Compositions – Electrically conductive or emissive compositions – Elemental carbon containing
Patent
1998-09-14
2000-07-11
Kopec, Mark
Compositions
Electrically conductive or emissive compositions
Elemental carbon containing
219209, 106472, H01B 124, H05B 314
Patent
active
060867914
ABSTRACT:
The present invention is based on the discovery that different carbon components are required in an electrically conductive exothermic coating in order to avoid break-down and especially if a constant temperature is to be maintained by the coating (self-regulating embodiment). It has been discovered that graphite permits heat to be generated by the coating when energized with a.c. power; however, the heat tends to run away which results in a break down of the coating. Carbon, on the other hand, permits more electrical conductivity by the coating. Both the graphite and carbon should be flake-like in structure. Such a combination of flake-like graphite and carbon pigments in particles sizes of about 5.mu. to 500.mu. should be used. The amount of such pigments should range from about 10 and 20 weight-% based on the non-volatile solids content of the coating formulation (e.g., without solvent and other components that evolve from the coating during drying and curing operations). In order to make a self-regulating coating (i.e., a coating that will maintain a constant temperature without breakdown), non-conductive flake-like graphite pigment should be added to the formulation. In order to increase the heat emitted by the novel coatings, additional conventional spherical carbon (up to a 1/3 replacement of the flake-like particle content) can be added to the formulation.
REFERENCES:
patent: 3912668 (1975-10-01), Neumann et al.
patent: 3923697 (1975-12-01), Ellis
patent: 3999040 (1976-12-01), Ellis
patent: 4064074 (1977-12-01), Ellis
patent: 4624798 (1986-11-01), Gindrup et al.
patent: 4714569 (1987-12-01), Nishino et al.
patent: 4857384 (1989-08-01), Mio et al.
patent: 5075036 (1991-12-01), Parish et al.
patent: 5242511 (1993-09-01), Yokoyama et al.
patent: 5248517 (1993-09-01), Shrier et al.
patent: 5334330 (1994-08-01), Rowlette
patent: 5372749 (1994-12-01), Li et al.
patent: 5378533 (1995-01-01), Ota
patent: 5407741 (1995-04-01), Ota
patent: 5425969 (1995-06-01), Wakabayashi et al.
patent: 5516546 (1996-05-01), Hari et al.
patent: 5549849 (1996-08-01), Namura et al.
patent: 5556576 (1996-09-01), Kim et al.
patent: 5567357 (1996-10-01), Wakita
patent: 5575954 (1996-11-01), Mahabandi et al
patent: 5591382 (1997-01-01), Nahass et al.
patent: 5733480 (1998-03-01), Lee et al.
Kopec Mark
Progressive Coatings, Inc.
LandOfFree
Electrically conductive exothermic coatings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrically conductive exothermic coatings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrically conductive exothermic coatings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-538654