Abstract: The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.

Abstract: The present invention relates to a process for preparing butanediol dimethacrylates, which comprises the transesterification of butanediol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising at least one lithium compound and at least one calcium compound is used as catalyst, at least one of the compounds of lithium and/or of calcium is an oxide, a hydroxide, an alkoxide having from 1 to 4 carbon atoms or a carboxylate having from 1 to 4 carbon atoms and at least part of the reaction is carried out in the presence of an effective amount of water. The process of the invention makes a particularly inexpensive preparation of butanediol dimethacrylates having a very high purity possible.

Abstract: The present invention relates to a (meth)acrylate monomer of the general formula (I) in which R1 is hydrogen or a methyl group, X is oxygen or a group of the formula NR? in which R? is hydrogen or a radical having 1 to 6 carbon atoms, and R2 is a radical having 3 to 31 carbon atoms and at least one aldehyde group. The present invention further relates to a process for preparing the monomers set out above, to polymers obtainable from this monomer mixture, and to coating materials which comprise the stated polymers.

Abstract: The present invention relates to a (meth)acrylate monomer of the general formula (I) in which R1 is hydrogen or a methyl group, X is oxygen or a group of the formula NR? in which R? is hydrogen or a radical having 1 to 6 carbon atoms, R2 is an alkylene group having 1 to 22 carbon atoms, Y is oxygen, sulphur or a group of the formula NR?, in which R? represents hydrogen or a radical having 1 to 6 carbon atoms, and R3 is an unsaturated radical having 8 carbon atoms and at least two double bonds. The present invention further relates to a process for preparing the monomers set out above, to polymers obtainable from this monomer mixture, and to coating materials which comprise the stated polymers.

Abstract: The present invention relates to a process for preparing polyalkylene glycol di(meth)acrylates by reacting polyalkylene glycol with (meth)acrylic anhydride, wherein the reaction mixture contains at most 0.5% by weight of metal compounds and/or amines, the reaction is carried out in the presence of polymerization inhibitors and the reaction temperature is at least 60° C.

Abstract: The present invention relates to an aqueous dispersion comprising at least one alkyd resin and at least one polymer comprising repeating units derived from monomers A of formula (I) in which R is hydrogen or a methyl group, X1 and X2 independently are oxygen or a group of the formula NR?, in which R? is hydrogen or a radical having 1 to 6 carbon atoms, with the proviso that at least one of the groups X1 and X2 is a group of the formula NR? in which R? is hydrogen or a radical having 1 to 6 carbon atoms, and Z is a linking group, and R1 is an unsaturated radical having 9 to 25 carbon atoms.

Abstract: The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.

Abstract: The present invention relates to a process for preparing butanediol dimethacrylates, which comprises the transesterification of butanediol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising at least one lithium compound and at least one calcium compound is used as catalyst, at least one of the compounds of lithium and/or of calcium is an oxide, a hydroxide, an alkoxide having from 1 to 4 carbon atoms or a carboxylate having from 1 to 4 carbon atoms and at least part of the reaction is carried out in the presence of an effective amount of water. The process of the invention makes a particularly inexpensive preparation of butanediol dimethacrylates having a very high purity possible.

Abstract: The present invention relates to a process for preparing allyl methacrylate, comprising the reaction of allyl alcohol with an ester of methacrylic acid, wherein the reaction is catalysed by zirconium acetylacetonate. The process according to the invention enables particularly favourable preparation of allyl methacrylate with a very high purity.