A PROCESS OF CONTROLLED RADICAL GRAFTING OF A POLYOLEFIN
申请人:UNIVERSITA' DI PISA
公开号:EP1641838B1
公开(公告)日:2008-06-11
[EN] COLOURING MIXTURE FOR NEUTRAL PRODUCTS TO BE CROSSLINKED AND EXPANDED BY INJECTION MOLDING<br/>[FR] MELANGE COLORANT POUR PRODUITS NEUTRES A RETICULER ET A FAIRE MOUSSER DES PAR MOULAGE PAR INJECTION
申请人:API APPLIC PLASTICHE IND SPA
公开号:WO2003033571A1
公开(公告)日:2003-04-24
A colouring mixture for neutral products to be crosslinked and expanded by injection moldings disclosed, comprising a carrier consisting of a basic polymer and a pigment comprising crosslinking agents.
A Facile Method for the Oxidation of Aldehydes to Carboxylic Acids via Acetal-type Diperoxides
In the presence of a catalytic amount of trityl perchlorate, aldehydes smoothly react with t-butyl trimethylsilyl peroxide to give the acetal-type diperoxides in good yields. Treatment of these diperoxides with piperidine at 90 °C or the aqueous solution of CUSO4 and L-ascorbic acid at room temperature gave the corresponding carboxylic acids in good yields.
在一定量的高氯酸三甲苯酯催化下,醛与过氧化三甲基硅基叔丁酯顺利发生反应,生成缩醛型二过氧化物,收率很高。在 90 °C 下用哌啶或在室温下用 CUSO4 和 L-抗坏血酸的水溶液处理这些二过氧化物,可以得到相应的羧酸,收率很高。