Thermosetting epoxy-silicone hybrid resin composition for white reflectors and optoelectronic devices

Abstract

Provided is a resin composition that gives a cured product having excellent bending properties at room temperature, excellent initial reflectance and heat resistance, low light transmittance, and excellent adhesion to a substrate plated with a metal such as gold or silver. 【Solution means】 (A) A prepolymer which is a reaction product of the following (A-1), (A-2) and (A-3), (A-1) An organopolysiloxane having at least an aliphatic epoxy group-containing D unit and an aromatic hydrocarbon group-containing T unit (A-2) A specific epoxy resin (A-3) An acid anhydride-based curing agent (B) Zinc cyanurate, (C) A white pigment, (D) An inorganic filler, (E) A curing catalyst, and (F) Antioxidant A thermosetting epoxy-silicone hybrid resin composition for a white reflector containing these.

Claims

1. (A) Prepolymers which are reaction products of (A-1), (A-2), and (A-3) below. (A-1) The following average composition formula (1) 【Chemistry 1】 (In the formula, R 1 R is independently a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, or a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms. 2 R is a monovalent aliphatic epoxy group having 4 to 30 carbon atoms. 3 (The group is a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, or a monovalent aliphatic hydrocarbon group having 1 to 12 carbon atoms, where 0 ≤ x < 0.4, 0.1 ≤ y ≤ 0.5, 0.4 ≤ z ≤ 0.8, and x + y + z = 1. The bonding order of each siloxane unit is not restricted.) It is represented as, and the total R in one molecule 3 Of which, organopolysiloxane having a proportion of monovalent aromatic hydrocarbon groups with 6 to 12 carbon atoms of 30 mol% to 100 mol%: 100 parts by mass (A-2) An epoxy resin having two or more epoxy groups in one molecule, one or more epoxy resins selected from the group consisting of triazine derivative epoxy resins, bisphenol type epoxy resins, hydrogenated bisphenol type epoxy resins, and alicyclic epoxy resins: 10 to 100 parts by mass (A-3) Acid anhydride-based curing agent: an amount such that the number of acid anhydride groups in component (A-3) is 0.3 to 1.0 for each epoxy group in components (A-1) and (A-2). (B) Zinc cyanurate: 0.1 to 10 parts by mass per 100 parts by mass of the prepolymer of component (A) above. (C) White pigment: 3 to 350 parts by mass per 100 parts by mass of the prepolymer of component (A) (excluding (B) zinc cyanurate), (D) Inorganic filler: 80 to 600 parts by mass per 100 parts by mass of the prepolymer of component (A) (excluding (B) zinc cyanurate and (C) white pigment): 0.1 to 10 parts by mass per 100 parts by mass of component (A), (E) Curing catalyst: 0.05 to 5 parts by mass per 100 parts by mass of the prepolymer of component (A), and (F) Antioxidant: 0.5 to 5 parts by mass per 100 parts by mass of the prepolymer of component (A) above. A thermosetting epoxy-silicone hybrid resin composition for white reflectors containing [a specific substance].

2. In formula (1) above, R 2 The thermosetting epoxy-silicone hybrid resin composition for white reflectors according to claim 1, wherein the group is represented by the following formula (2). 【Chemistry 2】 (In the formula, R' is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R 4 (It is a divalent hydrocarbon group having 1 to 20 carbon atoms.)

3. The thermosetting epoxy-silicone hybrid resin composition for a white reflector according to claim 1, wherein the (A-2) component is a triazine derivative epoxy resin.

4. The thermosetting epoxy-silicone hybrid resin composition for a white reflector according to claim 1, wherein the white pigment of component (C) is titanium oxide whose surface is treated with alumina, and then treated with one or more treatment agents selected from the group consisting of silica, alumina, zirconia, polyol, and siloxane.

5. The thermosetting epoxy-silicone hybrid resin composition for white reflectors according to claim 1, wherein the (F) component is a combination of a phenolic antioxidant and a phosphorus-based antioxidant.

6. An optoelectronic device comprising a cured product of the thermosetting epoxy-silicone hybrid resin composition for white reflectors described in claim 1.

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