Laminate having a top coat layer containing flaky metal oxide fine particles

Patent metadata

Field	Value
Publication number	US-10280272-B2
Application number	US-201314377303-A
Country	US
Kind code	B2
Filing date	Feb 20, 2013
Priority date	Feb 21, 2012
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A laminate having excellent abrasion resistance to physical stimuli such as dust. The laminate comprises a base layer, a hard coat layer and a top coat layer comprising flaky metal oxide fine particles all of which are formed in this order. The flaky metal oxide fine particles are hardened by at least one method selected from the group consisting of ionizing material exposure, ionizing radiation exposure, infrared exposure, microwave exposure and high-temperature vapor exposure.

First claim

The invention claimed is:

1. A laminate comprising:
(i) a base layer made of a thermoplastic resin selected from the group consisting of a polycarbonate resin (PC), a polymethyl methacrylate resin (PMMA), a polyethylene resin (PE) and a polyether sulfone resin (PES),
(ii) a hard coat layer having a thickness of 2 to 30 μm, and wherein the hard coat layer is a cured resin layer of

(A) a hard coating agent consisting essentially of:
(A-1) an alkoxysilane hydrolyzed condensate,
(A-2) colloidal silica, and
(A-3) a solvent, or

(B) a hard coating agent comprising:
(B-1) a polyfunctional acrylic resin and
(B-2) an alkoxysilane hydrolyzed condensate and/or colloidal silica,
wherein the hard coating agent has a total content of colloidal silica and an alkoxysilane hydrolyzed condensate of not less than 31 wt %, wherein the alkoxysilane is methyl trimethoxysilane, and
(iii) a top coat layer having a thickness of 5 to 20 nm and consisting essentially of flaky metal oxide fine particles, wherein the flaky metal oxide fine particles comprise at least one element selected from the group consisting of Ti, Nb, Al, Si, and Mg as a constituent element and have a thickness of 1 to 8 nm, and
wherein the base layer, the hard coat layer and the top coat layer are formed in this order.

2. The laminate according to claim 1 , wherein the top coat layer is formed by at least one method selected from the group consisting of ionizing material exposure, ionizing radiation exposure, infrared exposure, microwave exposure and high-temperature vapor exposure.

3. The laminate according to claim 1 , wherein the hard coat layer is (i) formed from a hard coating agent having a total content of colloidal silica and an alkoxysilane hydrolyzed condensate of not less than 31 wt % based on the total weight of the hard coating agent excluding a solvent, wherein the alkoxysilane is methyl trimethoxysilane, and (ii) has a water contact angle of 30° or less.

4. The laminate according to claim 1 which is a window member.

Assignees

• Teijin Ltd
• Tokai Ryokaku Tetsudo Kk

Inventors

• Ekinaka Tatsuya
• Suga Takehiro
• Kita Toshio
• Niimi Ryo
• Toyoshima yuta
• Shichi Tetsuya
• Yoshioka Daisuke
• Yamashita Makoto
• Okazaki Sohei
• Kaneko Yuji

Classifications

• Y10T428/256

  Heavy metal or aluminum or compound thereof · CPC title

• C08J2333/04

  esters · CPC title

• B05D2425/01

  top layer/ last layer, i.e. first layer from the top surface · CPC title

• Y10T428/258

  Alkali metal or alkaline earth metal or compound thereof · CPC title

• B05D3/0473

  for heating, e.g. vapour heating · CPC title