CN109369855A - 一种聚氨酯变色镜片及其制备方法 - Google Patents
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Abstract
本发明公开了一种聚氨酯变色镜片及其制备方法,该镜片的原料包括:聚酯二醇、异佛尔酮二异氰酸酯、2,2‑二羟甲基丙酸、甲基丙烯酸甲酯、苯乙烯、引发剂、丙三醇、3‑巯基丙酸、甲苯、对甲苯磺酸、光致变色材料、UV吸收剂。其制备方法是先将丙三醇、3‑巯基丙酸、甲苯、对甲苯磺酸混合反应制成固化剂;然后将聚酯二醇、异佛尔酮二异氰酸酯、2,2‑二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合后加入固化剂、光致变色材料和UV吸收剂,搅拌制成混合浆料;将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化、二次固化,即得。所制得的镜片具有优异的变色性能和力学性能,可广泛应用。
Description
技术领域
本发明属于树脂镜片技术领域,具体涉及一种聚氨酯变色镜片及其制备方法。
背景技术
变色镜片是指在紫外光线照射下颜色会变深的光学镜片,也称为光致变色镜片。根据相关调查显示,目前有超过90%与紫外线辐射相关的皮肤癌是发生在颈部以上的区域,过度暴露于紫外线中眼皮和眼睛周围皮肤有可能导致癌症。除了皮肤癌之外,紫外线辐射还会提高白内障、黄斑变性等多种眼部问题的危险,并会导致免疫系统的破坏。因此,合成变色材料制成变色镜片并且大量推广具有现实意义。
随着社会的发展,各方面对光学塑料的要求存在一定的差异,所以传统的光学塑料在应用方面受到了越来越多的限制。尤其是在制备光学眼镜方面,光学眼镜要求光学塑料有较大的折射率以及较低的色散。相同的折射能力,材料的折光指数越大,则镜片越薄、重量更轻,所以高折光指数光学树脂是目前研究的最主要方向,与此同时,聚氨酯光学树脂的研究大范围开展。
发明内容
本发明的目的是提供一种聚氨酯变色镜片及其制备方法,所制得的镜片性能优异,可广泛应用。
一种聚氨酯变色镜片,原料以重量份计包括:聚酯二醇2-6份,异佛尔酮二异氰酸酯1-4份,2,2-二羟甲基丙酸2-5份,甲基丙烯酸甲酯8-12份,苯乙烯5-10份,引发剂0.5-1份,丙三醇0.8-1.5份,3-巯基丙酸0.5-1.2份,甲苯3-7份,对甲苯磺酸0.5-1份,光致变色材料0.3-0.6份,UV吸收剂0.1-0.3份。
进一步地,所述引发剂为偶氮二异庚腈。
进一步地,所述光致变色材料为螺吡喃类、螺噁嗪类、偶氮苯类、二芳基乙烯类中的一种或几种。
进一步地,所述UV吸收剂为二苯甲酮类、苯并三唑类或吲哚类中的一种或几种。
上述聚氨酯变色镜片的制备方法,包括以下步骤:
步骤1,将丙三醇、3-巯基丙酸、甲苯、对甲苯磺酸混合,在110-120℃回流反应1-2h,经减压蒸馏得到固化剂;
步骤2,将聚酯二醇、异佛尔酮二异氰酸酯、2,2-二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合均匀,加热至45-55℃,加入固化剂、光致变色材料和UV吸收剂,搅拌,得到混合浆料;
步骤3,将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化;一次固化结束后,开模、倒边、清洗,然后放入空气固化炉中进行二次固化,即得。
进一步地,一次固化和二次固化的温度为60-100℃。
本发明制得的镜片可见光透视比≥93%,蓝紫光透视比分别为波段280nm-380nm≤0.5%,380nm-420nm≤20%,力学性能优异,可广泛应用。
具体实施方式
实施例1
一种聚氨酯变色镜片,原料以重量份计包括:聚酯二醇2份,异佛尔酮二异氰酸酯1份,2,2-二羟甲基丙酸2份,甲基丙烯酸甲酯8份,苯乙烯5份,引发剂0.5份,丙三醇0.8份,3-巯基丙酸0.5份,甲苯3份,对甲苯磺酸0.5份,光致变色材料0.3份,UV吸收剂0.1份。
其中,所述引发剂为偶氮二异庚腈。
所述光致变色材料为螺吡喃类。
所述UV吸收剂为二苯甲酮类。
上述聚氨酯变色镜片的制备方法,包括以下步骤:
步骤1,将丙三醇、3-巯基丙酸、甲苯、对甲苯磺酸混合,在110℃回流反应2h,经减压蒸馏得到固化剂;
步骤2,将聚酯二醇、异佛尔酮二异氰酸酯、2,2-二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合均匀,加热至45℃,加入固化剂、光致变色材料和UV吸收剂,搅拌,得到混合浆料;
步骤3,将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化,固化温度为60-100℃;一次固化结束后,开模、倒边、清洗,然后放入空气固化炉中进行二次固化,固化温度为60-100℃,即得。
经检测,所制备得到的镜片,原始投射比为93.5%,在280nm-380nm的透射比≤0.1%、380nm-420nm的透射比≤9.5%,抗冲击性能为15KJ/m2。
实施例2
一种聚氨酯变色镜片,原料以重量份计包括:聚酯二醇4份,异佛尔酮二异氰酸酯2份,2,2-二羟甲基丙酸3份,甲基丙烯酸甲酯10份,苯乙烯7份,引发剂0.7份,丙三醇1.2份,3-巯基丙酸0.9份,甲苯5份,对甲苯磺酸0.8份,光致变色材料0.5份,UV吸收剂0.2份。
其中,所述引发剂为偶氮二异庚腈。
所述光致变色材料为螺噁嗪类。
所述UV吸收剂为苯并三唑类。
上述聚氨酯变色镜片的制备方法,包括以下步骤:
步骤1,将丙三醇、3-巯基丙酸、甲苯、对甲苯磺酸混合,在110℃回流反应1h,经减压蒸馏得到固化剂;
步骤2,将聚酯二醇、异佛尔酮二异氰酸酯、2,2-二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合均匀,加热至50℃,加入固化剂、光致变色材料和UV吸收剂,搅拌,得到混合浆料;
步骤3,将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化,固化温度为60-100℃;一次固化结束后,开模、倒边、清洗,然后放入空气固化炉中进行二次固化,固化温度为60-100℃,即得。
经检测,所制备得到的镜片,原始投射比为93.7%,在280nm-380nm的透射比≤0.1%、380nm-420nm的透射比≤9.5%,抗冲击性能为16KJ/m2。
实施例3
一种聚氨酯变色镜片,原料以重量份计包括:聚酯二醇6份,异佛尔酮二异氰酸酯4份,2,2-二羟甲基丙酸5份,甲基丙烯酸甲酯12份,苯乙烯10份,引发剂1份,丙三醇1.5份,3-巯基丙酸1.2份,甲苯7份,对甲苯磺酸1份,光致变色材料0.6份,UV吸收剂0.3份。
其中,所述引发剂为偶氮二异庚腈。
所述光致变色材料为螺吡喃类。
所述UV吸收剂为二苯甲酮类。
上述聚氨酯变色镜片的制备方法,包括以下步骤:
步骤1,将丙三醇、3-巯基丙酸、甲苯、对甲苯磺酸混合,在120℃回流反应1h,经减压蒸馏得到固化剂;
步骤2,将聚酯二醇、异佛尔酮二异氰酸酯、2,2-二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合均匀,加热至55℃,加入固化剂、光致变色材料和UV吸收剂,搅拌,得到混合浆料;
步骤3,将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化,固化温度为60-100℃;一次固化结束后,开模、倒边、清洗,然后放入空气固化炉中进行二次固化,固化温度为60-100℃,即得。
经检测,所制备得到的镜片,原始投射比为93.6%,在280nm-380nm的透射比≤0.1%、380nm-420nm的透射比≤9.5%,抗冲击性能为15KJ/m2。
Claims (6)
1.一种聚氨酯变色镜片,其特征在于:原料以重量份计包括:聚酯二醇2-6份,异佛尔酮二异氰酸酯1-4份,2,2-二羟甲基丙酸2-5份,甲基丙烯酸甲酯8-12份,苯乙烯5-10份,引发剂0.5-1份,丙三醇0.8-1.5份,3-巯基丙酸0.5-1.2份,甲苯3-7份,对甲苯磺酸0.5-1份,光致变色材料0.3-0.6份,UV吸收剂0.1-0.3份。
2.根据权利要求1所述的聚氨酯变色镜片,其特征在于:所述引发剂为偶氮二异庚腈。
3.根据权利要求1所述的聚氨酯变色镜片,其特征在于:所述光致变色材料为螺吡喃类、螺噁嗪类、偶氮苯类、二芳基乙烯类中的一种或几种。
4.根据权利要求1所述的聚氨酯变色镜片,其特征在于:所述UV吸收剂为二苯甲酮类、苯并三唑类或吲哚类中的一种或几种。
5.权利要求1所述的聚氨酯变色镜片的制备方法,其特征在于:包括以下步骤:
步骤1,将丙三醇、3-巯基丙酸、甲苯、对甲苯磺酸混合,在110-120℃回流反应1-2h,经减压蒸馏得到固化剂;
步骤2,将聚酯二醇、异佛尔酮二异氰酸酯、2,2-二羟甲基丙酸加至甲基丙烯酸甲酯和苯乙烯的混合溶液中,混合均匀,加热至45-55℃,加入固化剂、光致变色材料和UV吸收剂,搅拌,得到混合浆料;
步骤3,将混合浆料浇注到模具中,把模具放入空气固化炉中进行一次固化;一次固化结束后,开模、倒边、清洗,然后放入空气固化炉中进行二次固化,即得。
6.根据权利要求5所述的聚氨酯变色镜片的制备方法,其特征在于:一次固化和二次固化的温度为60-100℃。
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