JPWO2023176843A5 - - Google Patents

Claims (9)

A sealant for liquid crystal display elements containing a curable resin and at least one of a polymerization initiator and a thermosetting agent,
The curable resin is an epoxy compound having a Hansen solubility parameter dispersion term of ^19.0 MPa or more and 21.9 ^MPa or less and an octanol/water partition coefficient of 3.0 or more and 9.0 or less. , a compound in which some of the epoxy groups of the epoxy compound are modified with (meth)acrylic, and a compound in which all the epoxy groups of the epoxy compound are modified with (meth)acrylic. A sealant for liquid crystal display elements characterized by: The epoxy compound whose dispersion term of the Hansen solubility parameter is 19.0 MPa ^0.5 or more and 21.9 MPa ^0.5 or less and whose octanol/water partition coefficient is 3.0 or more and 9.0 or less has the following formula ( The sealant for liquid crystal display elements according to claim 1, which is a compound represented by 1-1), (1-2), or (1-3).

In formulas (1-1) to (1-3), R ¹ to R ⁶ each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 4 carbon atoms, and an alkoxy group having 1 to 4 carbon atoms. , phenyl group, furanyl group, thienyl group, pyrrolyl group, pyridinyl group, biphenyl group, or cyclohexyl group, and R ⁷ and R ⁸ are glycidyloxy groups. The epoxy compound whose dispersion term of the Hansen solubility parameter is 19.0 MPa ^0.5 or more and 21.9 MPa ^0.5 or less and whose octanol/water partition coefficient is 3.0 or more and 9.0 or less has the above formula ( The sealant for liquid crystal display elements according to claim 2, which is a compound represented by 1-2). The epoxy compound whose dispersion term of the Hansen solubility parameter is 19.0 MPa ^0.5 or more and 21.9 MPa ^0.5 or less and whose octanol/water partition coefficient is 3.0 or more and 9.0 or less has the above formula ( The sealant for liquid crystal display elements according to claim 2, which is a compound represented by 1-3). The dispersion term of the Hansen solubility parameter in 100 parts by weight of the entire curable resin is ^19.0 MPa or more and ^21.9 MPa or less, and the octanol/water partition coefficient is 3.0 or more and 9.0. The content of the following epoxy compounds, a compound in which some of the epoxy groups of the epoxy compound are (meth)acrylic modified, and a compound in which all the epoxy groups of the epoxy compound are (meth)acrylic modified is 10 parts by weight or more. The sealant for liquid crystal display elements according to claim 1, 2, 3 or 4, wherein the amount is 90 parts by weight or less. The curable resin further includes a bisphenol A type epoxy compound, a bisphenol F type epoxy compound, a partially (meth)acrylic modified bisphenol A type epoxy compound, a partially (meth)acrylic modified bisphenol F type epoxy compound, a bisphenol A type epoxy (meth) ) acrylate , and bisphenol F type epoxy (meth)acrylate. The curable resin further includes a compound having a weight average molecular weight of 850 or more obtained by modifying some of the epoxy groups of the bifunctional epoxy compound with (meth)acrylic, and a compound with a weight average molecular weight of 850 or more, in which some of the epoxy groups of the bifunctional epoxy compound are modified with (meth)acrylic. The sealant for a liquid crystal display element according to claim 1, comprising at least one of a modified compound having a weight average molecular weight of 850 or more. Furthermore, it contains an inorganic filler,
5. The sealant for liquid crystal display elements according to claim 1, wherein the content of the inorganic filler in 100 parts by weight of the sealant for liquid crystal display elements is 5 parts by weight or more and 50 parts by weight or less. A liquid crystal display element comprising a cured product of the sealant for liquid crystal display elements according to claim 1, 2, 3 or 4 .