Back coating composition and mirror

A technology of composition and coating, applied in the direction of mirrors, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as silver mirror film corrosion, and achieve excellent acid resistance

Inactive Publication Date: 2012-07-18
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing back coating film cannot sufficiently suppress corrosion caused by acid, and the silv...

Method used

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  • Back coating composition and mirror
  • Back coating composition and mirror
  • Back coating composition and mirror

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0107] According to the composition ratio shown in the column of Example 1 of Table 1, each raw material was sealed in a paint shaker and shaken for 15 minutes to prepare a back coating composition.

[0108] Spray a silver plating solution made of a solution containing silver nitrate and a reducing solution that reduces silver on the surface of a fully cleaned glass substrate (size 90mm×40mm×5mm), and the silver is precipitated by the silver mirror reaction to form a film with a thickness of 1.0g / m 2 silver mirror mask.

[0109] After the surface of the silver mirror film is washed with water, a copper plating solution consisting of a solution containing copper sulfate and a reducing solution for reducing copper is sprayed on the surface, and copper is precipitated by an electroless plating method to form a film thickness of 0.3 / m 2 copper protective film.

[0110] After the surface of the copper protective film was washed with water and dried, the temperature of the glass...

example 2～16

[0116] Each raw material was prepared according to the composition ratio shown in the columns of Examples 2-16 of Tables 1-3, and the back coating composition which has the composition described in each column was prepared, respectively.

[0117] Except changing the back coating composition, the same operation as Example 1 was carried out to obtain mirrors (with copper protective film and without copper protective film).

example 17～32

[0119] Each raw material was prepared according to the composition ratio shown in the columns of Examples 17-32 of Tables 4-6, and the back coating composition which has the composition described in each column was prepared, respectively.

[0120] Except changing the back coating composition, the same operation as Example 1 was carried out to obtain mirrors (with copper protective film and without copper protective film).

[0121] Based on the evaluation results of the viscosity of the back coating compositions described in Examples 1 to 32, the following hydrochloric acid test (1) and the following hydrochloric acid test (2) were performed on mirrors obtained using the back coating compositions described in Examples 1 to 32. The results of the performance test and the results of evaluating the appearance of the coating film of the back coating composition are shown in Tables 1-6, respectively.

[0122] (hydrochloric acid test (1))

[0123] A mirror of size 90 mm x 40 mm was ...

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PUM

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Abstract

Disclosed is a back coating composition capable of forming a back coating film which is not susceptible to acid erosion, and also disclosed is a mirror having excellent acid resistance. A back coating film (14) is formed on a metal film (a silver mirror film (12) or a metal protective film (13)) of a mirror (10) using a back coating composition containing a thermosetting resin, a pigment, and a dispersant, wherein an amino group-containing polymer which has an amine value of 20 mg KOH/g or more and does not have an acid group is contained as the dispersant.

Description

technical field [0001] The present invention relates to a back coating composition for forming a back coating film on the back surface of a mirror, and a mirror having a back coating film formed on the back surface thereof. Background technique [0002] In a mirror with a silver mirror film formed on a glass substrate, in order to prevent corrosion of the silver mirror film, a copper protective film is formed on the silver mirror film, and a back coating film is formed on the copper protective film. [0003] As a back coating composition for forming a back coating film, a composition containing a thermosetting resin (epoxy resin, alkyd resin, etc.) and a pigment (extender pigment, antirust pigment, etc.) is generally used (see Patent Document 1, 2). [0004] However, conventional back-coating films cannot sufficiently suppress corrosion caused by acid, and mirrors installed in bathrooms, powder rooms, washrooms, etc. may be corroded by strong acidic chemicals. Therefore, d...

Claims

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Application Information

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IPC IPC(8): C09D201/00C09D5/08C09D7/12C09D163/00G02B5/08
CPCC09D201/025C09D7/02G02B5/08C08G59/4021C09D163/00C09D7/45
Inventor 阿部啓介加藤朱美
Owner ASAHI GLASS CO LTD
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