摘要:
A time-temperature indicator device provides a visually observable indication of the cumulative thermal exposure of an object. The device includes a substrate having a diffusely light-reflective porous matrix and a backing. The backing includes on its surface a viscoelastic indicator material for contacting the substrate and a barrier material for substantially inhibiting the lateral and longitudinal flow of viscoelastic indicator material between the substrate and the backing.
摘要:
Adhesive compositions, including pressure sensitive adhesives, are the reaction product of free radically polymerizable mixtures. The free radically polymerizable mixtures include a free radically polymerizable urethane-based or urea-based oligomer, a free radically polymerizable segmented siloxane-based copolymer, and an initiator. The free radically polymerizable mixture may contain additional reactive and/or unreactive additives. The adhesive compositions can be used to prepare a variety of adhesive articles.
摘要:
Presently is described a free-radically polymerizable composition comprising a mixture of reaction products of i) at least one polyisocyanate; ii) at least one isocyanate reactive perfluoropolyether compound; iii) at least one isocyanate reactive compound comprising greater than 6 repeat units of ethylene oxide; and iv) at least one isocyanate reactive non-fluorinated crosslinker comprising at least two free-radically polymerizable groups.
摘要:
Presently is described a free-radically polymerizable composition comprising a mixture of reaction products of i) at least one polyisocyanate; ii) at least one isocyanate reactive perfluoropolyether compound; iii) at least one isocyanate reactive compound comprising greater than 6 repeat units of ethylene oxide; and iv) at least one isocyanate reactive non-fluorinated crosslinker comprising at least two free-radically polymerizable groups.
摘要:
Presently described are coating compositions comprising a polymerizable resin composition and a non-ionic unpolymerizable surfactant. In some embodiments, the coating comprises greater than 10 wt-% of non-ionic unpolymerizable surfactant. In other embodiments, the coating composition comprises an an additive comprising a silicone group or a fluorinated group and a hydrophobic group. Also described are articles comprising the cured coating compositions. In one embodiment, an article is described comprising a cured coating wherein the cured coating exhibits a property of an initially visible simulated fingerprint reducing in visibility in 1-20 minutes. Also described is a method of determining the fingerprint visibility of a coating composition and a polyacylate composition useful as an additive. In another embodiment a coated surface is described comprising a polymeric organic material comprising a plurality of pores wherein a portion of the pores are interconnected and comprise a lipophilic liquid.
摘要:
An apparatus for dispensing a fluid onto a moving substrate is disclosed. In one embodiment, the apparatus is a die comprising a die body having a cavity therein, wherein the cavity is in fluid communication with an applicator slot. The die is then oriented such that the applicator slot is positioned so as to dispense the fluid onto the moving substrate. The fluid is introduced into the die cavity such that the fluid is dispensed onto the moving substrate through the applicator slot. At least one end of the slot includes means for preventing lateral widening of the dispensed fluid. In another embodiment, means are disposed at both ends of the applicator slot. The apparatus is particularly useful when the capillary number characteristic for dispensing the fluid onto the moving substrate is less than 0.5.
摘要:
Presently described are optical substrates having a surface layer and optical displays comprising such optical substrates. The surface layer comprises the reaction product of a polymerizable mixture comprising at least one perfluoropolyether urethane polymeric material comprising at least two free-radically polymerizable groups and greater than 6 ethylene oxide repeat units and at least one non-fluorinated crosslinker comprising at least two free-radically polymerizable groups.
摘要:
The present invention includes optical coatings containing ultraviolet curable monomers employing a bromine substituted fluorene structure. The fluorene backbone of the monomers of the present invention may also be functionalized with one or more polymerizable or reactive functionalities, and most readily at the 9 position. Compositions of the present invention include the reactive bromosubstituted fluorenes combined with inorganic nanoparticles, particularly nanoparticles with reactive surface modifiers exhibiting polymerizable functionality. Reactive high index nanoparticles such as surface modified zirconia are contemplated.
摘要:
A time-temperature indicator device provides a visually observable indication of the cumulative thermal exposure of an object. The device includes a substrate having a diffusely light-reflective porous matrix and a backing. The backing includes on its surface a viscoelastic indicator material for contacting the substrate and a barrier material for substantially inhibiting the lateral flow of viscoelastic indicator material between the substrate and the backing.