Hardcoats having low surface energy and low lint attraction
Assignee3M Innovative Properties Company
InventorsRichard J. Pokorny, Thomas P. Klun
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Abstract
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 hydrocarbon-based hardcoat composition and at least one perfluoropolyether urethane additive. The surface layer exhibits low lint attraction in combination with high contact angles. Hardcoat coating compositions comprising a perfluoropolyether urethane additive and a silicone(meth)acrylate additive are also described.
Claims30
An article comprising a substrate having a surface layer comprising the reaction product of a mixture comprising
- i) a hydrocarbon-based hardcoat composition;
- ii) at least one perfluoropolyether urethane additive having a perfluoropolyether moiety and at least one free-radically reactive group;
- wherein the surface layer exhibits less than 20% haze according to the Cellulose Surface Attraction Test and a static contact angle with water of at least 80°.
A hardcoat coating composition comprising:
- i) at least 75 wt-% of a hydrocarbon-based hardcoat composition;
- ii) up to 5 wt-% solids of one or more perfluoropolyether urethane additives having a perfluoropolyether moiety and at least one free-radically reactive group;
- and
- iii) up to 20 wt-% of one or more free-radically polymerizable silicone(meth)acrylate additives.
A method of measuring lint attraction comprising
- cleaning a surface of a test specimen;
- applying cellulose fibers to the test specimen surface;
- and
- measuring the haze of the cellulose coated surface.
Dependencies are inferred from the claim text.