US4054540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive resistance and process of making same
Assignee: Dynacon Industries Inc
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Filing: 1975-05-07
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Granted: 1977-10-18
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Expires: 1995-05-07
Abstract
Abstract A pressure sensitive resistance material and process for making the same is described which is of the type comprising an elastomeric matrix with conducting metal particles dispersed therein. Improved performance and improved ranges of conductivity between the no pressure and pressure ranges are obtained by coating the metallic conducting particles with semi-conducting material and further improved results are obtained when the semi-conducting material comprises a reaction product of an organic metal compound with an aryl peroxide of similar aryl compound. The material may be made available as a coating material or as a shaped product.
Inventors
- 👤 Michael Michalchik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01C; H01C10/00; H01C10/10; H01C10/106
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
102 words
A process for manufacturing a pressure sensitive resistance element of the type comprising a discontinuous phase of conducting particles substantially uniformly distributed in a matrix of a cured polymerizable resin comprising 1. providing a polymerizable, elastomeric resin composition of liquid to pasty consistency which is polymerizable with the aid of a polymerizing catalyst 2. providing finely divided metal conducting particles in a ratio of resin:metal conducting particles of about 100:75 to 100:110 by weight 3. coating the particles with a thin layer of a deformable, electrically semi-conducting compound and mixing the particles with the resin composition, and 4. curing the resultant mix.
Claim 2
Dependent Claim
102 words
A process for manufacturing a pressure sensitive resistance element of the type comprising a discontinuous phase of conducting particles substantially uniformly distributed in a matrix of a cured polymerizable resin comprising 1. providing a polymerizable, elastomeric resin composition of liquid to pasty consistency which is polymerizable with the aid of a polymerizing catalyst 2. providing finely divided metal conducting particles in a ratio of resin:metal conducting particles of about 100:75 to 100:110 by weight 3. coating the particles with a thin layer of a deformable, electrically semi-conducting compound and mixing the particles with the resin composition, and 4. curing the resultant mix.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein the elastomeric resin is a silicone resin of the type which is cured by a metal soap and wherein the deformable, electrically semi-conducting compound is the reaction product of a peroxy compound with a metal-organic compound.
Claim 4
Dependent Claim
40 words
The process of claim 1 wherein the elastomeric resin is a silicone resin of the type which is cured by a peroxy compound and the deformable, semi-conducting compound is the reaction product of a peroxy compound with a metal soap.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the metal particles are coated by pretreating with a solution of the deformable, semi-conducting compound.
Claim 6
Dependent Claim
36 words
The process of claim 2 wherein the metal particles are coated by pretreating with a metal-organic compound and then with an aryl peroxy compound to provide a coating of a deformable, semi-conducting compound on the particles.
Claim 7
Dependent Claim
53 words
An electric resistance element which is sensitive to pressure comprising a substantially discontinuous phase of metallic conducting particles in a matrix of a cured elastomeric resin, said metallic conducting particles having a coating of a deformable, semi-conducting compound thereon, the proportion of resin to metal conducting particles being 100:75 to 100:110 by weight.
Claim 8
Dependent Claim
53 words
An electric resistance element which is sensitive to pressure comprising a substantially discontinuous phase of metallic conducting particles in a matrix of a cured elastomeric resin, said metallic conducting particles having a coating of a deformable, semi-conducting compound thereon, the proportion of resin to metal conducting particles being 100:75 to 100:110 by weight.
Claim 9
Dependent Claim
20 words
An electric resistance element as claimed in claim 6 wherein the coating on said metal particles comprises a metallo-organic polymer.
Claim 10
Dependent Claim
27 words
An electric resistance element as claimed in claim 6 wherein the semi-conducting coating on said metal particles comprises a polymer with a series of metal oxygen bonds.
Claim 11
Dependent Claim
23 words
An electric resistance element as claimed in claim 6 wherein the coating on said metal particle comprises a deformable, semi-conducting non-metallic organic compound.
Claim 12
Dependent Claim
29 words
An electric resistance element as claimed in claim 6 wherein the coating on said metal particles comprises a deformable, semi-conducting organic compound which is insoluble in benzene and hexane.
Claim 13
Dependent Claim
19 words
An electric resistance element as claimed in claim 6 wherein the coating on said metal particles comprises glycerophosphoric acid.
Claim 14
Dependent Claim
31 words
The electric resistance element as claimed in claim 6 wherein the metallic conducting particles are coated with a layer of the reaction product of a metal soap and a peroxy compound.
Claim 15
Dependent Claim
27 words
The electric resistance element as claimed in claim 6 wherein the metal conducting particles are coated with the reaction product of tin octoate and a peroxy compound.
Claim 16
Dependent Claim
17 words
The electric resistance element as claimed in claim 6 wherein the elastomeric resin is a silicone resin.
Claim 17
Dependent Claim
66 words
As a composition of matter a flowable composition comprising a continuous phase carrier of resinous insulating material and a dispersed phase of metal conducting particles, said metal particles being coated with a deformable semi-conducting material, said composition being capable of being further congealed whereby it may be coated on regular and irregular surfaces, the proportion of resin to metal particles being 100:75 to 100:110 by weight.
Claim 18
Dependent Claim
66 words
As a composition of matter a flowable composition comprising a continuous phase carrier of resinous insulating material and a dispersed phase of metal conducting particles, said metal particles being coated with a deformable semi-conducting material, said composition being capable of being further congealed whereby it may be coated on regular and irregular surfaces, the proportion of resin to metal particles being 100:75 to 100:110 by weight.
Claim 19
Dependent Claim
115 words
An electric resistance element which is sensitive to pressure and which, in a thickness of about 1/8 inch has a resistance decreasing from about 1 megohm to 100 megohms under no pressure to about 100 to about 0.2 ohm under pressure and comprising a substantially discontinuous phase of metal conducting particles of a size of about 0.1 to 44 microns in a matrix of a cured elastomeric resin, the proportion of resin:conducting particles being about 100:75 to 100: 110 by weight, said metal particles being coated with the reaction product of a metal soap and a peroxy compound, said elastomeric resin being incompletely cured at the interfaces of the metal conducting particles and the resin.
Claim 20
Dependent Claim
115 words
An electric resistance element which is sensitive to pressure and which, in a thickness of about 1/8 inch has a resistance decreasing from about 1 megohm to 100 megohms under no pressure to about 100 to about 0.2 ohm under pressure and comprising a substantially discontinuous phase of metal conducting particles of a size of about 0.1 to 44 microns in a matrix of a cured elastomeric resin, the proportion of resin:conducting particles being about 100:75 to 100: 110 by weight, said metal particles being coated with the reaction product of a metal soap and a peroxy compound, said elastomeric resin being incompletely cured at the interfaces of the metal conducting particles and the resin.
Claim 21
Dependent Claim
17 words
The electric resistance element as claimed in claim 16 wherein the elastomeric resin is a silicone resin.
Claim 22
Dependent Claim
16 words
The electric resistance element as claimed in claim 16 wherein the metal soap is tin octoate.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |