Ceramer composition and composite comprising free radically curable fluorochemical component
Assignee3M Innovative Properties Company
InventorsSoonkun Kang, George G. I. Moore, Thomas W. Rambosek
Life of this patent
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Abstract
A ceramer composition is provided that comprises a plurality of colloidal inorganic oxide particles and a free-radically curable binder precursor. The free-radically curable binder precursor comprises a fluorochemical component that further comprises at least two free-radically curable moieties and at least one fluorinated moiety. By virtue of the inclusion of the fluorochemical component, the ceramer compositions of the present invention can be used to provide ceramer composites and ceramer composite structures with excellent stain, oil and/or water repellency characteristics as well as a high level of abrasion resistance and hardness.
Claims28
A free-radically curable ceramer composition comprising:
- (a) a plurality of colloidal inorganic oxide particles wherein said colloidal inorganic oxide particles are surface treated with a surface treatment agent comprising a curable fluoro/silane component of the formula:
- (Sv)r—W—(Rf)s (7)
- wherein each Sy independently is a hydrolyzable silane moiety,
- each Rf is defined by the formula CnF2+1, where n is 3 to 20 and one or more non-adjacent —CF2— groups may be replaced by oxygen,
- r is at least 1, s is at least 1, and
- W is a linking group having r+s valent sites, and
- (b) a free-radically curable binder precursor, wherein said free-radically curable binder precursor comprises a free-radically curable fluorochemical component comprising at least two free-radically curable moieties and at least one fluorinated moiety.
A free-radically cured ceramer composite, said composite being derived from
- (a) a plurality of colloidal inorganic oxide particles wherein said colloidal inorganic oxide particles are surface treated with a surface treatment agent comprising a curable fluoro/silane component of the formula:
- (Sv)r—W—(Rf)s (7)
- wherein each Sy independently is a hydrolyzable silane moiety,
- each Rf is defined by the formula CnF2n+1, where n is 3 to 20 and one or more non-adjacent —CF2— groups may be replaced by oxygen,
- r is at least 1, s is at least 1, and
- W is a linking group having r+s valent sites, and
- (b) a free-radically curable binder precursor, wherein said free-radically curable binder precursor comprises a free-radically curable fluorochemical component comprising at least two free-radically curable moieties and at least one fluorinated moiety.
A ceramer composite structure, comprising:
- (a) a polymeric substrate having a coatable surface;
- (b) a free-radically cured ceramer composite provided on the surface of the substrate, said composite being derived from:
- (i) a plurality of colloidal inorganic oxide particles wherein said colloidal inorganic oxide particles are surface treated with a surface treatment agent comprising a curable fluoro/silane component of the formula:
- (Sv)r—W—(Rf)s (7)
- wherein each Sy independently is a hydrolyzable silane moiety,
- each Rf is defined by the formula CnF2n+1, where n is 3 to 20 and one or more non-adjacent —CF2— groups may be replaced by oxygen,
- r is at least 1, s is at least 1, and
- W is a linking group having r+s valent sites, and
- (ii) a free-radically curable binder precursor, wherein said free-radically curable binder precursor comprises a free-radically curable fluorochemical component comprising at least two free-radically curable moieties and at least one fluorinated moiety.
The ceramer composite structure of 20, wherein the free-radically curable fluorochemical component is represented by the formula:
- (RA)x—W—(Rf)y
- wherein each RA independently represents a free-radically curable moiety, each Rf independently represents a fluorinated moiety, x is at least 2;
- y is at least 1;
- and W is a linking group having x+y valent sites.
A method of making a ceramer composite structure, comprising the steps of:
- (a) coating at least a portion of a substrate surface with a free-radically curable ceramer composition, wherein the free-radically curable ceramer composition comprises:
- (i) a plurality of colloidal inorganic oxide particles wherein said colloidal inorganic oxide particles are surface treated with a surface treatment agent comprising a curable fluoro/silane component of the formula:
- (Sv)r—W—(Rf)s (7)
- wherein each Sy independently is a hydrolyzable silane moiety,
- each Rf is defined by the formula CnF2+1, where n is 3 to 20 and one or more non-adjacent —CF2— groups may be replaced by oxygen,
- r is at least 1, s is at least 1, and
- W is a linking group having r+s valent sites, and
- (ii) a free-radically curable binder precursor, wherein said free-radically curable binder precursor comprises a free-radically curable fluorochemical component comprising at least two free-radically curable moieties and at least one fluorinated moiety;
- and
- (b) irradiating the coated substrate with an amount of curing energy under conditions effective to at least partially cure the coated free-radically curable ceramer composition, whereby the ceramer composite is formed on the substrate.
Dependencies are inferred from the claim text.