Blends of encapsulated biocides
First Claim
Patent Images
1. 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.
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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.
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Citations
10 Claims
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1. A coating composition comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A coating composition comprising:
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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. - View Dependent Claims (7, 8, 9, 10)
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Specification