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Slurry composition, ceramic green sheet and coated sheet

A technology of composition and slurry, applied in the direction of ceramics, conductive layers on insulating carriers, inorganic insulators, etc., can solve problems such as electrode layer deformation, component reliability reduction, defects, etc., and achieve the suppression of cracks and adhesion Excellent, high storage stability effect

Active Publication Date: 2019-08-23
KURARAY EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In the process of pressing and transferring the electrode layer from the carrier film to the ceramic green sheet, if the pressure bonding is strengthened, the electrode layer will also be deformed, and the high precision required for laminated ceramic parts cannot be achieved.
On the other hand, if the pressure bonding is weakened, the adhesive force between the ceramic green sheet and the electrode layer is weak, and the electrode layer and the ceramic green sheet are not adhered to each other in the conventional manufacturing method.
If such a poor adhesion occurs, not only the electrode layer cannot be formed, but also defects may occur after firing the ceramic laminate, and there is a problem that the reliability of the parts will decrease.

Method used

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  • Slurry composition, ceramic green sheet and coated sheet
  • Slurry composition, ceramic green sheet and coated sheet
  • Slurry composition, ceramic green sheet and coated sheet

Examples

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Comparison scheme
Effect test

Embodiment

[0194] Hereinafter, the present invention will be described in further detail based on Examples and Comparative Examples. In addition, in the following examples and comparative examples, "polymerization degree" means "viscosity average polymerization degree". In addition, in the following examples and comparative examples, a "ceramic green sheet" refers to a portion not including a polyester film as a support.

[0195] [Evaluation method]

[0196] 1. Determination of polyvinyl acetal

[0197] The polyvinyl acetal used in Examples and Comparative Examples has a vinyl acetate monomer unit content (mol %), acetalization degree (mol %), and vinyl alcohol monomer unit content (mol %) in accordance with JIS K 6728:1977 and determined. The viscosity-average degree of polymerization of polyvinyl acetal is represented by the viscosity-average degree of polymerization of PVA as a raw material measured in accordance with JIS K 6726:1994.

[0198] 2. Determination of Solubility Parame...

Synthetic example 1

[0280] Into a 10-liter glass container equipped with a reflux condenser, a thermometer, and an anchor stirring blade, 7,280 g of ion-exchanged water, polyvinyl alcohol (hereinafter, referred to as PVA-1) with a degree of polymerization of 1,700 and a degree of saponification of 98.4 mol % were charged. 720 g (PVA concentration: 9.0% by mass), the temperature of the contents was raised to 95° C., and the PVA was completely dissolved. Next, the contents were slowly cooled to 10° C. over about 30 minutes while stirring the contents at 120 rpm, and then 400 g of n-butyraldehyde and 830 mL of 20% by mass hydrochloric acid were added to the container to perform a butyralization reaction for 150 minutes. Thereafter, the temperature was raised to 70° C. over 90 minutes, maintained at 70° C. for 120 minutes, and then cooled to room temperature. After the precipitated resin was washed with ion-exchanged water, an excess sodium hydroxide aqueous solution was added for neutralization. Ne...

Synthetic example 2

[0282] Polyvinyl butyral (PVB-2) was obtained in the same manner as in Synthesis Example 1, except that PVA having a degree of polymerization and a degree of saponification shown in Table 1 was used instead of PVA-1 and 336 g of n-butyraldehyde was used.

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Abstract

The purposes of the present invention are: to provide a slurry composition which is capable of suppressing the occurrence of cracks after drying, while exhibiting high dispersibility and storage stability at the same time, and a ceramic green sheet and a coated sheet, each of which is produced using this slurry composition; to provide a slurry composition which enables the achievement of a ceramicgreen sheet that exhibits excellent adhesiveness when compression bonded in cases where the ceramic green sheet or a coated sheet is produced using this slurry composition; to provide a ceramic greensheet or a coated sheet, which is not susceptible to delamination in cases where a fired body is produced by laminating the sheets; and to provide a slurry composition which is capable of suppressingthe occurrence of cracks after drying of the slurry composition. The present invention relates to a slurry composition which contains a binder resin (A) that has a hydroxyl group in each molecule, anorganic compound (B) represented by general formula (1), an organic solvent (C) and an inorganic compound (D), and wherein the difference between the solubility parameter of the binder resin (A) andthe solubility parameter of the organic compound (B), namely |[delta]SP| is 2.1(J / cm<3>)<1 / 2> or less.

Description

technical field [0001] This patent application claims priority under the Paris Convention with respect to Japanese Patent Application No. 2017-011534 (filing date: January 25, 2017), which is hereby incorporated by reference in its entirety into this specification. [0002] The present invention relates to a slurry composition comprising a specific binder resin, a specific organic compound, an organic solvent and an inorganic compound. In addition, the present invention also relates to ceramic green sheets and coated sheets obtained from the above-mentioned slurry composition. Background technique [0003] For polyvinyl acetal, since it can provide a tough film, and has a unique structure with both a hydrophilic hydroxyl group and a hydrophobic acetal group, polyvinyl formal and polyvinyl acetal have been proposed. Butyraldehyde and other resins. [0004] Among them, polyvinyl butyral is widely used as a binder for ceramic molding, various binders, films, and the like. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/06C04B35/634C08K5/11C08L1/28C08L29/14C08L33/00H01G4/12H01G4/232H01G4/30
CPCC04B35/634C08K5/11C08L1/28C08L29/14C08L33/00C08L101/06H01G4/12H01G4/232H01G4/30C04B35/6342C04B35/6365C04B35/63424C04B35/62218C08K3/013H01B3/12H01B5/14
Inventor 岛住夕阳
Owner KURARAY EURO GMBH
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