Cosmetic composition containing retinol and dioic acid
申请人:Unilever Patent Holdings B.V.
公开号:US05705144A1
公开(公告)日:1998-01-06
A composition for topical application to human skin in order to promote the repair of photo-damaged skin and/or to reduce or prevent the damaging effects of ultra-violet light on skin and/or to lighten the skin comprising retinol or a derivative thereof and a dioic acid.
[EN] METHODS FOR PRODUCING DODECANEDIOIC ACID AND DERIVATIVES THEREOF<br/>[FR] PROCÉDÉS POUR PRODUIRE DE L'ACIDE DODÉCANEDIOÏQUE ET SES DÉRIVÉS
申请人:DRATHS CORP
公开号:WO2010085712A2
公开(公告)日:2010-07-29
Methods for producing biosourced dodecanedioic acid and compositions comprising biosourced dodecanedioic acid are provided. In some embodiments, the method comprises first forming muconic acid biologically from a renewable carbon source, reducing the muconic acid to hexenedioic acid, and then reacting the hexenedioic acid with an unsaturated fatty acid, typically a Δ9 unsaturated fatty acid, in a metathesis reaction to produce dodecenedioic acid. Dodecenedioic acid is then reduced to dodecanedioic acid. Dodecanedioic acid is can be used to form polymers, such as polyamides. Examples of polyamides include nylon, such as nylon 6,12. Nylon 6,12 can be formed by reacting dodecanedioic acid with 1,6-hexamethylene diamine.