微球型丙烯酸酯壓敏膠的制備研究

胡 佳，王凱軍，林中祥*，陳志超

（1.南京林業大學 化學工程學院 精細化工系，江蘇 南京 210037；2.哈藥集團醫藥有限公司 藥品分公司，黑龍江 哈爾濱 150020）

微球型丙烯酸酯壓敏膠的制備研究

胡 佳1，王凱軍2，林中祥1*，陳志超1

（1.南京林業大學 化學工程學院 精細化工系，江蘇 南京 210037；2.哈藥集團醫藥有限公司 藥品分公司，黑龍江 哈爾濱 150020）

采用懸浮聚合法制備了微球型丙烯酸壓敏膠，以丙烯酸酯類單體為主體，在含有分散劑的水相中采用懸浮聚合的方法制備了粒徑為10～100μm黏性聚合物微球。使用這種微球富集相按照一定比例調配自制的乳液，增稠劑及其他添加劑制得的壓敏膠液用線棒涂布器涂布于紙等基材上烘干即得具有良好再剝離性的反復粘貼壓敏膠。在吸取前人的經驗并通過大量的實驗中發現添加單體A是制備出穩定且單分散性好的微球壓敏膠的重要因素。通過調控單體A的配比以及其他工藝參數，制得的壓敏微球膠黏劑，按照3M公司專利上的方法進行檢測，獲得了類似于國外同類產品的性能。其具體性能指標為：平均粒徑:53μm；初黏：6號球；剝離強度：1.21N/25mm；100次粘貼剝離強度：1.06N/25mm；2kg重壓一周后仍能輕易剝離而不損傷紙面。樣品適用于各種表面的粘貼，可以作為便事貼、各種難粘表面的表面保護膜、醫用壓敏膠使用。

反復粘貼；聚丙烯酸酯微球；懸浮聚合；便事貼

Abstract:A microsphere pressure sensitive adhesive whose particle size was 10～100μm was made with using acrylic monomers in the water phase in the presence of dispersant by suspension polymerization method.By mixing the cream (the microsphere-rich phase)with certain percentage of the emulsion,thickeners and other additives,the pressure sensitive adhesive liquid was prepared,then coated it with a bar coater onto the paper,after drying,the PSA with good re-bonding property was manufactured.It was found that the addition of monomer A is an important factor for the preparation of this microspheres adhesive with good single-dispersion.By regulating the ratio of monomer A and other parameters,the performances of obtained pressure-sensitive microsphere adhesive was similar to the performance of foreign products in accordance with the method of detection mentioned on 3M company's patents.Its specific performance indicators were as follows:average particle size:53μm;initial adhesion:6#Ball;peel strength:1.21 N/25mm;100 times paste peel strength:1.16 N/25mm;it could be easily peeled without damaging the paper after treating by 2 kg’s pressure for a week.This adhesive could be used for various surfaces,and applied as self-stick notes,surface protective film for hard-bonding surfaces and even medical PSA.

Key words:Re-bonding;acrylic microsphere;suspension polymerization;self-stick notes

前 言

以3M公司的POSTITTM為代表的便事貼產品因其使用便捷而廣泛應用于生活，辦公等各個領域。這種膠黏劑的英文名稱為“repositionable pressure sensitive adhesive”，即為“可反復定位的壓敏膠”。……