Patent US3114692A successfully refreshed from Google Patents.
US4985484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of coating compositions containing microcapsules
Assignee: WestRock MWV LLC
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Filing: 1989-02-27
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Granted: 1991-01-15
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Expires: 2009-02-27
Abstract
Abstract A process for the preparation of a coating composition containing microcapsules comprising the steps of: (a) preparing an aqueous dispersion of microcapsules, (b) adding a flow control agent to said aqueous dispersion microcapsules, (c) applying heat and vacuum to said aqueous dispersion of microcapsules containing said flow control agent to remove water from said dispersion of microcapsules and thereby concentrate said dispersion of microcapsules and (d) adding said concentrated dispersion of microcapsules to a printing ink vehicle to form a coating composition.
Inventors
- 👤 Noble H. Yoshida
- 👤 John Brabender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:57
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B41M5/1246; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A process for the preparation of a coating composition containing microcapsules comprising the steps of: (a) preparing an aqueous dispersion of microcapsules, (b) adding a flow control agent to said aqueous dispersion microcapsules, said flow control agent being selected from the group consisting of propylene glycol, ethylene glycol, glycerol, butanediol, and pentane diol, (c) applying heat and vacuum to said aqueous dispersion of microcapsules containing said flow control agent while continuously metering said dispersion of microcapsules to a wiped film evaporator and continuously forming a thin film of said dispersion of microcapsules on the walls of said evaporator to remove water from said dispersion of microcapsules and thereby concentrate said dispersion of microcapsules, and (d) adding said concentrated dispersion of microcapsules to a printing ink vehicle to form a coating composition.
Claim 2
Dependent Claim
131 words
A process for the preparation of a coating composition containing microcapsules comprising the steps of: (a) preparing an aqueous dispersion of microcapsules, (b) adding a flow control agent to said aqueous dispersion microcapsules, said flow control agent being selected from the group consisting of propylene glycol, ethylene glycol, glycerol, butanediol, and pentane diol, (c) applying heat and vacuum to said aqueous dispersion of microcapsules containing said flow control agent while continuously metering said dispersion of microcapsules to a wiped film evaporator and continuously forming a thin film of said dispersion of microcapsules on the walls of said evaporator to remove water from said dispersion of microcapsules and thereby concentrate said dispersion of microcapsules, and (d) adding said concentrated dispersion of microcapsules to a printing ink vehicle to form a coating composition.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said printing ink vehicle is a latex.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said latex is a polyvinyl alcohol latex.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein said glycol is propylene glycol.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein said dispersion of microcapsules contains about 20 to 50 % solids.
Claim 7
Dependent Claim
18 words
The process of claim 5 wherein said dispersion of microcapsules is concentrated to about 60 to 80% solids.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein said flow control agent is added to said dispersion in an amount of about 5 to 20%.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said coating composition contains about 60-70% solids.
Claim 10
Dependent Claim
23 words
The process of claim 8 wherein said coating composition contains about 3 to 10% latex (solids) and about 45 to 65% microcapsules (solids).
Claim 11
Dependent Claim
11 words
The process of claim 1 wherein said microcapsules are polyurea microcapsules.
Claim 12
Dependent Claim
20 words
The process of claim 10 wherein said polyurea microcapsules are prepared by interfacial polymerization of a polyisocyanate and a polyamine.
Claim 13
Dependent Claim
25 words
The process of claim 11 wherein said microcapsules are prepared by dispersing an oily phase containing said polyisocyanate in an aqueous phase containing said polyamine.
References Cited (Backward Citations)
US4171981A
Cited
US4847152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |