申请人:Tokai Optical Co., Ltd.
公开号:US20180134872A1
公开(公告)日:2018-05-17
To provide a plastic lens which can absorb light with a wavelength of 400 to 420 nm with sufficiently high efficiency but is reduced in the absorption of light with a wavelength of around 420 nm or longer, is less affected by harmful light, suppresses yellow coloration and therefore has excellent appearance, suppresses yellowish discoloration over time, and has excellent heat resistance, light resistance, and also optical performance, particularly an excellent Abbe's number.
The plastic lens is characterized by containing an ultraviolet absorbing agent represented by the following formula (I):
(in the formula, R
1
to R
8
each independently represent a monovalent group such as a hydrogen atom, R
9
represents a monovalent sulfur-containing group represented by the following formula (i):
(in the formula, R
10
represents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; R
11
represents a divalent hydrocarbon group with 1 to 20 carbon atoms or the like; R
12
represents a monovalent hydrocarbon group with 1 to 20 carbon atoms; the total number of carbon atoms in R
10
, n number of R
11
, and R
12
is 30 or less; m represents an integer of 0 or 1; and n represents an integer of 0 to 3)), and a resin material.
提供一种塑料镜片,可以高效吸收波长为400至420纳米的光线,但在吸收波长约为420纳米或更长的光线时减少吸收,对有害光线的影响较小,抑制黄色变色,从而具有出色的外观,随着时间的推移抑制黄色变色,并具有出色的耐热性、耐光性以及光学性能,特别是出色的阿贝数。该塑料镜片的特征在于含有以下式(I)所代表的紫外线吸收剂:(在公式中,R1至R8分别表示氢原子等单价基团,R9表示由以下式(i)所代表的含硫单价基团:(在公式中,R10表示含有1至20个碳原子的二价碳氢基团或类似基团;R11表示含有1至20个碳原子的二价碳氢基团或类似基团;R12表示含有1至20个碳原子的单价碳氢基团;R10、R11和R12的碳原子总数不超过30;m表示0或1的整数;n表示0至3的整数)),以及树脂材料。