Patent Picks—Reducing Friction, Gentle Cleansing and Improving Dry Conditioning in Hair
By: Rachel L. Grabenhofer
Posted: January 4, 2012
Chosen biweekly for their relevance to personal care, Patent Picks are taken from publicly available sources. This edition features technologies related to hair care formulating.
Personal care composition additive for application on keratin substrates to provide long lasting benefits
WIPO Patent Application WO/2011/163589
Publication date: Dec. 29, 2011
Assignee: Hercules Inc., P. Erazo-Majewicz, G. Kroon, THL Le-Pham and T. Nuutinen
This patent discloses a personal care composition additive to provide long lasting benefits to keratin substrates such as conditioning in systems including two-in-one shampoos and leave-on and rinse off conditioners for hair and skin, or for imparting greater water resistance to compositions including sunscreens or cosmetics. The described additive is composed of a substantive polymer and a water miscible, polar solvent at a concentration of polymer to solvent in the range of about 0.1% to about 20.0%. The substantive polymer has a molecular weight in the range of greater than approximately 50 kDalton to less than or equal to about 800 kDalton. The substantive polymer also has a cationic degree of substitution (Cat- DS) of greater than about 0.001 units, and is selected from polysaccharides and synthetic polymer-containing cationic monomers.
Polymerizable carbamate and thiocarbamate compounds, polymers derived from them, and compositions thereof
WIPO Patent Application WO/2011/163317
Publication date: Dec. 29, 2011
Assignee: ISP Investments Inc. and O.M. Musa
Carbamate and thiocarbamate compounds that comprise a polymerizable moiety and one or more free hydroxyl and/or thiol groups are described in this patent. These polymers may be obtained by polymerizing the carbamate and/or thiocarbamate compounds. The carbamate and thiocarbamate compounds, as well as the polymers they produce, may be formulated into adhesive, agricultural, biocide, cleaning, coating, encapsulation, membrane, oilfield, performance chemical and personal care compositions. Such personal care/cosmetic compositions may contain one or more protecting agents in combination with the described polymer to prevent or limit the degrading effects of natural physical and/or chemical assaults on keratinous materials.