US4435340A
Expired / Lapsed
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Process for preparing microcapsules for pressure sensitive manifold paper
Assignee: New Oji Paper Co Ltd
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Filing: 1982-01-20
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Granted: 1984-03-06
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Expires: 2002-01-20
Abstract
Abstract A process for preparing microcapsules for pressure sensitive manifold paper characterized by emulsifying in a hydrophilic liquid a hydrophobic liquid containing an aromatic isocyanate represented by the formula <IMAGE> wherein n is an integer of 1 to 10, an aliphatic isocyanate and an electron donating organic chromogenic material, and forming a polymer at the interface to cover hydrophobic liquid droplets with the polymer.
Inventors
- 👤 Tetsuro Horiike
- 👤 Takio Kuroda
- 👤 Tomoharu Shiozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A process for preparing microcapsules for pressure sensitive manifold paper characterized by emulsifying in a hydrophilic liquid a hydrophobic liquid containing an aromatic isocyanate repesented by the formula ##STR6## wherein n is an integer of 1 to 10, an aliphatic isocyanate and an electron donated organic chromogenic material, and forming a polymer at the interface to cover hydrophobic liquid droplets with the polymer, the aromatic isocyanate and the aliphatic isocyanate being used in the ratio of 1:0.05-20 by weight.
Claim 2
Dependent Claim
79 words
A process for preparing microcapsules for pressure sensitive manifold paper characterized by emulsifying in a hydrophilic liquid a hydrophobic liquid containing an aromatic isocyanate repesented by the formula ##STR6## wherein n is an integer of 1 to 10, an aliphatic isocyanate and an electron donated organic chromogenic material, and forming a polymer at the interface to cover hydrophobic liquid droplets with the polymer, the aromatic isocyanate and the aliphatic isocyanate being used in the ratio of 1:0.05-20 by weight.
Claim 3
Dependent Claim
14 words
A process as defined in claim 1 wherein the ratio is 1:0.1-10 by weight.
Claim 4
Dependent Claim
13 words
A process as defined in claim 1 wherein n is 1 to 5.
Claim 5
Dependent Claim
52 words
A process as defined in claim 1 wherein a polyamine is added to the hydrophilic liquid after the hydrophobic liquid has been emulsified therein, the polyamine being used in an amount of 0.1 to 200 parts by weight per 100 parts by weight of the aromatic isocyanate and the aliphatic isocyanate combined.
Claim 6
Dependent Claim
35 words
A process as defined in claim 4 wherein the polyamine is at least one amine selected from the group consisting of aliphatic polyamines, adducts of aliphatic polyamines and epoxy compounds, alicyclic polyamines and heterocyclic diamines.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |