JPH0585771A - Composition for hollow glass sphere - Google Patents

Composition for hollow glass sphere

Info

Publication number
JPH0585771A
JPH0585771A JP6914992A JP6914992A JPH0585771A JP H0585771 A JPH0585771 A JP H0585771A JP 6914992 A JP6914992 A JP 6914992A JP 6914992 A JP6914992 A JP 6914992A JP H0585771 A JPH0585771 A JP H0585771A
Authority
JP
Japan
Prior art keywords
hollow glass
glass
weight
composition
glass spheres
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
Application number
JP6914992A
Other languages
Japanese (ja)
Inventor
Shinji Kawachi
伸治 川地
Yoshifumi Sato
能史 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Electric Glass Co Ltd
Original Assignee
Nippon Electric Glass Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Electric Glass Co Ltd filed Critical Nippon Electric Glass Co Ltd
Priority to JP6914992A priority Critical patent/JPH0585771A/en
Publication of JPH0585771A publication Critical patent/JPH0585771A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C11/00Multi-cellular glass ; Porous or hollow glass or glass particles
    • C03C11/002Hollow glass particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To provide a compsn. for hollow glass spheres having high pressure resistance and excellent adhesivity to synthetic resin. CONSTITUTION:This compsn. for hollow glass spheres consists of, by weight, 40-59% SiO2, 2-17% R2O (R2O is one or more among Li2O, Na2O and K2O), 1-25% B2O3, 5-25% RO (RO is one or more among CaO, MgO, BaO, ZnO, and SrO), 6-40% RO2 (RO2 is TiO2 and/or ZrO2), 0-13% Al2O3, 0-3% P2O5 and 0.1-1.0% SO3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、中空ガラス球用組成
物、特に合成樹脂の強化、軽量化に有用な中空ガラス球
用組成物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for hollow glass spheres, and more particularly to a composition for hollow glass spheres which is useful for strengthening synthetic resin and reducing weight.

【0002】[0002]

【従来の技術】中空ガラス球は、各種合成樹脂にその強
化と軽量化のために充填材として用いられいる。この種
の中空ガラス球には、合成樹脂の射出成型時あるいは加
圧成型時の圧力によって破壊しないように高い耐圧強度
が必要であり、また、合成樹脂の強化という立場から合
成樹脂との十分な密着性が必要である。
2. Description of the Related Art Hollow glass spheres are used as fillers in various synthetic resins in order to strengthen and reduce their weight. This kind of hollow glass sphere requires high pressure resistance so as not to be broken by the pressure during injection molding or pressure molding of synthetic resin, and from the standpoint of strengthening synthetic resin, it is sufficient Adhesion is required.

【0003】従来、上記用途に用いられる中空ガラス球
として種々のガラスが市販されて実用に供されている。
Various glasses have hitherto been put on the market for practical use as hollow glass spheres used for the above purposes.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記従
来の中空ガラス球は、耐圧強度が不十分であり合成樹脂
の成型時その高い圧力のために破壊してしまう場合があ
った。また、中空ガラス球と合成樹脂との密着性は、中
空ガラス球のアルカリ溶出量の如何によるが、従来の中
空ガラス球は耐水性が悪くガラスよりアルカリが溶出し
て合成樹脂との密着性が阻害され、そのために強化の作
用が十分ではなかった。
However, the above-mentioned conventional hollow glass spheres have insufficient pressure resistance and may be broken due to the high pressure during molding of synthetic resin. Further, the adhesion between the hollow glass spheres and the synthetic resin depends on the amount of alkali elution of the hollow glass spheres, but the conventional hollow glass spheres have poor water resistance and the alkali is leached out of the glass, resulting in poor adhesion to the synthetic resin. It was inhibited and, as a result, the strengthening effect was not sufficient.

【0005】本発明は上記事情に鑑みてなされたもので
あり、本発明の目的は、高い耐圧強度を有し、合成樹脂
との密着性に優れた中空ガラス球用組成物を提供するこ
とにある。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a composition for hollow glass spheres, which has high pressure resistance and is excellent in adhesion to a synthetic resin. is there.

【0006】[0006]

【課題を解決するための手段】本発明の中空ガラス球用
組成物は、重量%で以下の組成、 SiO2 40〜59 R2 O 2〜17 (R2 OはLi2 O、Na2 O、K2 Oから選ばれた一
者または二者以上) B23 1〜25 RO 5〜25 (ROはCaO、MgO、BaO、ZnO、SrOから
選ばれた一者または二以上) RO2 6〜40 (RO2 はTiO2、ZrO2 から選ばれた一者または二
者) Al23 0〜13 P25 0〜3 SO3 0.1〜1.0 からなることを特徴とする。更に好ましくは SiO2 42〜58 R2 O 3〜16 (R2 OはLiO2 、Na2 O、K2 Oから選ばれた一
者または二者以上) B23 3〜23 RO 6〜22 (ROはCaO、MgO、BaO、ZnO、SrOから
選ばれた一者または二者以上) RO2 7〜26 (RO2 はTiO2 、ZrO2 から選ばれた一者または
二者以上) Al23 0〜11 P25 0〜2 SO3 0.2〜0.8 からなることを特徴とする。
The composition for hollow glass spheres of the present invention has the following composition by weight%: SiO 2 40 to 59 R 2 O 2 to 17 (R 2 O is Li 2 O and Na 2 O). , One or two or more selected from K 2 O) B 2 O 3 1 to 25 RO 5 to 25 (RO is one or more selected from CaO, MgO, BaO, ZnO, and SrO) RO 2 6 to 40 (RO 2 is one or two selected from TiO 2 and ZrO 2 ) Al 2 O 3 0 to 13 P 2 O 5 0 to 3 SO 3 0.1 to 1.0 And More preferably, SiO 2 42 to 58 R 2 O 3 to 16 (R 2 O is one or more selected from LiO 2 , Na 2 O and K 2 O) B 2 O 3 3 to 23 RO 6 to 22 (RO is one or more selected from CaO, MgO, BaO, ZnO and SrO) RO 2 7 to 26 (RO 2 is one or more selected from TiO 2 and ZrO 2 ) Al 2 O 3 0 to 11 P 2 O 5 0 to 2 SO 3 0.2 to 0.8.

【0007】上記した本発明の組成を有する中空ガラス
球は次のようにして製造される。まず、シリカ、アルミ
ナ、硼酸等のガラス原料及び発泡材としての芒硝を目標
組成になるよう調合したガラスバッチを1300℃で2
時間溶融してガラスを製作する。次いでこのガラスを粉
砕、分級して53μm以下のガラス粉にし、その後この
ガラス粉を1400℃程度の火炎中に通過させて再溶融
し前記芒硝によりガラス中に溶解したSO3 からSO2
ガスを発生させ中空ガラス球とする。最後にこの中空ガ
ラス球を水に入れて浮上する中空ガラス球を採取する。
このようにして得られた中空ガラス球は、肉厚が0.5
〜20μm、直径が1〜130μmであった。
The hollow glass sphere having the above-mentioned composition of the present invention is manufactured as follows. First, a glass batch prepared by mixing glass raw materials such as silica, alumina, boric acid and the like and Glauber's salt as a foaming material so as to have a target composition at 2300 ° C.
It is melted for a time to make glass. Next, this glass was crushed and classified to a glass powder of 53 μm or less, and then this glass powder was passed through a flame at about 1400 ° C. to be remelted and SO 3 to SO 2 dissolved in the glass with the above-mentioned Glauber's salt.
Gas is generated to form hollow glass spheres. Finally, the hollow glass spheres are placed in water and the floating hollow glass spheres are collected.
The hollow glass spheres thus obtained have a wall thickness of 0.5.
It was -20 μm and the diameter was 1-130 μm.

【0008】[0008]

【作用】中空ガラス球の耐圧強度は、下記式で表され
る。
The pressure resistance of the hollow glass sphere is expressed by the following formula.

【0009】[0009]

【数1】 [Equation 1]

【0010】この式において、Pは耐圧強度、Eはガラ
スのヤング率、tは肉厚、rは半径、νはガラスのポア
ソン比を示す。この式から明らかなように、肉厚と半径
が同じ同一形状の中空ガラス球であればその耐圧強度は
ガラスのヤング率とポアソン比とで決定されるところ、
ポアソン比はどのガラスでもほぼ同一であるので、中空
ガラス球の耐圧強度は実質的にガラスのヤング率にのみ
依ることになる。従って、本発明では、ヤング率を耐圧
強度の指標とする。
In this equation, P is the compressive strength, E is the Young's modulus of glass, t is the wall thickness, r is the radius, and ν is the Poisson's ratio of the glass. As is clear from this formula, if the hollow glass spheres of the same shape with the same wall thickness and radius, the pressure resistance is determined by the Young's modulus and Poisson's ratio of the glass,
Since the Poisson's ratio is almost the same for all glasses, the compressive strength of the hollow glass sphere substantially depends only on the Young's modulus of the glass. Therefore, in the present invention, Young's modulus is used as an index of pressure resistance.

【0011】中空ガラス球の製造上具備すべき条件は次
の通りである。まず、不均質なガラスであると中空ガラ
ス球の耐圧強度が著しく低くなるため、溶融の際、溶融
性が良好であり、ガラスに結晶が析出する失透現象がな
く、しかも溶融ガラス中に不溶解なゴールが発生しない
ことが必要である。また、ガラス粉を再溶融して中空ガ
ラス球にする際、球が破壊しない程度の適切な量のガス
を発生することが必要がある。
The conditions that must be met for the production of hollow glass spheres are as follows. First of all, if the glass is inhomogeneous, the hollow glass spheres have a significantly low compressive strength, so the meltability is good during melting, there is no devitrification phenomenon in which crystals precipitate in the glass, and there is no It is necessary that no melting goals occur. Further, when remelting the glass powder into hollow glass spheres, it is necessary to generate an appropriate amount of gas such that the spheres are not broken.

【0012】上記の製造上の条件以外に中空ガラス球に
要求される特性としては、先記したように高い耐圧強
度、すなわちそれの指標とされる高いヤング率を有する
こと、ガラスからのアルカリ溶出量が少ないことが必要
である。
In addition to the above manufacturing conditions, the properties required of the hollow glass sphere are, as mentioned above, high compressive strength, that is, high Young's modulus as an index thereof, and alkali elution from glass. It needs to be small.

【0013】本発明の中空ガラス球用組成物は、ガラス
の組成を構成する成分を適切なものに選択し、且つその
成分の含有量を特定範囲にすることにより上記中空ガラ
ス球の製造上の条件ならびに中空ガラス球としての特性
を満足させたものである。以下にそのガラス組成の限定
理由を説明する。
The composition for hollow glass spheres of the present invention is suitable for producing the above-mentioned hollow glass spheres by appropriately selecting the components constituting the composition of the glass and setting the content of the components in a specific range. It satisfies the conditions and the characteristics as a hollow glass sphere. The reasons for limiting the glass composition will be described below.

【0014】SiO2 は、ガラスのネットワークフォー
マーを形成する成分であり、40重量%より少ないとガ
ラスのアルカリ溶出量が増加し、59重量%より多いと
溶融性が悪化する。より好ましくはSiO2 は42重量
%から58重量%である。
SiO 2 is a component forming a glass network former. If it is less than 40% by weight, the amount of alkali elution of glass increases, and if it exceeds 59% by weight, the meltability deteriorates. More preferably, SiO 2 is 42 wt% to 58 wt%.

【0015】R2 Oは、Li2 O、Na2 O、K2 Oか
ら選ばれた一者または二者以上の成分であり、ガラスの
融剤として用いられ、2重量%より少ないとガラスの溶
融性が低下し、17重量%を超えるとガラスのアルカリ
溶出量が増加する。より好ましくはR2 Oは3重量%か
ら16重量%である。
R 2 O is one or more components selected from Li 2 O, Na 2 O and K 2 O, and is used as a flux for glass. Meltability decreases, and when it exceeds 17% by weight, the amount of alkali elution of glass increases. More preferably R 2 O is 3% to 16% by weight.

【0016】B23 は、1重量%より少ないとガラス
の溶融性が低下すると共にガラスのアルカリ溶出量が多
くなり、25重量%より多いと中空ガラス球の耐圧強度
が低下する。より好ましくはB23 は3重量%から2
3重量%である。
If the content of B 2 O 3 is less than 1% by weight, the melting property of the glass is lowered and the amount of alkali elution of the glass is increased, and if it is more than 25% by weight, the pressure resistance of the hollow glass sphere is lowered. More preferably B 2 O 3 is from 3% by weight to 2
It is 3% by weight.

【0017】ROはCaO、MgO、BaO、ZnO、
SrOから選ばれた一者または二者以上の成分であり、
5重量%より少ないとガラスの溶融性が悪化し、25重
量%を超えるとガラスが失透して好ましくない。より好
適には、ROは6重量%から22重量%である。
RO is CaO, MgO, BaO, ZnO,
One or more components selected from SrO,
If it is less than 5% by weight, the meltability of the glass is deteriorated, and if it exceeds 25% by weight, the glass is devitrified, which is not preferable. More preferably, RO is 6% to 22% by weight.

【0018】RO2 は、TiO2 、ZrO2 から選ばれ
た一者または二者の成分であり、6重量%より少ない場
合は中空ガラス球の耐圧強度が低下すると共にガラスか
らのアルカリ溶出量が増加し、40重量%より多い場合
はガラスが失透する。より好ましくはRO2 は7重量%
から26重量%である。
RO 2 is one or two components selected from TiO 2 and ZrO 2. If it is less than 6% by weight, the pressure resistance of the hollow glass spheres is lowered and the amount of alkali elution from the glass is reduced. If it increases, and if it exceeds 40% by weight, the glass devitrifies. More preferably RO 2 is 7% by weight
To 26% by weight.

【0019】Al23 は多すぎる場合、溶融性の低下
を招くため上限を13重量%とする。より好ましくはA
23は11重量%以下である。
If the amount of Al 2 O 3 is too large, the melting property is lowered, so the upper limit is made 13% by weight. More preferably A
The l 2 O 3 content is 11% by weight or less.

【0020】P25 はSO3 のガラスへの溶解を促進
させる成分であるが、3重量%を超えると溶融ガラスに
不溶解物のゴールが発生する。P25 のより好ましい
組成範囲は2重量%以下である。
P 2 O 5 is a component that accelerates the dissolution of SO 3 in glass, but if it exceeds 3% by weight, the goal of insoluble matter is generated in the molten glass. A more preferable composition range of P 2 O 5 is 2% by weight or less.

【0021】SO3 はSO2 ガスを発生させて中空ガラ
ス球を作る成分であり、0.1重量%より少ないと中空
ガラス球とならず、1重量%より大きいと溶融ガラスに
不溶解物のゴールが生じる。SO3 のより好適な組成範
囲は0.2重量%から0.8重量%である。
SO 3 is a component that generates SO 2 gas to form hollow glass spheres. If it is less than 0.1% by weight, it does not become a hollow glass sphere, and if it is more than 1% by weight, it is an insoluble matter in molten glass. Goal occurs. A more preferable composition range of SO 3 is 0.2% by weight to 0.8% by weight.

【0022】[0022]

【実施例】次に、本発明の実施例について説明する。EXAMPLES Next, examples of the present invention will be described.

【0023】[0023]

【表1】 [Table 1]

【0024】表1の試料No.1〜No.13は、本発
明の中空ガラス球のガラス組成を示しており、同表下段
にはこれら試料のヤング率とアルカリ溶出量を示してあ
る。尚、ヤング率はJIS R1602の超音波パルス
法で、アルカリ溶出量はJIS R3502で測定し
た。
Sample No. 1 in Table 1 1-No. 13 shows the glass composition of the hollow glass sphere of the present invention, and the Young's modulus and alkali elution amount of these samples are shown in the lower part of the table. The Young's modulus was measured by the ultrasonic pulse method of JIS R1602, and the alkali elution amount was measured by JIS R3502.

【0025】表1から本発明のガラスはヤング率が高
く、アルカリ溶出量が低いことがわかる。
It can be seen from Table 1 that the glass of the present invention has a high Young's modulus and a low alkali elution amount.

【0026】[0026]

【発明の効果】以上説明したように、本発明の中空ガラ
ス球用組成物はヤング率が高く、アルカリ溶出量が少な
いため、耐圧強度及び合成樹脂との密着性が良好であ
り、特に合成樹脂の強化と軽量化に最適である。
As described above, since the composition for hollow glass spheres of the present invention has a high Young's modulus and a small amount of alkali elution, it has good pressure resistance and good adhesion to synthetic resins. Ideal for strengthening and reducing weight.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 重量%で、以下の組成 SiO2 40〜59 R2 O 2〜17 (R2 OはLi2 O、Na2 O、K2 Oから選ばれた一
者または二者以上) B23 1〜25 RO 5〜25 (ROはCaO、MgO、BaO、ZnO、SrOから
選ばれた一者または二以上) RO2 6〜40 (RO2 はTiO2、ZrO2 から選ばれた一者または二
者) Al23 0〜13 P25 0〜3 SO3 0.1〜1.0 からなることを特徴とする中空ガラス球用組成物。
1. A composition, by weight, having the following composition: SiO 2 40 to 59 R 2 O 2 to 17 (R 2 O is one or more selected from Li 2 O, Na 2 O and K 2 O) B 2 O 3 1 to 25 RO 5 to 25 (RO is one or more selected from CaO, MgO, BaO, ZnO, and SrO) RO 2 6 to 40 (RO 2 is selected from TiO 2 and ZrO 2 One or two) Al 2 O 3 0 to 13 P 2 O 5 0 to 3 SO 3 0.1 to 1.0, a composition for hollow glass spheres.
【請求項2】 重量%で以下の組成 SiO2 42〜58 R2 O 3〜16 (R2 OはLi2 O、Na2 O、K2 Oから選ばれた一
者または二者以上) B23 3〜23 RO 6〜22 (ROはCaO、MgO、BaO、ZnO、SrOから
選ばれた一者または二者以上) RO2 7〜26 (RO2 はTiO2 、ZrO2 から選ばれた一者または
二者) Al23 0〜11 P25 0〜2 SO3 0.2〜0.8 からなる請求項1の中空ガラス球用組成物。
2. The following composition by weight%: SiO 2 42 to 58 R 2 O 3 to 16 (R 2 O is one or more selected from Li 2 O, Na 2 O and K 2 O) B 2 O 3 3-23 RO 6-22 (RO is one or more selected from CaO, MgO, BaO, ZnO and SrO) RO 2 7 to 26 (RO 2 is selected from TiO 2 and ZrO 2 One or two) Al 2 O 3 0 to 11 P 2 O 5 0 to 2 SO 3 0.2 to 0.8 The composition for hollow glass spheres according to claim 1.
JP6914992A 1991-03-29 1992-02-18 Composition for hollow glass sphere Pending JPH0585771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6914992A JPH0585771A (en) 1991-03-29 1992-02-18 Composition for hollow glass sphere

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9327391 1991-03-29
JP3-93273 1991-03-29
JP6914992A JPH0585771A (en) 1991-03-29 1992-02-18 Composition for hollow glass sphere

Publications (1)

Publication Number Publication Date
JPH0585771A true JPH0585771A (en) 1993-04-06

Family

ID=26410334

Family Applications (1)

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Country Status (1)

Country Link
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Cited By (14)

* Cited by examiner, † Cited by third party
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US6335083B1 (en) 1997-04-18 2002-01-01 3M Innovative Properties Company Transparent beads and their production method
US6514892B1 (en) 1997-04-18 2003-02-04 3M Innovative Properties Company Transparent beads and their production method
KR100431727B1 (en) * 1997-09-29 2004-09-04 삼성코닝 주식회사 Substrate glasses for plasma display panel
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