METHOD OF PRODUCING SOLID BODY HAVING DEPRESSED PORTION ON SURFACE

• US 20080182024A1
• Filed: 06/28/2007
• Published: 07/31/2008
• Est. Priority Date: 01/26/2007
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ochi, Atsushi, Ogaki, Harunobu
• Granted Patent: US 7,931,848 B2
• Time in Patent Office: Days
• US Class Current: 427/331
• CPC Class Codes: C09D 167/03 the dicarboxylic acids and dihydroxy compounds having the carboxyl - and the hydroxy groups directly linked to aromatic rings
• CPC Class Codes: C09D 169/00 Coating compositions based on polycarbonates; Coating compositions based on derivatives of polycarbonates
• CPC Class Codes: C09D 5/28 for wrinkle, crackle, orange-peel, or similar decorative effects

Abstract

A method of very inexpensively and stably producing a solid body having a depressed portion on a surface, which is expected to be applied in a variety of industrial fields. This method forms a solid body having a depressed portion on a surface by using a solution at least containing a solvent A, a solvent B and a polymer compound soluble in solvent B, solvent A being a hydrophilic solvent and solvent B being a hydrophobic solvent, the boiling point of solvent A being equal to or higher than the boiling point of solvent B, and the total mass of solvent B being 50% or more of the total mass of the solvents contained in the solution, then solidifying the solution while forming a depressed portion from condensation on the surface of the solution during a process wherein either one or both of the solvent A and solvent B contained in the solution are evaporating.

Claims

1. A method of producing a solid body having a depressed portion on a surface, characterized by:

using a solution at least comprising a solvent A, a solvent B and a polymer compound soluble in solvent B, solvent A being a hydrophilic solvent and solvent B being a hydrophobic solvent, the boiling point of solvent A being equal to or higher than the boiling point of solvent B, and the total mass of solvent B being 50% or more of the total mass of the solvents contained in the solution; and

solidifying the solution while forming a depressed portion from condensation on the surface of the solution during a process wherein either one or both of the solvent A and solvent B contained in the solution are evaporating.

2. The method of producing a solid body according to claim 1, characterized in that solvent A and solvent B are compatible.

3. The method of producing a solid body according to claim 1, characterized in that a dipole moment as calculated from geometry optimization based on a semiempirical molecular-orbital calculation of solvent A is 2.0 or more.

4. The method of producing a solid body according to claim 1, characterized in that a dipole moment as calculated from geometry optimization based on a semiempirical molecular-orbital calculation of solvent A is 3.0 or more.

5. The method of producing a solid body according to claim 1, characterized in that a dipole moment as calculated from geometry optimization based on a semiempirical molecular-orbital calculation of solvent A is 4.0 or more.

6. The method of producing a solid body according to claim 1, characterized in that a dipole moment as calculated from geometry optimization based on a semiempirical molecular-orbital calculation of solvent B is 1.0 or less.

7. The method of producing a solid body according to claim 1, characterized in that solvent B is an aromatic organic solvent.

8. The method of producing a solid body according to claim 1, characterized in that the polymer compound soluble in solvent B is polycarbonate resin and/or aromatic polyester resin.

9. The method of producing a solid body according to claim 7, characterized in that the aromatic organic solvent is at least one or more solvents selected from the group consisting of toluene, 1,2-dimethylbenzene, 1,3-dimethylbenzene, 1,4-dimethylbenzene, 1,3,5-trimethylbenzene and monochlorobenzene.

10. The method of producing a solid body according to claim 1, characterized in that solvent A is at least one or more solvents selected from the group consisting of dimethyl sulfoxide, sulfolane, ethylene carbonate, propylene carbonate, dimethyl formamide, diethyl formamide, dimethyl acetamide, 2-butoxyethanol, 2-pyrrolidone, N-methyl-2-pyrrolidone, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol and dipropylene glycol.