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JP-7855005-B2 - Composition, functional layer, and display module

JP7855005B2JP 7855005 B2JP7855005 B2JP 7855005B2JP-7855005-B2

Inventors

  • 朱修劍
  • 劉仁杰

Assignees

  • 昆山国顕光電有限公司

Dates

Publication Date
20260507
Application Date
20221213
Priority Date
20220505

Claims (15)

  1. A composition containing, by mass, 50 to 70 parts (meth)acrylic acid compound, 30 to 50 parts additive, 30 to 50 parts active diluent, and 0 to 10 parts auxiliary agent, The (meth)acrylic acid compound is at least one selected from the group consisting of (meth)acrylic acid, polyurethane (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, and epoxy (meth)acrylate. The additive is at least one selected from the group consisting of polystyrene-polyisoprene-polystyrene block copolymer , derivatives of polystyrene-polyisoprene-polystyrene block copolymer , polyethylene-polyisoprene-polyethylene block copolymer, derivatives of polyethylene-polyisoprene-polyethylene block copolymer , polypropylene-polyisoprene-polyethylene block copolymer, and derivatives of polypropylene-polyisoprene-polyethylene block copolymer. The composition wherein the active diluent is a (meth)acrylic acid ester compound, and the (meth)acrylic acid ester compound is at least one selected from the group consisting of ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, and hydroxyl (meth)acrylate.
  2. The composition according to claim 1, wherein the additive has a weight-average molecular weight of 100,000 to 300,000.
  3. The composition according to claim 1, wherein the additive is a polystyrene-polyisoprene-polystyrene block copolymer and/or a derivative of a polystyrene-polyisoprene-polystyrene block copolymer, wherein the polystyrene block is 60 to 85 wt% and the polyisoprene block is 15 to 40 wt%.
  4. The composition according to claim 1, further comprising a photoinitiator containing one or more of the following: 1-hydroxycyclohexylphenyl ketone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 2-benzyl-2-dimethyl-1-(4-morpholinophenyl)butanone, benzophenone, 4-phenylbenzophenone, benzoin diethyl ether, 2-chlorothioxanthone, and 2,4-diethylthioxanthone.
  5. The composition according to claim 1, wherein the auxiliary agent comprises one or more of an antifoaming agent, a leveling agent, and a polymerization inhibitor.
  6. The composition according to claim 5, wherein the polymerization inhibitor contains at least one of hydroquinone, benzoquinone, parahydroxyanisole, 2-tert-butylhydroquinone, 2,5-di-tert-butylhydroquinone, and tris(N-nitroso-N-phenylhydroxylamine)aluminum salt.
  7. A functional layer comprising a raw material containing the composition described in any one of claims 1 to 6.
  8. The functional layer according to claim 7, wherein the functional layer contains at least a polymer obtained by polymerizing the (meth)acrylic acid compound, additives, and active diluent as monomers.
  9. The functional layer according to claim 8, wherein the functional layer has an acid value of 0 to 1.4 and a hydroxyl value of 0 to 3.9.
  10. The functional layer according to claim 9, wherein the functional layer has an acid value of 0 to 1 and a hydroxyl value of 0 to 3.
  11. The functional layer according to claim 8, wherein the energy storage modulus is 164 kPa to 180 kPa.
  12. The functional layer according to claim 11, wherein the energy storage modulus is 170 kPa to 172 kPa.
  13. The aforementioned functional layer is The functional layer according to claim 7, obtained by a preparation method comprising polymerizing the raw materials containing the composition.
  14. A display module having the functional layer described in claim 7.
  15. The display module according to claim 14, wherein the display module has a display panel and a support layer located on the non-light-emitting side of the display panel, and the functional layer is located between the display panel and the support layer.

Description

This application relates to compositions, functional layers, and display modules, and belongs to the field of display technology. With the advancement of display technology, there is a growing demand for higher performance in display devices. Among these, flexible display screens, due to their ability to be freely bent, offer superior visual appeal when deployed and the advantages of being portable and compact when stored, are increasingly becoming a major trend in the development of electronic products. However, flexible display screens can be damaged during use by varying degrees of static electricity buildup and discharge processes, seriously affecting the normal display function and, in particular, causing the green screen phenomenon due to static electricity. To clarify the purpose, technical solution, and advantages of this application, the technical solution will be described clearly and completely below with reference to the embodiments of this application. Naturally, the embodiments described are only a portion of the embodiments of this application, not all of them. Those skilled in the art will find that all other embodiments obtained without creative work based on the embodiments of this application fall within the scope of protection. In a first aspect, the present application provides a composition containing, by mass, 50 to 70 parts (meth)acrylic acid compound, 30 to 50 parts additive, 30 to 50 parts active diluent, and 0 to 10 parts auxiliary agent. The additive includes a first polyolefin-polyisoprene-second polyolefin block copolymer and/or a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer. However, the (meth)acrylic acid compound includes at least one of (meth)acrylic acid, polyurethane (meth) acrylate , polyester (meth) acrylate , polyether (meth) acrylate , and epoxy (meth) acrylate , and the first polyolefin-polyisoprene-second polyolefin block copolymer refers to two polyolefin blocks linked via polyisoprene, and this application does not limit the specific monomers in the first polyolefin and the second polyolefin, and the monomers in the first polyolefin and the second polyolefin are polymers obtained by independently polymerizing olefin monomers. Exemplarily, such monomers include blocks obtained by independently ethylene homopolymerization, blocks obtained by independently propylene homopolymerization, or ethylene-propylene copolymer blocks. This application does not limit the molecular weights of the first polyolefin and the second polyolefin, and their molecular weights may be the same or different. Furthermore, this application does not limit the molecular weight of the first polyolefin-polyisoprene-second polyolefin block copolymer, and the block copolymer generally has a weight-average molecular weight of 100,000 or more. The additive of this application may be a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer, or a composition of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives, in addition to the first polyolefin-polyisoprene-second polyolefin block copolymer. When the additive is a composition of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives, this application does not limit the mass ratio of the first polyolefin-polyisoprene-second polyolefin block copolymer and its derivatives. In this application, a derivative of the first polyolefin-polyisoprene-second polyolefin block copolymer refers to a product obtained by substituting the first polyolefin and/or the second polyolefin with substituents. Examples of substituents include C1-C10 alkyl groups (including linear alkyl groups, branched alkyl groups, and naphthenes), halogens, hydroxyl groups, nitro groups, amino groups, cyano groups, silyl groups, and siloxy groups. The active diluent mainly consists of (meth)acrylic acid ester compounds, and contains at least one of the following: ethyl (meth)acrylate, butyl (meth)acrylate, methyl (meth)acrylate, hydroxyl (meth)acrylate, glycol-based ethyl (meth)acrylate, glycol-based butyl (meth)acrylate, glycol-based methyl (meth)acrylate, glycol-based hydroxyl (meth)acrylate, alkoxy(meth)acrylate, butyl alkoxy(meth)acrylate , methyl alkoxy ( meth)acrylate, and hydroxyl alkoxy(meth)acrylate. Furthermore, the auxiliary agents in the composition mainly consist of one or more of the following: defoaming agents, leveling agents, and polymerization inhibitors. The primary role of an antifoaming agent is to suppress, reduce, or remove bubbles in a composition. This application does not specifically limit the selection of the antifoaming agent, as long as it can satisfy the above performance requirements, such as alcohol-based compounds. The primary role of polymerization inhibitors is to improve the storage stability of the composition. Polymerization inhibitors may contain at least one of the following: hydroquinone, benzoquinone, parahydroxyani