Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1994-05-25
1995-05-23
Krass, Frederick
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
525504, C08G 5944, C08G 5950, C08G 6500
Patent
active
054183138
ABSTRACT:
This invention relates to an improved method for curing polyepoxide resins at elevated temperature and particularly to a method for reducing the time required to effect cure of thermosetting resins at elevated temperature without sacrificing performance. In the basic process, an epoxide resin comprising a polyglycidyl ether of a polyhydric phenol is contacted with methylenedianiline or derivative thereof, e.g., methylenedianiline and di(3-methyl-4-aminophenyl)methane in an amount sufficient to effect cure of the polyepoxide resin at an initial temperature and then raised to a final cure temperature. The improvement for reducing the time necessary for cure comprises:
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Vratsanos, Menas S. and Richard J. Farris, "Network Mechanical Properties of Amine-Cured Epoxies" Polymer Engineering and Science vol. 29, 806-816 (1989).
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Vratsanos, Menas S., and Richard J. Farris, "A Method for Calculating Dynamic Mechanical Properties Using Fourier Transforms of Pulse Deformation Experiments". Journal of Applied Polymer Sciences, vol. 36, 403-413 (1988).
Smith Andrea K.
Vratsanos Menas S.
Air Products and Chemicals Inc.
Brewer Russell L.
Krass Frederick
Marsh William F.
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