US3930101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic pigment-loaded polymeric microcapsular system
Assignee: Champion International Corp
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Filing: 1974-06-03
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Granted: 1975-12-30
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Expires: 1994-06-03
Abstract
Abstract Opacifying pigment particles consisting essentially of discrete, substantially spherical microcapsules each having a solid, polymeric shell and a solid, polymeric core are provided wherein discrete, inorganic pigment particles are dispersed in the polymeric core of the microcapsules. The inorganic pigment-loaded microcapsules are capable of providing a high degree of opacity and a predetermined degree of glossiness to a given substrate by varying the size of the microcapsules. In addition, the inorganic pigment-loaded microcapsules are retained by fibrous substrates to a much greater extent than are inorganic pigments per se.
Inventors
- 👤 David N Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:28
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; B; B41; B41M; B41M5/00; B41M5/124; B41M5/1243; C08; C08F; C08F251/00; C08F261/00; C08F261/02; C08F261/04; C08F291/00; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/60; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31942; Y10T428/31949
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
A COATED PAPER SHEET HAVING IMPROVED OPACITY, SAID SHEET COMPRISING A CELLULOSIC WEB COATED WITH A COATING COMPOSITION, SAID COATING COMPOSITION COMPRISING OPACIFYING PIGMENT PARTICLES CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPHERICAL MICROCAPSULES, SAID MICROCAPSULES HAVING A SOLID, POLYMERIC SHELL AND A SOLID, POLYMERIC CORE, SAID POLYMERIC CORE HAVING DISCRETE, INORGANIC PIGMENT PARTICLES DISPERSED THEREIN, SAID POLYMERIC SHELL AND SAID POLYMERIC CORE BEING FORMED OF DIFFERENT POLYMERIC MATERIALS.
Claim 2
Dependent Claim
67 words
A COATED PAPER SHEET HAVING IMPROVED OPACITY, SAID SHEET COMPRISING A CELLULOSIC WEB COATED WITH A COATING COMPOSITION, SAID COATING COMPOSITION COMPRISING OPACIFYING PIGMENT PARTICLES CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPHERICAL MICROCAPSULES, SAID MICROCAPSULES HAVING A SOLID, POLYMERIC SHELL AND A SOLID, POLYMERIC CORE, SAID POLYMERIC CORE HAVING DISCRETE, INORGANIC PIGMENT PARTICLES DISPERSED THEREIN, SAID POLYMERIC SHELL AND SAID POLYMERIC CORE BEING FORMED OF DIFFERENT POLYMERIC MATERIALS.
Claim 3
Dependent Claim
79 words
A RECORD SHEET WHICH COMPRISES A SUBSTRATE HAVING A COATING ON A SURFACE THEREOF, WHICH COATING COMPRISES PRESSURE-RUPTURABLE, IMAGE-FORMING MICROCAPSULES AND MICROCAPSULAR LOAD-BEARING AGENTS, SAID LOAD-BEARING AGENTS CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPERICAL, NON-PRESSURERUPTURABLE MICROCAPSULES HAVING A SOLID, POLYMERIC SHELL AND A SOLID, POLYMERIC CORE, SAID POLYMERIC CORE CONTAINING IORGANIC PIGMENT PARTICLES DISPERSED THEREIN, SAID LOAD-BEARING AGENTS HAVING AN AVERAGE DIAMETER GREATER THAN THAT OF SAID IMAGE-FORMING MICROCAPSULES AND AT LEAST AS GREAT AS THE THICKNESS OF SAID COATING.
Claim 4
Dependent Claim
79 words
A RECORD SHEET WHICH COMPRISES A SUBSTRATE HAVING A COATING ON A SURFACE THEREOF, WHICH COATING COMPRISES PRESSURE-RUPTURABLE, IMAGE-FORMING MICROCAPSULES AND MICROCAPSULAR LOAD-BEARING AGENTS, SAID LOAD-BEARING AGENTS CONSISTING ESSENTIALLY OF DISCRETE, SUBSTANTIALLY SPERICAL, NON-PRESSURERUPTURABLE MICROCAPSULES HAVING A SOLID, POLYMERIC SHELL AND A SOLID, POLYMERIC CORE, SAID POLYMERIC CORE CONTAINING IORGANIC PIGMENT PARTICLES DISPERSED THEREIN, SAID LOAD-BEARING AGENTS HAVING AN AVERAGE DIAMETER GREATER THAN THAT OF SAID IMAGE-FORMING MICROCAPSULES AND AT LEAST AS GREAT AS THE THICKNESS OF SAID COATING.
Claim 5
Dependent Claim
26 words
The record sheet of claim 2 wherein said pigmented, load-bearing agents have an average diameter in the range of between about 15 and about 30 microns.
Claim 6
Dependent Claim
13 words
The record sheet of claim 2 wherein said pigment particles are titanium dioxide.
Claim 7
Dependent Claim
20 words
The record sheet of claim 2 wherein said polymeric shell and said polymeric core are formed of different polymeric materials.
Claim 8
Dependent Claim
21 words
The record sheet of claim 5 wherein said solid polymeric core is at least partially grafted to said solid polymeric shell.
Claim 9
Dependent Claim
19 words
The record sheet of claim 6 wherein said grafting is between about 20 and about 80 percent by weight.
Claim 10
Dependent Claim
20 words
The record sheet of claim 2 wherein said load-bearing agent has a polymeric shell material formed of an hydroxylated polymer.
Claim 11
Dependent Claim
13 words
The record sheet of claim 8 wherein said hydroxylated polymer is polyvinyl alcohol.
Claim 12
Dependent Claim
28 words
The record sheet of claim 2 wherein said inorganic pigment is a member selected from the group consisting of titanium dioxide, barium sulfate, calcium carbonate and carbon black.
Claim 13
Dependent Claim
11 words
The record sheet of claim 2 wherein said substrate is paper.
Claim 14
Dependent Claim
21 words
The coated sheet of claim 1 wherein said solid polymeric core is at least partially grafted to said solid polymeric shell.
Claim 15
Dependent Claim
19 words
The coated sheet of claim 12 wherein said grafting is between about 20 and about 80 percent by weight.
Claim 16
Dependent Claim
25 words
The coated sheet of claim 1 wherein said microcapsules have an average particle diameter in the range of between about 10 and about 50 microns.
Claim 17
Dependent Claim
25 words
The coated sheet of claim 14 wherein said microcapsules have an average particle diameter in the range of between about 10 and about 50 microns.
Claim 18
Dependent Claim
14 words
The coated sheet of claim 1 wherein said polymeric shell is an hydroxylated polymer.
Claim 19
Dependent Claim
17 words
The coated sheet of claim 16 wherein said polymer is benzyl starch, methyl cellulose or polyvinyl alcohol.
Claim 20
Dependent Claim
13 words
The coated sheet of claim 17 wherein said hydroxylated polymer is polyvinyl alcohol.
Claim 21
Dependent Claim
11 words
The coated sheet of claim 18 wherein said core is polystyrene.
Claim 22
Dependent Claim
28 words
The coated sheet of claim 1 wherein said inorganic pigmenT is a member selected from the group consisting of titanium dioxide, barium sulfate, calcium carbonate and carbon black.
Claim 23
Dependent Claim
13 words
The coated sheet of claim 20 wherein said inorganic pigment is titanium dioxide.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |