微球型丙烯酸酯压敏胶的制备研究

采用悬浮聚合法制备了微球型丙烯酸压敏胶,以丙烯酸酯类单体为主体,在含有分散剂的水相中采用悬浮聚合的方法制备了粒径为10-100μm黏性聚合物微球.使用这种微球富集相按照一定比例调配自制的乳液,增稠剂及其他添加剂制得的压敏胶液用线棒涂布器涂布于纸等基材上烘干即得具有良好再剥离性的反复粘贴压敏胶.在吸取前人的经验并通过大量...

Synthesis of Acrylate Copolymer Microspheres for Pressure Sensitive Adhesive

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 micmsphere-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.