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CN-121975182-A - Void layer, method for producing void layer, laminate, optical member, and optical device

CN121975182ACN 121975182 ACN121975182 ACN 121975182ACN-121975182-A

Abstract

The present disclosure provides a void layer having a low refractive index and excellent mechanical strength. The void layer (11) is a void layer formed by chemically bonding pulverized gel-like silicon compounds, wherein the gel-like silicon compounds are obtained by condensing or partially condensing silane compounds, the silane compounds contain 1-3 functional silane compounds and 4 functional silane compounds, and the refractive index of the void layer (11) is 1.30 or less.

Inventors

  • SATOH KEISUKE
  • HATTORI DAISUKE

Assignees

  • 日东电工株式会社

Dates

Publication Date
20260505
Application Date
20240513
Priority Date
20230629

Claims (12)

  1. 1. A microporous particle-containing liquid comprising a dispersion medium and microporous particles, The microporous particles are pulverized products of gel-like silicon compounds, The gel-like silicon compound is a compound obtained by condensing or partially condensing a silane compound, The silane compound includes 1 to 3 functional silane compounds and 4 functional silane compounds.
  2. 2. The microporous particle-containing liquid according to claim 1 wherein, The content of the 4-functional silane compound is 1 to 25mol% based on the amount of the 1 to 3-functional silane compound.
  3. 3. The microporous particle-containing liquid according to claim 1 wherein, The microporous particle-containing liquid comprises at least one of a crosslinking reaction promoter and its precursor, The precursor is a substance that generates the crosslinking reaction accelerator by light or heat.
  4. 4. The microporous particle-containing liquid according to claim 3 wherein, The crosslinking reaction promoter is an acidic substance or an alkaline substance.
  5. 5. The microporous particle-containing liquid according to claim 3 wherein, The total content ratio of the crosslinking reaction accelerator and the precursor thereof is 1mol% or more relative to the total mass of the 1-3 functional silane compound and the 4 functional silane compound.
  6. 6. The microporous particle-containing liquid according to claim 1 wherein, The micropore-containing particle liquid comprises a crosslinking aid.
  7. 7. The microporous particle-containing liquid of claim 6 wherein, The cross-linking auxiliary agent is contained in a total amount of 1mol% or more based on the total mass of the 1-3 functional silane compound and the 4 functional silane compound.
  8. 8. A microporous particle-containing liquid comprising microporous particles dispersed in a dispersion medium, The microporous particles are pulverized products of gel-like silicon compounds, The gel-like silicon compound is a compound obtained by condensing or partially condensing a silane compound, The microporous particle-containing liquid contains a crosslinking reaction accelerator and at least one of its precursors, and a crosslinking auxiliary, The total content of the crosslinking reaction accelerator and the precursor thereof is 1.5mol% or more, and the total content of the crosslinking auxiliary is 2.0mol% or more, based on the total mass of the silane compounds.
  9. 9. A coating liquid comprising the microporous particle-containing liquid according to claim 1 or 8.
  10. 10. The coating liquid according to claim 9, which is a coating liquid for forming a low refractive index layer.
  11. 11. A method for producing a liquid containing microporous particles, which comprises a gel silica synthesis step and a gel pulverization step, The gel-like silica synthesis step includes a step of synthesizing a gel-like silicon compound by condensing or partially condensing a silane compound, The silane compound comprises a 1-3 functional silane compound and a4 functional silane compound, The gel pulverizing step includes a step of pulverizing the gel-like silicon compound to obtain a gel-pulverized product-containing liquid.
  12. 12. A method for producing a liquid containing microporous particles, which comprises a gel silica synthesis step, a gel pulverization step, and an addition step, The gel-like silica synthesis step includes a step of synthesizing a gel-like silicon compound by condensing or partially condensing a silane compound, The gel pulverizing step includes a step of pulverizing the gel-like silicon compound to obtain a gel-pulverized product-containing liquid, The adding step includes a step of adding a crosslinking accelerator and/or a precursor thereof and a crosslinking auxiliary agent to the gel-containing pulverized material liquid.

Description

Void layer, method for producing void layer, laminate, optical member, and optical device The present application is a divisional application of application publication No. 2024, 5, 13, application publication No. 202480042829.X, and application publication No. "void layer, method for producing void layer, laminate, optical member, and optical device". Technical Field The present disclosure relates to a void layer, a method of manufacturing the void layer, a laminate, an optical member, and an optical device. Background For the optical device, a scheme of using a low refractive index layer as a total reflection layer, for example, has been proposed. For example, patent document 1 discloses a laminate in which a layer having a lower refractive index than the light guide plate is interposed between the light guide plate and the reflection plate. As the low refractive index layer, for example, in order to make the refractive index as low as possible to air, a void layer having voids may be used. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 10-62626 Disclosure of Invention Problems to be solved by the invention As described above, the void layer is a layer having voids. In general, the refractive index of the void layer tends to be lower as the void ratio of the void layer is increased. On the other hand, when the void ratio of the void layer is increased, the mechanical strength of the void layer tends to be low. That is, the refractive index of the void layer is in a trade-off relationship with the mechanical strength of the void layer. Therefore, it is desirable to realize a void layer having high mechanical strength even at a low refractive index. Accordingly, an object of the present disclosure is to provide a void layer having a low refractive index and excellent mechanical strength, a method for producing the void layer, a laminate, an optical member, and an optical device. Means for solving the problems In order to achieve the above object, the void layer of the present disclosure is a void layer formed by chemically bonding pulverized gel-like silicon compounds, The gel-like silicon compound is a compound obtained by condensing or partially condensing a silane compound, The silane compound contains 1 to 3 functional silane compounds and 4 functional silane compounds, The refractive index of the void layer is 1.30 or less. The void layer of the present disclosure is a void layer in which pulverized gel-like silicon compounds are chemically bonded under the coexistence of additives, The gel-like silicon compound is a compound obtained by condensing or partially condensing a silane compound, The additive contains at least one of a crosslinking reaction accelerator and a precursor thereof, and a crosslinking auxiliary agent, The total content of the crosslinking reaction accelerator and the precursor thereof is 1.5mol% or more, the total content of the crosslinking auxiliary is 2.0mol% or more, based on the total mass of the silane compounds, The refractive index of the void layer is 1.30 or less. The method for producing the void layer of the present disclosure comprises a gel silica synthesis step, a gel pulverization step, and a bonding step, The gel-like silica synthesis step includes a step of synthesizing a gel-like silicon compound by condensing or partially condensing a silane compound, The silane compound contains 1-3 functional silane compounds and 4 functional silane compounds, The gel pulverizing step includes a step of pulverizing the gel-like silicon compound to obtain a pulverized product, The bonding step includes a step of chemically bonding the crushed materials. The method for producing the void layer of the present disclosure comprises a gel silica synthesis step, a gel pulverization step, and a bonding step, The gel-like silica synthesis step includes a step of synthesizing a gel-like silicon compound by condensing or partially condensing a silane compound, The gel pulverizing step includes a step of pulverizing the gel-like silicon compound to obtain a pulverized product, The bonding step includes a step of chemically bonding the crushed materials in the presence of an additive, The additive includes at least one of a crosslinking reaction accelerator and a precursor thereof, and a crosslinking auxiliary agent. The laminate of the present disclosure comprises the void layer of the present disclosure and an adhesive tie layer, The adhesive layer is directly laminated on one or both surfaces of the void layer. The optical member of the present disclosure includes a void layer of the present disclosure or a laminate of the present disclosure. The optical device of the present disclosure includes the optical member of the present disclosure. ADVANTAGEOUS EFFECTS OF INVENTION According to the present disclosure, a void layer having a low refractive index and excellent mechanical strength, a method for producing the void layer, a laminate, an optica