Transparent laminate

Patent metadata

Field	Value
Publication number	US-2017209308-A1
Application number	US-201515329779-A
Country	US
Kind code	A1
Filing date	Jul 9, 2015
Priority date	Jul 30, 2014
Publication date	Jul 27, 2017
Grant date	—

Abstract

A transparent laminate including: transparent substrate; and structure layer which contains protrusion portions, depression portions, or both on a surface thereof, average distance between the protrusion portions adjacent or the depression portions adjacent being equal to or less than wavelength of visible light; the structure layer including polymerized product of active-energy-ray-curable resin composition including composition of (meth)acrylate-based-polymerizable compound; the composition including at least any of the following (A) and (B), and the following (C) and (D): (A) ester (meth)acrylate of trihydric alcohol having main and side chain each including alkyl chain; (B) ester di(meth)acrylate of ethylene-oxide-modified bisphenol A; (C) polyalkylene glycol di(meth)acrylate; and (D) ester di(meth)acrylate of dihydric alcohol having main chain including linear alkyl chain; water contact angle on the surface of the structure layer being 26° or more and 74° or less; and storage elastic modulus at 180° C. of the structure layer being less than 0.5 GPa.

First claim

1 . A transparent laminate comprising:
a transparent substrate; and a structure layer, wherein the structure layer contains protrusion portions, depression portions, or both on a surface thereof, and an average distance between the protrusion portions adjacent or an average distance between the depression portions adjacent is equal to or less than a wavelength of visible light; the structure layer comprises a polymerized product of an active energy ray curable resin composition; the active energy ray curable resin composition comprises a composition of a (meth)acrylate-based polymerizable compound; the composition of a (meth)acrylate-based polymerizable compound comprises at least any of the following (A) and (B), and the following (C) and (D):
(A) an ester (meth)acrylate of a trihydric alcohol having a main chain and a side chain each comprising an alkyl chain;
(B) an ester di(meth)acrylate of ethylene oxide-modified bisphenol A;
(C) a polyalkylene glycol di(meth)acrylate; and
(D) an ester di(meth)acrylate of a dihydric alcohol having a main chain comprising a linear alkyl chain;
a water contact angle on a surface of the structure layer is 26° or more and 74° or less; and a storage elastic modulus at 180° C. of the structure layer is less than 0.5 GPa.

2 . The transparent laminate according to claim 1 , wherein the composition of a (meth)acrylate-based polymerizable compound comprises the (A), (B), (C) and (D).

3 . The transparent laminate according to claim 1 , wherein the composition of a (meth)acrylate-based polymerizable compound comprises the (A) or the (B), the (C), and the (D), and the water contact angle is 26° or more and 60° or less.

4 . The transparent laminate according to claim 1 , wherein the ester (meth)acrylate (A) of a trihydric alcohol having a main chain and a side chain each comprising an alkyl chain is trimethylolpropane triacrylate.

5 . The transparent laminate according to claim 4 , wherein a content of the trimethylolpropane triacrylate in the composition of a (meth)acrylate-based polymerizable compound is less than 24.8% by mass.

6 . The transparent laminate according to claim 1 , wherein the polyalkylene glycol di(meth)acrylate (C) contains polyethylene glycol diacrylate having more than 8 ethylene oxide (EO) chain repeating units.

7 . The transparent laminate according to claim 1 , wherein a tensile elongation at break of the structure layer is 0.65% or more.

8 . The transparent laminate according to claim 1 , for use as a face protective optical element.

Assignees

• Dexerials Corp

Inventors

• Kakinuma Masayasu
• Takenouchi Masaki
• Ohta Eiji
• Kawamura Satoshi
• Ogawa Maki

Classifications

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• G02B1/118

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title

• A61F9/02

  Goggles (for swimming A63B33/00) · CPC title