WO2012132469A1 - 硬化定形物 - Google Patents
硬化定形物 Download PDFInfo
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- WO2012132469A1 WO2012132469A1 PCT/JP2012/002241 JP2012002241W WO2012132469A1 WO 2012132469 A1 WO2012132469 A1 WO 2012132469A1 JP 2012002241 W JP2012002241 W JP 2012002241W WO 2012132469 A1 WO2012132469 A1 WO 2012132469A1
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Definitions
- the present invention relates to a shaped product made of a cured inorganic fiber.
- Inorganic fibers are lightweight, easy to handle, and excellent in heat resistance. For example, they are used as heat-resistant sealing materials.
- problems have recently been pointed out that inorganic fibers are inhaled into the human body and enter the lungs. Therefore, biosoluble inorganic fibers have been developed that do not cause problems even when inhaled by the human body, or hardly cause them.
- the shaped product manufactured using the biosoluble fiber has a drawback of low absolute strength.
- Patent Document 1 discloses a plaster containing a biosoluble alkali earth silicate metal salt fiber and colloidal silica, and exhibits excellent storage stability by using colloidal silica as a binder. Further, it is said that the storage stability can be further improved by containing a chelating agent such as EDTA (ethylenediaminetetraacetic acid).
- EDTA ethylenediaminetetraacetic acid
- Patent Document 2 discloses that a zonotlite-based calcium silicate board is impregnated with an inorganic binder in order to suppress the generation of dust.
- the present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a high-strength shaped product made of inorganic fibers.
- the present inventors have found that the strength can be increased by treating the shaped product with a curing agent, and have completed the present invention.
- the following cured fixed form and the curing method thereof are provided. 1.
- a shaped product composed of 20 to 99% by weight of biosoluble inorganic fiber containing SiO 2 and alkaline earth metal, and a curing agent made of colloidal silica soaks from the surface of the shaped product, and the surface is cured. Fixed form.
- 2. The shaped product according to 1, wherein a chelating agent not containing metal ions is infiltrated with the curing agent. 3. 3. 3.
- the shaped product according to 2 wherein the chelating agent is EDTA ⁇ H ⁇ 3 (NH 4 ) or EDTA ⁇ 2H ⁇ 2 (NH 4 ). 4). 2. The shaped product according to 1, wherein an acid is infiltrated with the curing agent. 5. 5. The shaped product according to 4, wherein the acid is a hydroxy acid. 6). 5. The shaped product according to 4, wherein the acid is at least one selected from citric acid, malic acid, tartaric acid, and salicylic acid. 7. 2. The shaped product according to 1, wherein the curing agent is acidic type colloidal silica or cationic type colloidal silica. 8). 8.
- the shaped product according to any one of 1 to 8, wherein the inorganic fiber has the following composition. SiO 2 50 to 82% by weight Total 10 to 43% by weight of CaO and MgO 11.
- a method for curing a shaped product which comprises dipping a curing treatment liquid containing colloidal silica into a shaped product composed of 20 to 99% by weight of biosoluble inorganic fibers containing SiO 2 and an alkaline earth metal, and drying. 13. 13.
- a high-strength shaped product made of inorganic fibers can be provided.
- the cured product of the present invention is obtained by treating a shaped product formed using inorganic fibers containing SiO 2 and an alkaline earth metal with a curing agent.
- Colloidal silica can be used as the curing agent.
- examples of colloidal silica include alkali type colloidal silica (pH 8 to 10), acidic type colloidal silica (pH 2 to 6), and cationic type colloidal silica.
- the curing process is performed by, for example, immersing a fixed-form product in a curing process liquid, or applying the curing process liquid (brushing, rolling, etc.) or spraying (showering, spraying, etc.) and curing. Dry after treatment. Since the solvent evaporates from the surface during drying, the solvent moves to the surface, and the colloidal silica also moves to the surface. Since the colloidal silica remains even if the solvent evaporates, the colloidal silica is unevenly distributed near the surface, and as a result, the surface is cured.
- the solvent water, monovalent alcohols such as ethanol and propanol, divalent alcohols such as ethylene glycol, and the like can be used.
- the amount of colloidal silica contained in the shaped product by the curing treatment is an amount that increases the density of the shaped product by, for example, 10% to 150%, preferably 10% to 100%, more preferably 10% to 50%.
- the shaped product is immersed in colloidal silica having a fixed fraction of 10 to 30% for 1 second to several minutes, but this is not limited. You may process once or twice or more.
- the moisture content of the cured shaped product is usually about 5% by weight or less. Confirm the moisture content by the weight before and after drying.
- the above-mentioned curing treatment improves hardness and improves strength and handling (problems such as traces of hands when gripped, peeling during processing, no corners when cut, powder falling, etc.) To do.
- alkaline earth metal ions particularly Ca ions and Mg ions are eluted in the curing solution.
- these ions react with the curing agent on the surface of the shaped product and are heated to 800 ° C. or higher, cracks are generated. This is probably because silica reacts with Ca ions to cause a volume change.
- the shaped product is treated with a chelating agent not containing metal ions and a curing agent. It is considered that the chelating agent captures the eluted alkaline earth metal and simultaneously forms a protective layer, thereby suppressing the reaction between the alkaline earth metal and the curing agent and preventing the occurrence of cracks. Since the chelating agent has two or more electron donating groups, a metal chelate compound can be produced. Examples of the electron donating group include a carboxy group and a hydroxyl group.
- the chelating agent used in the present invention does not contain alkaline earth metals or alkali metals.
- the chelating agent examples include a chelating agent having a composition of EDTA (ethylenediaminetetraacetic acid) ⁇ H ⁇ 3 (NH 4 ), a chelating agent having a composition of EDTA ⁇ 2H ⁇ 2 (NH 4 ), and the like.
- colloidal silica As the curing agent used in combination with the chelating agent, colloidal silica can be used, and alkali type colloidal silica, acidic type colloidal silica, cationic type colloidal silica and the like can be used.
- concentration of the chelating agent can be appropriately set, but when alkali type colloidal silica is used as the curing agent, it is preferably 0.5% by weight or more with respect to the solid content 10% by weight curing treatment liquid.
- the shaped product may be treated with a curing treatment solution having a pH of 6 or less (preferably pH 1 to 6, more preferably 2 to 5, particularly preferably pH 3 to 5). .
- a curing treatment solution having a pH of 6 or less (preferably pH 1 to 6, more preferably 2 to 5, particularly preferably pH 3 to 5).
- the shaped product is treated with an acid and a curing agent.
- the acid may be a weak acid or a strong acid.
- the weak acid include citric acid, malic acid, tartaric acid, salicylic acid, glycolic acid, lactic acid, mandelic acid, benzylic acid, coumaric acid, and acetic acid.
- Strong acids include sulfuric acid, hydrochloric acid, and nitric acid. Is mentioned. Since there is no problem of generated gas, a weak acid is preferable.
- colloidal silica of an acidic type may be used.
- acidic type colloidal silica it is possible to use commercially available products such as silica doll 20A (manufactured by Nippon Chemical Industry Co., Ltd., solid content ratio 20%), cataloid SN (manufactured by JGC Catalysts & Chemicals Co., Ltd., solid content ratio 20%). it can.
- Examples of those having both the chelating effect and the property of making pH acidic include hydroxy acids such as citric acid, malic acid, tartaric acid and salicylic acid.
- Cationic colloidal silica is colloidal silica having a positive charge on the surface.
- the surface of the colloidal silica or the inside thereof may contain a compound of a polyvalent metal ion such as an aluminum ion or an organic cationic compound so that the surface of the silica particles is cationically charged.
- commercially available products such as Snowtex AK (manufactured by Nissan Chemical Industries, Ltd., solid content ratio 18%) can be used.
- the shaped product of the present invention is composed of inorganic fibers.
- it is composed of 20 to 99% by weight (preferably 30 to 95% by weight) of inorganic fibers.
- the inorganic fiber is preferably composed mainly of SiO 2 , CaO, and MgO.
- a main component means that 90 weight% or more or 95 weight% or more is comprised combining these.
- the inorganic fiber may be a biosoluble fiber having the following composition. Total of SiO 2 , ZrO 2 , Al 2 O 3 and TiO 2 50 wt% to 82 wt% Total of 18% to 50% by weight of alkali metal oxide and alkaline earth metal oxide
- the inorganic fiber may be a biosoluble fiber having the following composition. SiO 2 50 to 82% by weight Total 10 to 43% by weight of CaO and MgO
- Biologically soluble fibers can be broadly classified into Mg silicate fibers rich in MgO and Ca silicate fibers rich in CaO.
- the following composition can be illustrated as Mg silicate fiber. SiO 2 66-82% by weight CaO 1-9% by weight MgO 10-30% by weight Al 2 O 3 3 wt% or less Other oxides Less than 2 wt%
- the following composition can be illustrated as Ca silicate fiber.
- SiO 2 66-82 wt% (for example, it can be 68-80 wt%, 70-80 wt%, 71-80 wt% or 71-76 wt%)
- CaO 10-34% by weight (for example, it can be 18-32% by weight, 20-30% by weight, 20-27% by weight or 21-26% by weight)
- MgO 3 wt% or less eg, 1 wt% or less
- Al 2 O 3 5% by weight or less for example, 3.5% by weight or less, 3.4% by weight or less, or 3% by weight or less.
- Other oxides ⁇ 2% by weight
- the total of SiO 2 , CaO, MgO and Al 2 O 3 may be more than 98 wt% or more than 99 wt%.
- the biosoluble inorganic fiber includes alkali metal oxides (K 2 O, Na 2 O, Li 2 O, etc.), Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb as other components. , Dy, Ho, Er, Tm, Yb, Lu, Y, or a mixture thereof, Fe 2 O 3 , ZrO 2 , TiO 2 , P 2 O 5 , B 2 O 3 , MnO, One or more of ZnO, SrO, BaO, Cr 2 O 3 and the like may or may not be included. Other oxides may be 1.0 wt% or less, 0.2 wt% or less, or 0.1 wt% or less, respectively.
- the alkali metal oxide may contain 1.0% by weight or less, 0.2% by weight or less, or 0.1% by weight or less of each oxide.
- the total of the alkali metal oxides may be 1.0% by weight or less, 0.2% by weight or less, or 0.1% by weight or less.
- the biosoluble fiber may further contain other components in addition to SiO 2 and an alkaline earth metal oxide (for example, at least one of MgO and CaO).
- an alkaline earth metal oxide for example, at least one of MgO and CaO.
- alumina Al 2 O 3
- titania TiO 2
- zirconia ZrO 2
- iron oxide Fe 2 O 3
- manganese oxide MnO
- K 2 O potassium oxide
- the biologically soluble inorganic fiber is, for example, an inorganic fiber having a physiological saline dissolution rate at 40 ° C. of 1% or more.
- the physiological saline dissolution rate is measured, for example, as follows. That is, first, 1 g of a sample prepared by pulverizing inorganic fibers to 200 mesh or less and 150 mL of physiological saline are placed in an Erlenmeyer flask (volume: 300 mL) and placed in an incubator at 40 ° C. Next, a horizontal vibration of 120 revolutions per minute is continuously applied to the Erlenmeyer flask for 50 hours.
- the concentration (mg / L) of each element contained in the filtrate obtained by filtration is measured with an ICP emission analyzer. Then, based on the measured concentration of each element and the content (% by mass) of each element in the inorganic fiber before dissolution, the physiological saline dissolution rate (%) is calculated. That is, for example, when the measurement element is silicon (Si), magnesium (Mg), calcium (Ca), and aluminum (Al), the physiological saline dissolution rate C (%) is calculated by the following equation.
- C (%) [filtrate amount (L) ⁇ (a1 + a2 + a3 + a4) ⁇ 100] / [mass of inorganic fiber before dissolution (mg) ⁇ (b1 + b2 + b3 + b4) / 100].
- a1, a2, a3 and a4 are the measured concentrations of silicon, magnesium, calcium and aluminum (mg / L), respectively, and b1, b2, b3 and b4 are respectively in the inorganic fibers before dissolution. It is content (mass%) of silicon, magnesium, calcium, and aluminum.
- the fixed form is made of inorganic fibers, excluding indeterminate forms such as plaster (which may include inorganic and / or organic binders), such as mold, blanket, block, board, paper, felt, etc. It is done.
- the fixed form which consists of an inorganic fiber of this invention does not contain the zonotolite type
- the shaped product can contain an organic binder, an inorganic binder, an inorganic filler and the like in addition to the inorganic fiber. As long as the effects of the present invention are not impaired, those usually used can be used. Starch, acrylic resin, polyacrylamide, pulp, acrylic emulsion and the like are used as the organic binder, and anionic colloidal silica is used as the inorganic binder. And colloidal silica such as cationic colloidal silica, alumina sol, bentonite, clay mineral and the like.
- the curing agent is impregnated from the surface.
- biosoluble fiber A colloidal silica, alumina sol, bentonite (inorganic binder), inorganic powder (silica, zircon, calcium carbonate, zirconia, cordierite, wollastonite, etc.), acrylamide (organic binder)
- An inorganic board having a length of 300 mm, a width of 300 mm, and a thickness of 50 mm (density 250 kg / m 3 ) was produced.
- Example 1 ⁇ Curing treatment> The organic board and inorganic board (density 250 kg / m 3 ) obtained in Production Example 1 were treated (immersion for 1 to 10 seconds) with a curing solution (pH about 9, solvent: water) made of alkali-type colloidal silica, and the surface Was cured and dried. The density was 300 kg / m 3 . Strength improved after curing. A photograph of the surface of the inorganic board before and after curing is shown in FIG. Furthermore, the hardness of the cured organic and inorganic boards was measured using a hardness meter (manufactured by ASKER: Asker rubber hardness meter C type). The results are shown in Table 1.
- ASKER Asker rubber hardness meter C type
- Comparative Example 1 The organic and inorganic boards obtained in Production Example 1 were evaluated without being cured. Both organic and inorganic boards were brittle. Hardness was measured in the same manner as in Example 1. The results are shown in Table 1.
- Example 2 ⁇ Curing treatment> Hardness was measured in the same manner as in Example 1 except that the organic board and inorganic board obtained in Production Example 2 were used. The results are shown in Table 2.
- Comparative Example 2 The organic and inorganic boards obtained in Production Example 2 were evaluated without being cured. Both organic and inorganic boards were brittle. Hardness was measured in the same manner as in Example 1. The results are shown in Table 2.
- Example 3 [Chelating agent and curing agent] ⁇ Curing treatment>
- the organic and inorganic boards obtained in Production Example 1 were treated with a curing treatment solution (pH about 9, solvent: water) composed of EDTA diammonium salt and alkali type colloidal silica to cure and dry the surface.
- the chelating agent was used at 1% by weight with respect to a solid content 10% by weight curing treatment liquid.
- Example 4 [Acid and curing agent] ⁇ Curing treatment>
- the organic and inorganic boards obtained in Production Example 1 were treated with a curing treatment liquid composed of an acid and alkali type colloidal silica (curing agent) to cure and dry the surface.
- acids citric acid, malic acid, tartaric acid, and salicylic acid were used in an amount of about 1% by weight based on a 10% solid content curing treatment liquid, and the pH of the treatment liquid was adjusted to 3-4.
- Example 5 [Acid and curing agent] ⁇ Curing treatment> The organic and inorganic boards obtained in Production Example 1 were treated with a curing treatment liquid composed of citric acid and alkali type colloidal silica (curing agent) to cure and dry the surface. Citric acid was used at 0.4 wt%, 0.6 wt%, 1.5 wt% and 8 wt%, and the pH of the treatment solution was adjusted to 2-5. ⁇ Heating test> The same operation as in Example 3 was performed. The results are shown in Table 6.
- Example 6 [Acid and curing agent] ⁇ Curing treatment> The same procedure as in Example 4 was performed except that the organic board and inorganic board obtained in Production Example 2 were used. ⁇ Heating test> The same operation as in Example 4 was performed. For comparison, the cured organic and inorganic boards obtained in Example 2 were similarly heated and observed. The results are shown in Tables 7 and 8.
- Example 7 [Acid type colloidal silica and cationic type colloidal silica] ⁇ Curing treatment> The organic board and inorganic board obtained in Production Example 1 were mixed with acidic type colloidal silica (silica doll 20A (manufactured by Nippon Chemical Industry Co., Ltd.), pH 2-4) or cationic type colloidal silica (Snowtex AK, Nissan Chemical Industries, Ltd.). ) Product) (curing agent) to cure and dry the surface. ⁇ Heating test> The same operation as in Example 3 was performed. The results are shown in Tables 9 and 10.
- Example 8 [Acid type colloidal silica and cationic type colloidal silica] ⁇ Curing treatment> The same operation as in Example 7 was performed except that the organic board and the inorganic board obtained in Production Example 2 were used. ⁇ Heating test> The same operation as in Example 7 was performed. The results are shown in Tables 11 and 12.
- the cured product of the present invention can be used in various applications as a general high-temperature heat insulating material, a furnace furnace ceiling, a furnace wall heat insulating material lining material, a heat insulating material, and a backup material.
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Abstract
Description
しかしながら、生体溶解性繊維を用いて製造された定形物は、絶対的な強度が低いという欠点があった。
本発明によれば、以下の硬化定形物及びその硬化方法が提供される。
1.SiO2、アルカリ土類金属を含む生体溶解性無機繊維20~99重量%からなる定形物であって、コロイダルシリカである硬化剤が前記定形物の表面から浸み込み、表面が硬化されている定形物。
2.前記硬化剤と共に、金属イオンを含まないキレート剤が浸み込んでいる1記載の定形物。
3.前記キレート剤が、EDTA・H・3(NH4)又はEDTA・2H・2(NH4)である2記載の定形物。
4.前記硬化剤と共に、酸が浸み込んでいる1記載の定形物。
5.前記酸が、ヒドロキシ酸である4記載の定形物。
6.前記酸が、クエン酸、りんご酸、酒石酸、サリチル酸から選択される1種以上である4記載の定形物。
7.前記硬化剤が、酸性タイプコロイダルシリカ又はカチオンタイプコロイダルシリカである1記載の定形物。
8.前記酸性タイプコロイダルシリカのpHが2~5である7記載の定形物。
9.前記無機繊維が、以下の組成である1~8のいずれか記載の定形物。
SiO2とZrO2とAl2O3とTiO2との合計 50~82重量%
アルカリ金属酸化物とアルカリ土類金属酸化物との合計 18~50重量%
10.前記無機繊維が、以下の組成である1~8のいずれか記載の定形物。
SiO2 50~82重量%
CaOとMgOとの合計 10~43重量%
11.前記無機繊維が、以下の組成を有するMgシリケート繊維、又は以下の組成を有するCaシリケート繊維である1~8のいずれか記載の定形物。
[Mgシリケート繊維]
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 3重量%以下
他の酸化物 2重量%未満
[Caシリケート繊維]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 5重量%以下
他の酸化物 2重量%未満
12.SiO2、アルカリ土類金属を含む生体溶解性無機繊維20~99重量%からなる定形物に、コロイダルシリカを含む硬化処理液を浸み込まして、乾燥する定形物の硬化方法。
13.前記硬化処理液が、さらに、金属イオンを含まないキレート剤又は酸を含む12記載の定形物の硬化方法。
14.12又は13記載の硬化方法により硬化された定形物。
本発明によれば、無機繊維からなる強度の高い定形物を提供することができる。
SiO2とZrO2とAl2O3とTiO2の合計 50重量%~82重量%
アルカリ金属酸化物とアルカリ土類金属酸化物との合計 18重量%~50重量%
SiO2 50~82重量%
CaOとMgOとの合計 10~43重量%
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 3重量%以下
他の酸化物 2重量%未満
SiO2 66~82重量%(例えば、68~80重量%、70~80重量%、71~80重量%又は71~76重量%とできる)
CaO 10~34重量%(例えば、18~32重量%、20~30重量%、20~27重量%又は21~26重量%とできる)
MgO 3重量%以下(例えば、1重量%以下とできる)
Al2O3 5重量%以下(例えば3.5重量%以下、3.4重量%以下又は3重量%以下とできる。また、1重量%以上、1.1重量%以上又は2重量%以上とできる)
他の酸化物 2重量%未満
生理食塩水溶解率は、例えば、次のようにして測定される。すなわち、先ず、無機繊維を200メッシュ以下に粉砕して調製された試料1g及び生理食塩水150mLを三角フラスコ(容積300mL)に入れ、40℃のインキュベーターに設置する。次に、三角フラスコに、毎分120回転の水平振動を50時間継続して加える。その後、ろ過により得られた濾液に含有されている各元素の濃度(mg/L)をICP発光分析装置により測定する。そして、測定された各元素の濃度と、溶解前の無機繊維における各元素の含有量(質量%)と、に基づいて、生理食塩水溶解率(%)を算出する。すなわち、例えば、測定元素が、ケイ素(Si)、マグネシウム(Mg)、カルシウム(Ca)及びアルミニウム(Al)である場合には、次の式により、生理食塩水溶解率C(%)を算出する;C(%)=[ろ液量(L)×(a1+a2+a3+a4)×100]/[溶解前の無機繊維の質量(mg)×(b1+b2+b3+b4)/100]。この式において、a1、a2、a3及びa4は、それぞれ測定されたケイ素、マグネシウム、カルシウム及びアルミニウムの濃度(mg/L)であり、b1、b2、b3及びb4は、それぞれ溶解前の無機繊維におけるケイ素、マグネシウム、カルシウム及びアルミニウムの含有量(質量%)である。
<有機及び無機ボード(定形物)の製造>
生体溶解性繊維A(SiO2含有量が73質量%、CaO含有量が25質量%、MgO含有量が0.3質量%、Al2O3含有量が2質量%)90重量%と、澱粉とポリアクリルアミド(有機バインダー)、コロイダルシリカ(無機バインダー)から、縦300mm、横300mm、厚み50mm(密度250kg/m3)の有機ボードを製造した。
さらに、生体溶解性繊維A85重量%と、コロイダルシリカとアルミナゾルとベントナイト(無機バインダー)、無機粉体(シリカ、ジルコン、炭酸カルシウム、ジルコニア、コージライト、ワラストナイト等)、アクリルアミド(有機バインダー)から、縦300mm、横300mm、厚み50mm(密度250kg/m3)の無機ボードを製造した。
<有機及び無機ボード(定形物)の製造>
生体溶解性繊維Aの代わりに、生体溶解性繊維B(SiO2含有量が76質量%、CaO含有量が4質量%、MgO含有量が18質量%、Al2O3含有量が2質量%)を用いた他は、製造例1と同様にして、有機及び無機ボードを製造した。
<硬化処理>
製造例1で得た有機ボード及び無機ボード(密度250kg/m3)を、アルカリタイプコロイダルシリカからなる硬化液(pH約9、溶剤:水)で処理(1~10秒浸漬)して、表面を硬化し乾燥した。密度は300kg/m3であった。硬化後は強度が向上した。硬化前後の無機ボードの表面の写真を図1に示す。さらに、硬化した有機及び無機ボードの硬度を硬度計(ASKER製:アスカーゴム硬度計C型)を用いて測定した。結果を表1に示す。
製造例1で得た有機及び無機ボードを硬化処理すること無く評価した。有機及び無機ボードは共に脆かった。実施例1と同様に硬度を測定した。結果を表1に示す。
<硬化処理>
製造例2で得た有機ボード及び無機ボードを用いた他は、実施例1と同様に硬化し硬度を測定した。結果を表2に示す。
製造例2で得た有機及び無機ボードを硬化処理すること無く評価した。有機及び無機ボードは共に脆かった。実施例1と同様に硬度を測定した。結果を表2に示す。
[キレート剤と硬化剤]
<硬化処理>
製造例1で得た有機及び無機ボードを、EDTA2アンモニウム塩とアルカリタイプコロイダルシリカからなる硬化処理液(pH約9、溶媒:水)で処理して、表面を硬化し乾燥した。キレート剤は、固形分10重量%硬化処理液に対し1重量%で用いた。
硬化した有機及び無機ボードを、800℃、900℃、1000℃、1100℃で24時間加熱して、外観(クラックの有無)を目視で観察した。比較のため実施例1で得た硬化した有機及び無機ボードも同様に加熱して観察した。正常なものを◎、表面に小さなクラックが発生したものを○、大きなクラックが発生したものを▲、割れが発生したものを×とした。結果を表3に示す。
[酸と硬化剤]
<硬化処理>
製造例1で得た有機及び無機ボードを、酸と、アルカリタイプコロイダルシリカ(硬化剤)からなる硬化処理液で処理して、表面を硬化し乾燥した。酸として、クエン酸、りんご酸、酒石酸、サリチル酸を、固形分10重量%硬化処理液に対し約1重量%で用い、処理液のpHを3~4とした。
実施例3と同様に実施した。結果を表4,5に示す。
[酸と硬化剤]
<硬化処理>
製造例1で得た有機及び無機ボードを、クエン酸と、アルカリタイプコロイダルシリカ(硬化剤)からなる硬化処理液で処理して、表面を硬化し乾燥した。クエン酸を、0.4重量%、0.6重量%、1.5重量%、8重量%で用い、処理液のpHを2~5とした。
<加熱試験>
実施例3と同様に実施した。結果を表6に示す。
[酸と硬化剤]
<硬化処理>
製造例2で得た有機ボード及び無機ボードを用いた他は、実施例4と同様に実施した。
<加熱試験>
実施例4と同様に実施した。比較のため実施例2で得た硬化した有機及び無機ボードも同様に加熱して観察した。結果を表7,8に示す。
[酸性タイプコロイダルシリカとカチオンタイプコロイダルシリカ]
<硬化処理>
製造例1で得た有機ボード及び無機ボードを、酸性タイプコロイダルシリカ(シリカドール20A(日本化学工業(株)製)、pH2~4)又はカチオンタイプコロイダルシリカ(スノーテックスAK、日産化学工業(株)製)(硬化剤)で処理して、表面を硬化し乾燥した。
<加熱試験>
実施例3と同様に実施した。結果を表9,10に示す。
[酸性タイプコロイダルシリカとカチオンタイプコロイダルシリカ]
<硬化処理>
製造例2で得た有機ボード及び無機ボードを用いた他は、実施例7と同様に実施した。
<加熱試験>
実施例7と同様に実施した。結果を表11,12に示す。
上記に本発明の実施形態及び/又は実施例を幾つか詳細に説明したが、当業者は、本発明の新規な教示及び効果から実質的に離れることなく、これら例示である実施形態及び/又は実施例に多くの変更を加えることが容易である。従って、これらの多くの変更は本発明の範囲に含まれる。
この明細書に記載の文献の内容を全てここに援用する。
Claims (14)
- SiO2、アルカリ土類金属を含む生体溶解性無機繊維20~99重量%からなる定形物であって、コロイダルシリカである硬化剤が前記定形物の表面から浸み込み、表面が硬化されている定形物。
- 前記硬化剤と共に、金属イオンを含まないキレート剤が浸み込んでいる請求項1記載の定形物。
- 前記キレート剤が、EDTA・H・3(NH4)又はEDTA・2H・2(NH4)である請求項2記載の定形物。
- 前記硬化剤と共に、酸が浸み込んでいる請求項1記載の定形物。
- 前記酸が、ヒドロキシ酸である請求項4記載の定形物。
- 前記酸が、クエン酸、りんご酸、酒石酸、サリチル酸から選択される1種以上である請求項4記載の定形物。
- 前記硬化剤が、酸性タイプコロイダルシリカ又はカチオンタイプコロイダルシリカである請求項1記載の定形物。
- 前記酸性タイプコロイダルシリカのpHが2~5である請求項7記載の定形物。
- 前記無機繊維が、以下の組成である請求項1~8のいずれか記載の定形物。
SiO2とZrO2とAl2O3とTiO2との合計 50~82重量%
アルカリ金属酸化物とアルカリ土類金属酸化物との合計 18~50重量% - 前記無機繊維が、以下の組成である請求項1~8のいずれか記載の定形物。
SiO2 50~82重量%
CaOとMgOとの合計 10~43重量% - 前記無機繊維が、以下の組成を有するMgシリケート繊維、又は以下の組成を有するCaシリケート繊維である請求項1~8のいずれか記載の定形物。
[Mgシリケート繊維]
SiO2 66~82重量%
CaO 1~9重量%
MgO 10~30重量%
Al2O3 3重量%以下
他の酸化物 2重量%未満
[Caシリケート繊維]
SiO2 66~82重量%
CaO 10~34重量%
MgO 3重量%以下
Al2O3 5重量%以下
他の酸化物 2重量%未満 - SiO2、アルカリ土類金属を含む生体溶解性無機繊維20~99重量%からなる定形物に、コロイダルシリカを含む硬化処理液を浸み込まして、乾燥する定形物の硬化方法。
- 前記硬化処理液が、さらに、金属イオンを含まないキレート剤又は酸を含む請求項12記載の定形物の硬化方法。
- 請求項12又は13記載の硬化方法により硬化された定形物。
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JP2016017011A (ja) * | 2014-07-08 | 2016-02-01 | ニチアス株式会社 | 生体溶解性無機繊維 |
US9944552B2 (en) | 2013-07-22 | 2018-04-17 | Morgan Advanced Materials Plc | Inorganic fibre compositions |
DE112017004988T5 (de) | 2016-09-30 | 2019-09-05 | Morgan Advanced Materials Plc. | Anorganische Faserzusammensetzungen |
US10894737B2 (en) | 2016-01-15 | 2021-01-19 | Thermal Ceramics Uk Limited | Apparatus and method for forming melt-formed inorganic fibres |
WO2022084655A1 (en) | 2020-10-23 | 2022-04-28 | Thermal Ceramics Uk Limited | Thermal insulation |
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JP4975179B2 (ja) * | 2010-10-14 | 2012-07-11 | ニチアス株式会社 | 無機繊維質成形体及びその製造方法並びに加熱設備 |
JP5022512B1 (ja) * | 2011-12-01 | 2012-09-12 | ニチアス株式会社 | 不定形組成物 |
CN109680545B (zh) * | 2018-12-28 | 2021-04-20 | 江苏理文造纸有限公司 | 一种用于挂面箱板纸的干强剂的制备方法 |
WO2024092084A1 (en) * | 2022-10-26 | 2024-05-02 | Unifrax I Llc | Fiber-based bed grading material |
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CN103459353A (zh) | 2013-12-18 |
CN103459353B (zh) | 2016-02-24 |
JP4937414B1 (ja) | 2012-05-23 |
US20120248367A1 (en) | 2012-10-04 |
EP2692712B1 (en) | 2019-08-07 |
AU2012235264B2 (en) | 2015-05-07 |
EP2692712A1 (en) | 2014-02-05 |
KR101390509B1 (ko) | 2014-04-30 |
KR20130131447A (ko) | 2013-12-03 |
AU2012235264A1 (en) | 2013-06-13 |
JP2012207342A (ja) | 2012-10-25 |
EP2692712A4 (en) | 2014-10-29 |
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