US4003846A
Expired / Lapsed
US
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Process for the encapsulating of substances immiscible with water
Assignee: Novartis Corp
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Filing: 1974-11-13
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Granted: 1977-01-18
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Expires: 1994-11-13
Abstract
Abstract A process for the encapsulating of substances immiscible with water by dispersing the substance to be encapsulated in a distribution medium in the presence of a hydrate or bisulphite adduct of a polyacrolein or acrolein copolymer and reacting said hydrate or bisulphite adduct with a water-soluble, polyfunctional, monomeric or polymeric hydrophilic compound and, optionally, additionally with a curing agent or an aminoplast precondensate to form an insoluble capsule.
Inventors
- 👤 Martin Kuhn
- 👤 Melvin Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/18; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987; Y10T428/2989
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with an alkyleneamine having 2 to 5 amino groups, which are separated by straight-chain or branched-chain alkylene groups having 2 to 6 carbon atoms to form an insoluble capsule material.
Claim 2
Dependent Claim
98 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with an alkyleneamine having 2 to 5 amino groups, which are separated by straight-chain or branched-chain alkylene groups having 2 to 6 carbon atoms to form an insoluble capsule material.
Claim 3
Dependent Claim
87 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate of bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a polyalkyleneimine having a mean molecular weight of between 500 and 80000 to form an insoluble capsule material.
Claim 4
Dependent Claim
87 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate of bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a polyalkyleneimine having a mean molecular weight of between 500 and 80000 to form an insoluble capsule material.
Claim 5
Dependent Claim
79 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a water-soluble basic aminoplast to form an insoluble capsule material.
Claim 6
Dependent Claim
79 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a water-soluble basic aminoplast to form an insoluble capsule material.
Claim 7
Dependent Claim
86 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a polyamideamine obtained by polycondensation of polymeric carboxylic acid with polyamines to form an insoluble capsule material.
Claim 8
Dependent Claim
86 words
A process for the encapsulating of substances immiscible with water, wherein the substance to be encapsulated is dispersed in a distribution medium in the presence of an aqueous solution of a polyacrolein or acrolein copolymer present as hydrate or bisulphite adduct, which aqueous solution is capable of forming a compound insoluble in the distribution medium; and the hydrate or the bisulphite adduct is reacted in the resulting dispersion with a polyamideamine obtained by polycondensation of polymeric carboxylic acid with polyamines to form an insoluble capsule material.
Claim 9
Dependent Claim
26 words
A process according to claim 4, wherein the polyamideamine has an amine value in the range of 200-650 mg. of potassium hydroxide per gram of polyamideamine.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |