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US4931362A
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Microcapsule and micromatrix bodies and method for their formation
Assignee: FJOH KWIZDA DR KARL GmbH
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Filing: 1988-08-18
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Granted: 1990-06-05
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Expires: 2008-08-18
Abstract
Abstract An organic phase which comprises a water-insoluble material to be encapsulated, a capsule-forming or matrix-forming monomer or prepolymer and, should this be desirable, a solvent, is dispersed in droplet form in an aqueous phase. The capsule-forming or matrix-forming monomer or prepolymer forms a sheath around the material to be encapsulated. As a capsule-forming or matrix-forming monomer, an organosilicon compound of the general formula ##STR1## is used, wherein R 1 is a linear or branched, saturated or unsaturated, n-functional hydrocarbon moiety, which may be interrupted by groups containing oxygen, nitrogen or sulfur; R 2 and R 3 are the same or different and represent a hydrocarbon moiety with 1 to 6 carbon atoms or X; X is a hydroxyl group or a hydrolyzable group and n is a whole number greater than or equal to 1, with the proviso that, when n=1, R 1 has at least 12 carbon atoms and R 2 and R 3 represent X or a prepolymer hereof. The method can be carried out easily and requires only one compound to form the capsules or micromatrix bodies. In the implementation of the method, no foam occurs and the method results in end products with an acceptable shelf life.
Inventors
- 👤 Wilhelm Zsifkovits
- 👤 Burghard Gruning
- 👤 Hans-Joachim Kollmeier
- 👤 Dietmar Schaefer
- 👤 Christian Weitemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:49
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/14; B01J13/18; B01J13/185; B41; B41M; B41M5/00; B41M5/124; B41M5/165; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
146 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a component capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being an organosilicon compound of the general formula ##STR4## wherein R 2 is selected from the group consisting of linear, branched, saturated and unsaturated, n-functional hydrocarbon groups having 2 to 14,000 carbon atoms and such groups interrupted by groups containing oxygen, nitrogen or sulfur; R 2 , R 3 are the same or different and represent a hydrocarbon group with 1 to 6 carbon atoms or the X groups; X is hydroxyl or a hydrolyzable group, and n≧2, and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 2
Independent Claim
146 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a component capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being an organosilicon compound of the general formula ##STR4## wherein R 2 is selected from the group consisting of linear, branched, saturated and unsaturated, n-functional hydrocarbon groups having 2 to 14,000 carbon atoms and such groups interrupted by groups containing oxygen, nitrogen or sulfur; R 2 , R 3 are the same or different and represent a hydrocarbon group with 1 to 6 carbon atoms or the X groups; X is hydroxyl or a hydrolyzable group, and n≧2, and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said organic phase contains a solvent.
Claim 4
Independent Claim
19 words
The method of claims 1 or 2, wherein the condensation is carried out in the presence of a catalyst.
Claim 5
Dependent Claim
22 words
The method of claim 3, wherein surface active organic acids or organic compounds of tin and titanium are used as condensation catalysts.
Claim 6
Independent Claim
18 words
The method of claims 1 or 2, wherein said organosilicon compound is employed in monomeric or prepolymeric form.
Claim 7
Dependent Claim
43 words
The method of claim 4, wherein the monomer or prepolymer is contained in the hydrophobic phase in an amount of 5 to 95% by weight, based on the hydrophobic phase, the hydrophobic phase constituting 1 to 60% by volume of the total dispersion.
Claim 8
Independent Claim
16 words
The method of claims 1 or 2, wherein R 1 has 2 to 1,000 carbon atoms.
Claim 9
Independent Claim
16 words
The method of claims 1 or 2, wherein R 1 has 2 to 250 carbon atoms.
Claim 10
Independent Claim
41 words
The method of claims 1 or 2, wherein R 1 is an aliphatic hydrocarbon group with 8 or 10 carbon atoms, R 2 is methyl, methoxy or ethoxy, R 3 is methoxy or ethoxy, X is methoxy or ethoxy and n=2.
Claim 11
Independent Claim
16 words
The method of claims 1 or 2, wherein said hydrolyzable group is alkoxy, acyloxy or halogen.
Claim 12
Independent Claim
21 words
The method of claims 1 or 2, wherein the Si-content of said compound is between about 0.1 to 27% by weight.
Claim 13
Independent Claim
24 words
The method of claims 1 or 2, wherein the weight ratio of said active ingredient to the compound is between about 98:2 to 1:99.
Claim 14
Independent Claim
24 words
The method of claims 1 or 2, wherein the weight ratio of said active ingredient to said compound is between about 95:5 to 50:50.
Claim 15
Independent Claim
23 words
The method of claims 1 or 2, wherein step (a) is carried out with the aid of a dispersing device generating shear forces.
Claim 16
Independent Claim
111 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a component capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being a modified polybutadiene of average molecular weight 3,000, in which 6 to 14% of the butadiene units carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 ) (OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups; and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 17
Independent Claim
111 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a component capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being a modified polybutadiene of average molecular weight 3,000, in which 6 to 14% of the butadiene units carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 ) (OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups; and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 18
Independent Claim
110 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a compound capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being a modified butadiene of average molecular weight 1,000, in which 6 to 16% of the butadiene groups carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 )(OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups; and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 19
Independent Claim
110 words
A method of forming microcapsules or micromatrix bodies having an interior water-immiscible liquid phase containing an active, water-immiscible ingredient, said method comprising: (a) dispersing in droplet form an organic phase containing said active ingredient and a compound capable of forming a capsule or matrix sheath in an aqueous phase; (b) said component being a modified butadiene of average molecular weight 1,000, in which 6 to 16% of the butadiene groups carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 )(OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups; and (c) condensing said component to form a cross-linked polymer constituting said capsule or matrix sheath.
Claim 20
Dependent Claim
114 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of an organosilicon compound of the general formula ##STR5## wherein R 1 is selected from the group consisting of linear, branched, saturated and unsaturated, n-functional hydrocarbon groups having 2 to 14,000 carbon atoms and such groups interrupted by groups containing oxygen, nitrogen or sulfur; R 2 , R 3 are the same or different and represent a hydrocarbon group with 1 to 6 carbon atoms or the X groups; X is hydroxyl or a hydrolyzable group, and n≧2.
Claim 21
Dependent Claim
114 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of an organosilicon compound of the general formula ##STR5## wherein R 1 is selected from the group consisting of linear, branched, saturated and unsaturated, n-functional hydrocarbon groups having 2 to 14,000 carbon atoms and such groups interrupted by groups containing oxygen, nitrogen or sulfur; R 2 , R 3 are the same or different and represent a hydrocarbon group with 1 to 6 carbon atoms or the X groups; X is hydroxyl or a hydrolyzable group, and n≧2.
Claim 22
Dependent Claim
17 words
The microcapsule or micromatrix body of claim 17, wherein R 1 has 2 to 1,000 carbon atoms.
Claim 23
Dependent Claim
17 words
The microcapsule or micromatrix body of claim 17, wherein R 1 has 2 to 250 carbon atoms.
Claim 24
Dependent Claim
42 words
The microcapsule or micromatrix body of claim 17, wherein R 1 is an aliphatic hydrocarbon group with 8 or 10 carbon atoms, R 2 is methyl, methoxy or ethoxy, R 3 is methoxy or ethoxy, X is methoxy or ethoxy and n=2.
Claim 25
Dependent Claim
17 words
The microcapsule or micromatrix body of claim 20, wherein said hydrolyzable group is alkoxy, acyloxy or halogen.
Claim 26
Dependent Claim
22 words
The microcapsule or micromatrix body of claim 17, wherein the Si-content of said compound is between about 0.1 to 27% by weight.
Claim 27
Dependent Claim
25 words
The microcapsule or micromatrix body of claim 17, wherein the weight ratio of said active ingredient to the compound is between about 98:2 to 1:99.
Claim 28
Dependent Claim
25 words
The microcapsule or micromatrix body of claim 17, wherein the weight ratio of said active ingredient to said compound is between about 95:5 to 50:50.
Claim 29
Dependent Claim
78 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of a modified polybutadiene of average molecular weight 3,000, in which 6 to 14% of the butadiene units carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 )(OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups.
Claim 30
Dependent Claim
78 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of a modified polybutadiene of average molecular weight 3,000, in which 6 to 14% of the butadiene units carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 )(OC 2 H 5 ) 2 or --Si(OC 2 H 5 ) 3 groups.
Claim 31
Dependent Claim
78 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of a modified butadiene of average molecular weight 1,000, in which 6 to 16% of the butadiene groups carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 ) (OC 2 H 5 ) 2 or --Si(OC 2 H 5 )3 groups.
Claim 32
Dependent Claim
78 words
In a microcapsule or micromatrix body wherein a water-immiscible active ingredient is encapsulated or sheathed by a membrane wall, the improvement which comprises that the membrane wall is a polymer formed by the condensation and cross-linking of a modified butadiene of average molecular weight 1,000, in which 6 to 16% of the butadiene groups carry --Si(CH 3 )(OCH 3 ) 2 , --Si(CH 3 ) (OC 2 H 5 ) 2 or --Si(OC 2 H 5 )3 groups.
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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |