Showing papers on "Meth- published in 1981"

meth)acryloyloxyalkyl dihydrogenphosphate and its preparation

Abstract: NEW MATERIAL:A compound of formulaI(n is an interger 5W12; R is H or methyl). EXAMPLE: 5-(Meth)acryloyloxypentyl dihydrogenphosphate. USE: A dental adhesive, capable of exhibiting improved water-resistant adhesive force to a metal and the tooth, and widely usable as adhesive monomers in structural adhesives, coating materials for a metal, metallic surface treating agents, etc. PROCESS: An alkylene diol of formula II is esterified with (meth)acrylic acid to give a diol mono(meth)acrylate, which is then reacted with phosphorus oxychloride. The P-Cl bond in the resultant compound is then hydrolyzed to afford the compound of formulaI. COPYRIGHT: (C)1983,JPO&Japio

Preparation of acrylamide or methacrylamide by fermentation

Abstract: PURPOSE:To prepare (meth)acrylamide efficiently under relatively mild conditions, by treating (meth)acrylonitrile with a specific enzyme. CONSTITUTION:N-771 Strain (FERM-P 4445) belonging to the genus Corynebacterium, N-775 strain (FERM-P 4447) belonging to the genus Nocardia etc. is cultivated in an ordinary medium in pH6-9 at 25-30 deg.C for 1-5 days aerobically to give an enzyme capable of hydrating (meth)acrylonitrile. The enzyme is reacted with (meth)acrylonitrile in an aqueous solution or suspension in pH7-9 at 25- 30 deg.C for 0.5-10hr with slow stirring to give a reaction solution, from which the mold is removed by centrifugation to prepare a filtrate. Colored substances, impurities, etc. are removed from the filtrate, which is concentrated under reduced pressure to give (meth)acrylamide.