DK0444559T3 - Process for making microcapsules - Google Patents
Process for making microcapsulesInfo
- Publication number
- DK0444559T3 DK0444559T3 DK91102709.2T DK91102709T DK0444559T3 DK 0444559 T3 DK0444559 T3 DK 0444559T3 DK 91102709 T DK91102709 T DK 91102709T DK 0444559 T3 DK0444559 T3 DK 0444559T3
- Authority
- DK
- Denmark
- Prior art keywords
- acid
- dispersion
- compound
- water
- precondensate
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 5
- 239000003094 microcapsule Substances 0.000 title abstract 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 6
- 239000006185 dispersion Substances 0.000 abstract 6
- 150000001875 compounds Chemical class 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- 239000002253 acid Substances 0.000 abstract 3
- 230000002378 acidificating effect Effects 0.000 abstract 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 abstract 3
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract 2
- -1 alkali metal sulphamate Chemical class 0.000 abstract 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 2
- 239000002775 capsule Substances 0.000 abstract 2
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical class O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 abstract 2
- 230000002209 hydrophobic effect Effects 0.000 abstract 2
- 239000003921 oil Substances 0.000 abstract 2
- 238000006068 polycondensation reaction Methods 0.000 abstract 2
- 229920005989 resin Polymers 0.000 abstract 2
- 239000011347 resin Substances 0.000 abstract 2
- 230000003019 stabilising effect Effects 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 2
- 229920000877 Melamine resin Polymers 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 229920003180 amino resin Polymers 0.000 abstract 1
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 239000012736 aqueous medium Substances 0.000 abstract 1
- 150000007514 bases Chemical class 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000002609 medium Substances 0.000 abstract 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract 1
- 239000000376 reactant Substances 0.000 abstract 1
- 238000009877 rendering Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000004094 surface-active agent Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/18—In situ polymerisation with all reactants being present in the same phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
- B41M5/165—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components characterised by the use of microcapsules; Special solvents for incorporating the ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Color Printing (AREA)
- Cosmetics (AREA)
- Medicinal Preparation (AREA)
Abstract
The process for producing microcapsules by microencapsulation of hydrophobic oils with substances dissolved or dispersed therein, in particular colour reactants of colour reaction systems, is described, wherein a hydrophobic oil containing the substance in solution or dispersion is mixed under vigorous stirring with an aqueous medium, aminoplast capsules are formed under acidic conditions in the resulting oil-in-water dispersion and these capsules are then isolated if desired, the acidic oil-in-water dispersion containing at least one dispersion-stabilising compound which is not a reactive surfactant. The process is characterised in that the acidic oil-in-water dispersion A) contains a water-soluble anionic, sulphonated melamine/formaldehyde precondensate and/or B) a water-soluble anionically modified melamine/formaldehyde precondensate of a type which has been obtained by a) reacting, in a first stage, melamine and formaldehyde at elevated temperature in an alkaline medium and in the presence of water with at least one compound (I) in the form of an alkali metal sulphite, alkaline earth metal sulphite, an alkali metal sulphamate, an alkaline earth metal sulphamate, an aminosulphonic acid, aminocarboxylic acid and an aminodicarboxylic acid to give a precondensate, b) subsequently, in a second stage, subjecting this precondensate at a pH of about 5.5 to 7.0 to a polycondensation by acidifying with at least one acidic compound (II) in the form of sulphamic acid, an aminocarboxylic acid, an aminodicarboxylic acid, an hydroxycarboxylic acid, a polyhydroxycarboxylic acid and an aminosulphonic acid, c) after completion of the polycondensation, rendering the resulting resin solution alkaline, if necessary by addition of at least one basic compound (III), and d) including this resin solution, which may be alkaline, in the process for stabilising the dispersion. This process has the advantage that it requires only a single compound for stabilising the dispersion and does not have to rely on a further compound which loads the system with formaldehyde.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4006570A DE4006570C1 (en) | 1990-03-02 | 1990-03-02 | |
| SG157694A SG157694G (en) | 1990-03-02 | 1994-10-27 | Process for producing microcapsules |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK0444559T3 true DK0444559T3 (en) | 1994-09-05 |
Family
ID=25890713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK91102709.2T DK0444559T3 (en) | 1990-03-02 | 1991-02-25 | Process for making microcapsules |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0444559B1 (en) |
| AT (1) | ATE105207T1 (en) |
| DE (2) | DE4006570C1 (en) |
| DK (1) | DK0444559T3 (en) |
| ES (1) | ES2052293T3 (en) |
| HK (1) | HK27495A (en) |
| SG (1) | SG157694G (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2723032B1 (en) | 1994-07-26 | 1996-11-22 | Copigraph Sa | NOVEL ORGANIC SOLVENT FOR MICROCAPSULES USEFUL IN PARTICULAR FOR PRODUCING PRESSURE SENSITIVE SELF-COPYING PAPER AND LAPRESSION SENSITIVE PAPER COATED WITH SUCH MICROCAPSULES |
| FR2727633A1 (en) | 1994-12-02 | 1996-06-07 | Copigraph | MICROCAPSULES CONTAINING AS A SOLVENT A TERPENIC DERIVATIVE OR ABIETIC ACID AND PRESSURE-SENSITIVE PAPERS COATED WITH SUCH MICROCAPSULES |
| DE19814880C2 (en) * | 1998-04-02 | 2002-03-21 | Fraunhofer Ges Forschung | Modified amino resin precondensates, their preparation and their use |
| DE102008051799A1 (en) * | 2008-10-17 | 2010-04-22 | Henkel Ag & Co. Kgaa | Stabilization of microcapsule slurries |
| DE102020114289A1 (en) | 2020-05-28 | 2021-12-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Functionalized particles containing amino resins |
| CN113600239B (en) * | 2021-08-09 | 2023-04-11 | 华侨大学 | Triptycene modified graphite-phase carbon nitride and preparation method and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH540715A (en) * | 1970-05-26 | 1973-10-15 | Ciba Geigy Ag | Process for the encapsulation of a substance finely divided in a liquid |
| JPS6023859B2 (en) * | 1978-11-14 | 1985-06-10 | 神崎製紙株式会社 | Method for manufacturing microcapsules |
| JPS5592135A (en) * | 1978-12-29 | 1980-07-12 | Kanzaki Paper Mfg Co Ltd | Production of microcapsule |
| ATE56632T1 (en) * | 1987-12-21 | 1990-10-15 | Koehler August Papierfab | PROCESS FOR THE MANUFACTURE OF MICROCAPSULES, THE MICROCAPSULES AVAILABLE THEREFORE AND THEIR USE. |
| DE3818712A1 (en) * | 1988-06-01 | 1989-12-14 | Koehler August Papierfab | Process for the production of microcapsules, the microcapsules obtainable thereby and use thereof |
| DE3942155C1 (en) * | 1989-12-20 | 1991-03-21 | Papierfabrik August Koehler Ag, 7602 Oberkirch, De |
-
1990
- 1990-03-02 DE DE4006570A patent/DE4006570C1/de not_active Expired - Lifetime
-
1991
- 1991-02-25 ES ES91102709T patent/ES2052293T3/en not_active Expired - Lifetime
- 1991-02-25 EP EP91102709A patent/EP0444559B1/en not_active Expired - Lifetime
- 1991-02-25 DK DK91102709.2T patent/DK0444559T3/en active
- 1991-02-25 AT AT9191102709T patent/ATE105207T1/en not_active IP Right Cessation
- 1991-02-25 DE DE59101526T patent/DE59101526D1/en not_active Expired - Fee Related
-
1994
- 1994-10-27 SG SG157694A patent/SG157694G/en unknown
-
1995
- 1995-03-02 HK HK27495A patent/HK27495A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ES2052293T3 (en) | 1994-07-01 |
| EP0444559A1 (en) | 1991-09-04 |
| ATE105207T1 (en) | 1994-05-15 |
| HK27495A (en) | 1995-03-10 |
| SG157694G (en) | 1995-04-28 |
| DE59101526D1 (en) | 1994-06-09 |
| DE4006570C1 (en) | 1991-05-23 |
| EP0444559B1 (en) | 1994-05-04 |
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