EP0357008A2
Expired / Lapsed
EP
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Microwave interactive coating compositions and heating elements
Assignee: Fort James Corp
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Filing: 1989-08-30
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Granted: —
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Expires: 2009-08-30
Abstract
Abstract A microwave interactive coating composition and microwave reactive paper and paperboard heaters comprising the coating composition are disclosed. The coating compositions which comprise finely divided carbon, a finely divided microwave reactive metallic component, a powdered inert solid and a binder are capable of producing microwave reactive heaters comparable to those produced by vapor deposition of metals on a carrier film.
Inventors
- 👤 Kenneth A. Pollart
- 👤 Terrence P. Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 06:25
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; C; C09; C09D; C09D5/00; C09D5/38; H; H01; H01C; H01C7/00; H01C7/02; H01C7/027; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3439; B65D2581/3447; B65D2581/3448; B65D2581/3463; B65D2581/3464; B65D2581/3471; B65D2581/3472; B65D2581/3479; B65D2581/3483; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1307; Y10T428/25; Y10T428/256; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
38 words
A microwave interactive coating composition comprising finely divided carbon, a dielectric binder and one or both of the following components: a finely divided inert solid temperature moderator material, and at least one finely divided microwave reactive metallic component.
Claim 2
Dependent Claim
38 words
A microwave interactive coating composition comprising finely divided carbon, a dielectric binder and one or both of the following components: a finely divided inert solid temperature moderator material, and at least one finely divided microwave reactive metallic component.
Claim 3
Dependent Claim
62 words
A microwave interactive coating composition as defined in Claim 1 wherein said metallic component is selected from the group consisting of aluminum, tin, bronze and nickel, wherein said inert solid is selected from the group consisting of alumina, alumina hydrate, silica, titanium oxides, aluminosilicates, clay, and calcium carbonate, and wherein said binder is a water based latex emulsion or an acrylic latex.
Claim 4
Dependent Claim
20 words
A microwave interactive coating composition as defined in Claim 1 or 2 wherein said carbon is graphite or carbon black.
Claim 5
Dependent Claim
35 words
A microwave interactive coating composition as defined in any of the Claims 1 to 3 wherein the ratio of binder solids to other solid components is in the range of about 0.3:1 to about 1:1.
Claim 6
Dependent Claim
22 words
A microwave interactive coating composition as defined in any of the Claims 1 to 4 wherein the metallic component is aluminum flake.
Claim 7
Dependent Claim
28 words
A microwave interactive coating composition as defined in Claim 5 wherein the relative proportions of aluminum to carbon by weight is within the range of 1:2 to 2:1.
Claim 8
Dependent Claim
40 words
A microwave interactive coating composition as defined in Claim 1 wherein the particulate inert solid content is in the range of from about 10 to about 35 percent by weight of the total weight of the solids in the composition.
Claim 9
Dependent Claim
24 words
A microwave interactive heating element comprising a microwave transparent substrate coated with a microwave interactive coating composition according to any of the preceding Claims.
Claim 10
Dependent Claim
34 words
A microwave interactive heating element as defined in Claim 8 wherein said substrate is paper or paperboard, a nonwoven or a heat stable polyester film laminated on a support structure of paper or paperboard.
Claim 11
Dependent Claim
74 words
A microwave interactive heating element as defined in Claim 8 or 9 comprising paper or paperboard coated with from about 3.26 to about 32.6 g/m ² of a microwave interactive composition comprising from about 15 to about 30 weight percent carbon black, from about 15 to about 30 percent by weight aluminum flake, from about 10 to about 35 weight percent inert pigment and from about 30 to about 40 weight percent acrylic solids.
References Cited (Backward Citations)
No citation records indexed.
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