Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1988-10-17
1990-02-27
Wityshyn, Michael
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156281, 1563073, 156330, 1563317, 427 541, B05D 306, B32B 3112
Patent
active
049043285
ABSTRACT:
Cleaning of thermoset FRP part surfaces to be bonded together is accomplished by the application of low intensity, i.e., 0.05 to 10 watts per cm.sup.2, short wavelength ultraviolet radiation in the range of 170 to 300 nm, for a period of time of usually less than 10 seconds which results in removing an effective amount of material, e.g., from about 1 to about 200 angstroms. The cleaning increases the adhesive potential of FRPs to polyurethane adhesives. Furthermore, FRP polymer surfaces treated by this process retain more adhesive strength after aging at elevated temperature in the presence of moisture than untreated surfaces or surfaces washed with isocyanate in MeCl.sub.2. Epoxy adhesives, also, can be used.
REFERENCES:
patent: 4307045 (1981-12-01), Imada et al.
patent: 4417948 (1983-11-01), Mayne-Banton et al.
patent: 4745018 (1988-05-01), Chihara et al.
C. E. Bryson et al, Surface Contamination, Genesis, Detection and Control, vol. 1, K. L. Mittal Ed., Plenum (1979).
John R. Vig, "UV/Ozone Cleaning of Surfaces: A Review," ibid.
James Peeling et al, J. Polymer Sci. Poly. Chem. 21, 2047, 1983, Surface Ozonation and Photooxidation of Polyethylene Film.
Kirk-Othmer, "Encyclopedia of Chemical Technology," Third Edition, vol. 16, John Wiley & Sons, New York, 1981, pp. 689-690.
Beecher James F.
Cocain H. William
GenCorp Inc.
Wityshyn Michael
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