CN114108369A - 一种离型纸的离型层耐高温涂料及其制备方法 - Google Patents
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Abstract
本发明公开了一种离型纸的离型层耐高温涂料，其特征在于：由以下原料按照质量配比组成：改性聚丙烯20～30份、环氧性有机树脂35～45份，分散剂2～3.5份、去离子水10～15份、纳米二氧化硅17～20份、乳化剂1.2～1.5份、防老剂0.3～0.8份、促进剂3～6份和氢氧化钙粉末5～7份。本发明添加了去离子水、纳米二氧化硅、乳化剂、防老剂、促进剂和氢氧化钙粉末作为原料，能够有效提高离型纸的耐高温性能和耐腐蚀能力，使原料涂层具有较强的抗剥离性能减少外部环境对离型纸正常使用的影响，在短时的高温条件下不易萎缩变形，同时具备较佳的亮度和抗拉强度，稳定性好。
Description
技术领域：
本发明属于离型纸技术领域，尤其是涉及一种离型纸的离型层耐高温涂料及其制备方法。
背景技术：
离型纸是一种既能防止被隔离的物质相互粘结在表面，又能保护被隔离的物质不受污染的特种用纸。离型纸的种类可分为两大类：一类是用于生产聚氯乙烯（PVC）人造革的离型纸；另一类是用于生产聚氨醋（PU）合成革的离型纸。耐高温型离型纸可用于制造不同温度要求的合成革和人造革等。耐高温型离型纸耐热温度在150℃～240℃，国内目前制得的离型纸耐热温度较低，用于制造PVC人造革的离型纸耐热温度在200℃左右，而用于制造PU合成革的离型纸耐热温度在160℃左右，无法满足工作的需要。国外的耐高温型离型纸的耐热温度最高可达到 265℃，故大多数耐高温型离型纸均依赖于进口。因此研发耐高温型离型纸不仅具有较高的市场价值，同时可打破国外企业对该产品系列的垄断状态，国产耐高温型离型纸一旦开发成功并投向市场，必然会对进口纸的价格产生降价压力，从而使我国耐高温纸应用商可以获得更为廉价的耐高温型离型纸，从而降低其生产成本。
发明内容：
本发明所要解决的技术问题是：提供一种制备工艺简单且成本低，能够满足200℃～220℃耐高温使用性能的离型纸的离型层耐高温涂料及其制备方法。
为了解决上述技术问题，本发明是通过以下技术方案实现的：一种离型纸的离型层耐高温涂料，其特征在于：由以下原料按照质量配比组成：改性聚丙烯20～30份、环氧性有机树脂35～45份，分散剂2～3.5份、去离子水10～15份、纳米二氧化硅17～20份、乳化剂1.2～1.5份、防老剂0.3～0.8份、促进剂3～6份和氢氧化钙粉末5～7份。
作为优选，所述乳化剂为非离子型乳化剂。
作为优选，所述防老剂选用抗热氧老化防老剂。
作为优选，所述促进剂选用硫化促进剂NS。
作为优选，所述分散剂选用水解聚马来酸酐。
离型纸的离型层耐高温涂料的制备方法，包括以下步骤，
A:取环氧性有机树脂添加去放入搅拌罐中以2500r/min速度搅拌5min～10min后，再将改性聚丙烯等分为10份，间隔3min逐步投放到搅拌罐中与环氧性有机树脂搅拌均匀后静置；
B:取纳米二氧化硅和氢氧化钙粉末添加去离子水加热至80℃，制成溶液；
C:将上述溶液添加至搅拌罐中，以1500-2000r/min速度搅拌5min～10min；
D：再取分散剂添加分散剂、乳化剂和促进剂添加至搅拌罐中，并加热至125℃～150℃。
F：最后取防老剂添加至搅拌罐内，以2500-3000r/min速度快速搅拌60s～80s，制得耐高温涂料。
G：快速将制得的耐高温涂料注入到与空气隔绝的储存罐中保存。
与现有技术相比，本发明的有益之处是：本发明添加了去离子水、纳米二氧化硅、乳化剂、防老剂、促进剂和氢氧化钙粉末作为原料，能够有效提高离型纸的耐高温性能和耐腐蚀能力，使原料涂层具有较强的抗剥离性能减少外部环境对离型纸正常使用的影响，在短时的高温条件下不易萎缩变形，同时具备较佳的亮度和抗拉强度，稳定性好。
具体实施方式：
下面结合具体实施方式对本发明进行详细描述：
一种离型纸的离型层耐高温涂料，由以下原料按照质量配比组成：改性聚丙烯20～30份、环氧性有机树脂35～45份，分散剂2～3.5份、去离子水10～15份、纳米二氧化硅17～20份、乳化剂1.2～1.5份、防老剂0.3～0.8份、促进剂3～6份和氢氧化钙粉末5～7份。所述乳化剂为非离子型乳化剂，这种乳化剂在水中不电离。其亲水基是各种极性基，如聚氧乙烯醚、聚氧丙烯醚、环氧乙烷和环氧丙烷嵌段共聚物、多元醇脂肪酸酯、聚乙烯醇，能够保持本涂料处于乳化状态。所述防老剂选用抗热氧老化防老剂，防老剂是指能延缓高分子化合老化的物质。大多能抑制氧化作用，有些能抑制热或光的作用，从而延长制品的使用寿命。一般分为天然防老剂、物理防老剂和化学防老剂，能够避免本涂料在涂刷完成后出现硬化问题。所述促进剂选用硫化促进剂NS，促进剂可以提高反应速率的一种用量较少的物质。所述分散剂选用水解聚马来酸酐，具有化学稳定性及热稳定性高，分解温度在330℃以上，能够提供本涂料粘附在离型纸基材上的剥离性能。改性聚丙烯为改性PP专用料是针对特定产品而专门开发的聚丙烯物料，作为本涂料的基料，环氧性有机树脂是一种高分子聚合物，分子式为(C11H12O3)n，是指分子中含有两个以上环氧基团的一类聚合物的总称。它是环氧氯丙烷与双酚A或多元醇的缩聚产物。由于环氧基的化学活性，可用多种含有活泼氢的化合物使其开环，固化交联生成网状结构，因此它是一种热固性树脂。双酚A型环氧树脂不仅产量最大，品种最全，而且新的改性品种仍在不断增加，质量正在不断提高，作为本涂料的另一基料。
实施例（一）：
离型纸的离型层耐高温涂料的制备方法，包括以下步骤，取环氧性有机树脂36添加去放入搅拌罐中以2500r/min速度搅拌6min后，再将改性聚丙烯23份等分为10份，间隔3min逐步投放到搅拌罐中与环氧性有机树脂搅拌均匀后静置；取纳米二氧化硅17份和氢氧化钙粉末5份添加去离子水加热至80℃，制成溶液；将上述溶液添加至搅拌罐中，以1500r/min速度搅拌6min；再取分散剂添加分散剂2份、乳化剂1.3份和促进剂3.5份添加至搅拌罐中，并加热至128℃。最后取防老剂0.5份添加至搅拌罐内，以2800r/min速度快速搅拌69s，制得耐高温涂料；快速将制得的耐高温涂料注入到与空气隔绝的储存罐中保存。
实施例（二）：
取环氧性有机树脂添加去放入搅拌罐中以2500r/min速度搅拌9min后，再将改性聚丙烯29份等分为10份，间隔3min逐步投放到搅拌罐中与环氧性有机树脂44份搅拌均匀后静置；取纳米二氧化硅20份和氢氧化钙7份粉末添加去离子水加热至80℃，制成溶液；将上述溶液添加至搅拌罐中，以1800r/min速度搅拌9min；再取分散剂添加分散剂3.3份、乳化剂1.5份和促进剂5份添加至搅拌罐中，并加热至145℃。最后取防老剂0.7份添加至搅拌罐内，以3000r/min速度快速搅拌80s，制得耐高温涂料。快速将制得的耐高温涂料注入到与空气隔绝的储存罐中保存。
需要强调的是：对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
Claims (6)
1.一种离型纸的离型层耐高温涂料，其特征在于：由以下原料按照质量配比组成：改性聚丙烯20～30份、环氧性有机树脂35～45份，分散剂2～3.5份、去离子水10～15份、纳米二氧化硅17～20份、乳化剂1.2～1.5份、防老剂0.3～0.8份、促进剂3～6份和氢氧化钙粉末5～7份。
2.根据权利要求1所述的离型纸的离型层耐高温涂料，其特征在于：所述乳化剂为非离子型乳化剂。
3.根据权利要求1所述的离型纸的离型层耐高温涂料，其特征在于：所述防老剂选用抗热氧老化防老剂。
4.根据权利要求1所述的离型纸的离型层耐高温涂料，其特征在于：所述促进剂选用硫化促进剂NS。
5.根据权利要求1所述的离型纸的离型层耐高温涂料，其特征在于：所述分散剂选用水解聚马来酸酐。
6.根据权利要求1-5任意一项所述离型纸的离型层耐高温涂料的制备方法，其特征在于：包括以下步骤，
A:取环氧性有机树脂添加去放入搅拌罐中以2500r/min速度搅拌5min～10min后，再将改性聚丙烯等分为10份，间隔3min逐步投放到搅拌罐中与环氧性有机树脂搅拌均匀后静置；
B:取纳米二氧化硅和氢氧化钙粉末添加去离子水加热至80℃，制成溶液；
C:将上述溶液添加至搅拌罐中，以1500-2000r/min速度搅拌5min～10min；
D：再取分散剂添加分散剂、乳化剂和促进剂添加至搅拌罐中，并加热至125℃～150℃；
F：最后取防老剂添加至搅拌罐内，以2500-3000r/min速度快速搅拌60s～80s，制得耐高温涂料；
G：快速将制得的耐高温涂料注入到与空气隔绝的储存罐中保存。
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| US20050214486A1 (en) * | 2002-09-10 | 2005-09-29 | Yupo Corporation | Melt thermal transfer recording paper |
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| JP2009208307A (ja) * | 2008-03-03 | 2009-09-17 | Dainippon Printing Co Ltd | プリプレグ用剥離紙 |
| JP2010222757A (ja) * | 2009-03-25 | 2010-10-07 | Daio Paper Corp | 工程剥離紙 |
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