5 results about "Methylene-lactone" patented technology

Provided is a method for producing a methylene lactone compound, whereby it is possible to efficiently produce a methylene lactone compound. The present invention relates to a method for producing a methylene lactone compound, which is characterized by comprising a step for reacting a specific gamma-butyrolactone compound with a specific aldehyde compound in the presence of an oxide or hydroxide of a metal comprising a group 2 element of the periodic table.

The present invention relates to anaerobically curable compositions made from renewable materials. In particular, an alpha-methylene-lactone is used with a (meth)acrylate component and a cure system to form an anaerobically curable composition.

The invention relates to a process for production and / or storage of α-methylenelactones, wherein a α- methylenelactone is present in a vessel, the α-methylenelactone is a α-methylenelactone of the following Formula I: and R1 is hydrogen, or a C1 to C10, in particular C1 to C5, linear or branched alkyl group, in particular R1 is hydrogen or a methyl group, and the vessel contains a gaseous phase and a liquid phase, wherein the gaseous phase comprises less than 15 vol.-%, based on the total gaseous phase, of oxygen, and the liquid phase comprises - 50.0000 wt.-% to 99.9995 wt.-%, based on the total liquid phase, of the α-methylenelactone, - 0.0000 wt.-% to 49.9995 wt.-%, based on the total liquid phase, of residuals, in particular carboxylic acids such as itaconic acid, hydroxycarboxylic acids such as 2-methylene-4-ol-butyric acid, hydroxycarboxylic esters such as γ-butyrolactone, water, further monomers, and / or organic solvents, and - 0.0005 wt.-% to 0.2000 wt.-%, based on the total liquid phase, of a polymerization inhibitor, wherein the polymerization inhibitor is an aminoxyl radical of the following Formular II: and R2 is hydrogen, oxygen, OH NH2, OMe or an alkyl-, ester- or amide group, wherein the polymerization inhibitor is in particular 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl.

This disclosure provides a method for manufacturing a powder containing a copolymer comprising structural units derived from α-methylene lactone and structural units derived from alkyl (meth)acrylate, characterized in that the manufacturing method comprises: a polymerization step in which monomers comprising α-methylene lactone and alkyl (meth)acrylate are suspended and polymerized in a solvent in the presence of a polymerization initiator and an emulsifier to obtain a copolymer; a drying step in which the copolymer is dried to obtain a first powder; and a heat treatment step in which the first powder is heated at a temperature higher than that of the drying step to obtain a second powder in which the total content of α-methylene lactone and alkyl (meth)acrylate is less than that of the first powder.

To provide a containing a polymer having a structural unit derived from α - methylene lactone, which can achieve both antiblocking properties and transparency, an optical film and a method for producing the same, and a film roll using the optical film.SOLUTION: A comprising: a polymer having a structural unit derived from α - methylene lactone; and silica particles having a mean particle size of 5 to 100nm.SELECTED DRAWING: None