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Novel aliphatic polycarbonate

A polycarbonate and aliphatic technology, used in the field of thermal decomposition adhesives, can solve problems such as residual carbon components and adverse effects on product performance, and achieve the effect of reducing thermal energy.

Active Publication Date: 2020-04-17
NAT UNIV CORP TOKYO UNIV OF AGRI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, cellulose resin, butyral resin, acrylic resin, etc. are used as binder resins, but these resins have a decomposition temperature of 400°C or higher, and if the degreasing temperature is insufficient, a large amount of carbon components may remain, which may adversely affect the performance of the product.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0160] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples at all. The physical properties and the like of the aliphatic polycarbonate and the like in this example were measured by the following methods.

[0161] [Content of Structural Unit Represented by Formula (1) in Aliphatic Polycarbonate]

[0162] pass 1 H-NMR analyzed the composition ratio of the structural unit in resin, and made the content ratio of the secondary amino group in aliphatic polycarbonate into content of the structural unit represented by formula (1).

[0163] Determination of aliphatic polycarbonates in deuterated chloroform at 25°C 1 H-NMR, the integral value (A) of the peak derived from the methine group adjacent to the carbonate group appearing around 5.0 ppm and the integral of the peak derived from the methylene group adjacent to the secondary amino group appearing around 2.4 ppm were obtained Value (B), the amino group content ...

manufacture example 1

[0178] Production Example 1 [Manufacture of Cobalt Complex Catalyst]

[0179] Add N,N'-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminocobalt (Aldrich 0.30 g (8.3 mmol), 0.10 g (8.5 mmol) of pentafluorobenzoic acid, and 13.3 g of dichloromethane were stirred for 19 hours while introducing air. After distilling off the volatile components under reduced pressure, the cobalt complex represented by the above formula (4-3) was obtained as a brown solid (yield: 0.35 g, yield: 88%).

manufacture example 2a

[0180] Production example 2a [production of epoxide containing secondary amino group protected by benzyl group]

[0181]

[0182] Add 865mg (6.3mmol) of potassium carbonate to a 50mL Schlenk tube equipped with a magnetic stirrer, replace the system with an argon atmosphere, and then add 9.4g of N,N-dimethylformamide (DMF) , 0.72 g (5.3 mmol) of N-benzyl-N-ethylamine and 8.5 g (62 mmol) of epibromohydrin. After stirring at normal temperature for 48 hours, extraction was performed three times with 13.3 g of dichloromethane, and the combined organic layer was washed twice with 30 g of saturated brine and once with 30 g of ion-exchanged water. The organic layer was concentrated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (n-hexane / ethyl acetate=4 / 1 (v / v), Rf=0.53) to obtain N- Benzyl-N-oxiranylmethyl-N-ethylamine (yield: 0.93 g, yield: 91%).

[0183] The structure of the resulting compound is obtained by 1 H-NMR for ident...

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Abstract

Provided is an aliphatic polycarbonate resin that can be used as a thermally decomposable binder capable of thermal decomposition (degreasing) at low temperature. The aliphatic polycarbonate is an aliphatic polycarbonate containing a structural unit represented by formula (1) (in the formula, R1, R2, and R3 are the same or different and represent a hydrogen atom, an optionally substituted C1-15 alkyl group, or an optionally substituted C6-20 aryl group, R4 represents an optionally substituted C1-20 alkyl group or an optionally substituted C6-20 aryl group, and n represents an integer of 0 to 3).

Description

technical field [0001] The present invention relates to an aliphatic polycarbonate containing a novel structure, a thermally decomposable adhesive containing the aliphatic polycarbonate, a slurry composition containing the aliphatic polycarbonate, and the like. Background technique [0002] A slurry composition obtained by dispersing fine particles of an inorganic compound in a solvent together with a binder resin is used to obtain sintered bodies of various shapes. For example, a paste composition composed of metal particles such as silver, copper, nickel, and a binder resin is used when forming a circuit or forming an electrode on a substrate, and ceramic particles such as alumina, zirconia, barium titanate, and silicon carbide are mixed with A paste composition composed of a binder resin is used in the manufacture of electronic components and the like. [0003] The binder resin is removed by thermal decomposition in the degreasing process after molding. Usually, cellulo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/02C08K3/22C08K3/08C08L69/00
CPCC08G64/02C08K3/00C08L69/00C08G64/0241C08K3/013C08K2003/2227C08G64/34C08K2003/0806
Inventor 中野幸司西冈圣司
Owner NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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