丙烯酸酯压敏胶的制备及性能研究

Study on the preparation and properties of acrylate pressure sensitive adhesive

采用溶液聚合工艺,以丙烯酸−2-乙基己酯为软单体,丙烯酸甲酯为硬单体,丙烯酸为功能单体,乙酸乙酯为溶剂,偶氮二异丁腈为引发剂,制备了不同单体浓度和胶层厚度的溶剂型丙烯酸酯压敏胶。研究了单体浓度和胶层厚度对丙烯酸酯压敏胶力学性能(环形初粘力、180°剥离强度、持粘性)的影响。研究结果表明:单体浓度对丙烯酸压敏胶的固含率影响较小;单体浓度为47.64%时,黏度相对最为合适;当单体浓度为47.64%,胶层厚度为30μm时,可以得到在环形初粘力、180°剥离强度、持粘性这三种性能之间较为平衡和性能优异的丙烯酸酯压敏胶。

Solvent-based acrylate pressure sensitive adhesive with different monomer concentrations and adhesive thickness were prepared by solution polymerization process,using 2-ethylhexyl acrylate as soft monomer,methyl acrylate as hard monomer,acrylic acid as functional monomer,ethyl acetate as solvent,andazodiisobutyronitrile as initiator.The effects of monomer concentration and adhesive thickness on the mechanicalproperties(loop tack,180° peel strength and holding power) of acrylate pressure sensitive adhesive were studied.The research results showed that the monomer concentration had little effect on the solid content of acrylatepressure sensitive adhesive.When the monomer concentration was 47.64%,the viscosity was relatively optimal.When the monomer concentration was 47.64% and the adhesive thickness was 30 μm,the acrylate pressuresensitive adhesive with excellent performance and balance among the three properties of loop tack,180° peelstrength and holding power could be obtained.