CN116478653A - 一种生物基可降解湿固化聚氨酯热熔胶及其制备方法 - Google Patents
一种生物基可降解湿固化聚氨酯热熔胶及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种生物基可降解湿固化聚氨酯热熔胶,由如下重量百分比的组分组成:生物基聚酯二元醇A 20%~40%、聚碳酸酯多元醇B 10%‑25%、聚醚多元醇C 15%‑25%、增粘树脂5%~15%、抗氧剂0.1%~1%、异氰酸酯10%~25%、偶联剂1%~2%和催化剂0.05%~0.1%。该生物基聚酯二元醇是一种以小分子二元醇为起始剂,由己内酯与乳酸在辛酸亚锡的作用下聚合而成的数均分子量为1500‑4000的聚酯二元醇。本发明采用生物基原料制备一种生物基聚酯二元醇并将其应用在湿固化聚氨酯热熔胶中,得到一种具有优良粘接力、优良柔韧性且在微生物作用下能具有可降解性的湿固化聚氨酯热熔胶。
Description
技术领域
本发明涉及热熔胶,尤其涉及一种生物基可降解湿固化聚氨酯热熔胶及其制备方法。
背景技术
湿固化聚氨酯热熔胶(PUR)作为一种无溶剂、固含量100%、具有优异初始粘接强度且粘接强度随着固化时间增加而逐渐增加的高性能环保型胶黏剂,广泛应用与电子,包装,汽车、书籍等各类领域,也是当下最具发展前景的胶黏剂之一。
聚酯多元醇作为湿固化聚氨酯热熔胶的重要组成成分,对体系本身的力学性能和粘接性能有着重要的影响。但目前大多数的聚酯多元醇仍然保持着对于化石燃料的依赖,不具备生物基材料的可持续性。
目前市面上已经出现的生物基聚酯多元醇中,聚乳酸多元醇及聚己内酯作为生物高分子是当今材料科学领域的研究热点,而脂肪族聚酯又是生物高分子中最重要的品种。聚乳酸(PLA)具有较高的强度及较好的可降解性,但刚性较强,抗冲击性能不足;聚己内酯则有着较好的柔韧性,也有着一定的可降解性,但粘接强度较差。因此若能实现其二者的共聚,使二者的性能互补,则能在一定程度上拓宽其应用领域。综上,如何提供一种性能优异、可降解、分子量适宜且两个端基团均为伯羟基的可降解生物基聚酯多元醇,成为一种待解决的问题。
发明内容
本发明的目的是针对上述问题而提供的一种生物基可降解湿固化聚氨酯热熔胶及其制备方法。
本发明的目的是这样实现的:
本发明解决上述技术问题的技术方案如下:一种生物基可降解湿固化聚氨酯热熔胶,由如下重量百分比的组分组成:
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述生物基聚酯二元醇是一种以小分子二元醇为起始剂,由己内酯与乳酸在辛酸亚锡的作用下聚合而成的数均分子量为1500-4000的聚酯二元醇。
所述生物基多元醇由通式(Ⅰ)表示:
其中,所述小分子多元醇为含有两个伯羟基且分子量在50-150的二元醇。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述生物基聚酯二元醇的制备方法包含以下步骤:
将己内酯、乳酸及小分子二元醇按照摩尔比为:(8-20):(8-20):1加入反应釜中,加入辛酸亚锡,在惰性气体保护下升温至100-150℃,反应24h后冷却至室温即得。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述聚碳酸酯二元醇为数均分子量为2000分子量的聚碳酸亚丙酯二醇,型号为PPCD-531。
所述聚醚多元醇为数均分子量为1000-4000的聚醚多元醇,为聚氧化丙烯二醇、聚乙二醇和聚四氢呋喃醚二醇中的一种或者多种的组合,优选为采购自陶氏化学的聚醚多元醇型号为PPG2000。
所述增粘树脂为丙烯酸树脂、酚醛树脂、C5-C9石油树脂、松香、改性松香树脂、氢化石油树脂和萜烯酚树脂中的一种或多种的组合。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述抗氧剂为抗氧剂245、抗氧剂1010、抗氧剂1076、抗氧剂1098、抗氧剂1330和抗氧剂3114中的一种或多种的组合。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述异氰酸酯为甲苯二异氰酸酯、二苯基甲烷二异氰酸酯和六亚甲基二异氰酸酯中的一种或多种的组合,优选为采购自万华化学的二苯基甲烷二异氰酸酯,代号为MDI-100。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述偶联剂为KH-550、KH-560、KH570中的一种,其中优选为KH550。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述催化剂为辛酸铅、三乙胺、三亚乙基二胺、辛酸钴、环烷酸锌、钛酸四异丁酯或二吗啉基二乙基醚中的一种或多种的组合,优选为采购自亨斯迈的二吗啉基二乙基醚,代号为DMDEE。
上述生物基可降解湿固化聚氨酯热熔胶,其中,所述助剂包括稳定剂、稀释剂、填料及颜料中的一种或几种。
上述生物基可降解湿固化聚氨酯热熔胶的制备方法,包含以下步骤
1.按照各组分质量分数准备原料;
2.将步骤1中准备好的生物基聚酯二元醇A、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
3.将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入步骤1中准备好的融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下,120℃高速搅拌1h-1.5h。
4.加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
5.加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
本发明的有益效果如下:
(1)本发明采用小分子二元醇为起始剂,由己内酯与乳酸在第二催化的作用下聚合而成的数均分子量为1500-4000的生物基聚酯二元醇。通过己内酯与乳酸的共聚,得到一种在微生物作用下具有良好可降解性同时具有较好韧性及较高粘接强度的生物基聚酯多元醇。
(2)本发明采用上述生物基聚酯多元醇与聚醚多元醇及其他组分反应,开发一种绿色、环保、可降解的生物基湿固化聚氨酯热熔胶。
具体实施方式
以下结合实例对本发明进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
表1实施例1~4聚酯二醇配方
实施例5
将生物基聚酯二元醇A(实施例1)、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下120℃高速搅拌1h-1.5h。
加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
实施例6
将生物基聚酯二元醇A(实施例2)、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下120℃高速搅拌1h-1.5h。
加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
实施例7
将生物基聚酯二元醇A(实施例3)、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下120℃高速搅拌1h-1.5h。
加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
实施例8
将生物基聚酯二元醇A(实施例4)、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下120℃高速搅拌1h-1.5h。
加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
对比例:1
一种生物基反应型聚氨酯热熔胶,包括以下步骤:
将聚酯二元醇(7360)、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
将上述反应釜中的物料降温至80℃,在高速搅拌的条件下加入融化好的异氰酸酯,同时开启加热设备使釜体升温至120℃,保持真空度≤-0.095MPA条件下120℃高速搅拌1h-1.5h。
加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
将上述实施例5-8与对比例1、对比例2:市售Henkel乐泰3542湿固化聚氨酯热熔胶进行性能对比测试:
1、粘接强度测试:热熔胶的粘接性能按照国标GB/T5210-2006《色漆和清漆拉开法附着力试验》测试,以PC为粘接材料,粘接尺寸为30mm2,胶层厚度为0.18-0.22mm,胶量约为8mg,将搭界好的样件放置于25℃,50%Rh恒温恒湿箱中固化7天后使用万能拉力机测试拉拔强度。
2、断裂伸长率、拉伸强度测试:热熔胶的断裂伸长率、拉伸强度性能按照国标GB/T528-2009《硫化橡胶或热塑性橡胶拉伸应力应变性能的测定标准》测试,按照标准制样,放置于25℃,50%Rh恒温恒湿箱中固化7天后使用万能拉力机测试断裂伸长率基拉伸强度测试。
3、降解能力测试:取不同组的湿固化聚氨酯热熔胶进行自然环境下的微生物降解测试。具体的,在离型纸上涂胶并使用热压机热压厚度为0.3mm的胶片,置于25℃50%RH环境箱固化168h后裁剪出若干个大小为3*3cm称取并记录重量后埋与土壤中,定时去除清洗干燥后记录剩余质量百分比,记录。
表二:实施例5-8及对比例1性能测试结果如下表所示:
表三:实施例5-8及对比例1、对比例2降解能力测试结果如下表所示:
由表2可得知,实施例5-8中与对比例1对比,添加了乳酸与己内酯共聚的生物基聚酯多元醇,表现了更高的粘接强度,且对比实施例7与对比例1,体现了相同分子量下该生物基聚酯多元醇表现了更好的柔韧性。实施例5-8与对比例2Henkel乐泰3542,表现了更好的粘接强度和更好的柔韧性.
由表3可得知,实施例5-8中与对比例1对比,添加了乳酸与己内酯共聚的生物基聚酯多元醇,表现了更好的可降解性,对比例1虽然具有一定的可降解性,但是由于对比例1中选用的聚碳酸酯多元醇B—PPCD-531具有一定的可降解性。实施例5-8与对比例2Henkel乐泰3542,表现了更好的可降解性,而Henkel乐泰3542在同等条件下,基本无重量变化,即基本不可能降解。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,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 (7)
1.一种生物基可降解湿固化聚氨酯热熔胶,由如下重量百分比的组分组成:
2.根据权利要求1所述生物基可降解湿固化聚氨酯热熔胶其特征在于,所述生物基聚酯二元醇A是一种以小分子二元醇为起始剂,由己内酯与乳酸在辛酸亚锡的催化作用下聚合而成的数均分子量为1500-4000的聚酯二元醇,其结构通式如下表示:
3.根据权利要求2所述的生物基可降解湿固化聚氨酯热熔胶,其特征在于,所述生物基聚酯二元醇的制备方法包含以下步骤:将己内酯、乳酸及小分子二元醇按照摩尔比为:(8-20):(8-20):1加入反应釜中,加入辛酸亚锡,在惰性气体保护下升温至100-150℃,反应24h后冷却至室温即得。
4.根据权利要求1所述的生物基可降解湿固化聚氨酯热熔胶,其特征在于,所述聚碳酸酯二元醇为数均分子量为2000的聚碳酸亚丙酯二醇,型号为PPCD-531;所述聚醚多元醇为数均分子量为1000-4000的聚醚多元醇,为聚氧化丙烯二醇、聚乙二醇和聚四氢呋喃醚二醇中的一种或者多种的组合,优选陶氏化学的聚醚多元醇型号为PPG2000。
5.根据权利要求1所述的生物基可降解湿固化聚氨酯热熔胶,其特征在于,所述增粘树脂为丙烯酸树脂、酚醛树脂、C5-C9石油树脂、松香、改性松香树脂、氢化石油树脂和萜烯酚树脂中的一种或多种的组合;所述抗氧剂为抗氧剂245、抗氧剂1010、抗氧剂1076、抗氧剂1098、抗氧剂1330和抗氧剂3114中的一种或多种的组合;所述异氰酸酯为甲苯二异氰酸酯、二苯基甲烷二异氰酸酯和六亚甲基二异氰酸酯中的一种或多种的组合,优选万华化学的二苯基甲烷二异氰酸酯,代号为MDI-100。
6.根据权利要求1所述的生物基可降解湿固化聚氨酯热熔胶,其特征在于,所述偶联剂为KH-550、KH-560、KH570中的一种,优选为KH550;所述催化剂为辛酸铅、三乙胺、三亚乙基二胺、辛酸钴、环烷酸锌、钛酸四异丁酯或二吗啉基二乙基醚中的一种或多种的组合,优选亨斯迈的二吗啉基二乙基醚,代号为DMDEE;所述助剂包括稳定剂、稀释剂、填料及颜料中的一种或几种。
7.一种如权利要求1-6任一项所述的生物基可降解湿固化聚氨酯热熔胶的制备方法,其特征在于,包括以下步骤:
(1)按重量份数称取各组分,将所述生物基聚酯二元醇A、聚碳酸酯多元醇B、聚醚多元醇C、增粘树脂、抗氧剂投入反应釜中搅拌混合,加热升温至130-140℃,抽真空,在真空度≤-0.095MPa条件下脱水2.5h;
(2)将上述反应釜中的物料降温至70-80℃,在高速搅拌的条件下加入融化后的异氰酸酯,同时开启加热升温至120℃后保持真空度≤-0.095MPa条件下120℃高速搅拌1-1.5h;
(3)加入硅烷偶联剂,在真空度≤-0.095MPa的条件下搅拌45min;
(4)加入催化剂,在真空度≤-0.095MPa的条件下搅拌15min;
(5)氮气保护下快速出料并封装于铝箔袋中,在80-85℃的烘箱中进行熟化,得到所述生物基可降解湿固化聚氨酯热熔胶。
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CN113801619A (zh) * | 2021-09-29 | 2021-12-17 | 韦尔通(厦门)科技股份有限公司 | 一种含异山梨醇的生物基反应型聚氨酯热熔胶及其制备方法 |
CN113881388A (zh) * | 2021-10-20 | 2022-01-04 | 烟台德邦科技股份有限公司 | 一种湿固化聚氨酯热熔胶及其制备方法 |
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