Isocyanate composition, microcapsule and production method thereof, and recording material

1. An isocyanate composition comprising an adduct of a multifunctional isocyanate compound having two or more isocyanate groups in the molecule thereof with a polymer obtained by radically polymerizing in the presence of a chain transfer agent comprising active hydrogen at least a vinyl monomer comprising a polymerizable compound comprising a polyether represented by the following Formula (I):

A 1 -(L-O) n -B 1   Formula (I)

wherein A 1 represents a group having an ethylenically unsaturated double bond; L represents an alkylene group; B 1 represents an alkyl group or an aryl group; and n is an average polymerization degree of the polyether and represents a number of 8 to 300.

2. A microcapsule having a polyurethane and/or polyurea wall, wherein the capsule wall comprises, via a covalent bond, a polymer obtained by radically polymerizing in the presence of a chain transfer agent comprising active hydrogen at least a vinyl monomer comprising a polymerizable compound comprising a polyether represented by the following Formula (I):

A 1 -(L-O) n -B 1   Formula (I)

wherein A 1 represents a group having an ethylenically unsaturated double bond; L represents an alkylene group; B 1 represents an alkyl group or an aryl group; and n is an average polymerization degree of the polyether and represents a number of 8 to 300.

3. A microcapsule having a polyurethane and/or polyurea wall, made from at least one raw material that include the isocyanate composition of claim 1 .

4. The microcapsule of claim 2 , wherein the microcapsule encapsulates a diazonium salt compound or an electron-donating dye precursor.

5. The microcapsule of claim 3 , wherein the microcapsule encapsulates a diazonium salt compound or an electron-donating dye precursor.

6. A recording material comprising a recording layer comprising microcapsules of claim 2 .

7. A recording material comprising a recording layer comprising microcapsules of claim 3 .

8. A thermosensitive recording material comprising a substrate, and, on the substrate, a thermosensitive recording layer comprising: a coupler and microcapsules encapsulating a diazonium salt compound; or a developer and microcapsules encapsulating an electron-donating dye precursor; wherein the microcapsules include microcapsules of claim 4 .

9. A thermosensitive recording material comprising a substrate, and, on the substrate, a thermosensitive recording layer comprising: a coupler and microcapsules encapsulating a diazonium salt compound; and/or a developer and microcapsules encapsulating an electron-donating dye precursor; wherein the microcapsules include microcapsules of claim 5 .

10. A thermosensitive recording material comprising a substrate, and, on the substrate, cyan, magenta and yellow color-forming thermosensitive recording layers, wherein each of the thermosensitive recording layers comprises: a coupler and microcapsules encapsulating a diazonium salt compound; or a developer and microcapsules encapsulating an electron-donating dye precursor; and the microcapsules include microcapsules of claim 4 .

11. A thermosensitive recording material comprising a substrate, and, on the substrate, cyan, magenta and yellow color-forming thermosensitive recording layers, wherein each of the thermosensitive recording layers comprises: a coupler and microcapsules encapsulating a diazonium salt compound; or a developer and microcapsules encapsulating an electron-donating dye precursor; and the microcapsules include microcapsules of claim 5 .

12. A method of producing microcapsules having polyurethane and/or polyurea walls, comprising: causing the isocyanate composition of claim 1 to react with a compound having at least one active hydrogen atom.

13. The method of claim 12 , wherein the compound having at least one active hydrogen atom includes two or more active hydrogen atoms.