Epoxy-functionalized perfluoropolyether polyurethanes
Assignee3M Innovative Properties Company
InventorsZai-Ming Qiu, John C. Hulteen
Life of this patent
Estimating the term…
Abstract
Disclosed are epoxy-functionalized perfluoropolyether polyurethane compounds having the following general structure (RfQX1C(O)NH)m—Ri—(NHC(O)X2Q(E)o)n wherein Rf is a monovalent perfluoropolyether moiety; Q is independently a connecting group of valence at least 2, which may contain heteroatoms; X1 is O, S, or NR, wherein R is H or a lower alkyl of 1 to 4 carbon atoms; Ri is a residue of a multi-isocyanate; X2 is O, S, or NR, wherein R is a lower alkyl of 1 to 4 carbon atoms; E is an organic group having at least one oxirane ring; m is at least 1; n is at least 1; o is 1, 2 or 3; and m+n is from 2 to 10.
Claims17
A phototool comprising an optically clear substrate having a designed pattern, and a protective layer on at least a portion of the substrate;
- wherein the protective layer comprises an at least partially cured hardcoat composition;
- wherein the hardcoat composition comprises:
- (a) one or more epoxy silane compounds;
- (b) one or more epoxy-functionalized perfluoropolyether polyurethane compounds;
- and
- (c) photo-acid generator;
- wherein the epoxy-functionalized perfluoropolyether polyurethane compound has the following general structure:
- (RfQX1C(O)NH)mRi—(NHC(O)X2Q(E)o)n
- wherein:
- Rf is a monovalent perfluoropolyether moiety;
- Q is independently a connecting group of valence at least 2, which may contain heteroatoms;
- X1 is O, S or NR, wherein R is H or a lower alkyl of 1 to 4 carbon atoms;
- Ri is a residue of a multi-isocyanate;
- X2 is O, S, or NR, wherein R is a lower alkyl of 1 to 4 carbon atoms;
- E is an organic group having at least one oxirane ring;
- m is at least 1;
- n is at least 1;
- o is 1, 2 or 3;
- and
- m+n is from 2 to 10.
Dependencies are inferred from the claim text.