Patent US5070644A successfully refreshed from Google Patents.
EP0055992A2
Expired / Lapsed
EP
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Composition for a toner of a magnetic resist printing process
Assignee: EIDP Inc
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Filing: 1979-03-26
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Granted: —
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Expires: 1999-03-26
Abstract
Abstract A composition for a toner of a magnetic resist printing process has an average size of up to 30 µm and consists of a thermoplastic resin and a magnetic material in particulate form which can be used for a process and an apparatus as described in the original application 79 100 892.3.
Inventors
- 👤 George Raymond Nacci
- 👤 Donald George Pye
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 05:24
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/061; H05K3/065; G; G03; G03G; G03G13/00; G03G13/26; G03G19/00; G03G9/00; G03G9/08; G03G9/083; G03G9/0838
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
147 words
1 . A dry particulate resist composition of particles having an average size up to 30 µm for substantially instantaneous application to a heated surface to form a resist image capable of withstanding modification of the exposed area of said surface, comprising a) binder consisting essentially of a thermoplastic resin and up to 40% based on the weight of said binder of plastizicer for said resin, and b) magnetic material in particulate form present in said binder rendering the particles of said composition magnetically atrractible, the combination of said binder and said magnetic material in said particles rendering them substantially non-blocking at ordinary room temperature and being adherent to said surface and coalescible thereon upon said application to said surface to form resist image, said magnetic material constituting from 40 to 80% by weight of the combination of a) plus b) and said binder constituting the remainder.
Claim 2
Dependent Claim
147 words
1 . A dry particulate resist composition of particles having an average size up to 30 µm for substantially instantaneous application to a heated surface to form a resist image capable of withstanding modification of the exposed area of said surface, comprising a) binder consisting essentially of a thermoplastic resin and up to 40% based on the weight of said binder of plastizicer for said resin, and b) magnetic material in particulate form present in said binder rendering the particles of said composition magnetically atrractible, the combination of said binder and said magnetic material in said particles rendering them substantially non-blocking at ordinary room temperature and being adherent to said surface and coalescible thereon upon said application to said surface to form resist image, said magnetic material constituting from 40 to 80% by weight of the combination of a) plus b) and said binder constituting the remainder.
Claim 3
Dependent Claim
17 words
The resist composition of Claim 1 having a transfer temperature in the range of 50 to 120°C.
Claim 4
Dependent Claim
16 words
.3. The resist composition of Claim 1 having a melt index of from 1 to 50.
Claim 5
Dependent Claim
16 words
The resist composition of Claim .1 having a glass transition temperature of from 25 to 110°C.
Claim 6
Dependent Claim
23 words
The resist composition of Claim 1 wherein said binder is soluble or swellable in methylene chloride or aqueous alkali at ordinary room temperature.
Claim 7
Dependent Claim
28 words
. The resist composition of Claim 1 wherein said magnetic material is substantially non-porous and isometric in particle shape having an average particle size of 0.1 to lµ.
Claim 8
Dependent Claim
15 words
The resist composition of Claim 1 wherein said magnetic material is a non-conductor of electricity.
Claim 9
Dependent Claim
20 words
The resist composition of Claim 1 wherein said thermoplastic resin has a molecular weight which gives it Newtonian flow character.
Claim 10
Dependent Claim
12 words
The resist composition of Claim 1 wherein said thermoplastic resin is polyester.
Claim 11
Dependent Claim
13 words
The resist composition of Claim 1 wherein said thermoplastic resin is acrylic polymer.
Claim 12
Dependent Claim
17 words
The resist composition of Claim 10 wherein said resin has an acid number of at least 25.
Claim 13
Dependent Claim
151 words
A dry resist composition of particles having an average particle size. of 1 to 30µm, and comprising 35 to 65% by wt. of coalescible binder component and 45 to 65% by weight based on the weight of the composition of magnetic material having an average particle size up to 6um present in said particles, said binder component composed of thermoplastic polyester resin and 5 to 13% by wt. of plasticizer for said resin based on the total weight of said binder component, said composition being non-blocking at ordinary room temperature and resistant to aqueous FeCl 3 etchant and having a melt index of 2 to 100, glass transition temperature of 25 to 110°C and tack transfer temperature of 50 to 110°C and tack transfer window of at least 20°C said resin having a weight average molecular weight of 1,000 to 50,000 and being adherent to copper at said tack transfer temperature.
Claim 14
Dependent Claim
151 words
A dry resist composition of particles having an average particle size. of 1 to 30µm, and comprising 35 to 65% by wt. of coalescible binder component and 45 to 65% by weight based on the weight of the composition of magnetic material having an average particle size up to 6um present in said particles, said binder component composed of thermoplastic polyester resin and 5 to 13% by wt. of plasticizer for said resin based on the total weight of said binder component, said composition being non-blocking at ordinary room temperature and resistant to aqueous FeCl 3 etchant and having a melt index of 2 to 100, glass transition temperature of 25 to 110°C and tack transfer temperature of 50 to 110°C and tack transfer window of at least 20°C said resin having a weight average molecular weight of 1,000 to 50,000 and being adherent to copper at said tack transfer temperature.
References Cited (Backward Citations)
No citation records indexed.
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