Protective coat-forming coating composition, coated article, and multilayer laminate

Abstract

A coating composition primarily comprising a disilane compound of the formula (A): X m R 1 3-m Si—Y—SiR 1 3-m X m   (A) wherein R 1 is a monovalent hydrocarbon group, Y is a divalent fluorinated organo group, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof is applied and cured to form a protective coat having excellent chemical resistance and antireflection.

1 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition, serving as a chemical resistant film, said coating composition primarily comprising a disilane compound having the formula (A):  
       X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)  
     wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof.  
   
   
       2 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition, serving as an antireflection film, said coating composition primarily comprising a disilane compound having the formula (A):  
       X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)  
     wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof.  
   
   
       3 . A coated article comprising 
 a transparent substrate,    a layer formed thereon having a higher refractive index than the substrate, and    a cured coat formed on a high refractive index layer from a protective coat-forming coating composition, serving as an antireflection film, said coating composition primarily comprising a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof.    
   
   
       4 . The coated article of  claim 3 , further comprising a mar resistant protective layer between the substrate and the high refractive index layer.  
   
   
       5 . The coated article of  claim 3 , wherein the high refractive index layer comprises a metal oxide sol.  
   
   
       6 . The coated article of  claim 5 , wherein the metal oxide sol contains at least one element selected from among Ti, Sn, Ce, Al, Zr and In.  
   
   
       7 . The coated article of  claim 3 , wherein a coating composition from which the high refractive index layer is formed is thermosetting or photo-curing.  
   
   
       8 . The coated article of  claim 4 , wherein a coating composition from which the protective layer is formed is thermosetting or photo-curing.  
   
   
       9 . The coated article of  claim 1 , wherein said transparent substrate comprises an organic resin and/or an inorganic material such as glass or ceramics.  
   
   
       10 . The coated article of  claim 1 , wherein said transparent substrate comprises a polycarbonate resin, polyalkylene terephthalate resin, cellulose triacetate resin, polystyrene resin or polyolefin resin.  
   
   
       11 . A multilayer laminate comprising the coated article of  claim 1 , a tackifier or adhesive layer lying on the transparent substrate side of the coated article, and a release layer lying thereon.  
   
   
       12 . The multilayer laminate of  claim 11 , wherein said transparent substrate is a film.  
   
   
       13 . The coated article of  claim 4 , wherein the mar resistant protective layer is (A) a layer prepared by subjecting a radiation-polymerizable composition comprising a (meth)acrylic functional group-bearing organosilicon compound to radiation polymerization so as to effect curing; (B) a layer prepared by curing a composition comprising a hydrolyzable silyl group-bearing acrylic polymer; or (C) a layer composed of a thermoplastic acrylic resin containing methyl methacrylate as a major comonomer and having an excellent heat resistance and a high hardness.  
   
   
       14 . The coated article of  claim 13 , wherein the mar resistant protective layer contains fine particles of an inorganic oxide and/or a ultraviolet absorber.  
   
   
       15 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition of  claim 1 , serving as a chemical resistant film, said coating composition primarily comprising a mixture of 
 (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and optionally,    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to 100% by weight of the mixture.    
   
   
       16 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition of  claim 2 , serving as an antireflection film, said coating composition primarily comprising a mixture of 
 (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and optionally,    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to 100% by weight of the mixture.    
   
   
       17 . A coated article comprising 
 a transparent substrate,    a layer formed thereon having a higher refractive index than the substrate, and    a cured coat formed on a high refractive index layer from a protective coat-forming coating composition of  claim 3 , serving as an antireflection film, said coating composition primarily comprising a mixture of    (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and optionally,    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to 100% by weight of the mixture.    
   
   
       18 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition, serving as a chemical resistant film, said coating composition primarily comprising a co-hydrolyzate of a mixture of 
 (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to less than 100% by weight of the mixture.    
   
   
       19 . A coated article comprising a transparent substrate and a cured coat formed thereon from a protective coat-forming coating composition, serving as an antireflection film, said coating composition primarily comprising a co-hydrolyzate of a mixture of 
 (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to less than 100% by weight of the mixture.    
   
   
       20 . A coated article comprising 
 a transparent substrate,    a layer formed thereon having a higher refractive index than the substrate, and    a cured coat formed on a high refractive index layer from a protective coat-forming coating composition, serving as an antireflection film, said coating composition primarily comprising a co-hydrolyzate of a mixture of    (i) a disilane compound having the formula (A):      X m R 1   3-m Si—Y—SiR 1   3-m X m   (A)    wherein R 1  is a monovalent hydrocarbon group of 1 to 6 carbon atoms, Y is a divalent organo group containing at least one fluorine atom, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof and    (ii) a fluorinated organo group-containing organosilicon compound having the formula (B):      Rf—SiX 3   (B)    wherein Rf is a monovalent organo group containing at least one fluorine atom and X is a hydrolyzable group or a (partial) hydrolyzate thereof, wherein the content of component (i) is 60% by weight to less than 100% by weight of the mixture.    
   
   
       21 . The coated article of  claim 20 , further comprising a mar resistant protective layer between the substrate and the high refractive index layer.  
   
   
       22 . The coated article of  claim 20 , wherein the high refractive index layer comprises a metal oxide sol.  
   
   
       23 . The coated article of  claim 22 , wherein the metal oxide sol contains at least one element selected from among Ti, Sn, Ce, Al, Zr and In.  
   
   
       24 . The coated article of  claim 20 , wherein a coating composition from which the high refractive index layer is formed is thermosetting or photo-curing.  
   
   
       25 . The coated article of  claim 21 , wherein a coating composition from which the protective layer is formed is thermosetting or photo-curing.  
   
   
       26 . The coated article of  claim 18 , wherein said transparent substrate comprises an organic resin and/or an inorganic material such as glass or ceramics.  
   
   
       27 . The coated article of  claim 18 , wherein said transparent substrate comprises a polycarbonate resin, polyalkylene terephthalate resin, cellulose triacetate resin, polystyrene resin or polyolefin resin.  
   
   
       28 . A multilayer laminate comprising the coated article of  claim 18 , a tackifier or adhesive layer lying on the transparent substrate side of the coated article, and a release layer lying thereon.  
   
   
       29 . The multilayer laminate of  claim 28 , wherein said transparent substrate is a film.  
   
   
       30 . The coated article of  claim 21 , wherein the mar resistant protective layer is (A) a layer prepared by subjecting a radiation-polymerizable composition comprising a (meth)acrylic functional group-bearing organosilicon compound to radiation polymerization so as to effect curing; (B) a layer prepared by curing a composition comprising a hydrolyzable silyl group-bearing acrylic polymer; or (C) a layer composed of a thermoplastic acrylic resin containing methyl methacrylate as a major comonomer and having an excellent heat resistance and a high hardness.  
   
   
       31 . The coated article of  claim 30 , wherein the mar resistant protective layer contains fine particles of an inorganic oxide and/or a ultraviolet absorber.