US4495509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microencapsulation by interchange of multiple emulsions
Assignee: Moore Business Forms Inc
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Filing: 1983-06-09
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Granted: 1985-01-22
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Expires: 2003-06-09
Abstract
Abstract A method of microencapsulation is disclosed whereby two or more organic-in-aqueous emulsions, each containing a reactive component in the organic phase, are mixed together causing the reactive components to react and form polymeric walls around the organic droplets. Either or both emulsions may contain one or more fill materials in their organic phases.
Inventors
- 👤 Hung-Ya Chao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:53
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/16; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
84 words
A method of making microcapsules having generally continuous polymeric walls comprising the following steps: (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution; (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution; and (d) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules.
Claim 2
Independent Claim
84 words
A method of making microcapsules having generally continuous polymeric walls comprising the following steps: (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution; (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution; and (d) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein said first organic solution additionally comprises a fill material such that at least a portion of said fill material is encapsulated within said microcapsules.
Claim 4
Dependent Claim
50 words
The method of claim 1 additionally comprising the following step: (c) preparing a third organic-in-aqueous emulsion comprising a third organic solution and a third aqueous emulsification solution, said third organic solution comprising a fill material; such that at least a portion of said fill material is encapsulated within said microcapsules.
Claim 5
Dependent Claim
45 words
The method of claim 1 wherein said first oil soluble reactive material is selected from the group consisting of acid chlorides, sulfonyl chlorides, isocyanates, bischloroformates, and epoxy resins, and said second oil soluble reactive material is selected from the group consisting of amines and bisphenols.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the microcapsules range in size from 1 to 20 microns.
Claim 7
Dependent Claim
14 words
The method of claim 2 wherein said fill material is a colorless dye precursor.
Claim 8
Dependent Claim
44 words
The method of claim 1 wherein said first organic solution additionally comprises a first fill material and said second organic solution additionally comprises a second fill material such that at least a portion of each of said fill materials is encapsulated within said microcapsules.
Claim 9
Dependent Claim
32 words
The method of claim 1 wherein each of said aqueous emulsification solutions comprises at least one emulsifier selected from the group consisting of polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, starch, carboxymethylcellulose, and hydroxyethylcellulose.
Claim 10
Dependent Claim
28 words
The method of claim 6 wherein said first organic solution includes an organic solvent selected from the group consisting of benzylbutylphthalate, dibutylphthalate, toluene, xylenes, alkylbenzenes, alkylnaphthalenes, and biphenyls.
Claim 11
Dependent Claim
25 words
The method of claim 1 wherein said organic-in-aqueous emulsions include a plurality of organic droplets having sizes in the range of 1 to 20 microns.
Claim 12
Dependent Claim
22 words
The method of claim 1 wherein said mixing of said organic-in-aqueous emulsions comprises stirring said emulsions for approximately 4 to 24 hours.
Claim 13
Dependent Claim
23 words
The method of claim 11 wherein said organic-in-aqueous emulsions are stirred at a temperature in the range of 20° C. to 80° C.
Claim 14
Dependent Claim
84 words
Microcapsules having generally continuous polymeric walls prepared by a method comprising the following steps: (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution; (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution; and (d) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules.
Claim 15
Dependent Claim
84 words
Microcapsules having generally continuous polymeric walls prepared by a method comprising the following steps: (a) preparing a first organic-in-aqueous emulsion comprising a first organic solution having a first oil soluble reactive material dissolved therein and a first aqueous emulsification solution; (b) preparing a second organic-in-aqueous emulsion comprising a second organic solution having a second oil soluble reactive material dissolved therein and a second aqueous emulsification solution; and (d) mixing said organic-in-aqueous emulsions such that said oil soluble reactive materials react to form said microcapsules.
Claim 16
Dependent Claim
30 words
The microcapsules of claim 13 wherein said first organic solution additionally comprises a fill material such that at least a portion of said fill material is encapsulated within said microcapsules.
Claim 17
Dependent Claim
53 words
The microcapsules of claim 13 wherein said method additionally comprising the following step: (c) preparing a third organic-in-aqueous emulsion comprising a third organic solution and a third aqueous emulsification solution, said third organic solution comprising a fill material; such that at least a portion of said fill material is encapsulated within said microcapsules.
Claim 18
Dependent Claim
46 words
The microcapsules of claim 13 wherein said first oil soluble reactive material is selected from the group consisting of a acid chlorides, sulfonyl chlorides, isocyanates, bischloroformates, and epoxy resins, and said second oil soluble reactive material is selected from the group consisting of amines and bisphenols.
Claim 19
Dependent Claim
16 words
The microcapsules of claim 13 wherein said microcapsules range in size from 1 to 20 microns.
Claim 20
Dependent Claim
14 words
The microcapsules of claim 14 wherein said fill material is a colorless dye precursor.
Claim 21
Dependent Claim
44 words
The microcapsules of claim 13 wherein said first organic solution additionally comprises a first fill material and said second organic solution additionally comprises a second fill material such that at least a portion of each of said fill materials is encapsulated within said microcapsules.
Claim 22
Dependent Claim
32 words
The microcapsules of claim 13 wherein each of said aqueous emulsification solutions comprises at least one emulsifier selected from the group consisting of polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, starch, carboxymethylcellulose, and hydroxyethylcellulose.
Claim 23
Dependent Claim
28 words
The microcapsules of claim 18 wherein said first organic solution includes an organic solvent selected from the group consisting of benzylbutylphthalate, dibutylphthalate, toluene, xylenes, alkylbenzenes, alkylnaphthalenes, and biphenyls.
Claim 24
Dependent Claim
25 words
The microcapsules of claim 13 wherein said organic-in-aqueous emulsions include a plurality of organic droplets having sizes in the range of 1 to 20 microns.
Claim 25
Dependent Claim
22 words
The microcapsules of claim 13 wherein said mixing of said organic-in-aqueous emulsions comprises stirring said emulsions for approximately 4 to 24 hours.
Claim 26
Dependent Claim
23 words
The microcapsules of claim 23 wherein said organic-in-aqueous emulsions are stirred at a temperature in the range of 20° C. to 80° C.
Claim 27
Dependent Claim
52 words
A carbonless copying system comprising a substrate, a coating containing a plurality of microcapsules according to claim 18 over at least a portion of said substrate, and a substance capable of reacting with said colorless dye precursor to produce a colored reaction product, said substance being in reactive contact with said microcapsules.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
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