(Meth) acryloyl group-containing aromatic isocyanate compound and production process thereof
A monomer is provided which is excellent in reactivity, can give high heat resistance and high refractive index, and has two or more polymerizable functional groups with different polymerization properties and an aromatic ring in the molecule. An industrial advantageous process for producing the monomer is also provided. The monomer is an aromatic isocyanate compound containing a (meth)acryloyl group, and is represented by Formula (I): wherein R 1 is a single bond or a linear or branched alkylene group of 1 to 5 carbon atoms, R 2 is a hydrogen atom or a methyl group, R 3 is a single bond or a linear or branched alkylene group of 1 to 3 carbon atoms, X is independently a halogen atom or an electron-withdrawing group, m is an integer ranging from 0 to 4, n is an integer ranging from 1 to 3, and 1≦m+n≦5.
1. A process for producing an aromatic isocyanate compound containing a (meth)acryloyl group, the compound being represented by Formula (I):
wherein R 1 is a single bond or a linear or branched alkylene group of 1 to 5 carbon atoms, R 2 is a hydrogen atom or a methyl group, R 3 is a single bond, X is independently a halogen atom or an electron-withdrawing group, m is an integer ranging from 0 to 4, n is an integer ranging from 1 to 3, and 1≦m+n≦5,
the process comprising the following steps (1′) to (3′):
(1′) a step of reacting a hydroxyphenylamine compound and a mineral acid to obtain a hydroxyphenylamino mineral acid salt compound, the hydroxyphenylamine compound being represented by Formula (V):
wherein R 1 , R 3 , X, m and n are as defined in Formula (I),
the hydroxyphenylamino mineral acid salt compound being represented by Formula (VI):
wherein R 1 , R 3 , X, m and n are as defined in Formula (I), and W 1 is the mineral acid;
(2′) a step of reacting the hydroxyphenylamino mineral acid salt compound obtained in the step (1′) and a compound represented by Formula (VII) to obtain a hydroxyphenyl isocyanate compound:
wherein Z 1 and Z 2 are each a fluorine atom, a chlorine atom, a bromine atom, an imidazole, a pyrazole or R′O— wherein R′ is an alkyl or alkenyl group of 1 to 6 carbon atoms that is a straight chain or has a branch, or an aryl group that is unsubstituted or is substituted with a substituent group,
the hydroxyphenyl isocyanate compound being represented by Formula (VIII):
wherein R 1 , R 3 , X, m and n are as defined in Formula (I); and
(3′) a step of reacting the hydroxyphenyl isocyanate compound obtained in the step (2′) with a compound represented by Formula (XI):
wherein R 2 is as defined in Formula (I).
2. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 1 , wherein the mineral acid is at least one acid selected from the group consisting of sulfuric acid, nitric acid, hydrochloric acid, carbonic acid and phosphoric acid.
3. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 1 , wherein the reactions in the steps (1′) to (3′) are performed in solvents.
4. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 3 , wherein the solvent used in the step (1′) is at least one solvent selected from the group consisting of water, alcohols, esters, ethers, aromatic hydrocarbons, aliphatic hydrocarbons and halogenated hydrocarbons.
5. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 3 , wherein the solvent used in the steps (2′) and (3′) is at least one solvent selected from the group consisting of esters, ethers, aromatic hydrocarbons, aliphatic hydrocarbons and halogenated hydrocarbons.
6. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 4 , wherein the step (2′) is performed after the solvent used in the step (1′) is distilled away.
7. The process for producing an aromatic isocyanate compound containing a (meth)acryloyl group according to claim 1 , wherein a basic nitrogen compound is added as catalyst in the step (3′).