公开(公告)号：EP4455128A1

公开(公告)日：2024-10-30

申请号：EP22911340.2

申请日：2022-12-22

申请人： Tosoh Corporation ,  Sagami Chemical Research Institute

发明人： ICHIJO, Hiroki ,  SAKASHITA, Ryuichi ,  MURAKAMI, Noritake ,  SHICHIDA, Yuki ,  INABA, Ayato ,  KITAGAWA, Takahiro ,  YOKOI, Taiyo ,  IBE, Kouta ,  KOBAYASHI, Osamu

IPC分类号： C07D307/46 ,  C07D333/16 ,  G02B1/04 ,  G02B5/30 ,  H05B33/02 ,  H10K50/00

摘要： A main chain polymer according to this embodiment comprises, in its polymer main chain, a photoreactive reverse wavelength dispersion unit that exhibits both the functions of photoreactivity and reverse wavelength dispersion of birefringence, wherein the photoreactive reverse wavelength dispersion unit has a structure represented by chemical formula (1) below.

[In chemical formula (1) above, L 1 and L 2 may be the same or different from each other, each representing a carbonyl group, an ester linkage, an amide linkage, an ether linkage or a single bond. * represents a site of binding with another structure in the main chain polymer. Ar represents a ring system selected from the group consisting of a monocyclic aromatic ring system, a polycyclic aromatic ring system and an annulated aromatic ring system whose ring-constituting atoms are atoms selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, with the monocyclic aromatic ring system, polycyclic aromatic ring system or annulated aromatic ring system optionally having a substituent. R°, R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom, a halogen atom or a C1 to C8 alkyl group.]

公开(公告)号：EP4455174A1

公开(公告)日：2024-10-30

申请号：EP22911283.4

申请日：2022-12-21

申请人： Tosoh Corporation ,  Kai Photonics Co., Ltd.

发明人： YAMADA, Satoru ,  WATANABE, Misaki ,  KATAGIRI, Fumiaki ,  KITAGAWA, Takahiro ,  SAKASHITA, Ryuichi ,  KOIKE, Yasuhiro

IPC分类号： C08F222/40 ,  C08F2/18 ,  C08F2/20 ,  C08F22/40 ,  C08F210/00 ,  C08F212/06 ,  C08F218/04 ,  C08F220/18 ,  C08L33/24 ,  C08L35/00

摘要： It is an object to provide a method for efficiently producing an N-alkylmaleimide-based polymer that has an excellent optical characteristic, excellent heat resistance, and excellent mechanical strength. A method for producing an N-alkylmaleimide-based polymer in accordance with an aspect of the present invention includes using an oil-soluble radical polymerization initiator to carry out suspension polymerization, in an aqueous medium in the presence of at least one dispersant selected from the group consisting of a nonionic compound having no hydrogen bonded to oxygen or nitrogen, a polyacrylate salt, and a polyalkylene glycol, with respect to a monomer mixture consisting of 20% by weight to 100% by weight of N-alkylmaleimide and 0% by weight to 80% by weight of other copolymerizable monomers, the N-alkylmaleimide being represented by the following general formula (1):

where R represents a C1-C12 linear alkyl group, a C3-C12 branched alkyl group, or a C3-C6 cyclic alkyl group.

公开(公告)号：EP4299283A1

公开(公告)日：2024-01-03

申请号：EP22780800.3

申请日：2022-03-28

申请人： Tosoh Corporation

发明人： YOSHIMURA, Asuka ,  KOMINE, Takuya ,  SAKASHITA, Ryuichi ,  ICHIJO, Hiroki

IPC分类号： B29C55/02 ,  C08F222/14 ,  C08J5/18 ,  G02B5/30

摘要： The present invention provides a resin which has low wavelength dispersion R 450 /R 550 and is capable of improving the viewing angle characteristics and contrast over a wide wavelength range; and a film which uses this resin. A fumaric acid diester resin according to the present invention contains a fumaric acid diester residue unit that is represented by formula (1) and a (meth)acrylic acid ester residue unit that is represented by formula (2).