US 12,421,337 B2
Resin composition and cured film
Ya-Qian Chen, Taoyuan (TW); and Yu-Chun Chen, Taoyuan (TW)
Assigned to eChem Solutions Corp., Taoyuan (TW)
Filed by eChem Solutions Corp., Taoyuan (TW)
Filed on Sep. 28, 2022, as Appl. No. 17/955,504.
Claims priority of application No. 110136439 (TW), filed on Sep. 30, 2021.
Prior Publication US 2023/0107355 A1, Apr. 6, 2023
Int. Cl. C08F 220/68 (2006.01); C08F 222/10 (2006.01); C08K 3/22 (2006.01); C08L 35/02 (2006.01)
CPC C08F 220/68 (2013.01) [C08K 3/22 (2013.01); C08F 222/1025 (2020.02); C08K 2003/2241 (2013.01); C08K 2003/2244 (2013.01); C08L 35/02 (2013.01)] 6 Claims
 
1. A resin composition, comprising:
a monomer mixture (A), comprising a bisphenol fluorene compound (A-1) represented by Formula (I-1), a thiol compound (A-2) having two or more groups represented by Formula (I-2), and an ethylenically unsaturated group-containing compound (A-3) represented by Formula (I-3);
a siloxane compound (B), having a group represented by Formula (II-a);
a curing agent (C); and
inorganic particles (D), wherein

OG Complex Work Unit Chemistry
in Formula (I-1), R1 and R2 each independently represent a hydrogen atom or a methyl group, Y1 and Y2 each independently represent a substituted phenylene group, or an unsubstituted phenylene group, and m and n each independently represent an integer of 1 to 9,

OG Complex Work Unit Chemistry
in Formula (I-2), * represents a bonding position,

OG Complex Work Unit Chemistry
in Formula (I-3), R6 represents a hydrogen atom or a methyl group, and t is an integer of 1 to 3, and

OG Complex Work Unit Chemistry
in Formula (II-a), R3, R4, and R5 each independently represent an alkyl group having a carbon number of 1 to 3, and * represents a bonding position,
wherein based on 100 parts by weight of the monomer mixture (A), the bisphenol fluorene compound (A-1) is 35 parts by weight to 70 parts by weight, the thiol compound (A-2) is 11.1 parts by weight to 15 parts by weight, the ethylenically unsaturated group-containing compound (A-3) is 18.9 parts by weight to 50 parts by weight, and the siloxane compound (B) is 5 parts by weight to 20 parts by weight,
wherein a cured film formed of the resin composition has a refractive index of 1.61 or more for light having a wavelength of 550 nm, has an average transmittance of 95.1% or more for light having a wavelength of 400 nm to 700 nm, has a yellow-blue chromaticity difference of less than 1.0 after the cured film was placed in an oven at a temperature of 120° C. for 4 hours, and has no crack or breakage after the cured film is subjected to 75 heat-and-cold cycles,
wherein each of the cycles has the temperature increased from −35° C. to 75° C. and then decreased from 75° C. to −35° C.