US4970193A
Expired / Lapsed
US
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Developer composition having improved blocking resistance
Assignee: Mead Corp
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Filing: 1988-09-16
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Granted: 1990-11-13
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Expires: 2008-09-16
Abstract
Abstract A developer composition having improved resistance to vinyl blocking comprising a finely divided thermoplastic phenolic resin and a finely divided thermoplastic vinylic or acrylic resin; the vinylic or acrylic resin is prepared from a monomer composition containing a polar monomer which renders the composition resistant to vinyl plasticizers; developer sheets prepared from the developer composition and processes for forming images utilizing the developer composition are disclosed.
Inventors
- 👤 Rong-Chang Liang
- 👤 Carolyn Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:11
CPC Classifications
G; G03; G03C; G03C7/00; G03F; G03F7/00; G03F7/002; B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
123 words
A process for forming images which comprises image-wise transferring a color precursor to the reactive surface of a developer sheet comprising a support having a layer of a developer composition on the surface thereof, said composition comprising first and second developer polymers, said first polymer being a finely divided thermoplastic phenolic resin and said second polymer being a finely divided thermoplastic vinylic or acrylic resin, said second polymer being prepared from a monomer composition containing a polar monomer and a polyfunctional monomer, and said first and second polymers being sufficiently compatible that upon heating they coalesce to form a film, said film having vinyl blocking resistance; and heating said developer sheet to coalesce said first and second polymers and thereby form said film.
Claim 2
Dependent Claim
123 words
A process for forming images which comprises image-wise transferring a color precursor to the reactive surface of a developer sheet comprising a support having a layer of a developer composition on the surface thereof, said composition comprising first and second developer polymers, said first polymer being a finely divided thermoplastic phenolic resin and said second polymer being a finely divided thermoplastic vinylic or acrylic resin, said second polymer being prepared from a monomer composition containing a polar monomer and a polyfunctional monomer, and said first and second polymers being sufficiently compatible that upon heating they coalesce to form a film, said film having vinyl blocking resistance; and heating said developer sheet to coalesce said first and second polymers and thereby form said film.
Claim 3
Dependent Claim
47 words
The process of claim 1 where said monomer composition includes a monomer selected from the group consisting of acrylic acid, methacrylic acid, alkyl acrylates, alkyl methacrylates, hydroxy alkyl (meth)acrylates, styrene sulfonate salts, vinyl sulfonate salts, vinylbenzoic acid, acryloxloyl monophthalate, o-acryloxloyl benzoic acid, vinyl acetate, and vinylidene chloride.
Claim 4
Dependent Claim
11 words
The process of claim 2 wherein said polar monomer is acrylonitrile.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein said polyfunctional monomer is a difunctional monomer.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein said difunctional monomer is divinyl benzene.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein said monomer composition additionally includes styrene.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein the ratio of said first polymer to said second polymer is about 90/10 to 40/60 based on dry weight.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein said developer additionally contains 10 to 30% by weight of zinc salicylate.
Claim 10
Dependent Claim
42 words
The process of claim 1 wherein said second polymer is prepared by emulsion polymerization and has a core portion and a shell portion and said shell portion is formed from a vinylic or acrylic resin which is compatible with said first polymer.
Claim 11
Dependent Claim
34 words
The process of claim 9 wherein said core portion is formed from a polymer having a melt flow temperature which is less than the melt flow temperature of the polymer forming said shell portion.
Claim 12
Dependent Claim
14 words
The process of claim 10 wherein said first polymer is a metallated phenol-formaldehyde resin.
Claim 13
Dependent Claim
19 words
The process of claim 10 wherein said first polymer is formed by oxidatively coupling a phenol or a biphenol.
Claim 14
Dependent Claim
24 words
The process of claim 1 wherein said first polymer and said second developer material have a particle size of about 0.5 to 25 microns.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein said acrylic or vinylic polymer has a melt flow temperature of about 80° C. to 130° C.
Claim 16
Dependent Claim
22 words
The process of claim 14 wherein said first polymer and said second polymer exhibit a minimum film-forming temperature greater than 60° C.
Claim 17
Dependent Claim
71 words
The process of claim 1 wherein said step of imagewise transferring said color precursor includes exposing to actinic radiation a photosensitive material comprising a support having a layer of microcapsules on the surface thereof, said microcapsules containing a photohardenable composition and a color precursor, subjecting said layer microcapsules to a uniform rupturing force such that said microcapsules image-wise release said color precursor to said developer material whereupon an image is formed.
Claim 18
Dependent Claim
14 words
The process of claim 16 wherein said microcapsules are present on said developer sheet.
Claim 19
Dependent Claim
22 words
The process of claim 16 wherein said layer of microcapsule is present on a sheet separate and distinct from said developer sheet.
Claim 20
Dependent Claim
90 words
A developer sheet comprising a support having a layer of a developer composition on the surface thereof, said developer composition comprising first and second polymers, said first polymer being a finely divided thermoplastic phenolic resin and said second polymer being a finely divided thermoplastic vinylic or acrylic resin, said second polymer being prepared from a monomer composition containing a polar monomer and a polyfunctional monomer, and said first and second polymers being sufficiently compatible that upon heating they coalesce to form a continuous film, said film having vinyl blocking resistance.
Claim 21
Dependent Claim
90 words
A developer sheet comprising a support having a layer of a developer composition on the surface thereof, said developer composition comprising first and second polymers, said first polymer being a finely divided thermoplastic phenolic resin and said second polymer being a finely divided thermoplastic vinylic or acrylic resin, said second polymer being prepared from a monomer composition containing a polar monomer and a polyfunctional monomer, and said first and second polymers being sufficiently compatible that upon heating they coalesce to form a continuous film, said film having vinyl blocking resistance.
Claim 22
Dependent Claim
11 words
A photosensitive recording material including the developer sheet of claim 19.
Claim 23
Dependent Claim
48 words
The developer sheet of claim 19 wherein said monomer composition includes a monomer selected from the group consisting of acrylic acid, methacrylic acid, alkyl acrylates, alkyl methacrylates, hydroxy alkyl (meth)acrylates, styrene sulfonate salts, vinyl sulfonate salts, vinylbenzoic acid, acryloxloyl monophthalate, o-acryloxloyl benzoic acid, vinyl acetate, and vinylidene chloride.
Claim 24
Dependent Claim
12 words
The developer sheet of claim 21 wherein said polar monomer is acrylonitrile.
Claim 25
Dependent Claim
14 words
The developer sheet of claim 22 wherein said polyfunctional monomer is a difunctional monomer.
Claim 26
Dependent Claim
12 words
The developer sheet of claim 23 wherein said difunctional monomer is divinylbenzene.
Claim 27
Dependent Claim
13 words
The developer sheet of claim 24 wherein said monomer composition additionally includes styrene.
Claim 28
Dependent Claim
28 words
The developer sheet of claim 24 wherein the ratio of said first developer material to said second developer material is about 90/10 to 40/60 based on dry weight.
Claim 29
Dependent Claim
45 words
The developer sheet of claim 19 wherein said second developer material is prepared by emulsion polymerization and has a core portion and a shell portion and said shell portion is formed from a vinylic or acrylic resin which is compatible with said first developer material.
Claim 30
Dependent Claim
35 words
The developer sheet of claim 27 wherein said core portion is formed from a polymer having a melt flow temperature which is less than the melt flow temperature of the polymer forming said shell portion.
Claim 31
Dependent Claim
16 words
The developer sheet of claim 28 wherein said first developer material is a metallated phenol-formaldehyde resin.
Claim 32
Dependent Claim
21 words
The developer sheet of claim 28 wherein said first developer material is formed by oxidatively coupling a phenol or a biphenol.
Claim 33
Dependent Claim
26 words
The developer sheet of claim 19 wherein said first developer material and said second developer material have a particle size of about 0.1 to 25 microns.
Claim 34
Dependent Claim
24 words
The developer sheet of claim 19 wherein said acrylic or vinylic polymer has a melt flow temperature of about 80° C. to 130° C.
Claim 35
Dependent Claim
25 words
The developer sheet of claim 32 wherein said first developer material and said second developer material exhibit a minimum film-forming temperature greater than 60° C.
References Cited (Backward Citations)
US4772532A
Cited
US4853364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |