US7377968B2
Active / In Force
US
⏱️ 0.4 years remaining
Blends of encapsulated biocides
Assignee: Microtek Laboratories Inc
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Filing: 2007-03-08
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Granted: 2008-05-27
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Expires: 2027-03-08
Abstract
Abstract The present invention relates to blends of encapsulated biocides with free biocides. In particular, the present invention relates to blends of encapsulated 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone (“DCOIT”) with free biocides. The invention also relates to marine antifouling coatings and paints incorporating free biocides and encapsulated DCOIT, and using the free biocides and encapsulated DCOIT in marine antifouling coatings and paints.
Inventors
- 👤 Sarah E. Reybuck
- 👤 Curtis Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:44
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/14; C09D5/16; C09D5/1606; A; A01; A01N; A01N43/00; A01N43/72; A01N43/80; C09D5/1612; C09D5/1625; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2989
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A coating composition comprising: a. a microencapsulated biocide comprising an isothiazolone biocide or antifouling agent as a core material encapsulated in a wall material that is essentially impermeable to xylene and from which water can leach the biocide from the wall material; b. free isothiazolone biocide or antifouling agent; c. a film forming polymer or binder; and d. one or more solvents; wherein the concentration of free isothiazolone biocide or antifouling agent is from 0.25 percent, by weight of the composition, up to a concentration that does not reduce the glass transition temperature of the film forming polymer by more than 20° C.
Claim 2
Dependent Claim
103 words
A coating composition comprising: a. a microencapsulated biocide comprising an isothiazolone biocide or antifouling agent as a core material encapsulated in a wall material that is essentially impermeable to xylene and from which water can leach the biocide from the wall material; b. free isothiazolone biocide or antifouling agent; c. a film forming polymer or binder; and d. one or more solvents; wherein the concentration of free isothiazolone biocide or antifouling agent is from 0.25 percent, by weight of the composition, up to a concentration that does not reduce the glass transition temperature of the film forming polymer by more than 20° C.
Claim 3
Dependent Claim
12 words
The coating composition of claim 1 wherein the microencapsulated biocide comprises 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone.
Claim 4
Dependent Claim
13 words
The coating composition of claim 1 wherein the free isothiazolone biocide comprises 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone.
Claim 5
Dependent Claim
18 words
The coating composition of claim 1 wherein the composition comprises two or more microencapsulated biocides or antifouling agents.
Claim 6
Dependent Claim
19 words
The coating composition of claim 1 wherein the composition comprises two or more free isothiazolones biocides or antifouling agents.
Claim 7
Dependent Claim
98 words
A coating composition comprising: a. a microencapsulated biocide comprising an isothiazolone biocide or antifouling agent as a core material encapsulated in a wall material that is essentially impermeable to xylene and from which water can leach the biocide from the wall material; b. free isothiazolone biocide or antifouling agent; c. a film forming polymer or binder; and d one or more solvents; wherein the concentration of free isothiazolone biocide or antifouling agent is from 0.25 percent, by weight of the composition, up to a concentration that does not result in an increase in drying time of the composition.
Claim 8
Dependent Claim
98 words
A coating composition comprising: a. a microencapsulated biocide comprising an isothiazolone biocide or antifouling agent as a core material encapsulated in a wall material that is essentially impermeable to xylene and from which water can leach the biocide from the wall material; b. free isothiazolone biocide or antifouling agent; c. a film forming polymer or binder; and d one or more solvents; wherein the concentration of free isothiazolone biocide or antifouling agent is from 0.25 percent, by weight of the composition, up to a concentration that does not result in an increase in drying time of the composition.
Claim 9
Dependent Claim
12 words
The coating composition of claim 6 wherein the microencapsulated biocide comprises 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone.
Claim 10
Dependent Claim
13 words
The coating composition of claim 6 wherein the free isothiazolone biocide comprises 4,5-dichloro-2-n-octyl-3(2H)-isothiazolone.
Claim 11
Dependent Claim
18 words
The coating composition of claim 6 wherein the composition comprises two or more microencapsulated biocides or antifouling agents.
Claim 12
Dependent Claim
19 words
The coating composition of claim 6 wherein the composition comprises two or more free isothiazolones biocides or antifouling agents.
References Cited (Backward Citations)
US4253877A
Cited
US5127934A
Cited
JPH05320002A
Cited
US5378413A
Cited
EP0679333A2
Cited
US6365066B1
Cited
US6291549B1
Cited
US6221374B1
Cited
US6149927A
Cited
US6090399A
Cited
US6610282B1
Cited
US6905698B1
Cited
US6096225A
Cited
US20020001618A1
Cited
US6676954B2
Cited
JP2002053412A
Cited
US20030194491A1
Cited
US20040234603A1
Cited
US20060063001A1
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 7.5 Years (Year 8) | 2015-05-27 | 2015-11-26 | 2016-05-27 | $3760.00 | Window Closed / Lapsed |
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