Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
  • C08F10/14—Monomers containing five or more carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms

Definitions

• the present invention relates to a transparent substrate and a transparent laminate.
• Patent Document 1 describes a transparent conductive film substrate in which a polyethylene terephthalate (PET) film is coated with indium tin oxide (ITO).
• PET polyethylene terephthalate
• ITO indium tin oxide
• the present invention aims to provide a transparent substrate that is highly transparent, has a low relative dielectric constant and a low dielectric tangent, and is capable of being reflow soldered, and a transparent laminate that includes the transparent substrate.
• the present inventors have conceived the following invention and found that the problems can be solved. That is, the present invention is as follows.
• a transparent substrate comprising a resin composition containing a 3-methyl-1-butene polymer, the transparent substrate having a total light transmittance of 80% or more as measured in accordance with JIS K 7375:2008.
• the 3-methyl-1-butene polymer is at least one selected from the group consisting of a 3-methyl-1-butene homopolymer and a copolymer of 3-methyl-1-butene with ethylene or an ⁇ -olefin, and the ⁇ -olefin has 3 to 20 carbon atoms.
• a transparent laminate comprising the transparent substrate according to any one of [1] to [8] and a transparent conductive layer covering one or both sides of the transparent substrate.
• the transparent laminate according to [9] having a total light transmittance of 80% or more as measured based on JIS K 7375:2008.
• the present invention provides a transparent substrate that is highly transparent, has a low dielectric constant and a low dielectric tangent, and is capable of being reflow soldered, and a transparent laminate that includes the transparent substrate.
• the transparent substrate of the present embodiment is a transparent substrate containing a resin composition containing a 3-methyl-1-butene polymer, and has a total light transmittance of 80% or more as measured based on JIS K 7375:2008.
• the total light transmittance can be measured by the method described in the Examples in detail.
• the term "transparent substrate” refers to a transparent substrate having a total light transmittance of 80% or more as measured based on JIS K 7375:2008. That is, the transparent substrate of the present embodiment has a total light transmittance of 80% or more even when it contains a resin composition containing a 3-methyl-1-butene polymer.
• the resin composition contained in the transparent substrate contains a 3-methyl-1-butene polymer, which makes it possible to obtain a transparent substrate that is highly transparent, has a low relative dielectric constant and dielectric tangent, and has a low water absorption rate. Because the transparent substrate has a low water absorption rate, it can be reflow soldered even after being left in an atmosphere of 85°C and 85% RH for 7 days.
• the transparent substrate of this embodiment may consist of only the resin composition, or may contain components other than the resin composition.
• the resin composition of the present embodiment contains a 3-methyl-1-butene polymer.
• the resin composition contains a 3-methyl-1-butene polymer, it is possible to obtain a transparent substrate which has high transparency, a low relative dielectric constant and a low dielectric loss tangent, and is capable of being subjected to reflow soldering.
• the 3-methyl-1-butene polymer has a small specific gravity, it is possible to reduce the weight.
• the 3-methyl-1-butene polymer is a polymer containing at least a structural unit derived from 3-methyl-1-butene.
• the 3-methyl-1-butene polymer may be a 3-methyl-1-butene homopolymer, or may be a copolymer of 3-methyl-1-butene and an unsaturated hydrocarbon. Examples of the unsaturated hydrocarbon include ethylene and ⁇ -olefins.
• the ⁇ -olefin used in the 3-methyl-1-butene polymer means an ⁇ -olefin other than 3-methyl-1-butene.
• the ⁇ -olefin means an ⁇ -olefin other than 3-methyl-1-butene, and is also expressed as ⁇ -olefin (excluding 3-methyl-1-butene).
• the unsaturated hydrocarbon is preferably ethylene or an ⁇ -olefin having 3 to 20 carbon atoms.
• the copolymer of 3-methyl-1-butene with ethylene or an ⁇ -olefin having 3 to 20 carbon atoms means, in other words, a copolymer of 3-methyl-1-butene with ethylene or a copolymer of 3-methyl-1-butene with an ⁇ -olefin having 3 to 20 carbon atoms.
• the copolymer of 3-methyl-1-butene with ethylene or an ⁇ -olefin will also be referred to simply as "copolymer”.
• the copolymer may be a random copolymer, a block copolymer, or an alternating copolymer.
• the method for producing the copolymer is not limited as long as it does not impair the effects of the present invention, and any known copolymerization method can be used.
• the content of structural units derived from ethylene or an ⁇ -olefin in 100 mol % of the copolymer is preferably more than 0 mol % and 20 mol % or less. From the viewpoint of flexibility and impact resistance, the content of structural units derived from ethylene or an ⁇ -olefin in 100 mol % of the copolymer is more preferably 0.1 mol % or more, and even more preferably 0.5 mol % or more.
• the content of structural units derived from ethylene or an ⁇ -olefin in 100 mol % of the copolymer is more preferably 15 mol % or less, and even more preferably 10 mol % or less. From these viewpoints, the content of structural units derived from ethylene or an ⁇ -olefin in 100 mol % of the copolymer is more preferably 0.1 to 15 mol %, and even more preferably 0.5 to 10 mol %. In one embodiment, the content of structural units derived from ethylene or an ⁇ -olefin in 100 mol % of the copolymer is preferably more than 0 mol % and 10 mol % or less.
• the content of the structural units derived from ethylene or ⁇ -olefin in the copolymer can be determined by a Fourier transform infrared spectrophotometer (FT-IR). Specifically, it can be measured by the method described in the examples.
• FT-IR Fourier transform infrared spect
• the content of structural units derived from 3-methyl-1-butene in 100 mol % of the copolymer is preferably 80 mol % or more and less than 100 mol %.
• the content of structural units derived from 3-methyl-1-butene in 100 mol% of the copolymer is preferably more than 50 mol%, more preferably 70 mol% or more, more preferably 85 mol% or more, even more preferably 90 mol% or more, still more preferably 92 mol% or more, and even more preferably 93 mol% or more.
• the content of structural units derived from 3-methyl-1-butene in 100 mol % of the copolymer is more preferably 99.9 mol % or less, and even more preferably 99.5 mol % or less.
• the content of structural units derived from 3-methyl-1-butene in 100 mol% of the copolymer is preferably 85 to 99.9 mol%, more preferably 90 to 99.5 mol%, even more preferably 92 to 99.5 mol%, still more preferably 93 to 99.5 mol%, even more preferably 93 to 99.0 mol%, and most preferably 93.0 to 95.0%.
• the ethylene or ⁇ -olefin is preferably an ⁇ -olefin having 3 to 20 carbon atoms, more preferably an ⁇ -olefin having 4 to 16 carbon atoms, more preferably an ⁇ -olefin having 4 to 12 carbon atoms, even more preferably an ⁇ -olefin having 4 to 10 carbon atoms, and even more preferably an ⁇ -olefin having 6 to 10 carbon atoms.
• the ⁇ -olefin may be linear, branched, cyclic, or may contain a cyclic portion.
• Examples of ⁇ -olefins having 3 to 20 carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4-methyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4,4-dimethyl-1-pentene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, vinylcyclohexene, and vinylnorbornane.
• the ⁇ -olefin having 3 to 20 carbon atoms is preferably a linear ⁇ -olefin, more preferably at least one selected from the group consisting of 1-butene, 1-octene, 1-nonene, and 1-decene, even more preferably at least one selected from the group consisting of 1-octene, 1-nonene, and 1-decene, and even more preferably 1-decene.
• the ⁇ -olefins having 3 to 20 carbon atoms may be used alone or in combination of two or more kinds.
• the melt viscosity of the 3-methyl-1-butene polymer of the present embodiment is preferably 10 to 1,000 Pa ⁇ s.
• the melt viscosity of the 3-methyl-1-butene polymer is 10 Pa ⁇ s or more, the mechanical strength is further improved, and when the melt viscosity is 1,000 Pa ⁇ s or less, good flowability during molding is easily obtained.
• the melt viscosity of the 3-methyl-1-butene polymer is more preferably 30 to 500 Pa ⁇ s, further preferably 50 to 300 Pa ⁇ s, further more preferably 50 to 200 Pa ⁇ s, and further more preferably 70 to 150 Pa ⁇ s.
• the content of the 3-methyl-1-butene polymer in the components of the resin composition excluding the filler is preferably 50.0 to 99.9 mass%, more preferably 60.0 to 99.9 mass%, even more preferably 65.0 to 99.9 mass%, and still more preferably 90.0 to 99.9 mass%, from the viewpoint of obtaining a transparent substrate having a lower relative dielectric constant and a lower dielectric loss tangent.
• the acrylic phenol compound used in this embodiment can be represented, for example, by the following general formula (I).
• R 1 represents a hydrogen atom or a methyl group
• R 2 represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
• R 3 , R 4 , R 5 and R 6 each independently represent an alkyl group having 1 to 9 carbon atoms.
• the alkyl group having 1 to 3 carbon atoms include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group.
• the alkyl group having 1 to 9 carbon atoms may be either linear or branched.
• alkyl group having 1 to 9 carbon atoms examples include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, an s-butyl group, a t-butyl group, a 1,1-dimethylpropyl group, a 1,2-dimethylpropyl group, a 2,2-dimethylpropyl group, a 1-methylbutyl group, a 2-methylbutyl group, a 3-methylbutyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, and an n-nonyl group.
• R1 is preferably a hydrogen atom.
• R2 is preferably a hydrogen atom or a methyl group, more preferably a methyl group.
• R 3 , R 4 , R 5 and R 6 are each independently preferably an alkyl group having 3 to 8 carbon atoms, more preferably an alkyl group having 5 carbon atoms, and even more preferably a 1,1-dimethylpropyl group.
• test pieces length: 40 mm, width: 40 mm, thickness: 0.5 mm.
• the test pieces were used to measure the relative dielectric constant and dielectric loss tangent at a measurement frequency of 200 GHz by a frequency change method using a vector network analyzer (Anritsu ME7838G 70 kHz to 220 GHz).
• the total light transmittance was measured using a haze meter HZ-V3 (manufactured by Suga Test Instruments Co., Ltd.) according to JIS K 7375: 2008. The evaluation results are shown in Table 1. The total light transmittance was rated as A when it was 80% or more, and B when it was less than 80%.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Laminated Bodies (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

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Citations (5)

• 2023
  • 2023-12-27 JP JP2024567917A patent/JPWO2024143451A1/ja active Pending
  • 2023-12-27 WO PCT/JP2023/046870 patent/WO2024143451A1/ja active Pending
  • 2023-12-28 TW TW112151275A patent/TW202440314A/zh unknown

Patent Citations (5)

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