JPS58135173A - Ceramic composition for injection moldings - Google Patents
Ceramic composition for injection moldingsInfo
- Publication number
- JPS58135173A JPS58135173A JP57017654A JP1765482A JPS58135173A JP S58135173 A JPS58135173 A JP S58135173A JP 57017654 A JP57017654 A JP 57017654A JP 1765482 A JP1765482 A JP 1765482A JP S58135173 A JPS58135173 A JP S58135173A
- Authority
- JP
- Japan
- Prior art keywords
- room temperature
- ceramic composition
- volume
- composition
- ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims description 22
- 239000000919 ceramic Substances 0.000 title claims description 14
- 238000001746 injection moulding Methods 0.000 title claims description 11
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- -1 fatty acid diester Chemical class 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 claims 2
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims 2
- 230000007547 defect Effects 0.000 description 7
- 238000005238 degreasing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、射出成形に好適するセラミック組成物に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a ceramic composition suitable for injection molding.
一般にセラミック製品は通常粉末状のセラミック材料と
樹脂成分を混練し、これを成形、脱脂、焼結することに
より装填される。Ceramic products are generally loaded by kneading a powdered ceramic material and a resin component, molding, degreasing, and sintering the mixture.
ここでセラミック材料と混合される樹脂は成形の際のバ
インダーとしての役割を果たすものであり、後工程の脱
脂工程と重要な関係を有し、樹脂の選択を誤まると脱脂
工程で充分に脱脂されなかったり、反対に急激に脱脂さ
れて成形体に欠陥を生ずる等の問題がでてくる。The resin mixed with the ceramic material here plays a role as a binder during molding, and has an important relationship with the degreasing process in the subsequent process. This may cause problems such as not being removed or, conversely, being degreased rapidly, resulting in defects in the molded product.
而して樹脂成分を多量に必要とする押出成形や射出成形
等の成形手段を用いｐ場合、或いは特に肉厚の複雑な形
状の成形体を射出成形法により製造する場合においては
、樹脂成分としてｇｖムとパラフィンを併用する方法が
提示されているが（特開昭５２−１１７９０９号公報）
、この方法においてはこれらの樹脂成分を均一に混合す
ることが難しく、従って歪みのない成形体を得ることが
難しいという難点があった。Therefore, when using a molding method such as extrusion molding or injection molding that requires a large amount of resin component, or when producing a molded article with a particularly thick and complicated shape by injection molding, the resin component A method of using gvum and paraffin in combination has been proposed (Japanese Unexamined Patent Publication No. 117909/1982).
However, this method has the disadvantage that it is difficult to uniformly mix these resin components, and therefore it is difficult to obtain a molded article without distortion.
本発明はこのような従来の難点を解消するためなされた
もので、混合が容易で均一な組成を有し、成形性が高く
脱脂処理後も欠陥を生じない射出成形用セラミック組成
物を提供することを目的とする。The present invention has been made to solve these conventional problems, and provides a ceramic composition for injection molding that is easy to mix, has a uniform composition, has high moldability, and does not cause defects even after degreasing treatment. The purpose is to
すなわち本発明はセラミック粉末に、（イ）ＥＶＡ樹脂
と（（ロ）パラフィンとからなる常温で固体の結合成分
と、常温で液状の（ハ）ジオクチルフタレートやジエチ
ルフタレートのよう、な高級脂肪酸のジエステル類、お
よび必要に応じてに）流動促進剤を混合して成ることを
特徴とする射出成形用セラミック組成物に関する。That is, the present invention combines a ceramic powder with (a) a binding component that is solid at room temperature consisting of EVA resin and (b) paraffin, and (c) a diester of a higher fatty acid such as dioctyl phthalate or diethyl phthalate, which is liquid at room temperature. The present invention relates to a ceramic composition for injection molding, characterized in that it contains a glidant (as required).
ここでセラミック粉末としては、ｓｔ、Ｎ４、ＡＩＭ。Here, the ceramic powders include st, N4, and AIM.
ＴｉＮのような窒化物系、Ｓｉ、ＯＮ、 のような酸
窒化物系、８１Ｃ，ｌ、Ｃ，Ｔｉｃ、 ＺｒＣ（７）よ
うな炭化物系、８１．Ｎ、−８ｉＣのような炭窒化物系
、或いはムｌ！０３、ＺｒＯ２，ＭｇＡ１１０４（７）
ような酸化物系のものが使用される。Nitride systems such as TiN, oxynitride systems such as Si, ON, 81C, C, Tic, carbide systems such as ZrC (7), 81. Carbonitrides such as N, -8iC, or mulch! 03, ZrO2, MgA1104 (7)
Oxide-based materials such as
常温で固体の結合成分のうち、（イ）ＥＶムは接着性が
良好で上記セラミック材料の結合に有効な役割を果たす
ものであり、（ｃ４パラフィンは結合力はそれほど高く
ないが成形性が大きい。従って本発明においてはこれら
の常温で固体の結合成分のそれぞれの配合量の比を、容
量で（イ）：Ｉｐ）−１：ｔ〜１：９の範囲にすること
が望ましい。Among the bonding components that are solid at room temperature, (a) EV rubber has good adhesive properties and plays an effective role in bonding the above ceramic materials; (c4 paraffin does not have very high bonding strength but has high formability Therefore, in the present invention, it is desirable that the ratio of the amounts of these bonding components that are solid at room temperature be in the range of (a):Ip)-1:t to 1:9 in terms of volume.
またｇｖムの重合度は組成物の流動性を大きく左右する
ので、本発明においては重合度がｓｏｏ。Furthermore, since the degree of polymerization of gvm greatly affects the fluidity of the composition, in the present invention, the degree of polymerization is so.
〜５ｏｏｏｏのものを用いるのが望ましい。It is desirable to use one with a value of 500 to 500.
さらに本発明において用いる（ハ）高級脂肪酸ジエステ
ル類は、常温で液状であり常温におけるバインダーとし
ての効果をちりばかりでなく、可塑剤として前記（（）
ＥＶムおよび一パラフィンのセラミック粉末との混合を
助け、見かけの溶融粘度な下げる効果を有する。Furthermore, the (c) higher fatty acid diesters used in the present invention are liquid at room temperature and have an effect not only as a binder at room temperature but also as a plasticizer (()
It aids in mixing EV and paraffin with ceramic powder, and has the effect of lowering the apparent melt viscosity.
この上うなＧ−４高級脂肪酸ジエステル類の配合量は前
記常瀧で固体の結合成分に対し、ｉ量比でｌ：２〜７：
１の範囲にあることが望ましい。Moreover, the blending amount of Una G-4 higher fatty acid diesters is 1:2 to 7:
It is desirable that it be in the range of 1.
さらにこれら（イ）、同、および（ハ）−分の配合量の
合計は、組成物全体の３０〜６０容量％であることが望
ましい。Further, it is desirable that the total amount of these components (a), (a), and (c) is 30 to 60% by volume of the entire composition.
これらの結合成分の配合量の合計をこのように限定した
のは、３０容量％未満では組成物の成形性が不充分で射
出成形に適きず、逆に６０容普％を越えた場合には、結
合威容が多すぎて完全に脱脂することが難しく、焼結後
の成形体に欠陥を生じやすいためである。□
本発明において必要に応じて添加するに）流動促進剤と
しては、金属石けんのような界面活性剤や有機チタネー
ト、有機シリケート、或いはカンフルなどがある。
′
これらの成分は、前述の各成分の混合をさらに容易にす
る効果を有するものであり、組成物全体の０．０１〜１
容量％添加するのが望ましい。□流動促進剤の添加量を
このように限定したのは、０、Ｏ１１容量未満では添加
による効果がほとんどなく、反対にｉ容量％を越えた場
合には、他の特性を低下させ好ましくないからである。The reason why the total amount of these binding components is limited is that if it is less than 30% by volume, the composition will have insufficient moldability and will not be suitable for injection molding, whereas if it exceeds 60% by volume, the composition will not be suitable for injection molding. This is because the bond strength is too large and it is difficult to completely degrease, and defects are likely to occur in the molded product after sintering. □ Examples of the glidant (added as needed in the present invention) include surfactants such as metal soaps, organic titanates, organic silicates, and camphor.
' These components have the effect of further facilitating the mixing of the above-mentioned components, and account for 0.01 to 1 of the total composition.
It is desirable to add % by volume. □The reason why the amount of glidant added is limited in this way is because if the volume is less than 0,011 volume, there is almost no effect by adding it, and if it exceeds i volume%, on the other hand, other properties will deteriorate, which is undesirable. It is.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
窒化ケイ素粉末１００容量部に対して、ＥＶＡ７容量部
、固形パラフィンｌＯ容量部、およびジオクールフタレ
ート３０容量部を加え常温で混練した。混線の結果均一
な組成の窒化ケイ素組成物が得られた。これを１９０℃
、８００−の条件で射出成形してセラミック被状体を得
、次いでこれを炉中に入れ５′００℃まで談階的に加熱
して脱脂を行なった。脱脂後の成形体の重量を測定した
ところ、充分に脱脂されていることが分かった。また成
形体に歪み、亀裂、穴、その他の欠陥は見ら糺なかった
。次にこの成形体を１７５０℃で焼結したところ、歪み
や欠陥のない良好な特性の窒化ケイ素焼結体が得られた
。一方ジオクチルフタレートを添加しな“い従来の組成
物にて実施例と同様の条件で成形、脱脂を行なつたとこ
ろ３０個のうち１２個に欠陥がみられた。To 100 parts by volume of silicon nitride powder, 7 parts by volume of EVA, 10 parts by volume of solid paraffin, and 30 parts by volume of geocool phthalate were added and kneaded at room temperature. As a result of the crosstalk, a silicon nitride composition with a uniform composition was obtained. This at 190℃
A ceramic cover was obtained by injection molding under conditions of . When the weight of the molded article after degreasing was measured, it was found that the molded article had been sufficiently degreased. Moreover, no distortions, cracks, holes, or other defects were observed in the molded product. Next, this molded body was sintered at 1750°C, and a silicon nitride sintered body with good characteristics and no distortion or defects was obtained. On the other hand, when a conventional composition containing no dioctyl phthalate was molded and degreased under the same conditions as in the example, defects were found in 12 out of 30 pieces.
以上の記載から明らかなように、本発明のセラミック組
成物によれば、混合が容易で均一に混練することができ
るばかりでなく、混合した樹脂の脱脂がしやすく脱脂お
よび焼結処理Ｃ二より歪みや欠陥のない均一な組成の成
形体を製造することができる。As is clear from the above description, according to the ceramic composition of the present invention, it is not only easy to mix and uniformly knead, but also the mixed resin can be easily degreased by degreasing and sintering treatment C2. A molded article having a uniform composition without distortion or defects can be produced.
（７３１７）代理人弁理士 則 近 憲 佑（ほか１名
）(7317) Representative Patent Attorney Noriyuki Chika (and 1 other person)
Claims (1)
合体（以下ｇｖムと略す。）樹脂と（ロ）パラフィンか
らなる常温で固体の結合成分と、常温で液状の（ハ）高
級脂肪酸ジエステルと、および必要に応じてに）流動促
進剤とを混合して成ることを特徴とする射出成形用セラ
ミック組成物。 ２、常温で固体の結合成分と常温で液状の高級脂肪酸ジ
エステルの配合合計量が、組成物全体の３０〜６０容量
％である特許請求の範囲第１項記載の射出成形縞物。 ６、常温で固体の結合成分と常温で液状の高級脂肪酸ジ
エステルの配合量（容量）２比が、１：２から７：ｌの
範囲にある特許請求の範囲第１項又は１８２項記載の射
出成形用セラミック組成物。 ４、ＥＶＡ樹脂とパラフィンの配合量（容量）の比が、
１：１からｌ：９の範囲にある特許請求の範囲第１項乃
至第６項のいずれか１項記載の射出成形用セラミック組
成物。[Claims] 1. Ceramic powder contains (a) an ethylene vinyl acetate copolymer (hereinafter abbreviated as GV) resin and (b) a binding component that is solid at room temperature and consists of paraffin, and (a) that is liquid at room temperature. 3) A ceramic composition for injection molding, comprising a mixture of a higher fatty acid diester and, if necessary, a glidant. 2. The injection molded striped article according to claim 1, wherein the total amount of the binding component that is solid at room temperature and the higher fatty acid diester that is liquid at room temperature is 30 to 60% by volume of the entire composition. 6. Injection according to claim 1 or 182, wherein the ratio of the amount (volume) of the binding component that is solid at room temperature to the higher fatty acid diester that is liquid at room temperature is in the range of 1:2 to 7:l. Ceramic composition for molding. 4. The ratio of the amount (capacity) of EVA resin and paraffin is
Ceramic composition for injection molding according to any one of claims 1 to 6, in the range of 1:1 to 1:9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57017654A JPS58135173A (en) | 1982-02-08 | 1982-02-08 | Ceramic composition for injection moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57017654A JPS58135173A (en) | 1982-02-08 | 1982-02-08 | Ceramic composition for injection moldings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58135173A true JPS58135173A (en) | 1983-08-11 |
Family
ID=11949837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57017654A Pending JPS58135173A (en) | 1982-02-08 | 1982-02-08 | Ceramic composition for injection moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58135173A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137863A (en) * | 1983-12-22 | 1985-07-22 | 松下電器産業株式会社 | Manufacture of extrusion forming raw material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50126012A (en) * | 1974-03-23 | 1975-10-03 |
-
1982
- 1982-02-08 JP JP57017654A patent/JPS58135173A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50126012A (en) * | 1974-03-23 | 1975-10-03 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137863A (en) * | 1983-12-22 | 1985-07-22 | 松下電器産業株式会社 | Manufacture of extrusion forming raw material |
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