JP2018041079A5

JP2018041079A5 -

Info

Publication number: JP2018041079A5
Application number: JP2017169365A
Authority: JP
Filing date: 2017-09-04
Publication date: 2020-09-24
Anticipated expiration: 2037-09-04

Claims

A polarizing plate containing a polarizing element and a protective film laminated on at least one surface of the polarizing element via an adhesive layer, wherein the adhesive layer is a cationically polymerizable compound and a first acid generation. A cured product of an adhesive containing an agent and a second acid generator.
The first acid generator is an ionic compound having a curing temperature of less than 120 ° C., and the counter anion constituting the ionic compound has the following formula (1).

[In the formula, R ¹ is a C _6-14 aryl group which may have a substituent or a C _3-14 aromatic heterocyclic group which may have a substituent, and R ^{2 to} R ⁴ are Independent of each other, a C _1-18 alkyl group, a C _6-14 aryl group which may have a substituent or a C _3-14 aromatic heterocyclic group which may have a substituent, and the above-mentioned substitutions. The groups are C _1-18 alkyl group, halogenated C _1-8 alkyl group, C _2-18 alkenyl group, C _2-18 alkynyl group, C _6-14 aryl group, C _3-14 aromatic heterocyclic group, nitro. Group, hydroxyl group, cyano group, alkoxy group or aryloxy group represented by -OR ⁵ , acyl group represented by R ⁶ CO-, acyloxy group represented by R ⁷ COO-, represented by -SR ^8. It is an alkylthio group or an arylthio group, an amino group represented by -NR ⁹ R ¹⁰ , or a halogen atom, and R ^{5 to} R ⁸ are C _1-8 alkyl groups, C _6-14 aryl groups or C _3-14 aromatics. Group heterocyclic groups, the R ⁹ and R ¹⁰ are hydrogen atoms, C _1-8 alkyl groups, C _6-14 aryl groups or C _3-14 aromatic heterocyclic groups].
Anion represented by or the following formula (2)

[In the formula, Rf represents the same or different alkyl group in which 80% or more of hydrogen is substituted with a fluorine atom, and a is an integer of 1 to 5]
It is an ionic compound that is an anion represented by
The second acid generating agent is a polarizing plate which is an ionic compound having a curing temperature of 120 ° C. or higher and generating an acid by active energy rays.

The polarizing plate according to claim 1, wherein the adhesive layer is cured by irradiating the adhesive with active energy rays and then heating the adhesive.

The first acid generator is the following formula (3)

[In the formula, R ¹¹ and R ¹² independently represent an alkyl group, an aralkyl group, an aryl group or an aromatic heterocyclic group, and R ¹³ represents a phenyl group which may have a substituent, and X ⁻ Is an anion represented by the above formula (1) or formula (2)]
The polarizing plate according to claim 1 or 2, which is an ionic compound represented by.

The polarizing plate according to any one of claims 1 to 3, wherein the cautane-anion of the second acid generator is an anion represented by the above formula (1) or the above formula (2), or PF ₆ ^−. ..

The polarizing plate according to any one of claims 1 to 4, wherein the cautane-cation of the second acid generator is a sulfonium-based cation.

The polarizing plate according to any one of claims 1 to 5, wherein the cationically polymerizable compound contains at least one compound selected from the group consisting of an epoxy compound, an oxetane compound and a vinyl compound.

13. The polarizing plate according to the description.

The method for producing a polarizing plate according to any one of claims 1 to 7.
(A) Step of applying adhesive to the polarizer and / or protective film (b) Step of laminating the polarizer and the protective film (c) Step of irradiating the laminate obtained in step (b) with active energy rays. And (d) a method comprising the step of then heating the laminate.