Electroconductive laminate and touch panel using thereof
AssigneesTeijin Limited, Nippon Paint Automotive Coatings Co., Ltd.
InventorsKoichi IMAMURA, Atsushi SASAKI, Kazuhito KOBAYASHI, Yusuke NAKATA
Life of this patent
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Abstract
The present invention is an electroconductive laminate characterized in that the hard coat layer is formed from a hard coating composition which contains (A) a phenolic novolac acrylate having two or more acrylate groups, (B) a bisphenol structure-containing diacrylate having 2 to 4 moles of alkylene oxide structure with two or three carbon atoms in each molecule, (C) a polyfunctional acrylate having three or more acrylate groups, and (D) a polyfunctional urethane acrylate having three or more acrylate groups and an ester structure.
Claims14
An electroconductive laminate in which a hard coat layer and an electrically conducting layer are formed on at least one surface of a polycarbonate substrate, wherein
- the hard coat layer is obtained by a hard coating composition comprising
- (A) a phenolic novolac acrylate having two or more acrylate groups,
- (B) a bisphenol structure-containing diacrylate having 2 to 4 moles of alkylene oxide structure with two or three carbon atoms in each molecule,
- (C) a polyfunctional acrylate having three or more acrylate groups, and
- (D) a polyfunctional urethane acrylate having three or more acrylate groups and an ester structure, wherein
- the hard coating composition comprises
- 15 to 25 parts by mass of the phenolic novolac acrylate (A),
- 25 to 35 parts by mass of the bisphenol structure-containing diacrylate (B),
- 25 to 35 parts by mass of the polyfunctional acrylate (C), and
- 15 to 25 parts by mass of the polyfunctional urethane acrylate (D), with respect to 100 parts by mass of a resin content in the hard coating composition, and wherein
- the electroconductive laminate is substantially free of a resin component that may volatilize during heat treatment of the electroconductive laminate carried out at 130° C. for 2 hours.
An electroconductive laminate in which a hard coat layer, a color difference adjusting layer, and an electrically conducting layer are formed on at least one surface of a polycarbonate substrate, wherein
- the hard coat layer is obtained by a hard coating composition comprising
- (A) a phenolic novolac acrylate having two or more acrylate groups,
- (B) a bisphenol structure-containing diacrylate having 2 to 4 moles of alkylene oxide structure with two or three carbon atoms in each molecule,
- (C) a polyfunctional acrylate having three or more acrylate groups, and
- (D) a polyfunctional urethane acrylate having three or more acrylate groups and an ester structure, wherein
- the hard coating composition comprises
- 15 to 25 parts by mass of the phenolic novolac acrylate (A),
- 25 to 35 parts by mass of the bisphenol structure-containing diacrylate (B),
- 25 to 35 parts by mass of the polyfunctional acrylate (C), and
- 15 to 25 parts by mass of the polyfunctional urethane acrylate (D), with respect to 100 parts by mass of a resin content in the hard coating composition, wherein
- the electroconductive laminate is substantially free of the resin component that may volatilize during a heat treatment of the electroconductive laminate carried out at 130° C. for 2 hours, wherein
- the color difference adjusting layer is obtained by a composition comprising a curing resin component (i), and at least one of metal oxide particles having an average primary particle diameter of 100 nm or less (ii) and metal fluoride particles having an average primary particle diameter of 100 nm or less (iii), and
- where a total mass of the particles (ii) and (iii) in the color difference adjusting layer is 0-200 parts by mass with respect to 100 parts by mass of the curing resin component (i), and wherein
- a difference ΔR of R1 and R2 is equal to or less than 1, wherein R1 is a reflectance obtained by irradiation with a light source having a wavelength in a range of 500 to 750 nm toward the electroconductive laminate, and R2 is a reflectance obtained by irradiation with a light source having a wavelength in a range of 500 to 750 nm toward an electroconductive laminate after immersion into a strong acid aqueous solution at 40° C. for three minutes and dried, wherein the strong acid aqueous solution is obtained by a mixing of 12 N hydrochloric acid, 16 N nitric acid and water in a mass ratio of 12 N hydrochloric acid:16 N nitric acid:water being 3.3:1.0:7.6.
Dependencies are inferred from the claim text.