US 12,130,449 B2
Anti-blue light anti-infrared resin lens with refractivity of 1.50 and preparation method thereof
Chuanbao Wang, Nantong (CN); Qingbo Yan, Nantong (CN); Jian Huang, Nantong (CN); and Liangliang Shi, Nantong (CN)
Assigned to Jiangsu Conant Optical Co., Ltd., Nantong (CN); and Shanghai Conant Optical Co., Ltd., Shanghai (CN)
Filed by Jiangsu Conant Optical Co., Ltd., Nantong (CN); and Shanghai Conant Optical Co., Ltd., Shanghai (CN)
Filed on May 10, 2021, as Appl. No. 17/316,479.
Application 17/316,479 is a continuation in part of application No. PCT/CN2020/088781, filed on May 6, 2020.
Claims priority of application No. 201911244159.7 (CN), filed on Dec. 6, 2019.
Prior Publication US 2021/0263197 A1, Aug. 26, 2021
Int. Cl. G02B 1/00 (2006.01); B29C 39/00 (2006.01); B29C 39/38 (2006.01); B29D 11/00 (2006.01); G02B 1/04 (2006.01); G02B 3/00 (2006.01); B29K 69/00 (2006.01); B29K 105/00 (2006.01)
CPC G02B 3/0031 (2013.01) [B29C 39/006 (2013.01); B29C 39/38 (2013.01); B29D 11/00442 (2013.01); G02B 1/007 (2013.01); G02B 1/041 (2013.01); B29C 2791/002 (2013.01); B29K 2069/00 (2013.01); B29K 2105/0002 (2013.01); B29K 2909/08 (2013.01); B29K 2995/0031 (2013.01)] 6 Claims
 
1. An anti-blue light anti-infrared resin lens with refractive index of 1.50, comprising 100 parts by weight of diethylene glycol bis-allycarbonate, 1-3 parts by weight of an initiator, and 2.216-19.31 parts by weight of an additive, wherein the additive comprises an anti-infrared absorber, a blue light absorber, and a hardness modifier at a weight ratio of 0.001-0.3:0.01-5:2-8, and the initiator is benzoyl peroxide, dicumyl peroxide, or 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane; wherein
the additive further comprises a dyeing modifier, the weight ratio of the dyeing modifier to the diethylene glycol bis-allycarbonate is 0.0001-0.1:100, and the dyeing modifier is a siloxane-based leveling and dispersing agent;
wherein the anti-blue light anti-infrared resin lens is prepared by the following steps:
(1) mixing of materials, comprising: pre-dissolving the blue light absorber in the diethylene glycol bis-allycarbonate heated to 40-55° C., cooling to a normal temperature over half an hour, then sequentially adding the anti-infrared absorber, the hardness modifier and the dyeing modifier, and finally adding an initiator and mixing for 1-2 hrs under vacuum;
(2) pouring of materials, comprising: filtering the uniformly mixed materials in the step (1) and then pouring into a glass mold, and sealing;
(3) primary curing, comprising: positioning the mold with poured materials in the step (2) in a curing furnace for primary curing and forming, wherein the curing time vs temperature curve comprises: an initial temperature of 25-30° C., heating up to 60-65° C. over 1 hr, then heating up to 80-85° C. over 1 hr and holding at 80-85° C. for 20 hrs, heating up to 90-95° C. over 16 hrs, heating up to 100-105° C. over 3 hrs, and then cooling to 75-80° C. over 0.5 hr;
(4) releasing from the mold, edging, and cleaning;
(5) secondary curing, comprising: positioning the cleaned lens in the curing oven again for secondary curing at a curing temperature of 105-110° C., for a time of 2-2.5 hrs; and
(6) standing the lens after secondary curing in a dyeing tank and dying at 85-95° C. for half an hour;
wherein the anti-blue light anti-infrared resin lenses has an absorption rate of 50-90% in a near-infrared range of 760-1400 nm, an anti-blue light indicated by a band pass rate being less than 1% at 410 nm, a blue light absorption rate of 10-30% in a range of 380-500 nm, and a visible light transmittance with 15-16%.