Nippon Kayaku Kabushiki Kaisha

Sumio Ichimura

Masataka Nakanishi

Masahiro Hirano

Masahiro Imaizumi

Katsuhiko Oshimi

Toyofumi Asano

Naoyuki Ochi

Eiichi Nishihara

Masaru Kudo

Yasumasa Akatsuka

Shigeru Moteki

Hiroo Koyanagi

Takao Sunaga

Masayuki Itai

A phenol aralkyl type phenolic resin represented by the general formula (1), wherein the total content of the compounds represented by formulae (2) to (4) is 58 to 92% as determined by GPC and the contents of the compounds represented by formulae (2) to (4) as determined by HPLC satisfy the following relationship: 0.60&#x2266;(2a+b)/(2a+2b+2c)&#x2266;0.90 wherein a is the content of the compound of formula (2); b is the content of the compound of formula (3); and c is the content of the compound of formula (4). 

Phenolic resin, process for production thereof, epoxy resin, and use thereof

An objective of this application is to provide a sealant for liquid crystals witch is extremely less apt to contaminate liquid crystals and has high adhesion strength. This application discloses a sealant for liquid crystals comprising as essential ingredients (a) a radiation-curable resin represented by the general formula (1): wherein Rrepresents a hydrogen atom or a methyl group, Rrepresents a hydrogen atom, a halogen atom, a hydroxyl group, a linear, branch or cyclic monovalent alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms, m represents an integer of 1 to 4, and may be the same or different, Rrepresents a hydrogen atom or a methyl group, and the number n of the repeating units is a positive number in the range of 0 to 20; (b) a photopolymerization initiator; and (c) an inorganic filler having an average particle diameter of 3 &#x3bc;m or less.

Sealant for liquid crystal and liquid-crystal display cell made with the same

The present invention relates to a sealant for liquid crystals having extremely low contamination nature to a liquid crystal, excellent coatability and bondability to a substrate, long service life and pot life and high adhesive strength. A sealant for liquid crystals of the present invention is characterized by comprising (a) an epoxy resin represented by general formula (1): (wherein a represents an integer of 2 to 4; n represents 0 to 3 (average value); R represents a divalent hydrocarbon group of 2 to 6 carbon atoms; A represents a polyvalent aromatic group; and G represents a glycidyl group, provided that when n is 0, (a) an epoxy resin represented by general formula (1) is a bisphenol S-type.), (b) a thermo-curing agent, (c) and a filler having average particle diameter of not larger than 3 &#x3bc;m.

Liquid crystal sealing agent and liquid crystalline display cell using the same

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Kita-ku, Japan

Sumio Ichimura