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Mirror back coating for water-based single-coating type copper-free silver-plated glass mirror as well as preparation method and application of mirror back coating

A copper silver-plated, single-coating technology, used in epoxy resin coatings, coatings, liquid chemical plating, etc., can solve the problems of accelerated acetic acid test, failure to meet the performance requirements of copper-free silver-plated glass mirrors, etc. Influence of coating film corrosion resistance, excellent chemical resistance, effect of improving xylene resistance

Active Publication Date: 2022-07-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the current performance of water-based copper-free silver-coated glass mirrors has certain defects in the performance of mirror back coatings, which do not meet the performance requirements of copper-free silver-coated glass mirrors, especially resistance to xylene, ferric chloride, and medium Salt spray test, copper accelerated acetic acid test and heat and humidity resistance

Method used

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  • Mirror back coating for water-based single-coating type copper-free silver-plated glass mirror as well as preparation method and application of mirror back coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of phosphoric acid modified epoxy resin (various raw materials are in weight percent)

[0030] Put 45% epoxy resin with an epoxy equivalent of 900-1000g / eq and 44% dipropylene glycol butyl ether into the stainless steel reaction kettle in turn, pass nitrogen protection throughout the process, and heat up to 125-130 ℃ to dissolve the epoxy resin in the reaction kettle , dropwise add 11% phosphoric acid, keep at 125-130 ℃ for 3-5 hours, filter and discharge.

[0031] (2) Preparation of methanol and isopropanol mixed etherified N-methylol acrylamide resin (various raw materials are in weight percent)

[0032] First, 5% dipropylene glycol butyl ether, 28% deionized water, 40% N-methylol acrylamide, and 6% 2-acrylamide-2-methanesulfonic acid were added to the stainless steel reaction kettle in turn. Pass nitrogen protection, heat up to 50-65 ℃ to dissolve the material, add 0.5% ammonium persulfate dropwise, keep at 50-65 ℃ for 3-4 hours; then add 0.5% phthal...

Embodiment 2

[0036] (1) Preparation of phosphoric acid modified epoxy resin (various raw materials are in weight percent)

[0037] Put 50% epoxy resin with an epoxy equivalent of 900-1000g / eq and 35% dipropylene glycol butyl ether into the stainless steel reaction kettle in turn, pass nitrogen protection throughout the process, and heat up to 125-130 ℃ to dissolve the epoxy resin in the reaction kettle , 15% phosphoric acid was added dropwise, and the temperature was kept at 125-130° C. for 3-5 hours to filter and discharge.

[0038] (2) Preparation of methanol and isopropanol mixed etherified N-methylol acrylamide resin (various raw materials are in weight percent)

[0039]First, 10% dipropylene glycol butyl ether, 3% deionized water, 45% N-methylol acrylamide, and 10% 2-acrylamide-2-methanesulfonic acid were added to the stainless steel reaction kettle in sequence. Pass nitrogen protection, heat up to 50-65 ℃ to dissolve the material, add 1% ammonium persulfate dropwise, keep at 50-65 ℃...

Embodiment 3

[0043] (1) Preparation of phosphoric acid modified epoxy resin (various raw materials are in weight percent)

[0044] Put 46.5% epoxy resin with an epoxy equivalent of 900-1000g / eq and 41.5% dipropylene glycol butyl ether into the stainless steel reactor in turn, pass nitrogen protection throughout the process, and heat up to 125-130 ℃ to dissolve the epoxy resin in the reactor , dropwise add 12% phosphoric acid, keep at 125-130 ℃ for 3-5 hours, filter and discharge.

[0045] (2) Preparation of methanol and isopropanol mixed etherified N-methylol acrylamide resin (various raw materials are in weight percent)

[0046] First, 8.5% dipropylene glycol butyl ether, 14.5% deionized water, 42.5% N-methylol acrylamide, and 7.5% 2-acrylamide-2-methanesulfonic acid were added to the stainless steel reaction kettle in sequence. Pass nitrogen protection, heat up to 50-65 ℃ to dissolve the material, add 1% ammonium persulfate dropwise, keep at 50-65 ℃ for 3-4 hours; then add 1% phthalic a...

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Abstract

The invention discloses a water-based single-coating type copper-free silver-plated glass mirror back coating, which comprises the following components in percentage by weight: 26.0 to 30.0 percent of phosphoric acid modified epoxy resin, 30.0 to 35.0 percent of methanol-isopropanol mixed etherified N-hydroxymethyl acrylamide resin, 0.5 to 1.0 percent of bentonite, 5.0 to 10.0 percent of iron oxide red, 10.0 to 15.0 percent of calcium carbonate, 2.0 to 5.0 percent of dipropylene glycol butyl ether, 0.5 to 1.0 percent of water-based base material wetting agent and the balance of water. 0.5%-1.0% of a water-based polysilyldioxane defoaming agent, and 2.0%-25.5% of deionized water. The invention further provides a preparation method and application of the mirror back coating for the water-based single-coating type copper-free silver-plated glass mirror. The water-based mirror back coating is sprayed on a passivated silver-plated layer, and the performance requirement of a copper-free silver-plated glass mirror can be met after a glass plate is baked for 5-7 minutes at the temperature of 105-150 DEG C.

Description

technical field [0001] The invention relates to the technical field of glass mirror processing, in particular to a water-based single-coating type copper-free silver-plated mirror back coating for glass mirrors, a preparation method and applications thereof. Background technique [0002] The copper-free silver-plated glass mirror is an improved glass mirror production process based on the silver-plated copper-plated glass mirror. Palladium is activated, then metal silver layer is plated through silver mirror reaction, and then inorganic passivation agent such as tin difluoride is used to replace the metal copper plating process, and then the back of the mirror is coated with primer and topcoat, and the primer is warmly baked on the glass plate. The topcoat is warmly baked on a glass plate, then cooled and packaged. This production process adds the previous spraying palladium chloride activation process. Compared with the previous production process of silver-coated copper-c...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D133/24C09D7/61C23C18/42C23C26/00C23C28/00
CPCC09D163/00C09D7/61C23C18/42C23C18/1689C23C18/1639C23C26/00C23C28/00C08K2003/2272C08K2003/265C08L33/24C08K3/346C08K3/22C08K3/26
Inventor 罗漫
Owner SHANGHAI JIAO TONG UNIV
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