Methylene beta-ketoester monomers, methods for making methylene beta-ketoester monomers, polymerizable compositions and products formed therefrom
The present invention provides methylene beta-ketoester monomers, methods for producing the same, and compositions and products formed therefrom. In the method for producing the methylene beta-ketoesters of the invention, a beta-ketoester is reacted with a source of formaldehyde in a modified Knoevenagel reaction optionally in the presence of an acidic or basic catalyst, and optionally in the presence of an acidic or non-acidic solvent, to form reaction complex. The reaction complex may be an oligomeric complex. The reaction complex is subjected to further processing, which may be vaporization by contact with an energy transfer means in order to isolate the beta-ketoester monomer. The present invention further compositions and products formed from methylene beta-ketoester monomers of the invention, including monomer-based products (e.g., inks, adhesives, coatings, sealants or reactive molding) and polymer-based products (e.g., fibers, films, sheets, medical polymers, composite polymers and surfactants).
1. A methylene beta-ketoester monomer having the structural formula:
wherein R 1 and R 2 are independently C 1 -C 15 alkyl, C 2 -C 15 alkenyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl or heteroaryl-(C 1 -C 15 alkyl), or alkoxy-(C 1 -C 15 alkyl), each of which may be optionally substituted by C 1 -C 15 alkyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl, C 1 -C 15 alkoxy, C 1 -C 15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester;
or
wherein R 1 and R 2 are taken together with the atoms to which they are bound to form a 5-7 membered heterocyclic ring which may be optionally substituted by C 1 -C 15 alkyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl, C 1 -C 15 alkoxy, C 1 -C 15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester; and
wherein R 1 and/or R 2 is halo-(C 1 -C 15 alkyl), halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), heteroaryl or heteroaryl-(C 1 -C 15 alkyl);
wherein the monomer includes a nitro, an azido, or a cyano group.
2. The monomer of claim 1 , wherein the monomer includes a chlorine atom.
3. The monomer of claim 1 , wherein the monomer includes a bromine atom.
4. A polymerizable composition including:
i) at least one methylene beta-ketoester monomer according to claim 1 ; and
ii) at least one additive selected from the group consisting of an acidic stabilizer, a free radical stabilizer, a sequestering agent, a cure accelerator, a rheology modifier, a plasticizing agent, a thixotropic agent, a natural rubber, a synthetic rubber, a filler agent and a reinforcing agent.
5. The polymerizable composition according to claim 4 , wherein the polymerizable composition includes an acid stabilizer or a free radical stabilizer.
6. A methylene beta-ketoester monomer having the structural formula:
wherein R 1 and R 2 are independently C 1 -C 15 alkyl, C 2 -C 15 alkenyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl or heteroaryl-(C 1 -C 15 alkyl), or alkoxy-(C 1 -C 15 alkyl), each of which may be optionally substituted by C 1 -C 15 alkyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl, C 1 -C 15 alkoxy, C 1 -C 15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester;
or
wherein R 1 and R 2 are taken together with the atoms to which they are bound to form a 5-7 membered heterocyclic ring which may be optionally substituted by C 1 -C 15 alkyl, halo-(C 1 -C 15 alkyl), C 3 -C 6 cycloalkyl, halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), aryl, aryl-(C 1 -C 15 alkyl), heteroaryl, C 1 -C 15 alkoxy, C 1 -C 15 alkylthio, hydroxyl, nitro, azido, cyano, acyloxy, carboxy, or ester; and
wherein R 1 and/or R 2 is halo-(C 1 -C 15 alkyl), halo-(C 3 -C 6 cycloalkyl), heterocyclyl, heterocyclyl-(C 1 -C 15 alkyl), heteroaryl or heteroaryl-(C 1 -C 15 alkyl);
wherein the monomer includes a sulfur atom.
7. A polymerizable composition including:
i) at least one methylene beta-ketoester monomer according to claim 6 ; and
ii) at least one additive selected from the group consisting of an acidic stabilizer, a free radical stabilizer, a sequestering agent, a cure accelerator, a rheology modifier, a plasticizing agent, a thixotropic agent, a natural rubber, a synthetic rubber, a filler agent and a reinforcing agent.