New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.
ASCORBIC ACID DERIVATIVE OR SALT THEREOF, PRODUCTION METHOD THEREOF, AND COSMETIC
申请人:Yoshioka Masato
公开号:US20110059034A1
公开(公告)日:2011-03-10
Disclosed is an ascorbic acid derivative or a salt thereof wherein at least one of hydrogen atoms in hydroxy groups at the 2-position and the 3-position of ascorbic acid is substituted by R—O—CH
2
—CH(OH)—CH
2
—, R—O—CH
2
—CH(CH
2
OH)—, R—CH(CH
2
OH)—, R—CH(OH)—CH
2
— (wherein R represents an alkyl group, an alkenyl group or a phenyl group), or a hydroxycyclohexyl group. Also disclosed is a method for producing an ascorbic acid derivative or a salt thereof, which is characterized by reacting ascorbic acid with an epoxy compound such as an alkyl glycidyl ether, an epoxy alkane or an alicyclic epoxy.
Stable liquid, allophanate-modified diphenylmethane diisocyanate trimers, prepolymers thereof, and processes for their preparation
申请人:Slack E. William
公开号:US20050101754A1
公开(公告)日:2005-05-12
The present invention relates to stable liquid, allophanate-modified, partially trimerized diphenylmethane diisocyanates, the prepolymers of these stable liquid, allophanate-modified, partially trimerized MDI's, and to processes for the preparation of these compositions. These allophanate modified partially trimerized diphenylmethane diisocyanates comprise the reaction product of a diphenylmethane diisocyanate and an organic compound in the presence of a catalytic amount of one or more trimer catalysts, one or more allophanate catalysts, one or more allophanate-trimer catalysts and mixtures thereof. The prepolymers are the reaction product of the stable liquid, allophanate-modified, partially trimerized MDI's with a suitable isocyanate-reactive group containing compound.
Use of Polyvinyl Lactam-Polyalkylene Block Copolymers as Solubilisers for Poorly Water-Soluble Compounds
申请人:Lange Ronald Frans Maria
公开号:US20080300320A1
公开(公告)日:2008-12-04
Use of polyvinyllactam-polyalkylene oxide block copolymers as solubilizers for sub-stances which are sparingly soluble in water.
Copolymers Based on Polyalkylene Oxide-Modified N-Vinyl Lactam Copolymers
申请人:Bouillo Nathalie
公开号:US20090036550A1
公开(公告)日:2009-02-05
Vinyllactam copolymers modified with polyalkylene oxide side-chains, and use thereof as solubilizers for substances which are sparingly soluble in water, and preparations comprising such copolymers.