Mitsubishi Rayon Company, Limited

Mitsubishi Chemical Corporation

Nissan Motor Company Limited

Mitsubishi Motor Co., Ltd.

Yusuke Nakai

Go Otani

Satoru Ozawa

Eiko Okamoto

Katsuhiro Kojima

Tetsuya Jigami

Tadashi Nakamura

Seiichiro Mori

Tsuyoshi Takihara

Shinji Makino

Isao Yamamoto

Takayuki Fukui

Hiroshi Onomoto

Masashi Ikawa

Haruo Unno

Kousuke Fujiyama

Keiko Yasukawa

Masayuki Uchida

A structure with a substrate, and a fine-unevenness-structure layer provided to at least one surface of the substrate, wherein the fine-unevenness-structure layer is disposed at a surface of the structure, the indentation elastic modulus of the structure is 1-1300 MPa, and the ratio (&#x394;&#x3bc;) of the rate of change of the coefficient of kinetic friction of the surface of the structure is 0.15-1.05, wherein &#x394;&#x3bc;=&#x394;&#x3bc;f/&#x394;&#x3bc;s: &#x394;&#x3bc;s represents the rate of change of the coefficient of kinetic friction of the surface of the structure at an initial-abrasion stage of a reciprocating abrasion test; and &#x394;&#x3bc;f represents the rate of change of the coefficient of kinetic friction of the surface of the structure immediately prior to the end of the reciprocating abrasion test. This structure exhibits excellent scratch resistance without compromising on the optical performance thereof, such as the antireflection performance.

Structure, production method thereof, and article provided with said structure

Described are: an active-energy-ray-curable composition () containing a phosphate ester compound of which an aqueous solution prepared by extracting with 50 mL of water per 1 g of the phosphate ester compound has a pH value of 6.5 to 7.5 at 25&#xb0; C., wherein the value of (the concentration of phosphoric acid in the aqueous solution, expressed in mass ppm)&#xd7;(the content of the phosphate ester compound in the active-energy-ray-curable composition, expressed in mass %) is 50 or less; and a process for producing a transparent film () which includes the active-energy-ray-curable composition () and in which a cured resin layer () having a fine uneven structure is formed on the surface of a base film ().

Active-energy-ray-curable composition, and process for producing transparent film having fine uneven structure on surface thereof

Provided is an article having high scratch resistance and satisfactory fingerprint wipeability. Disclosed is an article having a microrelief structure containing a cured product of a resin composition on the surface, in which the indentation elastic modulus (X) [MPa] and the creep deformation ratio (Y) [%] of the cured product satisfy the following formulas (1) and (2):80&#x2266;&#x2266;560&#x2003;&#x2003;(1)&#x2266;(0.00022&#x2212;0.01)&#xd7;100&#x2003;&#x2003;(2).

Article and active energy ray-curable resin composition

A method for producing a product having an uneven microstructure on a surface thereof includes: a step (I) which treats a surface of a roll mold () having an uneven microstructure thereon with an external release agent containing a fluorine and not containing a functional group (B) which reacts with a functional group (A) existing on the surface of the product; and a step (II) which obtains the product having the uneven microstructure on the surface thereof () by inserting an active energy ray curable resin composition () including an internal release agent between the roll mold () and a film (substrate) () after the step (I). Then, the composition is hardened by being irradiated with an active energy ray and a cured resin layer () having a surface, onto which the uneven microstructure is transferred, is formed on the surface of the film ().

Method for producing product having uneven microstructure on surface thereof

The present invention relates to a resin composition for a nano concave-convex structure, including 0.01 to 10 parts by mass of an active energy ray polymerization initiator (D), 0.01 to 3 parts by mass of a release agent (E), and 0.01 to 3 parts by mass of a lubricant (F), relative to 100 parts by mass of a polymerization reactive monomer component containing 50 to 95 parts by mass of a tetrafunctional (meth)acrylate monomer (A), 5 to 35 parts by mass of a difunctional (meth)acrylate monomer (B) in which the total number of repeating units within a polyalkylene glycol structure is from 4 to 25, and not more than 15 parts by mass of a monofunctional (meth)acrylate monomer (C) which is copolymerizable with the monomers (A) and (B), and relates to a transparent member for the monitor of a vehicle navigation device and the cover of a vehicle meter.

Resin composition for nano concave-convex structure, transparent member for monitor of vehicle navigation device and transparent member for cover of vehicle meter using same composition

A method for manufacturing a light transmissive film having a cured resin layer with a fine concavo-convex structure on a surface of a base material film is provided. The method includes sandwiching an active energy ray-curable composition including a mold dissolving component between a mold having an inversion structure of the fine concavo-convex structure and the base material film, obtaining a light transmissive film in which a cured resin layer having the inversion structure of the mold transferred is formed on one surface of the base material film, and separating the obtained light transmissive film and the mold. Thus, it is possible to productively manufacture a light transmissive film, and to prevent the deposition of an attachment on the mold surface and the contamination of the mold surface. Moreover, a light transmissive film can be manufactured having excellent performances, such as antireflection properties.

Method for manufacturing light transmissive film, active energy ray-curable composition, and light transmissive film

The present invention provides an active energy ray-curable resin composition comprising at least a multifunctional monomer having three or more radical polymerizable functional groups in the molecule in which the cured product of the composition exhibits anti-reflective function because of an uneven microstructure formed on the surface of the cured product, and provides a product having the uneven microstructure having high decontaminating properties such as fingerprint removal properties and high scratch resistance.

Active energy ray-curable resin composition, product having the uneven microstructure, and method for producing product having the uneven microstructure

A method for preparing an article having an uneven microstructure on a surface thereof, including coating a surface of a mold having an uneven microstructure formed from an anodized alumina oxide on a surface with a release treatment solution including a mold release agent that includes one or more kinds of phosphoric ester compound and the pH of the aqueous solution when extracted with 50 mL of water with respect to 1 g of the mold release agent is 3.0 or more; and interposing an active energy ray curable resin composition including a polymerizable compound, a polymerization initiator, and an internal release agent between the mold and the substrate, and curing the active energy ray curable resin composition by the irradiation with active energy rays to form a cured resin layer having the uneven microstructure transferred on a surface of the substrate.

Method for preparing article having uneven microstructure on surface thereof

The present invention relates to a production method for a product having a cured resin layer with a fine concave-convex structure formed on the surface of a substrate, the method including filling the space between a mold having a fine concave-convex structure composed of anodized alumina on the surface and a substrate with an active energy ray-curable resin composition, and curing the composition by irradiation with active energy rays, thereby forming a cured resin layer into which the fine concave-convex structure has been transferred on the surface of the substrate, wherein (A) the method includes treating the surface of the mold with a release agent, at least at transfer initiation, and (B) the active energy ray-curable resin composition includes a polymerizable compound, a polymerization initiator and a (poly)oxyethylene alkyl phosphate ester compound.

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Otake, Japan

Yusuke Nakai