摘要:
The present invention relates to a (meth)acrylate polymer for preparing a coating composition, where the (meth)acrylate polymer comprises 0.5% to 20% by weight of units derived from (meth)acrylic monomers which in the alkyl radical have at least one double bond and 8 to 40 carbon atoms, 0.1% to 60% by weight of units derived from hydroxyl-containing monomers which have up to 9 carbon atoms, 0.1% to 95% by weight of units derived from (meth)acrylates having 1 to 12 carbon atoms in the alkyl radical, and 0.1% to 60% by weight of units derived from styrene monomers, based in each case on the weight of the (meth)acrylate polymer, and the (meth)acrylate polymer has a weight-average molecular weight in the range from 2000 to 60 000 g/mol. The present invention further relates to a coating composition and to a method of producing a coating. The present invention describes, furthermore, a coated article comprising a coating obtainable by the method.
摘要:
The invention relates to a process for continuously preparing N-alkyl(meth)acrylamides by reacting alkyl (meth)acrylates with high-boiling amines. A catalyst activation and specific workup technique achieve product qualities which have not been achieved to date. In addition, very high space-time yields and overall yields can be achieved.
摘要:
The invention relates to mixtures for producing transparent plastic, which mixtures comprise: a) compounds of formulae (I) and (II), wherein R1 independently represents hydrogen or a methyl group, R2 independently represents a linear or branched, aliphatic or cycloaliphatic group or a substituted or unsubstituted aromatic or heteroaromatic group and m and n independently represent an integer ≧0, with m+n>0, b) a prepolymer produced from polymethacrylate and alkyldithiols or polythiols, preferably HS—R3—SH (III), wherein R3 is the same or different from R2 and may have the definition of R2, and c) aromatic vinyl compounds.
摘要:
The present invention relates to mixtures for preparing transparent plastics, encompassing a) a prepolymer prepared from compounds of the formula (I) and (II) where each R1, independently of the others, is hydrogen or a methyl radical, each R2, independently of the others, is a linear or branched, aliphatic or cycloaliphatic radical, or a substituted or unsubstituted aromatic or heteroaromatic radical, and each of m and n, independently of the other, is a whole number greater than or equal to 0, where m+n>0, and from compounds of the formula (III), or from alkyl dithiols or from polythiols, preferably HS—R3—SH (III) where R3, identical with or different from R2, can be as defined for R2, and b) at least one monomer (A) capable of free-radical polymerization and having at least 2 methacrylate groups, and c) aromatic vinyl compounds, such as styrene, and d) if appropriate, a monomer capable of free-radical polymerization and having at least two terminal olefinic groups whose reactivity differs, and/or e) if appropriate, at least one monomer (B) from the group of the methacrylates, preferably 2-hydroxyethyl methacrylate.
摘要:
The invention relates to a method for producing glycerol carbonate methacrylate in the presence of metal-chelate catalysts of the metal ion-1,3-diketonate type.
摘要:
The present invention relates to mixtures for preparing transparent plastics, encompassing a) compounds of the formula (I) and (II) where each R1, independently of the others, is hydrogen or a methyl radical, each R2, independently of the others, is a linear or branched, aliphatic or cycloaliphatic radical, or a substituted or unsubstituted aromatic or heteroaromatic radical, and each of m and n, independently of the other, is a whole number greater than or equal to 0, where m+n>0, and b) at least one monomer (A) capable of free-radical polymerization with a molar mass of at least 150 g/mol, which contains at least two terminal olefinic groups, where at least two of the olefinic groups of the monomer (A) have, in the α- and/or β-position with respect to the olefinic group, atoms which differ in nature and/or number, in the radical which connects the at least two olefinic groups.
摘要:
A method for producing a swellable polymer by polymerizing a composition containing at least one polyalkylene glycol di(meth)acrylate having a weight-average molecular weight from 2500 g/mol to 10000 g/mol, wherein the polymer contains at least 50.0% by weight based on the total weight of the polymer of said at least one polyalkylene glycol di(meth)acrylate.
摘要:
The present invention relates to a composition which comprises at least one hydroxyalkyl(meth)acrylate and has been stabilized for a purification, which comprises hydroquinone monomethyl ether and 4-hydroxy-2,2,6,6-tetramethylpiperidine N-oxyl. The present invention additionally describes processes for purifying and for preparing hydroxyalkyl(meth)acrylates. A further aspect of the present invention is a composition which is obtainable by the processes mentioned.
摘要:
Use of a swellable polymer for sealing, wherein the polymer is obtainable by polymerizing a composition which comprises at least one polyalkylene glycol di(meth)acrylate having a weight-average molecular weight greater than 2500 g/mol.