Resin composition, paste for forming a varistor element, and varistor element
US-10141090-B2 · Nov 27, 2018 · US
Resin composition for forming varistor and varistor
US11339269B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11339269-B2 |
| Application number | US-201816770699-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2018 |
| Priority date | Dec 12, 2017 |
| Publication date | May 24, 2022 |
| Grant date | May 24, 2022 |
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Abstract
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Provided are a resin composition for forming a varistor and a varistor capable of increasing freedom in the design of substrates, ICs, or electronics. The resin composition for forming a varistor includes (A) an epoxy resin, (B) a curing agent, (C) carbon nanotubes, and (D) a dispersant. The (C) carbon nanotubes may be single-walled carbon nanotubes, multi-walled carbon nanotubes, or a combination thereof. The (D) dispersant includes a polyalkyl oxide surfactant. The polyalkyl oxide surfactant has a polyalkyl ether skeleton in the molecule.
First claim
Opening claim text (preview).
The invention claimed is: 1. A resin composition for forming a varistor comprising: (A) an epoxy resin, (B) a curing agent, (C) carbon nanotubes, and (D) a dispersant, wherein the carbon nanotubes (C) comprise isolated single-walled semiconducting carbon nanotubes. 2. The resin composition for forming a varistor according to claim 1 , wherein the epoxy resin (A) comprises at least one selected from the group consisting of bisphenol A epoxy resins, brominated bisphenol A epoxy resins, bisphenol F epoxy resins, aminophenol epoxy resins, biphenyl epoxy resins, novolak epoxy resins, alicyclic epoxy resins, naphthalene epoxy resins, ether epoxy resins, polyether epoxy resins and silicone epoxy copolymer resins. 3. The resin composition for forming a varistor according to claim 1 , wherein the curing agent (B) comprises at least one selected from the group consisting of amine compounds, phenols, acid anhydrides and imidazole compounds. 4. The resin composition for forming a varistor according to claim 1 , wherein the carbon nanotubes (C) further comprise multi-walled carbon nanotubes. 5. The resin composition for forming a varistor according to claim 1 , wherein the carbon nanotubes (C) consist of isolated single-walled semiconducting carbon nanotubes. 6. The resin composition for forming a varistor according to claim 1 , wherein the resin composition includes the carbon nanotubes (C) in an amount of 0.05 to 2 parts by weight with respect to 100 parts by weight of the epoxy resin (A). 7. The resin composition for forming a varistor according to claim 1 , wherein the dispersant (D) comprises at least one selected from the group consisting of anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, hydrocarbon surfactants, fluorine surfactants, silicon surfactants, polycarboxylic acids, polyether carboxylic acids, polycarboxylic acid salts, alkylsulfonic acid salts, alkylbenzenesulfonic acid salts, alkyl ether sulfonic acid salts, aromatic polymers, organic conductive polymers, polyalkyl oxide surfactants, inorganic salts, organic acid salts and aliphatic alcohols. 8. The resin composition for forming a varistor according to claim 7 , wherein the dispersant (D) comprises a polyalkyl oxide surfactant, and the polyalkyl oxide surfactant has a polyalkyl ether skeleton in the molecule. 9. A varistor comprising a cured product of the resin composition for forming a varistor according to claim 1 .
Assignees
Inventors
Classifications
Varistor boundary, e.g. surface layers (H01C7/12 takes precedence) · CPC title
voltage responsive, i.e. varistors · CPC title
Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title
- C08K3/041Primary
Carbon nanotubes · CPC title
Varistor cores (H01C7/12 takes precedence) · CPC title
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- What does patent US11339269B2 cover?
- Provided are a resin composition for forming a varistor and a varistor capable of increasing freedom in the design of substrates, ICs, or electronics. The resin composition for forming a varistor includes (A) an epoxy resin, (B) a curing agent, (C) carbon nanotubes, and (D) a dispersant. The (C) carbon nanotubes may be single-walled carbon nanotubes, multi-walled carbon nanotubes, or a combinat…
- Who is the assignee on this patent?
- Namics Corp
- What technology area does this patent fall under?
- Primary CPC classification C08K3/041. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 24 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).