Title:
LIQUID CRYSTAL ALIGNMENT AGENT FOR PHOTOALIGNMENT, ALIGNMENT MATERIAL, AND PHASE DIFFERENCE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/184463
Kind Code:
A1
Abstract:
[Problem] To provide a liquid crystal alignment agent for photoalignment, said agent being used to provide an alignment material that exhibits a good liquid crystal aligning ability, has excellent adhesion to a liquid crystal layer, and can be separated from a TAC substrate. [Solution] A method for producing a phase difference material, said method comprising: a first step for applying, on a TAC substrate, a liquid crystal alignment agent that is a solution containing, as component (A), at least one selected from low-molecular-weight compounds having a photoalignment moiety and polymers having a photoalignment moiety, and at least one solvent selected from alcohol solvents having 1-3 carbon atoms, propylene glycol monomethyl ethers, and acyclic ketone solvents having 6-8 carbon atoms, and then drying the liquid crystal alignment agent to form a coating film; a second step for irradiating the coating film with polarized light so as to subject the coating film to an alignment process and form a liquid crystal alignment film; a third step for applying a polymerizable liquid crystal on the liquid crystal alignment film, and then heating and subsequently curing the polymerizable liquid crystal to form a phase difference material; and a fourth step for separating the thus-formed phase difference material from the TAC substrate.
Inventors:
NISHIMURA NAOYA (JP)
ITO JUN (JP)
ITO JUN (JP)
Application Number:
PCT/JP2020/009786
Publication Date:
September 17, 2020
Filing Date:
March 06, 2020
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
G02B5/30; C08F120/20; C08F120/56; G02F1/1337
Domestic Patent References:
WO2016143860A1 | 2016-09-15 | |||
WO2016052490A1 | 2016-04-07 | |||
WO2020022513A1 | 2020-01-30 | |||
WO2019159960A1 | 2019-08-22 |
Foreign References:
JP2017090508A | 2017-05-25 | |||
JP2016050275A | 2016-04-11 | |||
JP2015200858A | 2015-11-12 | |||
JP2016079189A | 2016-05-16 | |||
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JP2015227947A | 2015-12-17 |
Attorney, Agent or Firm:
HNABUSA PATENT & TRADEMARK OFFICE (JP)
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