Thermally decomposable binder

• US 10,759,901 B2
• Filed: 09/02/2015
• Issued: 09/01/2020
• Est. Priority Date: 03/02/2015
• Status: Active Grant

• Current Assignee: Sumitomo Seika Chemicals Company Limited (Sumitomo Chemical Company Limited), Tokyo University of Agriculture and Technology
• Original Assignee: Tokyo University of Agriculture and Technology
• Inventors: Nakano, Koji, Nishioka, Kiyoshi, Suzuki, Masahiro, Fujimoto, Nobutaka
• Primary Examiner(s): Niland, Patrick D
• Application Number:
  US15/552,395
• Publication Number:
  US 20180030203A1
• Time in Patent Office: 1,826 Days
• CPC Class Codes: C08G 64/02 Aliphatic polycarbonates
• CPC Class Codes: C08G 64/0208 saturated
• CPC Class Codes: C08G 64/34 and cyclic ethers
• CPC Class Codes: C08G 64/42 Chemical after-treatment
• CPC Class Codes: C08K 2003/0806 Silver
• CPC Class Codes: C08K 3/00 Use of inorganic substances as compounding ingredients
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates

Abstract

A thermally decomposable binder containing an aliphatic polycarbonate resin containing a constituting unit represented by the formula (1):

wherein each of R¹, R² and R³, which may be identical or different, is a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, or an aryl group having from 6 to 20 carbon atoms; and n is 1 or 2. The thermally decomposable binder and the fine inorganic particle-dispersed paste composition, each containing an aliphatic polycarbonate resin of the present invention can be used in general molded articles, optical materials such as films, fibers, optical fibers, and optical disks, thermally decomposable materials such as ceramic binders, and lost foam casting, medicinal materials such as drug capsules, additives for biodegradable resins, main components for biodegradable resins, and the like.

Claims

1. A thermally decomposable binder comprising an aliphatic polycarbonate resin comprising a constituting unit represented by the formula (1):

2. The thermally decomposable binder according to claim 1, wherein the content of the constituting unit represented by the formula (1) is from 0.001 to 30% by mol in the entire constituting units constituting the aliphatic polycarbonate resin.

3. The thermally decomposable binder according to claim 1 or 2, wherein the aliphatic polycarbonate resin further comprises a constituting unit represented by the formula (2):

4. The thermally decomposable binder according to claim 1, wherein a mass loss percentage after keeping at 160°

C. for 1 hour in a thermogravimetric analysis is 90% or more.

5. An inorganic particle-dispersed paste composition comprising an aliphatic polycarbonate resin comprising a constituting unit represented by the formula (1):

6. The inorganic particle-dispersed paste composition according to claim 5, wherein the content of the aliphatic polycarbonate resin is from 0.001 to 20 parts by mass, based on 100 parts by mass of the inorganic particles.

7. The inorganic particle-dispersed paste composition according to claim 5 or 6, wherein the inorganic particles are made of at least one member selected from the group consisting of electroconductive particles, ceramic powders, glass powders, and inorganic phosphor particles.

8. An aliphatic polycarbonate resin comprising a constituting unit represented by the formula (1):

9. The aliphatic polycarbonate resin according to claim 8, wherein the content of the constituting unit represented by the formula (1) is from 0.001 to 30% by mol in the entire constituting units constituting the aliphatic polycarbonate resin.

10. The aliphatic polycarbonate resin according to claim 8 or 9, wherein the aliphatic polycarbonate resin further comprises a constituting unit represented by the formula (2):

11. The aliphatic polycarbonate resin according to claim 8, wherein a mass loss percentage after keeping at 160°

C. for 1 hour in a thermogravimetric analysis is 90% or more.