Hardcoats comprising perfluoropolyether polymers with poly(alkylene oxide) repeat units
Assignee3M Innovative Properties Company
InventorsEncai Hao, Zai-Ming Qiu, Yu Yang, Thomas P. Klun
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Abstract
Presently described are articles, such as optical displays and protective films, comprising a (e.g. light transmissive) substrate having a surface layer comprising the reaction product of a mixture comprising a non-fluorinated binder precursor (e.g. of a hardcoat composition) and at least one polymerizable perfluoropolyether polymer. The resulting cured surface layer can advantageously exhibit low lint attraction in combination with low surface energy. Also described are one-step and two-step methods of synthesizing perfluoropolyether polymers having polymerizable ethylenically unsaturated groups.
Claims10
A perfluoropolyether polymer is represented by the general formula:
- wherein
- MFPE represents repeat units derived from one or more mono-(meth)acrylate monomers having a perfluoropolyether group, the monomer having a Mw of at least 600 g/mole, and the polymer comprises 10 to 50 wt-% of MFPE;
- MAO represents repeat units derived from one or more (meth)acrylate monomers having an alkylene oxide repeat units;
- MMA represents units derived from (meth)acrylate monomers that lack a perfluoropolyether group and an alkylene oxide repeat unit;
- each X independently comprises an ethylenically unsaturated group;
- n and m each independently represent a value of 1 to 100 wherein the sum of n+m is at least 3;
- q represents a value of 0 to 100;
- and
- r and s each independently represent a value of 0 to 6 with the proviso that the sum of r+s is at least 1;
- wherein the MFPE units are bonded to the MAO units by means of polymerized (meth)acrylate linkages of a (meth)acrylate polymer backbone;
- and
- when q is 0, MAO is bonded to X by means of a urethane linkage and
- the polymer comprises MAO, MMA, or a combination thereof are bonded to X by means of a urethane linkage.
Dependencies are inferred from the claim text.