![[logo] US EPA](https://webarchive.library.unt.edu/eot2008/20090825071108im_/http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Final Report: Solventless, Electron Beam-Cured Acrylate Coating Formulations for Flexible Magnetic Media Manufacture
EPA Grant Number: R826728Title: Solventless, Electron Beam-Cured Acrylate Coating Formulations for Flexible Magnetic Media Manufacture
Investigators: Nikles, David E.
Institution: University of Alabama at Birmingham
EPA Project Officer: Richards, April
Project Period: October 1, 1998 through September 30, 2001
Project Amount: $285,000
RFA: Technology for a Sustainable Environment (1998)
Research Category: Pollution Prevention/Sustainable Development
Description:
Objective:The objective of this research was to lead the flexible magnetic media industry into the 21st century by providing new tape and floppy disk manufacturing processes that prevent air pollution. Our goal was to replace the organic solvents used in the coating process with a mixture of liquid acrylate monomers. The monomers serve as the solvent to disperse the magnetic pigments and dissolve any other ingredients, rendering fluidity and coatability to the formulation. Upon electron beam irradiation, the acrylates polymerize to give a solid binder with the requisite mechanical properties. The object of this research project is to identify the binder materials package that enables the solventless coating process.
Summary/Accomplishments (Outputs/Outcomes):Research has focused on solving our most challenging problem, which is dispersion
on the rheology of the dispersions. We are seeking methods to achieve solventless
acrylate dispersions with a magnetic particle loading greater than 30 volume
percent. Significant progress has been made toward realizing solventless, radiation-cured
coating formulations for magnetic tape manufacture. A series of trimethoxysilanes
was bound to the surface of commercial magnetic particles, through videotape
grade cobalt-modified 
-Fe2O3 of state-of-the-art iron particles. The silanes
made covalent bonds with surface hydroxyl groups on the particles. Solventless
formulations were prepared using particles treated with coupling agents. The
particle loading was up to 40 weight percent. The viscosity for the solventless
formulations showed an exponential decrease as a function of increasing shear
rate. This was similar to the shear-thinning behavior observed for conventional
solvent-based formulations. New acrylate functionalized silane coupling agents,
either branched or polymeric, were synthesized. Using a long spacer between
the silane functional group and the branch point relieved steric crowding for
the branched coupling agents. Fully pigmented, solventless acrylate formulations
can be cured by UV irradiation, provided the film thickness was 1 micron or less.
Journal Articles on this Report : 7 Displayed | Download in RIS Format
| Other project views: | All 15 publications | 10 publications in selected types | All 8 journal articles |
| Type | Citation | ||
|---|---|---|---|
|
|
Farahat MS, Nikles DE. Novel binder systems derived from poly(ethylene terephthalate) PET waste for solventless magnetic tape manufacturing: Investigation on the mechanical properties of the methacrylated oligoesters. Polymer Preprints 2001;42(2):558-559. |
R826728 (Final) |
not available |
|
|
Farahat MS, Nikles DE. On the UV curability and mechanical properties of novel binder systems derived from poly(ethylene terephthalate) PET waste for solventless magnetic tape manufacturing; 1. Acrylated oligoesters. Macromolecular Materials Engineering 2001;286(11):695-704. |
R826728 (Final) R827121 (2001) R827121 (Final) |
not available |
|
|
Hait SB, Nikles DE. Synthesis of amine-quinone polyurethanes with amine-quinone group in the backbone and acrylate group in the side chain of the polymer. Polymer Preprints 2001;42(2):674-675. |
R826728 (Final) |
not available |
|
|
Hait SB, Huh JY, Nikles DE. Synthesis of side chain amine-quinone polyurethanes and their use to inhibit the corrosion of iron particles. Polymer Preprints 2001;42(2):676-677. |
R826728 (Final) |
not available |
|
|
Huh JY, Woo T, Nikles DE. Effect of silane coupling agents on rheological properties of solventless magnetic ink. Polymeric Materials: Science and Engineering 2001;85:387-388. |
R826728 (Final) |
not available |
|
|
Nikles SM, Piao M, Lane AM, Nikles DE. Ethyl lactate: A green solvent for magnetic tape coating. Green Chemistry 2001;3(3):109-113. |
R826728 (Final) R827121 (2001) R827121 (Final) |
not available |
|
|
Woo T, Huh JY, Nikles DE. Surface chemistry and dispersion of magnetic pigment for a solventless process. Ieee Transactions on Magnetics 2001;37(4):1634-1636 |
R826728 (Final) R827121 (2001) R827121 (Final) |
not available |
air, VOC, solvents, pollution prevention, green chemistry, clean technologies, environmentally conscious manufacturing, chemistry, engineering, electronics. , Industry Sectors, Air, Sustainable Industry/Business, Scientific Discipline, RFA, Technology for Sustainable Environment, Sustainable Environment, indoor air, air toxics, Manufacturing - NAIC 31-33, Environmental Chemistry, tropospheric ozone, treatment, cleaner production, indoor air quality, waste reduction, green chemistry, sustainable development, flexible magnetic media manufacture, hazardous emissions, waste minimization, environmentally conscious manufacturing, green process systems, industrial innovations, polymer design, acrylate coating, source reduction, stratospheric ozone, air pollution control, liquid acrylate monomers, electron beam-cured vinyl ether coating formulations, innovative technology, solvent substitute, pollution prevention, environmental exposure
Progress and Final Reports:
2000 Progress Report
Original Abstract