Patent ID: 12202997

DESCRIPTION OF REFERENCE NUMERALS

3: organic electronic device31: substrate32: organic electronic element33: organic layer34: inorganic layer35: protective layer36: sealing structure37: sealing film38: cover substrate

BEST MODE

Hereinafter, the present disclosure will be described in more detail through Examples and Comparative Examples, but the scope of the present invention is not limited by the following examples.

Example 1

An alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 22.2:18.8:49.0:5.0:1.0 (Celloxide2021P: DE203: OXT-221: I290: F552) at room temperature. CaO (Aldrich, average particle diameter of about 150 nm) was introduced thereto so that the amount of the moisture adsorbent was 15 parts by weight relative to 100 parts by weight of the epoxy compounds.

In the mixing vessel, a uniform encapsulating composition was prepared using a planetary mixer (Kurabo, KK-250s).

Example 2

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) as an epoxy compound, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator containing a sulfonium salt (I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 37.5:52.5:5.0:1.0 (Celloxide2021P: OXT-221: I290: F552) at room temperature.

Example 3

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 37.5:7.0:45.5:5.0:1.0 (Celloxide2021P: DE203: OXT-221: I290: F552) at room temperature.

Example 4

An encapsulating composition was prepared in the same method as in Example 1, except that Irgacure 250 (active contents 75 wt %, solvent (propylene carbonate) 25 wt %) from BASF as a iodonim photoinitiator was used instead of I290 as the photoinitiator.

Example 5

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290), a fluorine-based surfactant (F552 from DIC) and diethylene glycol monobutyl ether acetate were each introduced into a mixing vessel at a weight ratio of 17.2:18.8:44.0:5.0:1.0:10.0 (Celloxide2021P: DE203: OXT-221: I290: F552: diethylene glycol monobutyl ether acetate) at room temperature.

Example 6

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 5:26:48:5:1 (Celloxide2021P: DE203: OXT-221: I290: F552) at room temperature.

Comparative Example 1

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 2.3:23.4:64.3:5.0:1.0 (Celloxide2021P: DE203: OXT-221: I290: F552) at room temperature.

Comparative Example 2

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) and an aliphatic epoxy compound (DE203, HAJIN CHEM TECH) as epoxy compounds, an oxetane group-containing compound (OXT-221 from TOAGOSEI), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 10:10:59:5:1 (Celloxide2021P: DE203: OXT-221: I290: F552) at room temperature.

Comparative Example 3

An encapsulating composition was prepared in the same method as in Example 1, except that an alicyclic epoxy compound (Celloxide 2021P from Daicel) as an epoxy compound, an oxetane group-containing compound (3-allyloxy oxetane from TCI), tri(ethylene glycol) divinyl ether (TEGDVE), a photoinitiator (Irgacure PAG 290 from BASF, hereinafter, I290) and a fluorine-based surfactant (F552 from DIC) were each introduced into a mixing vessel at a weight ratio of 20:50:30:5:1 (Celloxide2021P: 3-allyloxy oxetane: TEGDVE: I290: F552) at room temperature.

Physical properties in Examples and Comparative Examples were evaluated in the following manner.

1. SiNx Deposited Film Experiment

On a glass base material on which a SiNx deposited film was formed, the encapsulating compositions prepared in Examples and Comparative Examples were each inkjet-coated to form an organic layer having a thickness of 5 μm.

The sample was observed under constant temperature and humidity conditions of 85° C. and 85% RH for a lifting phenomenon of the deposited film. It was classified as X when the lifting occurred 50% or more relative to the total area by observation for 1000 hours, as Δ when the lifting occurred less than 50% relative to the total area and as O when no lifting occurred at all.

2. Determination of Discharge Possibility and Ink-Jetting Suitability

Ink-jetting was attempted using Unijet UJ-200 (Inkjet head-Dimatix 10Pl 256) for the encapsulating compositions prepared in Examples and Comparative Examples. Discharge tests were performed at intervals of 5 minutes, and it was classified as O when dischargeable duration was 3 hours or more, as A when it was 1 hour or more and less than 3 hours and as X when it was less than 1 hour.

TABLE 1SiNx depositedDetermination offilmdischarge possibility andexperimentink-jetting suitabilityExample 1OOExample 2OΔExample 3OΔExample 4ΔOExample 5ΔOExample 6ΔOComparative Example 1XOComparative Example 2XOComparative Example 3XX