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Posted by Admin on 13-02-2021 in Patent Licensing Expiry date: 13-02-2023

Description

Provided are a curable composition, a light emitting diode, a liquid crystal display, and a lighting apparatus. The curable composition may have excellent processibility and workability, and excellent crack resistance, hardness, thermal resistance, transparency and adhesiveness after curing. The composition has neither whitening after being applied nor surface stickiness. The composition may be useful as an adhesive or encapsulating material of an optical semiconductor device such as an LED, a CCD or a photocoupler.

Details

Royalties
200 000 euro per year.
Filing Date
17.06.2011 00:00
Owner email
brightee@lgchem.com
Patent Claims
A curable composition, comprising:
a silicon resin which comprises a cyclic ether group and an aryl group and of which a molar ratio of the aryl group with respect to the silicon atoms is more than 0.5; and
a silicon modified alicyclic acid anhydride curing agent which comprises an aryl group and of which a molar ratio of the aryl group with respect to the silicon atoms is more than 0.5.
The curable composition according to claim 1, wherein the molar ratio of the cyclic ether groups in the silicon resin with respect to the silicon atoms in the silicon resin is from 0.05 to 0.3.
The curable composition according to claim 1, wherein the cyclic ether group is an epoxy group, an oxetane group, an epoxyalkyl group, a glycidyloxy alkyl group, or an alicyclic epoxy group.
The curable composition according to claim 1, wherein the silicon resin is represented by an average composition formula of Formula 1:

        [Formula 1]     (R3SiO1/2)a(R2SiO2/2)b(RSiO3/2)c(SiO4/2)d

where R's are substituents binding to silicon atoms, and each independently hydrogen, a hydroxyl group, a cyclic ether group, an acryl group, a methacryl group, an acryloyl group, a methacryloyl group, an isocyanate group, an alkoxy group or a monovalent hydrocarbon group, at least one R's is a cyclic ether group, at least one R's is an aryl group, and, in case where a+b+c+d is converted into 1, a is from 0 to 0.5, b is from 0 to 0.3, c is from 0.3 to 0.85, and d is from 0 to 0.2.
The curable composition according to claim 4, wherein the silicon resin has the average composition formula of Formula 1 and comprises a siloxane unit represented by Formula 2:

        [Formula 2]     [R1SiO3/2]

where R1 is a cyclic ether group.
The curable composition according to claim 4, wherein the silicon resin has the average composition formula of Formula 1 and comprises a siloxane unit represented by Formula 3 or 4:

        [Formula 3]     [R2R3SiO2/2]

        [Formula 4]     [R4SiO3/2]

where R2 and R3 are each independently an alkyl group or an aryl group, at least one of R2 and R3 is an aryl group, and R4 is an aryl group.
The curable composition according to claim 4, wherein, in Formula 1, at least one of R's is an alicyclic hydrocarbon group.
The curable composition according to claim 1, wherein the silicon resin has a weight average molecular weight of 1,500 to 7,000.
The curable composition according to claim 1, wherein the curing agent is represented by Formula 8:
Registration Date
06.18.2012 00:00
82-2-3777-1114
Registration Number
PCT/KR2012/004820
Owner
LG CHEM Ltd.
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