CN114453226A - 一种聚氨酯防腐耐磨热熔铝箔复合制备方法 - Google Patents
一种聚氨酯防腐耐磨热熔铝箔复合制备方法 Download PDFInfo
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Abstract
本发明以聚醚多元醇和二异氰酸酯混合,升温后加入催化剂,通过逐步聚合反应形成聚氨酯乳液,作为热熔胶涂覆在铝箔表面,充分干燥后,得到热熔铝箔,本发明热熔铝箔表面的聚氨酯,能有效提高铝箔的粘附力,并能提高铝箔防腐和耐磨性能,还能在铝箔发生弯曲时起到一定的缓冲作用,减少铝箔由于弯曲而形成的裂口、折皱等缺陷。本发明制得的聚氨酯热熔铝箔具有优良的耐磨性、耐腐蚀性以及耐折性,抗破裂性能好,不易发生裂口、折皱等缺陷,屏蔽性能好,质量稳定,应用范围广。
Description
技术领域
本发明涉及材料技术领域,具体地说尤其涉及一种聚氨酯防腐耐磨热熔铝箔复合制备方法。
背景技术
铝箔是由铝或铝合金板材压延而成的一种很薄的材料,表面呈银白色的金属光泽,具有质量轻、质地柔软、延展性,加工适应性好、耐高温、低温性能优良、阻隔性高、保护性强、无毒无味等优点。被广泛的应用于包装材料、阻隔材料和印刷材料等领域。
然而,铝箔同时具有拉伸强度不高、耐撕裂性差,折叠时容易发生裂口、折皱等缺点。铝箔的耐磨性、耐腐蚀性能相对较低,并且铝箔和铝一样容易因氧化,这些问题都会导致铝箔的阻隔性容易发生破坏,从而限制了铝箔的应用范围。为了克服以上缺点,有必要对现有铝箔的制备方法做出相应的改进,以提高其综合性能。聚氨酯热熔胶具有附着力好的特点,并且具有耐腐蚀、抗划伤等优点。
发明内容
本发明的目的在于提出一种聚氨酯防腐耐磨热熔铝箔复合制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明通过如下技术手段实现:
一种聚氨酯防腐耐磨热熔铝箔复合制备方法,通过以下步骤实现:
步骤1:在60~80℃温度下将聚醚多元醇和二异氰酸酯混合,加入催化剂,催化剂含量为0.1~0.5wt%,磁力搅拌1~3h,得到聚氨酯预聚体;
步骤2:在60~80℃温度下向聚氨酯预聚体中加入封端剂,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,于80~120℃干燥处理0.5~2h,冷却、收卷,得到聚氨酯热熔铝箔。
进一步地,步骤1中的聚醚多元醇为聚丙二醇(PPG)、聚四氢呋喃二醇(PTMG)和四氢呋喃-氧化丙烯共聚二醇中的一种或两者种以上组合。
进一步地,步骤1中的二异氰酸酯为甲苯二异氰酸酯(TDI)、异佛尔酮二异氰酸酯(IPDI)、二苯基甲烷二异氰酸酯(MDI)、二环己基甲烷二异氰酸酯(HMDI)、六亚甲基二异氰酸酯(HDI)、赖氨酸二异氰酸酯(LDI)中的一种或两者种以上组合。
进一步地,步骤1中所述催化剂为二月桂酸二丁基锡(DY-12)、双二甲氨基乙基醚(DY-1)、五甲基二乙烯三胺(DY-5)、二甲基环己胺(DY-8)、有机铋(DY-20)、三嗪类三聚催化剂(DY-41)中的一种或两者种以上组合。
进一步地,步骤1中的聚氨酯R值为1.0~1.5。
进一步地,步骤2所述的封端剂为甲醇、乙醇、乙二醇和γ-氨丙基三乙氧基硅烷(KH-550)中的一种或两者种以上组合。
进一步地,步骤2中的聚氨酯热熔胶的数均分子量为90000~100000g/mol。
进一步地,步骤3中的聚氨酯热熔胶的厚度为0.5~1.0mm。
进一步地,步骤3中的热熔胶的涂覆量为1~5g/m2。
与现有技术相比,本发明具有如下有益效果:
本发明以聚醚多元醇和二异氰酸酯混合,升温后加入催化剂,通过逐步聚合反应形成聚氨酯乳液,作为热熔胶涂覆在铝箔表面,充分干燥后,得到热熔铝箔,本发明热熔铝箔表面的聚氨酯,能有效提高铝箔的粘附力,并能提高铝箔防腐和耐磨性能,还能在铝箔发生弯曲时起到一定的缓冲作用,减少铝箔由于弯曲而形成的裂口、折皱等缺陷。本发明制得的聚氨酯热熔铝箔具有优良的耐磨性、耐腐蚀性以及耐折性,抗破裂性能好,不易发生裂口、折皱等缺陷,屏蔽性能好,质量稳定,应用范围广。
具体实施方式:
为了使本领域的技术人员更好地理解本发明的技术方案,下面结合实施例对本发明作进一步说明:
具体实施例
为本发明的其中一种具体实施方式:
在本实施例中,实施例1
采取以下步骤:
步骤1:室温下将聚氧化丙烯二醇(PPG)和甲苯二异氰酸酯(TDI)按照摩尔比为1.5:1混合,升温至60℃后加入0.3wt%双二甲氨基乙基醚(DY-1),搅拌2h得到聚氨酯预聚体;
步骤2:在60℃温度下向聚氨酯预聚体中加入甲醇,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为2g/m2,于80℃干燥处理0.5h,冷却、收卷,得到聚氨酯热熔铝箔。
实施例2
采取以下步骤:
步骤1:室温下将聚四氢呋喃二醇(PTHF)和异佛尔酮二异氰酸酯(IPDI)按照摩尔比为1:2混合,升温至70℃后加0.2wt%入二月桂酸二丁基锡(DY-12),搅拌1h得到聚氨酯预聚体;
步骤2:在70℃温度下向聚氨酯预聚体中加入乙醇,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为4g/m2,于100℃干燥处理1h,冷却、收卷,得到聚氨酯热熔铝箔。
实施例3
采取以下步骤:
步骤1:室温下将聚四氢呋喃-氧化丙烯共聚二醇和二苯基甲烷二异氰酸酯(MDI)按照摩尔比为1:1混合,升温至70℃后加入0.1wt%五甲基二乙烯三胺(DY-5),搅拌1h得到聚氨酯预聚体;
步骤2:在65℃温度下向聚氨酯预聚体中加入乙二醇,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为3g/m2,于90℃干燥处理2h,冷却、收卷,得到聚氨酯热熔铝箔。
实施例4
采取以下步骤:
步骤1:室温下将聚四氢呋喃二醇(PTMG)和二环己基甲烷二异氰酸酯(HMDI)按照摩尔比为1:2混合,升温至80℃后加入0.5wt%二甲基环己胺(DY-8),搅拌1h得到聚氨酯预聚体;
步骤2:在75℃温度下向聚氨酯预聚体中加入γ-氨丙基三乙氧基硅烷(KH-550),得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为5g/m2,于110℃干燥处理1.5h,冷却、收卷,得到聚氨酯热熔铝箔。
实施例5
采取以下步骤:
步骤1:室温下将聚氧化丙烯二醇(PPG)和六亚甲基二异氰酸酯(HDI)按照摩尔比为1:3混合,升温至65℃后加入0.4wt%有机铋(DY-20),搅拌2.5h得到聚氨酯预聚体;
步骤2:在65℃温度下向聚氨酯预聚体中加入乙二醇,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为4g/m2,于110℃干燥处理1h,冷却、收卷,得到聚氨酯热熔铝箔。
实施例6
采取以下步骤:
步骤1:室温下将四氢呋喃-氧化丙烯共聚二醇和赖氨酸二异氰酸酯(LDI)按照摩尔比为1:1混合,升温至75℃后加入0.2wt%三嗪类三聚催化剂(DY-41),搅拌2.5h得到聚氨酯预聚体;
步骤2:在80℃温度下向聚氨酯预聚体中加入甲醇,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,涂覆量为4g/m2,于110℃干燥处理1h,冷却、收卷,得到聚氨酯热熔铝箔。
通过对上述实施例1~6中的方法制得的聚氨酯热熔铝箔进行防腐耐摩擦性实验,结果表明,制得的涂层的摩擦系数可达0.2~0.3,磨损率为0.02~0.05mg/min。
表1铝箔的力学性能
本发明所公开具体实施例落入本发明权利要求保护范围之内,为本发明的特征部分的具体下位实施范围,具体实施例保护内容仅仅是为本发明权利要求保护范围的说明,本发明保护范围不止于具体实施例保护内容,具体实施例保护内容不应理解为对本发明权利要求保护范围的限制。
Claims (9)
1.一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:通过以下步骤实现:
步骤1:在60~80℃温度下将聚醚多元醇和二异氰酸酯混合,加入催化剂,催化剂含量为0.1~0.5wt%,磁力搅拌1~3h,得到聚氨酯预聚体;
步骤2:在60~80℃温度下向聚氨酯预聚体中加入封端剂,得到聚氨酯;
步骤3:将上述聚氨酯均匀涂覆于铝箔的表面,于80~120℃干燥处理0.5~2h,冷却、收卷,得到聚氨酯热熔铝箔。
2.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤1中的聚醚多元醇为聚丙二醇(PPG)、聚四氢呋喃二醇(PTMG)和四氢呋喃-氧化丙烯共聚二醇中的一种或两者种以上组合。
3.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤1中的二异氰酸酯为甲苯二异氰酸酯(TDI)、异佛尔酮二异氰酸酯(IPDI)、二苯基甲烷二异氰酸酯(MDI)、二环己基甲烷二异氰酸酯(HMDI)、六亚甲基二异氰酸酯(HDI)、赖氨酸二异氰酸酯(LDI)中的一种或两者种以上组合。
4.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤1中所述催化剂为二月桂酸二丁基锡(DY-12)、双二甲氨基乙基醚(DY-1)、五甲基二乙烯三胺(DY-5)、二甲基环己胺(DY-8)、有机铋(DY-20)、三嗪类三聚催化剂(DY-41)中的一种或两者种以上组合。
5.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤1中的聚氨酯R值为1.0~1.5。
6.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤2所述的封端剂为甲醇、乙醇、乙二醇和γ-氨丙基三乙氧基硅烷(KH-550)中的一种或两者种以上组合。
7.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤2中的聚氨酯热熔胶的数均分子量为90000~100000g/mol。
8.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤3中的聚氨酯热熔胶的厚度为0.5~1.0mm。
9.根据权利要求1所述的一种聚氨酯防腐耐磨热熔铝箔复合制备方法,其特征在于:步骤3中的热熔胶的涂覆量为1~5g/m2。
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