polyether groups, which exhibit high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents, are described.

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High Refractive Index Amphiphilic Phenyl Silicones for Applications in Personal Care

Amitabha Mitraa, Janaina Alvesb, Gerhard Beerc, Tassilo Haberederc, Christina Ongd, Claudius Schwarzwaelderc

aWacker Chemical Corporation, 3301 Sutton Road, Adrian, MI 49221, U.S.A.

bWacker Química do Brasil Ltda., Rua Municipal, 325 (antigo nº 100) - Jd. Alvorada, 06612-060 Jandira - São Paulo, Brazil

cWacker Chemie AG, Johannes-Hess-Str. 24, 84489 Burghausen, Germany

dWacker Chemicals (South Asia) Pte. Ltd., 61 Science Park Road, #06-09/12, The Galen, Singapore Science Park II, Singapore 117525

ABSTRACT

Cosmetic applications of linear or branched organopolysiloxanes containing bonded arylalkyl groups, long chain alkyl groups, Si-C bonded surfactant groups, preferably polyoxyalkylene polyether groups, which exhibit high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents, are described.

INTRODUCTION AND BACKGROUND

The present invention pertains to the synthesis and cosmetic application of amphiphilic organopolysiloxanes having a high refractive index, which readily emulsify or self-emulsify in aqueous preparations to form micro- or macro-emulsions, are free of cyclic organopolysiloxanes, and bear arylalkyl, long chain alkyl, and hydrophilic groups along the polymer chain.

Polydimethylsilicones, optionally functionalized, have long been used in a variety of applications including cosmetics and personal care products such as shampoos and conditioners. Unfortunately, such silicones suffer from a relatively low refractive index. In the personal care

Formatiert: Deutsch (Deutschland)


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sector especially, there is an increasing emphasis on high gloss in hair care products. Such products also have uses in cleaning products such as waxes and polishes.

Personal care consumer products such as shampoos, conditioners, skin care formulations and color cosmetics articles often derive high or higher aesthetic and commercial value from the shine and/or gloss benefits that they impart. Ingredients with a refractive index (=RI) of greater than about 1.44 can lead to distinct/discernible shine/gloss perception on keratinous and skin surfaces. Aryl (=Ar) substituents in both small molecules and polymers are a preferred way to raise the RI of ingredients used for shine in personal care formulations. High-RI arylated silicones (both homo- and copolymers with dimethylsiloxane) containing either Ar-Si moieties or aryllkyl substitution on silicon are widely known in the literature and the personal care industry, although molecules with the Ar-Si unit are most commonly used in personal care, particularly, ingredients such as phenyl trimethicone (INCI nomenclature) sold in the market, e.g., as Dow Corning® 556 Fluid, or trimethylsiloxyphenyldimethicone as Wacker BELSIL® PDM 20 and BELSIL®PDM 1000, etc.

Arylalkylsilicones of high refractive index are known from U.S...