UV-Curable Silicone Compositions And Anti-Dust Coating Compositions Containing Same

Patent metadata

Field	Value
Publication number	US-2016304724-A1
Application number	US-201415037063-A
Country	US
Kind code	A1
Filing date	Dec 22, 2014
Priority date	Dec 23, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

Provided in various embodiments are methods for making ultraviolet radiation curable (UV-curable) silicone compositions and the UV-curable silicone compositions prepared by such methods. Provided in various embodiments are methods for making anti-dust coatings using such UV-curable silicone compositions and the anti-dust coatings using such UV-curable silicone compositions prepared by such methods. The UV-curable silicone compositions may be used in the coating of silicone-based articles for LED packages, encapsulants, lamps, luminaires, optical articles and the like, substantially reducing and/or eliminating the pick-up of dust and improving optical properties of the silicone-based articles.

First claim

1 . A UV-curable silicone composition comprising:
(a) a silicone resin having the general formula:
((CH 3 ) 3 SiO 1/2 ) x [(RSiO 3/2 ) a (RR 1 SiO 2/2 ) b (RR 1 R 2 SiO 1/2 ) c ] y (SiO 4/2 ) z
wherein each R is an epoxy group, R 1 and R 2 are each independently an alkyl group or an aryl group, x, y, z>0, x+y+z=1, a+b+c=y,0≦a≦y,0≦b≦y, and 0≦c≦y; and (b) a cationic photoinitiator.

2 . The UV-curable silicone composition of claim 1 , wherein R is an epoxy group containing a three member oxirane ring selected from a 3-glycidoxypropyl group or a 2-(3,4-epoxycyclohexyl)ethyl group.

3 . The UV-curable silicone composition of any one of the preceding claims, wherein the UV-curable silicone composition is mixed with one or more epoxy monomers or polymers.

4 . The UV-curable silicone composition of any one of the preceding claims, wherein the UV-curable silicone composition includes a filler.

5 . A cured composition comprising the UV-curable silicone composition of any one of the preceding claims.

6 . A substrate coated with the cured composition of claim 5 , wherein the substrate is an optically clear silicone substrate.

7 . A method for preparing an anti-dust coating comprising spray coating, dip coating, or spin coating the UV-curable silicone composition according to any one of claims 1 - 4 on a surface of a substrate to form a liquid coating thereon, drying the liquid coating at room temperature, and curing the dried coating by ultraviolet radiation.

8 . An anti-dust coating prepared by the method of claim 7 .

9 . An article comprising the anti-dust coating of claim 8 , wherein the article is an LED package, encapsulant, lamp, luminaire, or optical article.

10 . A UV-curable silicone composition according to any one of claims 1 - 4 applied onto an optically clear substrate as an anti-dust coating to reduce dust attraction.

11 . A method of coating a substrate with an anti-dust coating comprising
a. applying the UV-curable silicone composition of any of claims 1 - 4 onto a substrate to form a liquid coating thereon, and b. curing the liquid coating to form the anti-dust coating, wherein the anti-dust coating has a pencil hardness greater than H.

12 . The method of claim 11 , wherein the substrate is an optically clear silicone substrate which is a silicone-based moldable LED encapsulant or a secondary optical article.

13 . The method of claim 12 , wherein the anti-dust coating has a higher hardness than a hardness of the optically clear silicone substrate.

14 . A method of forming a cured silicone anti-dust coating composition comprising:
(a) mixing a silicone resin having the general formula:
((CH 3 ) 3 SiO 1/2 ) x [(RSiO 3/2 ) a (RR 1 SiO 2/2 ) b (RR 1 R 2 SiO 1/2 ) c ] y (SiO 4/2 ) z
wherein each R is an epoxy group, R 1 and R 2 are each independently an alkyl group or an aryl group, x, y, z>0, x+y+z=1, a+b+c=y, 0≦a≦y, 0≦b≦y, and 0≦c≦y,
with a cationic photoinitiator to form a UV-curable silicone composition; and
(b) applying the UV-curable silicone composition onto a substrate to form a liquid coating thereon; and (c) curing the liquid coating by ultraviolet radiation to form the cured silicone anti-dust coating composition.

15 . The cured silicone anti-dust coating composition formed using the method of claim 14 .

Assignees

• Dow Corning

Inventors

• Fu Peng-Fei
• Moyer Eric
• Rong Wei

Classifications

• H10H20/0362

  of encapsulations · CPC title

• H10H20/036

  of packages · CPC title

• H10H20/034

  of coatings · CPC title

• H10H20/854

  characterised by their material, e.g. epoxy or silicone resins · CPC title

• H01L2933/0025

  Electricity · mapped topic