US4596733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroerosion recording material with polyorganosiloxane overlayer
Assignee: IBM Information Products Corp
•
Filing: 1983-12-30
•
Granted: 1986-06-24
•
Expires: 2003-12-30
Abstract
Abstract For high speed electroerosion recording, this invention provides a polyorganosiloxane overlayer which includes high lubricity solid particles as a filler. The overlayer provides a combination lubricant and protective layer for the thin metal layer which is removed by electroerosion to prevent damage for the areas not removed by electroerosion. The polyorganosiloxane overlayer is preferably crosslinked, and is relatively hard, durable, and especially resistant to thermal degradation by the electroerosion arcing. This is important to avoid debris buildup at the recording electrodes resulting from the high temperature arcing for removal of the overlayer in the areas where recording takes place.
Inventors
- 👤 Mitchell S. Cohen
- 👤 Keith S. Pennington
- 👤 Krishna G. Sachdev
- 👤 William D. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/24; B41M5/245; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
An improved electroerosion recording material comprising a non-conductive support member, a thin layer of conductive material supported upon said support member and being removable by evaporation during electroerosion recording, an overlayer of protective lubricant composition on the stylus-contacting surface of said material, said lubricant composition comprising particles of high lubricity dispersed in a solid polyorganosiloxane binder, said polyorganosiloxane binder consisting predominately of a polymerization product of at least one trialkoxysilane monomer, the thickness of the overlayer corresponding to at least an average weight of about 2 micrograms per square centimeter.
Claim 2
Dependent Claim
90 words
An improved electroerosion recording material comprising a non-conductive support member, a thin layer of conductive material supported upon said support member and being removable by evaporation during electroerosion recording, an overlayer of protective lubricant composition on the stylus-contacting surface of said material, said lubricant composition comprising particles of high lubricity dispersed in a solid polyorganosiloxane binder, said polyorganosiloxane binder consisting predominately of a polymerization product of at least one trialkoxysilane monomer, the thickness of the overlayer corresponding to at least an average weight of about 2 micrograms per square centimeter.
Claim 3
Dependent Claim
37 words
A material as claimed in claim 1, wherein the high lubricity particles are selected from the group consisting of ZnO, MoS 2 , CaF 2 , PbO, Sn, Cu, Zn, Ag, Pb, Au, Bi, Al, and graphite.
Claim 4
Dependent Claim
32 words
A material as claimed in claim 1 or claim 2, wherein said layer of conductive material consists essentially of aluminum which is in the range from 100 to 500 Angstroms in thickness.
Claim 5
Dependent Claim
27 words
A material as claimed in claim 1 or claim 2, wherein the amount of binder in said overlayer is from 20 percent to 50 percent by weight.
Claim 6
Dependent Claim
33 words
A material as claimed in claim 1 or claim 2, wherein the thickness of said overlayer is in the range corresponding to an average weight of 2 to 15 micrograms per square centimeter.
Claim 7
Dependent Claim
69 words
A material as claimed in claim 1, wherein said trialkoxysilane monomers are selected from the group defined by the following ##STR5## where R is --CH 3 , --C 2 H 5 , --C 3 H 7 , --CH 2 CH 2 CF 3 , --C 6 H 5 , or --CH═CH 2 , and where R', R", and R"' each equal CH 3 or C 2 H 5 .
Claim 8
Dependent Claim
25 words
A material as claimed in claim 6, wherein said polyorganosilane consists essentially of a polymerization product of methyltriethoxysilane with a molecular weight of about 12,000.
Claim 9
Dependent Claim
21 words
A material as claimed in claim 1 including a crosslinking agent for said polyorganosiloxane consisting essentially of at least one silane.
Claim 10
Dependent Claim
14 words
A material as claimed in claim 8, wherein said polyorganosiloxane is crosslinked with gamma-aminopropyltriethoxysilane.
Claim 11
Dependent Claim
53 words
An improved electroerosion recording material as claimed in claim 1, wherein said polyorganosiloxane consists essentially of a polymerization product of at least one trialkoxysilane monomer in combination with a lesser amount of at least one dialkoxysilane monomer, said polyorganosiloxane being crosslinked and modified with at least one agent consisting essentially of a silane.
Claim 12
Dependent Claim
71 words
A material as claimed in claim 10, wherein the dialkoxysilane monomer is selected from the group defined by the following formula: ##STR6## where R 1 , R 2 each equal --CH 3 , --C 2 H 5 , --CH 2 CH 2 CF 3 , --C 6 H 5 , or --CH═CH 2 , and where R 3 , R 4 each equal --CH 3 or --C 2 H 5 .
Claim 13
Dependent Claim
27 words
A material as claimed in claim 10, wherein the initial proportion of trialkoxysilane monomer is about 80% and the initial proportion of dialkoxysilane monomer is about 20%.
Claim 14
Dependent Claim
19 words
A material as claimed in claim 1 or claim 5, wherein said particles of high lubricity are electrically conductive.
Claim 15
Dependent Claim
82 words
A material as claimed in claim 12, wherein the polymerization product of the trialkoxysilane monomer and the dialkoxysilane monomer is defined by the following formula: ##STR7## where n equals 5 to 50, and R, in each of the six sites, represents any one of the following listed hydrocarbon radicals, the hydrocarbon radicals being present in weight proportions as given in the following table: ______________________________________
Hydrocarbon Radical
Weight in Percent
______________________________________
--CH.sub.3 70
--C.sub.6 H.sub.5
15
--CH.sub.2 CH.sub.2 CF.sub.3
10
--CH═CH.sub.2
5.
______________________________________
Claim 16
Dependent Claim
40 words
A material as claimed in claim 12, further comprising a thin, hard layer of crosslinked polymer between said support member and said conductive layer, said polymer layer serving to increase the resistance to scratching of said material during electroerosion recording.
Claim 17
Dependent Claim
26 words
The material as claimed in claim 15, wherein said layer of crosslinked polymer between said support member and said conductive layer is filled with silica particles.
Claim 18
Dependent Claim
56 words
A material as claimed in claim 10 or claim 14, wherein said silane is defined by the following formula: ##STR8## where X equals --NH 2 , --NHCH 3 , --N(CH 2 CH 2 OH) 2 , or --N(CH 2 CH 2 ) 2 O, and R equals --CH 3 , or --C 2 H 5 .
Claim 19
Dependent Claim
27 words
A recording material as claimed in claim 10 or claim 14, wherein said silane is selected from the following group of materials: Bis(2-hydroxyethyl)aminopropyltriethoxysilane, N-(3-trimethoxysilylpropyl)morpholine, gamma-Aminopropyltriethoxysilane, and gama-N-Methylaminopropyltrimethoxysilane.
Claim 20
Dependent Claim
22 words
A material as claimed in claim 10 or claim 14, wherein said high lubricity particles are conductive and consist essentially of graphite.
Claim 21
Dependent Claim
22 words
A material as claimed in claim 10 or 8, wherein said high lubricity particles are conductive and consist essentially of conductive ZnO.
References Cited (Backward Citations)
US2555321A
Cited
US3125021A
Cited
US3242075A
Cited
US3511700A
Cited
US3514325A
Cited
US3740254A
Cited
US3861952A
Cited
US3786518A
Cited
US4206256A
Cited
US4069360A
Cited
US4305082A
Cited
US4152487A
Cited
US4486503A
Cited
US4380558A
Cited
US4400706A
Cited
US4339758A
Cited
US4488158A
Cited
US4473676A
Cited
US4492733A
Cited
US4479851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |