Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-12-28
1993-12-21
Lovering, Richard D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
209 11, 209214, 210773, 219 1041, 219 1053, 219 1055M, 219 1055R, 525317, 528481, 528503, 585241, C08C 1904, C08F 806, C08J 328, H05B 664
Patent
active
052722163
ABSTRACT:
Both a system and method are provided for remotely heating a polymeric material to a selected temperature. The system generally comprises particulate ferromagnetic material dispersed throughout the polymeric material to form a composite, wherein the particulate material has a Curie temperature that corresponds to the selected heating temperature, and a source of microwave energy for remotely applying a beam of microwave energy to the polymeric composite material. Preferably, the particulate ferromagnetic material comprises only about 2 percent of the total composite by weight. The polymeric material may be compliant, thermosettable plastic, and the Curie temperature of the particulate ferromagnetic material dispersed therein may advantageously be above the curing temperature of the polymer, such that the beam from the source of microwave energy may be used to remotely join surfaces or construct joints in composite structures. Alternatively, the polymeric material may be a meltable plastic, and the Curie temperature of the particulate ferromagnetic material may be chosen to be above the temperature of fusion of the polymer to create a polymeric composite which is magnetically separable from other polymers within a solid waste facility, and which may be melted down for recycling purposes. In a variation of this embodiment, a heat actuatable degradation chemical may be dispersed through the polymeric material along with the ferro-magnetic material to create a plastic composite which is selectively degradable by the remote application of microwave energy.
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Clark, Jr. William G.
Junker Warren R.
Shannon Robert E.
Lovering Richard D.
Lynch M. P.
Westinghouse Electric Corp.
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