JP2008019395A - Organic/inorganic hybrid glassy substance and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transparent material that has a very low softening point, causes a small change of the Abbe number with the temperature enough to be suitable for optical applications within the ordinary temperature range and has a high visible light transmittance. <P>SOLUTION: The organic/inorganic hybrid glassy substance has an Abbe number suffering from no changes exceeding 1.5 within the temperature range of 20-150°C (the difference between the maximum value and the minimum value is not more than 1.5) and having a standard deviation of at most 0.5 within the temperature range of 20-150°C, and has an average transmittance of at least 85% within the wavelength range of 300-800 nm. The substance is characterized also by a softening point of 50-350°C and meltability. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an organic-inorganic hybrid glassy material starting from a raw material used in the sol-gel method and a method for producing the same.

  As materials that soften at 600 ° C. or lower, polymer materials and low-melting glass are well known, and have been used in many places such as sealing and sealing materials, passivation glasses, glazes, and the like. Polymer materials and low-melting glass have different physical properties, so they have been used properly according to the environment in which they can be used. In general, glass is used when heat resistance and hermetic performance are prioritized, and organic materials represented by polymer materials are used in fields where properties other than heat resistance and hermetic performance are prioritized. However, along with recent technological progress, attention has been paid to properties that have not been required so far, and development of materials having such properties is expected.

For this reason, the development of polymer materials with increased heat resistance and airtight performance and so-called low-melting glass, which is a glass with a softened region lowered in temperature, has been actively carried out. Especially in the electronic materials market where heat resistance and airtightness are required, low melting point glass such as PbO-SiO ₂ -B ₂ O ₃ or PbO-P ₂ O ₅ -SnF ₂ It is an indispensable material in fields such as sealing and coating. In addition, the low melting point glass can reduce the energy required for the molding process and the cost compared to the high temperature molten glass, and therefore, it meets the recent social demand for energy saving. Furthermore, if it is possible to melt an organic substance having an optical function at a temperature that does not destroy it, application to an optical information communication device such as an optical switch is expected as a host of the optical functional organic substance-containing (nonlinear) optical material. As described above, materials having heat resistance and airtightness, which are the characteristics of general molten glass, and easily obtaining various properties such as polymer materials are demanded in many fields. Expectations are gathered. Furthermore, organic-inorganic hybrid glass is also attracting attention as one of low-melting glass.

  As the low melting point glass, for example, Tick glass represented by Sn-Pb-PFO glass (for example, see Non-Patent Document 1) is famous, and has a glass transition point around 100 ° C., and is excellent. It has been used in some markets due to its water resistance. However, since this low melting point glass contains lead as a main component, it is necessary to replace it with an alternative material from the recent trend of environmental protection. Furthermore, the required characteristics for Tick glass have changed greatly, and at the same time the demands have diversified.

  As a general glass production method, a melting method and a low-temperature synthesis method are known. The melting method is a method in which a glass raw material is directly heated to be melted and vitrified. Many glasses are produced by this method, and low-melting glass is also produced by this method. However, in the case of a low-melting glass, there are many restrictions on the glass composition that can be constructed, such as the need to contain lead, alkali, bismuth, etc. in order to lower the melting point.

  On the other hand, as a low-temperature synthesis method of amorphous bulk, a sol-gel method, a liquid phase reaction method, and an acid anhydride base reaction method are considered. In the sol-gel method, a bulk body can be obtained by hydrolysis-polycondensation of metal alkoxide and the like, and heat treatment at a temperature exceeding 500 ° C. (for example, see Non-Patent Document 2), usually 700 to 1600 ° C. However, when the bulk material produced by the sol-gel method is viewed as a practical material, it is porous due to the decomposition and combustion of organic substances such as alcohol introduced during the preparation of the raw material solution, or evaporative emission during the heating process of the decomposition gas or water of organic substances. In many cases, there were problems in heat resistance and airtightness. As described above, many problems still remain in bulk production by the sol-gel method, and in particular, low-melting glass has not been produced by the sol-gel method.

  In addition, the liquid phase reaction method has a low yield, resulting in low productivity, the use of hydrofluoric acid in the reaction system and the limited synthesis of thin films. It is almost impossible to synthesize.

  The anhydride-base reaction method is a technique developed in recent years, and it is possible to produce an organic-inorganic hybrid glass that is one of low-melting glasses (for example, see Non-Patent Document 3), but it is still under development. Not all low-melting glasses can be made.

  Therefore, many low-melting-point glasses have been manufactured not by a low-temperature synthesis method but by a melting method. For this reason, the glass composition is limited for the convenience of melting the glass raw material, and the kind of the low melting glass that can be produced is extremely limited.

  At present, low-melting glass is a promising material due to heat resistance and airtightness, and required physical properties are often obtained in a form typified by low-melting glass. However, the material is not particular about the low melting point glass, and if the required physical properties match, there is no major problem with a low melting point or low softening point substance other than glass.

  That is, there has been no material that has a softening point lower than that of the current low-melting glass, does not contain lead, has chemical durability, and is transparent.

From a known technique, a method for producing quartz glass fibers by the sol-gel method (for example, see Patent Document 1), a method for producing titanium oxide fibers by the sol-gel method (for example, see Patent Document 2), and further a semiconductor by the sol-gel method. A method for manufacturing a dope matrix (see, for example, Patent Document 3) is known. In addition, a P ₂ O ₅ —TeO ₂ —ZnF ₂ -based low-melting glass by a melting method is known (for example, see Patent Document 4).
JP-A-62-297236 JP-A-62-223323 Japanese Unexamined Patent Publication No. 1-183438 Japanese Patent Laid-Open No. 7-126035 PATick, Physics and Chemistry of Glasses, vol.25 No.6, pp.149-154 (1984). Kamiya, K., Sakuhana, K., Tashiro, No., Journal of Ceramic Association, pp.614-618, 84 (1976). Masahide Takahashi, Haruki Niida, Toshinobu Yokoo, New Glass, pp.8-13, 17 (2002).

  Many low softening point materials, particularly low melting glass, have been manufactured by melting methods. For this reason, the glass composition has many restrictions, and the low melting glass which can be produced was very limited on account of melting a glass raw material.

  On the other hand, when manufactured by the low temperature synthesis sol-gel method, a processing temperature of 500 ° C. or higher is required for densification, but if it is processed at that temperature, it does not become a low melting point glass, resulting in heat resistance and airtight performance. No good low melting point glass could be obtained. In particular, in the field of electronic materials, a low-melting-point glass or a low-melting-point material other than glass corresponding to severe heat resistance, hermetic performance, UV resistance and low melting point has not been found so far.

  The methods disclosed in JP-A-62-297236, JP-A-62-223323, and JP-A-1-183438 made it possible to produce materials even at low temperatures, which could only be handled by high-temperature melting. However, low melting glass cannot be manufactured. Further, after sol-gel treatment, treatment at 500 ° C. or higher is also necessary. On the other hand, the method disclosed in Japanese Patent Application Laid-Open No. 7-126035 discloses that a glass having a transition point of 3 and several tens of degrees Celsius can be produced. However, there has been no example of manufacturing a glass having a transition point lower than that without a low melting point material such as lead or bismuth.

  That is, in the conventional low melting point glass manufacturing methods, the softening temperature is 350 ° C. or less, the optical characteristics, particularly the Abbe number is stable with respect to the temperature change, and also high transparency in the ultraviolet-visible range. I couldn't make glass. In addition, no material other than glass satisfies such characteristics. Furthermore, the softening temperature is 350 ° C. or less, particularly 100 ° C. or less, and the Abbe number does not change by 1.5 or more in the temperature range of 20 to 150 ° C. (the difference between the maximum value and the minimum value is within 1.5), 20 There has never been a glass with an average transmittance of 85% or more in the wavelength range of 300 to 800 nm, in which the standard deviation of the Abbe number in the temperature range of ˜150 ° C. is 0.5 or less, and it is easy to manufacture. I couldn't.

  The present invention is an organic-inorganic hybrid glassy material characterized in that the Abbe number does not change by 1.5 or more in a temperature range of 20 to 150 ° C. (the difference between the maximum value and the minimum value is within 1.5).

  The organic-inorganic hybrid glassy material is characterized in that the standard deviation of the Abbe number in the temperature range of 20 to 150 ° C. is 0.5 or less.

  Furthermore, it is said organic-inorganic hybrid glassy substance whose average transmittance | permeability in a 300-380 nm wavelength range is 85% or more.

  Furthermore, the organic-inorganic hybrid glassy material having a softening temperature of 50 ° C. to 350 ° C. and having meltability.

  Furthermore, the organic-inorganic hybrid glassy material described above having an irregular network structure in part or all of the glassy material.

  Furthermore, it is said organic-inorganic hybrid glassy substance containing a phenyl group.

  According to the present invention, an organic-inorganic hybrid glassy material having a low melting point, which has been considered extremely difficult to produce so far, has a very low softening temperature, has a low Abbe number depending on the temperature, and can be used particularly in optical applications. Can do.

  In the organic-inorganic hybrid glassy material of the present invention, the Abbe number does not change by 1.5 or more in the temperature range of 20 to 150 ° C. (the difference between the maximum value and the minimum value is within 1.5). This is because when the Abbe number changes by 0.5 or more due to temperature change, the aberration cannot be corrected and cannot be used as an optical material.

  The organic-inorganic hybrid glassy material of the present invention has an Abbe number standard deviation of 0.5 or less in a temperature range of 20 to 150 ° C. This is because if the standard deviation of the Abbe number is 0.5 or more, the aberration cannot be corrected and cannot be used as an optical material.

  Moreover, the average transmittance | permeability in a 300-800 nm wavelength range is 85% or more. When the average transmittance in the wavelength region of 300 to 800 nm, particularly 300 to 380 nm is 85% or less, the organic group is decomposed by the energy of the absorbed ultraviolet light or the thermal energy generated thereby, and the transmission loss in the visible light region is increased. And coloring occurs. In order to use as an optical component for ultraviolet-visible light, the average transmittance in the wavelength region of 300 to 800 nm is preferably 85% or more.

  Further, it is preferably an organic-inorganic hybrid glassy material having a softening temperature of 50 ° C. to 350 ° C. and having meltability. When the softening temperature is less than 50 ° C., there is a problem in the chemical stability, and when it exceeds 350 ° C., there is a problem in workability. Although the softening temperature tends to change depending on the treatment, the final softening temperature is preferably 100 to 300 ° C, more preferably 120 to 280 ° C. At the same time, it is necessary to have meltability. This is because if this meltability is not present, there are many cases where problems occur in the adhesiveness. In addition, the softening temperature of the organic-inorganic hybrid glassy substance was judged from TMA measurement which was heated at 10 ° C./min. That is, the shrinkage was measured under the above conditions, and the change start temperature of the shrinkage was defined as the softening temperature.

  In the case of producing an organic-inorganic hybrid glassy substance, it is desirable to produce it by concentrating and melting the raw material having meltability and then subjecting it to a reduced pressure heat treatment followed by high-temperature heat treatment at 300 ° C. or higher. The raw material before heat treatment needs to be meltable. Here, the meltability literally refers to the property of melting, that is, the property of greatly reducing the viscosity by heating and becoming a so-called molten state. This is because without this meltability, neither softening nor melting is possible. In addition, it is preferable to perform the high temperature heat treatment performed after melting and heating under reduced pressure of the raw material at a temperature of 300 ° C. or higher. The main purpose is melting to make the raw material uniform, the heating under reduced pressure to slowly change the structure of the whole raw material, and the subsequent high-temperature heat treatment to change specific bonds. The reason why the high-temperature heat treatment temperature is set to 300 ° C. or more is that if the high-temperature heat treatment temperature is 300 ° C. or less, a great amount of time is required, and industrial advantages such as productivity are small. When the high temperature heat treatment temperature is 300 ° C. or higher and 400 ° C. or lower, it is preferable to perform heat treatment for 30 minutes or longer and 3 hours or shorter. Further, when the high temperature heat treatment temperature is 400 ° C. or higher and 550 ° C. or lower, it is preferable to perform the heat treatment for 30 minutes or shorter.

Moreover, it is preferable that the raw material which has a meltability contains the phenyl group. A metal unit having an organic functional group R in the structure of an organic-inorganic hybrid glassy substance, for example, a silicon unit represented by (R _n SiO _{(4-n) / 2} ) (selected from n = 1, 2, 3) It is important to mix. The silicon unit includes a phenyl group metal unit (Ph _n SiO _{(4-n) / 2} ), a methyl group metal unit (Me _n SiO _{(4-n) / 2} ), and an ethyl group metal unit (Et _n SiO _{( 4-n) / 2} ), butyl group metal units (Bt _n SiO _{(4-n) / 2} ) (n = 1 to 3) and the like are typical, but phenyl group metal units are most effective. Because.

  Moreover, it is preferable that the raw material which has a meltability contains D unit. The D unit is a unit in which all or one of the four bonds of silicon atoms, excluding the bond to the organic substituent, is bonded to the silicon atom via an oxygen atom, and the total silicon unit in molar ratio. It is desirable to contain 15% or more and 50% or less. If it is 15% or less, the viscosity at the time of melting is too high, and if it is 50% or more, the strength at room temperature becomes insufficient. More desirably, the content is 20% or more and 45% or less.

  The high temperature heat treatment is preferably performed at 300 ° C. or higher and 550 ° C. or lower. Heat treatment at temperatures below 300 ° C. requires an extremely long time, so that almost no industrial merit is recognized. On the other hand, when the temperature exceeds 550 ° C., the reaction proceeds too quickly, and its control becomes difficult and coloring problems occur. Because there are things. More preferably, it is 400 degreeC or more and 525 degrees C or less, More preferably, it is 450 degreeC or more and 500 degrees C or less. In addition, since the heat treatment needs to be performed for a time that does not cause the organic functional group to decompose, for example, when the heat treatment is performed at 400 ° C. or higher and 550 ° C. or lower, the heat treatment time is preferably within 30 minutes. This is because when the heat treatment for more than 30 minutes is performed, the organic functional group may be decomposed and a good glassy substance cannot be obtained. More preferably, it is within 20 minutes, more preferably within 10 minutes. For example, when heat treatment is performed at 300 ° C. or more and 400 ° C. or less, the heat treatment time is preferably within 3 hours. Although these conditions vary depending on the required specification of light transmittance, the type of the organic functional group, and the conditions where coloring is allowed, the above-mentioned conditions are generally the above.

  In addition, as a method of manufacturing a raw material, it is preferable to manufacture as follows. That is, the starting material is a metal alkoxide, and a raw material produced through a concentration step, a melting step, a reduced pressure heating step, and a high temperature heat treatment step after a mixing step using the metal alkoxide as a raw material and water, an acid catalyst and an alcohol is preferable. . According to this method, the stability is also high, and it can be manufactured at low cost while maintaining good quality. Here, what is important is that it is meltable and cannot be produced by a conventional sol-gel method having no meltability.

  The upper limit temperature of the concentration step is 100 ° C. or lower when an alcohol having a boiling point exceeding 100 ° C., for example, 1-butanol having a boiling point of 118 ° C. is used, but it is desirable to consider the boiling point of alcohol having a boiling point of 100 ° C. or lower. For example, when ethanol is used, the boiling point tends to be better at 80 ° C. or lower. This is presumably because when the boiling point is exceeded, the alcohol rapidly evaporates, so that it is difficult to achieve a uniform reaction from the amount of alcohol and changes in state.

  The melting step is preferably performed at a temperature of 30 ° C to 400 ° C. At temperatures lower than 30 ° C., it cannot be melted substantially. Further, when the temperature exceeds 400 ° C., the organic group bonded to the metal element forming the network burns, so that a desired organic-inorganic hybrid glassy material cannot be obtained. Or Desirably, it is 100 degreeC or more and 300 degrees C or less.

  In the reduced-pressure heating step, it is preferable to perform the treatment at a temperature of 250 ° C. or higher and 300 ° C. or lower and a pressure of 0.1 Torr or lower. At a temperature lower than 250 ° C., the reaction cannot be promoted sufficiently. If it exceeds 300 ° C., it may be thermally decomposed, making it difficult to obtain a stable glassy substance. If the pressure at this time exceeds 0.1 Torr, the problem of remaining bubbles occurs. Further, the time required for heating under reduced pressure is 5 minutes or more. The heating time under reduced pressure varies depending on the processing amount, the processing temperature, and the allowable residual amount of the reactive hydroxyl group (—OH), but generally it is extremely difficult to reach a satisfactory level in less than 5 minutes. Moreover, since productivity falls in a long time, it is 10 minutes or more and less than 1 week desirably.

  A stabilized organic-inorganic hybrid glassy substance can be obtained through the melting step and the reduced pressure heating step. In the conventional sol-gel method, neither the above-described melting step nor the reduced pressure heating step is performed, and thus the organic-inorganic hybrid glassy material of the present invention cannot be obtained.

  Note that in the melting step and the heating step under reduced pressure, heating is performed under an inert atmosphere, or microwave heating is also effective.

  In the conventional sol-gel method, hydrochloric acid and nitric acid are often used as catalysts. This is because the gelation time becomes longer with other catalysts, but nitric acid and other acids are not preferred in the mixing step of the present invention, and hydrochloric acid or acetic acid is preferably used. More preferred is acetic acid. Trifluoroacetic acid is also useful.

  The metal alkoxide used as a raw material is an alkoxysilane substituted with an organic substituent. The organic substituent is a phenyl group, a methyl group, an ethyl group, a propyl group (n-, i-), a butyl group (n-, i-, t-), pentyl group, hexyl group, octyl group, decyl group, dodecyl group, octadecyl group, mercaptomethyl group, mercaptopropyl group, 3,3,3-trifluoropropyl group, 3-trifluoroacetoxypropyl group, vinyl It is preferably selected from metal alkoxides consisting of methoxy, ethoxy, propoxy (n-, i-), etc. as alkoxyl groups from the group, benzyl group, styryl group and the like. These are extremely useful raw materials for producing an organic-inorganic hybrid glassy material, particularly a transparent material having a low softness at room temperature or lower. Metal alkoxides other than those described above may be used. Further, metal acetylacetonate, metal carboxylate, metal nitrate, metal hydroxide, metal halide and the like used in the sol-gel method can be produced.

  Typical alcohols include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-methyl-1-propanol, 2-butanol, 1.1-dimethyl-1-ethanol and the like. However, it is not limited to these.

In the mixing step, it is also effective to use ammonia. At this time, the ammonia to be used is preferably 1 to 20 times that of hydrochloric acid or acetic acid in terms of molar ratio. Ammonia, hydrochloric acid, and acetic acid are all catalysts, and are a combination of ammonia and acetic acid or ammonia and hydrochloric acid. Ammonia alone does not give good results. If the ammonia used in the mixing step is less than 1 time the molar ratio of hydrochloric acid or acetic acid, the alkoxide is not completely hydrolyzed and a large amount of T ² (—OEt) remains in the glass, resulting in poor chemical stability. . On the other hand, when the ammonia used in the mixing step exceeds 20 times the molar ratio of hydrochloric acid or acetic acid, the hydrolysis-polycondensation reaction proceeds rapidly and a uniform reaction cannot be achieved. More preferably, it is in the range of 2 to 10 times.

  Further, in this case, it is preferable to remove the ammonium salt through a pulverization / washing step after the melting step. This is because the presence of an ammonium salt may not result in a stable organic-inorganic hybrid glassy material.

  Of course, all the organic-inorganic hybrid glassy materials produced by the above-mentioned method are targets, but some or all of them are organic-inorganic hybrid glassy materials having an irregular network structure.

  Hereinafter, description will be made based on examples.

Metal alkoxides phenyltriethoxysilane (PhSi (OEt) ₃ ) and diethoxydiphenylsilane (Ph ₂ Si (OEt) ₂ ) were used as starting materials. As a mixing step, 10 ml of phenyltriethoxysilane, 45 ml of water and 20 ml of ethanol are added with acetic acid as a catalyst at room temperature, and as a heating reaction step, stirring is performed at 60 ° C. for 1 hour, and then 3 ml of diethoxydiphenylsilane is added to further add 60 Stir at 0 ° C. for 2 hours. Thereafter, the mixture was melted at 150 ° C. for 5 hours, heated under reduced pressure at 250 ° C. for 1 hour, and then cooled to room temperature to obtain a transparent so-called raw material. Furthermore, this raw material was heat-treated at 400 ° C. for 5 minutes to obtain a transparent substance having a thickness of 1 mm.

The refractive index of the transparent material was measured at different wavelengths (473, 632.8, 1319, 1553 nm) by Model 2010 Prism Coupler (Metricon). Using the measured value of the refractive index, a refractive index-wavelength approximate curve was created from the Cauchy approximation. The Abbe number was calculated from the refractive indexes n _F , n _D , and n _C of 486, 589, and 656 nm on the approximate curve. Further, the Abbe number was similarly determined by changing the temperature of the transparent material to 20 to 150 ° C. The change in Abbe number of this transparent material at 20 to 150 ° C. is shown in FIG. The change in Abbe number due to temperature change was 1.3 (difference between the maximum value and the minimum value was 1.3), which was 1.5 or less.

  The standard deviation of the Abbe number at 20 to 150 ° C. was 0.4 and 0.5 or less.

  Moreover, when the average transmittance | permeability in the 300-800 nm wavelength range of this transparent substance was calculated | required by Hitachi U3500 type self-recording spectrophotometer, it was 89.3% and was 85% or more.

  The softening temperature of this transparent material was 124 ° C., which was lower than the decomposition temperature of the phenyl group of about 500 ° C.

  In addition, the softening temperature of the organic-inorganic hybrid glassy substance was judged from TMA measurement which was heated at 10 ° C./min. That is, the softening behavior was obtained from the shrinkage change under the above conditions, and the starting temperature was defined as the softening temperature.

  In addition, when the bonding state of the transparent material was measured with a magnetic resonance measuring apparatus CMX-400 type manufactured by JEOL, the concentration of the D unit did not change after the heat treatment at 400 ° C. Was confirmed to exist without disappearing. Further, considering that the irregular network structure has been confirmed, the transparent material obtained this time is a material having an organic-inorganic hybrid glass structure, that is, an organic-inorganic hybrid glassy material.

  Although it was set as the raw material substantially the same as Example 1, and the same process, high temperature heat processing was performed at 300 degreeC for 2 hours, and the transparent substance with a thickness of 1 mm was obtained.

  When the change of the Abbe number due to the temperature change of this transparent substance was determined in the same manner as in Example 1, it was 1.2 (difference between the maximum value and the minimum value was 1.2) and was 1.5 or less.

  The standard deviation of the Abbe number at 20 to 150 ° C. was 0.4 and 0.5 or less.

  Moreover, when the average transmittance | permeability in the 300-800 nm wavelength range of this transparent substance was calculated | required, it was 89.2% and was 85% or more.

  The softening temperature of this transparent material was 150 ° C., which was lower than the decomposition temperature of the phenyl group of about 500 ° C.

  In addition, when the bonding state of the transparent substance was measured with a magnetic resonance measuring apparatus CMX-400 type manufactured by JEOL, the concentration of the D unit did not change after the heat treatment at 300 ° C. Was confirmed to exist without disappearing. Further, considering that the irregular network structure has been confirmed, the transparent material obtained this time is a material having an organic-inorganic hybrid glass structure, that is, an organic-inorganic hybrid glassy material.

  Although it was set as the raw material substantially the same as Example 1, and the same process, the transparent substance with a thickness of 1 mm was obtained, without performing high temperature heat processing.

  When the change of the Abbe number due to the temperature change of this transparent substance was determined in the same manner as in Example 1, it was 1.3 (difference between the maximum value and the minimum value was 1.3) and was 1.5 or less.

  The standard deviation of the Abbe number at 20 to 150 ° C. was 0.4 and 0.5 or less.

  Moreover, when the average transmittance | permeability in the 300-800 nm wavelength range of this transparent substance was calculated | required, it was 89.0% and was 85% or more.

  The softening temperature of this transparent material was 156 ° C., which was lower than the decomposition temperature of the phenyl group of about 500 ° C.

  Further, when the bonding state of the transparent substance was measured by a magnetic resonance measuring apparatus CMX-400 type manufactured by JEOL, the concentration of the D unit did not change after heating at 250 ° C. under reduced pressure. It was confirmed that the unit existed without disappearing. Further, considering that the irregular network structure has been confirmed, the transparent material obtained this time is a material having an organic-inorganic hybrid glass structure, that is, an organic-inorganic hybrid glassy material.

(Comparative Example 1)
The Abbe number was determined in the same manner as in Example 1 using an acrylic resin plate having a thickness of 1 mm. The change in the Abbe number of the acrylic resin at 20 to 150 ° C. is shown in FIG. The change in Abbe number due to temperature change was 9.7 (the difference between the maximum value and the minimum value was 9.7), which was 1.5 or more.

  Moreover, the standard deviation of the Abbe number in 20-150 degreeC was 2.9, and was 0.5 or more.

  Moreover, when the average transmittance | permeability in the 300-800 nm wavelength range of an acrylic resin was calculated | required, it was 87.4% and was 85% or more.

(Comparative Example 2)
The Abbe number was determined in the same manner as in Example 1 using an epoxy resin plate having a thickness of 1 mm. The change in the Abbe number of the epoxy resin at 20 to 150 ° C. is shown in FIG. The change in Abbe number due to the temperature change was 3.5 (difference between the maximum value and the minimum value was 3.5), which was 1.5 or more.

  The standard deviation of the Abbe number at 20 to 150 ° C. was 1.0, which was 0.5 or more.

  Moreover, when the average transmittance | permeability in the 300-800 nm wavelength range of an epoxy resin was calculated | required, it was 75.7% and was 85% or less.

(Comparative Example 3)
A yellow foam was obtained using the same raw materials and the same steps as in Example 1 except that the high-temperature heat treatment was performed at 600 ° C. The Abbe number and transmittance of this yellow foam could not be measured.
Further, when the bonding state of the transparent substance was measured with a magnetic resonance measuring apparatus CMX-400 type manufactured by JEOL, the concentration of the D unit decreased after the heat treatment at 600 ° C. It was confirmed that the part disappeared.

  Materials for sealing and covering display components such as PDP, optical information communication device materials such as optical switches and optical couplers, optical equipment materials such as LED chips, optical functional (non-linear) optical materials, It can be used in fields where low-melting glass is used, such as adhesive materials, and fields where organic materials such as epoxy are used. Furthermore, it can be used as a substitute for glass or ceramics as an optical material in an environment where the temperature is likely to change.

Graph of temperature-Abbe number shown in Example 1 of the present invention Temperature-Abbe number graph shown in Comparative Example 1 of the present invention Graph of temperature-Abbe number shown in comparative example 2 of the present invention

Claims (6)

An organic-inorganic hybrid glassy material characterized in that the Abbe number does not change by 1.5 or more in a temperature range of 20 to 150 ° C. (the difference between the maximum value and the minimum value is within 1.5). The organic-inorganic hybrid glassy material according to claim 1, wherein the standard deviation of the Abbe number in the temperature range of 20 to 150 ° C is 0.5 or less. 3. The organic-inorganic hybrid glassy material according to claim 1, wherein an average transmittance in a wavelength region of 300 to 800 nm is 85% or more. The organic-inorganic hybrid glassy material according to any one of claims 1 to 3, which has a softening temperature of 50 ° C to 350 ° C and meltability. The organic-inorganic hybrid glassy material according to any one of claims 1 to 4, wherein a part or all of the glassy material has an irregular network structure. The organic-inorganic hybrid glassy material according to any one of claims 1 to 5, which contains a phenyl group.

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