Novel polysiloxane-based fouling control coating systems

Abstract

The present application discloses novel multilayer polysiloxane-based fouling control coating systems having included therein active constituents like biocides and/or enzymes. Further, the polysiloxane-based layers may individually have included as a part thereof hydrophilic oligomer/polymer moieties, and/or said may further comprising one or more hydrophilic-modified polysiloxane oils.

1 . A fouling control coating system comprising at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more active ingredients selected from biocides and enzymes; and   b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts,   
       wherein, when said one or more active ingredient includes biocide(s),
 c) said binder matrix of said first coat having included as a part thereof hydrophilic oligomer/polymer moieties, and/or said first coat further comprising one or more hydrophilic-modified polysiloxane oils, or 
 d) said binder matrix of said second coat having included as a part thereof hydrophilic oligomer/polymer moieties, and/or said second coat further comprising one or more hydrophilic-modified polysiloxane oils. 
 
     
     
         2 . A fouling control coating system according to  claim 1 , said system comprising at least a cured first coat and a cured second coat,
 a. said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more active ingredients selected from biocides and enzymes; and   b. said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts,   c. said binder matrix of said first coat and/or of said second coat having included as a part thereof:
 i. hydrophilic oligomer/polymer moieties, and/or 
 ii. one or more hydrophilic-modified polysiloxane oils. 
   
     
     
         3 . A fouling control coating system according to  claim 1 , wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 30°. 
     
     
         4 . A fouling control coating system according to  claim 1  which comprises at least a cured first coat and a cured second coat,
 a. said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more active ingredients selected from biocides and enzymes; and 
 b. said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, 
 c. said binder matrix of said second coat having included as a part thereof hydrophilic oligomer/polymer moieties, and/or said second coat further comprising one or more hydrophilic-modified polysiloxane oils. 
 
     
     
         5 . The fouling control coating system according to  claim 1 , wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 27°. 
     
     
         6 . The fouling control coating system according to  claim 1 , wherein said binder matrix of said second coat has included as a part thereof hydrophilic oligomer/polymer moieties. 
     
     
         7 . The fouling control coating system according to  claim 1 , wherein said second coat further comprises one or more hydrophilic-modified polysiloxane oils. 
     
     
         8 . The fouling control coating system according to  claim 4 , comprising at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more biocides; and   b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said second coat further comprising one or more hydrophilic-modified polysiloxane oils; wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 27°.   
     
     
         9 . The fouling control coating system according to  claim 4 , comprising at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more biocides; and   b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said binder matrix of said second coat having included as a part thereof hydrophilic oligomer/polymer moieties; wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 27°.   
     
     
         10 . The fouling control coating system according to  claim 4 , comprising at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more enzymes; and   b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said second coat further comprising one or more hydrophilic-modified polysiloxane oils; wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 27°.   
     
     
         11 . The fouling control coating system according to  claim 4 , comprising at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more enzymes; and   b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said binder matrix of said second coat having included as a part thereof hydrophilic oligomer/polymer moieties; wherein the equilibrium water contact angle of the cured second coat is in the range of 0° to 27°.   
     
     
         12 . A fouling control coating system according to  claim 1  which comprises at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more active ingredients selected from biocides and enzymes; 
 b) said binder matrix of said first coat having included as a part thereof hydrophilic oligomer/polymer moieties, and/or said first coat further comprising one or more hydrophilic-modified polysiloxane oils; and 
 c) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts. 
 
     
     
         13 . The fouling control coating system according to  claim 12 , wherein the one or more active ingredients include one or more biocides. 
     
     
         14 . The fouling control coating system according to  claim 12 , wherein the one or more active ingredients include one or more enzymes. 
     
     
         15 . A fouling control coating system according to  claim 1  which comprises at least a cured first coat and a cured second coat,
 a) said first coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said first coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts, said first coat further comprising one or more enzymes; and 
 b) said second coat comprising a polysiloxane-based binder matrix constituting at least 40% by dry weight of said second coat, and more than 50% by weight of the binder matrix being represented by polysiloxane parts. 
 
     
     
         16 . The fouling control coating system according to  claim 15 , wherein the first coat further comprising one or more hydrophilic-modified polysiloxane oils; and or wherein the binder matrix of said first coat having included as a part thereof hydrophilic oligomer/polymer moieties. 
     
     
         17 . (canceled) 
     
     
         18 . A method of establishing a fouling control coating system on a surface of a substrate, comprising the sequential steps of:
 a) applying one or more layers of a polysiloxane-based coating composition onto the surface of said substrate, e.g. either a native substrate or a substrate already carrying one or more coatings, as the case may be, and allowing said layer(s) to cure, thereby forming a cured first coat as defined in  claim 1 , and   b) applying one or more layers of a polysiloxane-based coating composition onto the surface of said cured first coat, and allowing said layer(s) to cure, thereby foaming a cured second coat as defined in  claim 1 .   
     
     
         19 . A method of establishing a fouling control coating system on a surface of a substrate, comprising the sequential steps of:
 a) applying one or more layers of a polysiloxane-based coating composition onto the surface of said substrate, e.g. either a native substrate or a substrate already carrying one or more coatings, as the case may be, and allowing said layer(s) to cure, thereby forming a cured first coat as defined in  claim 4 , and   b) applying one or more layers of a polysiloxane-based coating composition onto the surface of said cured first coat, and allowing said layer(s) to cure, thereby forming a cured second coat as defined in  claim 4 .   
     
     
         20 . A method of establishing a fouling control coating system on a surface of a substrate, comprising the sequential steps of:
 a) applying one or more layers of a polysiloxane-based coating composition onto the surface of said substrate, e.g. either a native substrate or a substrate already carrying one or more coatings, as the case may be, and allowing said layer(s) to cure, thereby forming a cured first coat as defined in  claim 12 , and   b) applying one or more layers of a polysiloxane-based coating composition onto the surface of said cured first coat, and allowing said layer(s) to cure, thereby forming a cured second coat as defined in  claim 12 .   
     
     
         21 . A method of establishing a fouling control coating system on a surface of a substrate, comprising the sequential steps of:
 a) applying one or more layers of a polysiloxane-based coating composition onto the surface of said substrate, e.g. either a native substrate or a substrate already carrying one or more coatings, as the case may be, and allowing said layer(s) to cure, thereby forming a cured first coat as defined in  claim 15 , and   b) applying one or more layers of a polysiloxane-based coating composition onto the surface of said cured first coat, and allowing said layer(s) to cure, thereby forming a cured second coat as defined in  claim 15 .