Abstract

The solution polymerization was conducted to synthesize pressure sensitive adhesive for polarizer film using acrylic monomers. 2-Ethylhexyl acrylate, butyl acrylate, acrylic acid were used as acrylic monomers, benzoyl peroxide as initiator, ethyl acetate as solvent. The ratio of monomers was 2-ethylhexyl acrylate: butyl acrylate: acrylic acid = 25:50:3.6 reflecting $-40^{\circ}C$ of glass transition temperature in the pressure sensitive adhesive. The amount of initiator was determined as 0.09% to monomer considering wetting power and initial tackiness. The ratio of monomer to solvent was determined as 1:1.7 considering wetting power and transmissivity. The transmissivity of pressure sensitive adhesive increased with decreasing both viscosity and molecular weight due to reducing of refractive index by low entanglement between molecules. In the measurement of pot life, it was found that the storage stability was good at 1:1.7 of monomer: solvent without large change of viscosity during 200 min.

Keywords

• solution polymerization;
• pressure sensitive adhesive;
• polarizer film;
• acrylic monomers

File

Download PDF

References

1. Y. Kano and S. Akiyama, 'Application of Adhesives and Sealants', Polymer, 37, 4497 (1996) https://doi.org/10.1016/0032-3861(96)00298-4
2. Y. Kano, S Akiyama, and T. Kasemura, 'Application of Pressure Sensitive Adhesive' Int. J. Adhesion Adhesives, 17, 207 (1997) https://doi.org/10.1016/S0143-7496(97)00003-1
3. I. H. Park, 'Application and Testing of Adhesives', chap. 6, Korea Chemical Research Institute, 1994
4. L. Peter, 'Pressure Sensitive Adhesives Market 1997: A Multiclient Sensitive Adhesive Applications'; BASF Symposium, Ludwigschaffen, Germany, Feb. 15-16 (1996)
5. H. J. Kim, 'Miscibilty and Performance of Acrylic Pressure Sensitive Adhesive', Ph. D Thesis, The University of Tokyo (1995)
6. C. Creton and L. Leibler, 'Polymerization of Acrylic Pressure Sensitive Adhesive', J Polym. Sci. Part B:Polym. Phys., 34, 545 (1996) https://doi.org/10.1002/(SICI)1099-0488(199602)34:3<545::AID-POLB13>3.0.CO;2-I
7. Donatas Satas, 'Handbook of Pressure Sensitive Adhesive Technology', p. 604, Van Nostrand Reinhold Co., New York, 1982
8. G. Ordian, 'Principles of Polymerization', 3rd Ed, p. 112, Wiley, New York, 1991
9. L. H. Sperling, 'Introduction to Physical Polymer Science', 3rd, p. 322, Wiley-interscience, 2001
10. 'Testing Methods of Pressure Sensitive Adhesive Tapes and Sheets', KS M 7016 (1992)
11. 'Testing Methods of Pressure Sensitive Adhesive Tapes and Sheets', KS A 1107 (1992)