US4643953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic shielded body
Assignee: Dow Chemical Co
•
Filing: 1986-03-31
•
Granted: 1987-02-17
•
Expires: 2006-03-31
Abstract
Abstract An electromagnetic shielded body comprising laminating or adhering to the surface of the body or incorporating as an internal lamina of a multiple laminar body a layer of film or powder of an electroconductive material which consists of a dehydrohalogenated haloorganic polymer or copolymeric material prepared by dehydrohalogenating said haloorganic polymeric material in the presence of at least one-half mole of a liquid or solution of an amine per mole of halogen moiety in said polymeric material at from 15° C. to about 205° C. for from about 2 minutes to about 14 days.
Inventors
- 👤 Arthur E. Gurgiolo
- 👤 Marvin E. Winquist
- 👤 Thomas M. Knobel
- 👤 Dale C. Teeters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:34
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/0083; C; C08; C08F; C08F8/00; C08F8/26; C08J; C08J7/00; C08J7/12; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; H01B1/124; H01B1/125; H01R; H01R13/00; H01R13/648; H01R13/658; H01R13/6598; H01R13/6599; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
An electromagnetic shielded body comprising incorporating as an internal lamina of a multiple laminar body a layer of film or powder of an electroconductive material which consists of a dehydrohalogenated haloorganic polymer or copolymeric material prepared by dehydrohalogenating said haloorganic polymeric material in the presence of at least one-half mole of a liquid or solution of an amine per mole of halogen moiety in said polymeric material at from 15° C. to about 250° C. for from about 2 minutes to about 14 days.
Claim 2
Dependent Claim
84 words
An electromagnetic shielded body comprising incorporating as an internal lamina of a multiple laminar body a layer of film or powder of an electroconductive material which consists of a dehydrohalogenated haloorganic polymer or copolymeric material prepared by dehydrohalogenating said haloorganic polymeric material in the presence of at least one-half mole of a liquid or solution of an amine per mole of halogen moiety in said polymeric material at from 15° C. to about 250° C. for from about 2 minutes to about 14 days.
Claim 3
Dependent Claim
50 words
The electromagnetic shielded body of claim 1 wherein said organic polymeric materials are prepared by conducting a halogen-containing polymeric material with a liquid or vapor containing an amine for at least 2 minutes at from about 15° C. to about 250° C. to at least partially dehydrohalogenate the polymeric material.
Claim 4
Dependent Claim
32 words
The electromagnetic shield material of claim 2 wherein an additional step of treating said dehydrohalogenated polymeric material with a Lewis acid, a halogen or a metal alkali is carried out following dehydrohalogenation.
Claim 5
Dependent Claim
38 words
The electromagnetic shielded body of claim 1 wherein the amine is an aliphatic amine having one to eighteen carbon atoms in each aliphatic moiety, and each aliphatic moiety, if more than 1, is selected independent of the other.
Claim 6
Dependent Claim
14 words
The electromagnetic shielded body of claim 1 wherein the amine is an aromatic amine.
Claim 7
Dependent Claim
13 words
The electromagnetic shielded body of claim 1 wherein the polymeric material is polyvinylchloride.
Claim 8
Dependent Claim
12 words
The electromagnetic shielded body of claim 1 wherein said amine is triethylamine.
Claim 9
Dependent Claim
11 words
The electromagnetic shielded body of claim 1 said amine is triethanolamine.
Claim 10
Dependent Claim
12 words
The electromagnetic shielded body of claim 1 wherein said amine is morpholine.
Claim 11
Dependent Claim
18 words
The electromagnetic shielded body of claim 1 wherein the polymer is a copolymer of vinylchloride and vinylidene chloride.
Claim 12
Dependent Claim
12 words
The electromagnetic shielded body of claim 1 wherein said amine is diethylenetriamine.
Claim 13
Dependent Claim
12 words
The electromagnetic shielded body of claim 1 wherein said amine is triethylamine.
Claim 14
Dependent Claim
13 words
The electromagnetic shielded body of claim 1 wherein the polymer is poly(vinylidene chloride).
Claim 15
Dependent Claim
33 words
The electromagnetic shielded body of claim 1 wherein the polymer is a copolymer of vinylidene chloride and another vinyl monomer selected from the group consisting of methyl acrylate, acrylonitrile, ethylacrylate, and vinylidene chloride.
Claim 16
Dependent Claim
72 words
The product of claim 1 wherein the electromagnetic shield is produced by the method of claim 1 wherein the polymeric material is polyvinyl chloride, and the amine is triethylamine and the temperature of treatment is 140° C. for 48 hours, the product washed with water, then alcohol, then dried followed by heating to 170° C. to initiate an exotherm to 220° C. and held thereat until no vapors of HCl are detected.
Claim 17
Dependent Claim
49 words
The product of claim 1 wherein the electromagnetic shield is produced by the method of claim 1 wherein the polymeric material is polyvinyl chloride, and the amine is triethylamine and the temperature of treatment is 140° C. for 48 hours, the product washed with water, then alcohol, then dried.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |