CN104327237A - 一种防蓝光树脂镜片及其制备工艺 - Google Patents
一种防蓝光树脂镜片及其制备工艺 Download PDFInfo
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- CN104327237A CN104327237A CN201410531867.XA CN201410531867A CN104327237A CN 104327237 A CN104327237 A CN 104327237A CN 201410531867 A CN201410531867 A CN 201410531867A CN 104327237 A CN104327237 A CN 104327237A
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Abstract
本发明公开了一种防蓝光树脂镜片,由三类化学组分A、B、C混合后引发催化的聚合反应,所述组分A:B:C的质量比为30-50:20-50:0.1-1,其中,所述A组分为多异氰酸酯化合物,所述B组分为硫醇,所述C组分为吲哚类或苯并三唑类化合物。本发明防蓝光树脂镜片通过选择一些由特殊结构且光学性能好的各种化学单体,加入合适的催化剂,通过计算机程序升温技术,制定出相应的成镜工艺技术,制备出折射率为1.55-1.67的强韧性系列防蓝光树脂镜片。同时,增加了镜片的功能,使得镜片能不同程度的吸收可见光中有害的蓝紫光,从而达到保护人眼的作用,为弱视群体发明一种舒适而又安全的的眼镜。
Description
技术领域
本发明涉及一种树脂镜片及其制备工艺。
背景技术
蓝光,是一种波长为400-500nm的高能可见光,它对人类眼睛的巨大伤害已经成为世界眼科学界的一项普遍常识。生活中蓝光的无处不在,人类活动使得大气臭氧层的减薄,太阳辐射的蓝光增强,各种荧光灯,LED照明产品、显示屏、投影,液晶屏(电脑、手机等)、浴霸、激光笔、各种数码产品等。这些都称为是“视力殺手”。根据研究证据显示,波长为400nm~480nm蓝光容易损伤眼睛,且蓝光可穿透角膜、晶体,到达视网膜。在可见光中以400~500nm的短波长蓝光对视网膜的损伤最为严重。Putting等分别比较了400~500nm蓝光和510~740nm黄光照射兔眼所需的强度,结果显示造成同样程度视网膜功能损害所需蓝光的强度仅是黄光的l/30。蓝光主要对视网膜中的一种色素起损害作用,这种色素只蓄积在视网膜细胞中,细胞中的这种色素分子,对蓝光区域的光辐射吸收作用非常强。人类如果长期在蓝光污染的环境里生活,会对神经细胞(视神经)与大脑细胞造成伤害,神经反应减弱;干扰生物钟;减缓新陈代谢,影响免疫系统的正常恢复。蓝光可刺激大脑,抑制褪黑素分泌,并提高肾上腺皮质激素的生成,从而破坏激素分泌平衡。研究发现,睡眠不足或睡眠质量低的人免疫功能、反应力、记忆力和协调能力明显下降,患糖尿病、心脏病、癌症、肥胖、消化不良、便秘、抑郁症等疾病的几率增大。蓝光射入眼底经过聚焦后,焦点落在视网膜与晶状体之间,加剧色差和视觉模糊度。可见光线在眼内聚焦点不同,这就增大了光线在眼内聚焦的色差距离,所以蓝光的射入会加据色差的视觉模糊度,从而导致视疲劳。在一定的波长范围内,视网膜光化学损伤的敏感性随着光波波长的缩短而呈对数关系上升。在可见光中以400~500nm的短波长蓝光对视网膜的损伤最为严重,其会导致视网膜退化,易破坏视网膜功能甚至视网膜脱落;引发多种疾病。大量未过滤的蓝光会加速视网膜黄斑区的细胞氧化,是引起视网膜黄斑病变的主要原因之一。动物与人皮肤内、眼球的色素可以吸收紫外线、蓝紫光等短波光线,能避免对皮下组织和眼睛的伤害。人们随着年龄的增长,这种有效色素随之减少,特别是眼球的色素减少明显,白色人种尤其明显。本技术采用人工合成添加剂,加入树脂镜片中,能有效地阻挡与吸收紫外线、蓝紫光,避免蓝光对人眼、对视神经与大脑的伤害,缓解眼胀、酸涩、刺痛等现象,降低疲惫劳累,保持眼睛湿润、提高视物的对比度与色彩辨识度,增加视觉耐久力与集中力。调节色素的添加量,能调节防蓝的能力的大小。
随着当今科技新月异的发展,人类进入信息化时代,无论学习方式、工作方式、生活方式都发生了重大变化。这其中对视觉的依赖程度越来越高,视觉的负担越来越重。而电脑、电视,显示屏的蓝光辐射成分高,对视细胞的伤害大,并且是一个不断变化的光辐射源。另外,节能电光源的光辐射也包含了有害蓝光辐射,在给人们带来益处的同时,也在无形中伤害了人眼的健康。长时间处于这种环境中,人易产生视疲劳,不但眼部调节力下降、视物模糊,而且伴随着头疼、头晕、恶心、呕吐和心情焦虑、烦躁以及其他神经官能症等症状。在越来越重视健康的今天,如何保护眼睛将受到人们更多的重视。
发明内容
本发明要解决的技术问题是克服现有的缺陷,提供了一种折射率为1.55-1.67的强韧性系列的防蓝光树脂镜片;
本发明的另一目的是提供上述防蓝光树脂镜片的制备方法。
本发明的目的通过以下技术方案来具体实现:
一种防蓝光树脂镜片,由三类化学组分A、B、C混合后引发催化的聚合反应,所述组分A:B:C的质量比为30-50:20-50:0.1-1,其中,所述A组分为多异氰酸酯化合物,所述B组分为硫醇,所述C组分为吲哚类或苯并三唑类化合物。
优选的,所述A组分为2,5-双(异氰酸酯基甲基)双环[2,2,1]庚烷、六亚甲基-1,6二异氰酸酯、异佛尔酮二异氰酸酯、1,3-二(异氰酸酯基甲基)苯、二环己基甲烷-4,4,-二二异氰酸酯、六亚甲基-1,6二异氰酸酯三聚体或甲苯二异氰酸。
优选的,所述B组分为是巯乙基硫醚、巯乙基巯丙基硫醚、1,2-二[(2-巯基乙基)硫]-3-巯基丙烷、1,4-二噻烷-2-甲硫醇、1,4-二噻烷-2-甲硫基乙硫醇、2,5-二甲基巯基-1,4-二噻烷、季戊四醇四-3-巯基丙酸酯、季戊四醇三-3-巯基丙酸酯、季戊四醇二-3-巯基丙酸酯、季戊四醇-3-丙酸酯或硫代丙三醇。
优选的,
所述C组分为吲哚类化合物时,采用结构式如Ⅰ的化合物:
R1=CH3,;CH3CH2;CH(CH)2,
R2=CH3CH2CH2CH2O;CH3CH2CH2O;OCH(CH3)2;CH3O;
所述C组分为苯并三唑类化合物时,采用结构式如Ⅱ的化合物:
X=H、Cl,
R1=—CH3、—CH2CH3、—CH(CH3)2、—C(CH3)3,
R2=—CH3、—CH(CH3)2、—C(CH3)3。
更优的,A组分采用六亚甲基-1,6二异氰酸酯和异佛尔酮二异氰酸酯;B组分采用季戊四醇四-3-巯基丙酸酯和巯乙基巯丙基硫醚;C组分采用4-氯-1-(2-羟基-3,5-二叔丁基)苯并三唑;所述六亚甲基-1,6二异氰酸酯:异佛尔酮二异氰酸酯:季戊四醇四-3-巯基丙酸酯:巯乙基巯丙基硫醚:4-氯-1-(2-羟基-3,5-二叔丁基)苯并三唑的重量比为20:30:40:10:1。
上述的防蓝光树脂镜片的制备工艺,包括如下步骤:
1)单体混合:
按比例称取组分A、组分C,在常温下搅拌均匀,加入少量内部脱模剂和催化剂,在常温下真空搅拌30~60min,使得C组分完全溶解,放入冰水浴,继续真空搅拌后降温到10℃±2℃;加入B组分,在冰水浴中真空搅拌45~60min后停止搅拌,冰水浴中真空静止30~45min;
2)固化成镜:
氮气施压,混合单体经过过滤膜注入已准备的模具中,注入完毕,把装有混合单体的模具放入固化炉中进行热固化成镜;
3)二次固化:
热固化结束,进行出炉、开模、切边、清洗后,镜片进行二次固化。
进一步的,所述步骤1)中,真空度为-0.08-0.09Mpa,所述催化剂为二丁基二氯化锡。
进一步的,所述步骤2)中,所述过滤膜的孔径为1~3μm,氮气施压的压强为0.05~0.09Mpa。
进一步的,所述步骤2)中的固化热固化温度曲线及固化时间如下:
折射率为1.56的固化曲线及固化时间为:
28℃2.0hr 35℃4.0hr 50℃3.0hr 70℃3.0hr 80℃6.0hr 130℃2.0hr 130℃1.0hr70℃1.0hr 70℃,共需22个小时;
折射率为1.60的固化曲线及固化时间为:
30℃6hr.40℃3hr.50℃2hr.65℃3hr.95℃1hr.120℃4hr.120℃1hr.70℃,共需21个小时;
折射率为1.67的固化曲线及固化时间:
30℃4.5hr.30℃5hr.60℃3hr.90℃0.5hr.100℃0.5hr.120℃2hr.120℃1hr.70℃,共需16.5个小时。
进一步的,所述步骤3)中,二次固化过程,采用在温度120~130℃保持2~3小时。
两次固化后的镜片即可进入下道工序即加硬镀膜。最后对成品进行检验,除了对镜片其它指标的测量外,重点进行抗冲击测试(中心厚度一般为1.2~1.6mm)、可见光及蓝光透过率试验。
本发明的有益效果:
本发明防蓝光树脂镜片通过选择一些由特殊结构且光学性能好的各种化学单体,加入合适的催化剂,通过计算机程序升温技术,制定出相应的成镜工艺技术,制备出折射率为1.55-1.67的强韧性系列防蓝光树脂镜片。同时,增加了镜片的功能,使得镜片能不同程度的吸收可见光中有害的蓝紫光,从而达到保护人眼的作用,为弱视群体发明一种舒适而又安全的的眼镜。
具体实施方式
以下对本发明的优选实施例进行说明,应当理解,此处所描述的优选实施例仅用于说明和解释本发明,并不用于限定本发明。
模具准备:根据生产要求,把需要的模具强化处理,清洗干净,合模待用。
以下各实施例采用的催化剂均为二丁基二氯化锡。
实施实例1:
称取A组分中的六亚甲基-1,6二异氰酸酯2kg、异佛尔酮二异氰酸酯3kg,C组分中的4-氯-1-(2-羟基-3,5-二叔丁基)苯并三唑100g,在常温下搅拌均匀,加入催化剂12g,脱模剂8g,在常温(25±3℃)下真空搅拌30min~60min,使得C组分完全溶解,放入冰水浴,继续真空搅拌后降温到10℃左右。加入B组分中的季戊四醇四-3-巯基丙酸酯4Kg,巯乙基巯丙基硫醚1Kg,在冰水浴中真空搅拌45min后停止搅拌,冰水浴中静止真空40min,氮气施压,过滤后,注入已准备的模具;混合单体经过过滤膜注入已准备的模具中,注入完毕,放入固化炉中,采用折射率为1.56的固化曲线固化成镜。热固化结束,进行出炉、开模、清洗后,镜片进行二次固化,两次固化后的镜片进入下道工序即加硬镀膜。最后对成品进行检验,得到的镜片折射率为:1.556,抗冲击试验结果为:67g钢球从2米高度自由落下,连续三次无裂缝或碎屑(镜片中心厚度为1.50mm),可见光透过率为92%,在波长为415nm下,蓝光的透过率为1.5%
实施实例2:
称取A组分中的二环己基甲烷-4,4,-二二异氰酸酯3.5kg、六亚甲基-1,6二异氰酸酯1.3kg、C组分中的4-氯-1-(2-羟基-3-异丙基-5-叔丁基)苯并三唑80g,2-氰基-3-(1-甲基-2-苯基-1-氢-3-吲哚)-2-丙烯酸乙酯20g,在常温下搅拌均匀,加入催化剂15g,脱模剂8g,在常温(25±3℃)下真空搅拌30min~60min,使得C组分完全溶解,放入冰水浴,继续真空搅拌后降温到10℃左右。加入B组分中的季戊四醇四-3-巯基丙酸酯2Kg,1,2-二【(2-巯基乙基)硫】-3-巯基丙烷3.2Kg,在冰水浴中真空搅拌45min后停止搅拌,冰水浴中静止真空40min,氮气施压,过滤后,注入已准备的模具;混合单体经过过滤膜注入已准备的模具中,注入完毕,放入固化炉中,采用折射率为1.60的固化曲线固化成镜。热固化结束,进行出炉、开模、清洗后,镜片进行二次固化,两次固化后的镜片进入下道工序即加硬镀膜。最后对成品进行检验,得到的镜片折射率为:1.598,抗冲击试验结果为:67g钢球从2米高度自由落下,连续三次无裂缝或碎屑(镜片中心厚度为1.46mm),可见光透过率为91%,在波长为420nm下,蓝光的透过率为2%
实施实例3:
称取A组分中的1,3-二(异氰酸酯基甲基)苯4kg,、六亚甲基-1,6二异氰酸酯1kg,,C组分中的2-氰基-3-(1-甲基-2-苯基-1-氢-3-吲哚)-2-丙烯酸乙酯120g,在常温下搅拌均匀,加入催化剂15g,脱模剂8g,在常温(25±3℃)下真空搅拌30min~60min,使得C组分完全溶解,放入冰水浴,继续真空搅拌后降温到10℃左右。加入B组分中的1,2-二【(2-巯基乙基)硫】-3-巯基丙烷3.5Kg,巯乙基硫醚1.5Kg,在冰水浴中真空搅拌45min后停止搅拌,冰水浴中静止真空40min,氮气施压,过滤后,注入已准备的模具;混合单体经过过滤膜注入已准备的模具中,注入完毕,放入固化炉中,采用折射率为1.67的固化曲线固化成镜。热固化结束,进行出炉、开模、清洗后,镜片进行二次固化,两次固化后的镜片进入下道工序即加硬镀膜。最后对成品进行检验,得到的镜片折射率为:1.667,抗冲击试验结果为:32g钢球从2米高度自由落下,连续三次无裂缝或碎屑(镜片中心厚度为1.5mm),可见光透过率为92%,在波长为430nm下,蓝光的透过率为1.8%。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种防蓝光树脂镜片,其特征在于:由三类化学组分A、B、C混合后引发催化的聚合反应,所述组分A:B:C的质量比为30-50:20-50:0.1-1,其中,所述A组分为多异氰酸酯化合物,所述B组分为硫醇,所述C组分为吲哚类或苯并三唑类化合物。
2.根据权利要求1所述的防蓝光树脂镜片,其特征在于:所述A组分为2,5-双(异氰酸酯基甲基)双环[2,2,1]庚烷、六亚甲基-1,6二异氰酸酯、异佛尔酮二异氰酸酯、1,3-二(异氰酸酯基甲基)苯、二环己基甲烷-4,4,-二二异氰酸酯、六亚甲基-1,6二异氰酸酯三聚体或甲苯二异氰酸。
3.根据权利要求1所述的防蓝光树脂镜片,其特征在于:所述B组分为是巯乙基硫醚、巯乙基巯丙基硫醚、1,2-二[(2-巯基乙基)硫]-3-巯基丙烷、1,4-二噻烷-2-甲硫醇、1,4-二噻烷-2-甲硫基乙硫醇、2,5-二甲基巯基-1,4-二噻烷、季戊四醇四-3-巯基丙酸酯、季戊四醇三-3-巯基丙酸酯、季戊四醇二-3-巯基丙酸酯、季戊四醇-3-丙酸酯或硫代丙三醇。
4.根据权利要求1所述的防蓝光树脂镜片,其特征在于:
所述C组分为吲哚类化合物时,采用结构式如Ⅰ的化合物:
R1=CH3,;CH3CH2;CH(CH)2,
R2=CH3CH2CH2CH2O;CH3CH2CH2O;OCH(CH3)2;CH3O;
所述C组分为苯并三唑类化合物时,采用结构式如Ⅱ的化合物:
X=H、Cl,
R1=—CH3、—CH2CH3、—CH(CH3)2、—C(CH3)3,
R2=—CH3、—CH(CH3)2、—C(CH3)3。
5.根据权利要求1所述的防蓝光树脂镜片,其特征在于:
A组分采用六亚甲基-1,6二异氰酸酯和异佛尔酮二异氰酸酯;
B组分采用季戊四醇四-3-巯基丙酸酯和巯乙基巯丙基硫醚;
C组分采用4-氯-1-(2-羟基-3,5-二叔丁基)苯并三唑;
所述六亚甲基-1,6二异氰酸酯:异佛尔酮二异氰酸酯:季戊四醇四-3-巯基丙酸酯:巯乙基巯丙基硫醚:4-氯-1-(2-羟基-3,5-二叔丁基)苯并三唑的重量比为20:30:40:10:1。
6.根据权利要求1所述的防蓝光树脂镜片的制备工艺,其特征在于:包括如下步骤:
1)单体混合:
按比例称取组分A、组分C,在常温下搅拌均匀,加入少量内部脱模剂和催化剂,在常温下真空搅拌30~60min,使得C组分完全溶解,放入冰水浴,继续真空搅拌后降温到10℃±2℃;加入B组分,在冰水浴中真空搅拌45~60min后停止搅拌,冰水浴中真空静止30~45min;
2)固化成镜:
氮气施压,混合单体经过过滤膜注入已准备的模具中,注入完毕,把装有混合单体的模具放入固化炉中进行热固化成镜;
3)二次固化:
热固化结束,进行出炉、开模、切边、清洗后,镜片进行二次固化。
7.根据权利要求6所述的防蓝光树脂镜片的制备工艺,其特征在于:所述步骤1)中,真空度为-0.08-0.09Mpa,所述催化剂为二丁基二氯化锡。
8.根据权利要求6所述的防蓝光树脂镜片的制备工艺,其特征在于:所述步骤2)中,所述过滤膜的孔径为1~3μm,氮气施压的压强为0.05~0.09Mpa。
9.根据权利要求6所述的防蓝光树脂镜片的制备工艺,其特征在于:所述步骤2)中的固化热固化温度曲线及固化时间如下:
折射率为1.56的固化曲线及固化时间为:
28℃2.0hr35℃4.0hr50℃3.0hr70℃3.0hr80℃6.0hr130℃2.0hr130℃1.0hr70℃1.0hr70℃,共需22个小时;
折射率为1.60的固化曲线及固化时间为:
30℃6hr.40℃3hr.50℃2hr.65℃3hr.95℃1hr.120℃4hr.120℃1hr.70℃,共需21个小时;
折射率为1.67的固化曲线及固化时间:
30℃4.5hr.30℃5hr.60℃3hr.90℃0.5hr.100℃0.5hr.120℃2hr.120℃1hr.70℃,共需16.5个小时。
10.根据权利要求6所述的防蓝光树脂镜片的制备工艺,其特征在于:所述步骤3)中,二次固化过程,采用在温度120~130℃保持2~3小时。
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