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Aqueous strippable resin, preparation method and applications,

A water-based, resin-based technology, applied in coatings and other directions, can solve the problems of many preparation steps, time-consuming and labor-intensive, complex process, etc., and achieve the effects of no environmental pollution, isolation of adverse effects, and low VOC content.

Inactive Publication Date: 2017-07-25
HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN102863888B provides a peelable heat-resistant and anti-rust protective film coating, which is obtained by curing hydroxyl-containing linear polyester resin or acrylic resin and isocyanate polymer. The coating does not contain solvents and has high water resistance , oil resistance, temperature resistance, abrasion resistance and peelability; however, the coating adopts a two-component curing method, which requires many preparation steps, and the isocyanate polymer used has safety risks
Patent CN103360931A discloses a water-based peelable coating with water-based polyurethane and styrene-acrylic emulsion as the main components. Its film-forming water resistance, salt resistance and corrosion resistance are excellent; but the coating needs to be sprayed 3-4 times and needs to be dried. It takes 7 days to carry out the performance test. The dry film thickness is 80-90 μm. The process is complicated, time-consuming and labor-intensive, and the film thickness is still relatively large, and the amount of paint used is large

Method used

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  • Aqueous strippable resin, preparation method and applications,
  • Aqueous strippable resin, preparation method and applications,
  • Aqueous strippable resin, preparation method and applications,

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A water-based peelable resin is prepared by the following preparation method:

[0031] (1) Put 10 parts by weight of polypropylene glycol with a molecular weight of 2000 into the reactor, raise the temperature to 100°C, vacuum dehydrate for 0.5h, then cool it down to 50°C and stop vacuuming, and add 5 parts by weight in turn under stirring Toluene diisocyanate, 1 part by weight of 1,4-butanediol, 1.2 parts by weight of dimethylolpropionic acid and 0.01 part by weight of stannous octoate, after the temperature is stabilized, slowly raise the temperature and control the reaction temperature at 70 ° C, react for 2 hours, Use the di-n-butylamine method to measure the NCO content in the prepolymer. After the NCO content is stabilized at 1.5-2.5%, cool down to 60°C, add 0.5 parts by weight of hydroxyethyl methacrylate, react for 1 hour, and cool down to 40°C. Add 1 part by weight of triethylamine, and after neutralizing for 15 minutes, add 1.5 parts by weight of methyl methac...

Embodiment 2

[0034] A water-based peelable resin is prepared by the following preparation method:

[0035](1) Put 10 parts by weight of polyethylene adipate with a molecular weight of 3000 into the reactor, heat up to about 100°C, vacuum dehydrate for 1 hour, then cool it down to 60°C, stop vacuuming, and stir Add 8 parts by weight of isophorone diisocyanate, 2 parts by weight of diethylene glycol, 1.4 parts by weight of dimethylol butyric acid and 0.02 parts by weight of dibutyltin dilaurate. After the temperature is stable, slowly heat up and control The reaction temperature is 80°C, react for 3 hours, measure the NCO content in the prepolymer by the di-n-butylamine method, after the NCO content is stabilized at 1.5-2.5%, cool down to 60°C, add 1.0 parts by weight of hydroxyethyl acrylate, React for 2 hours, lower the temperature to 50°C, add 1 part by weight of triethylamine, neutralize for 20 minutes, add 2 parts by weight of methyl methacrylate and 1 part by weight of n-butyl acrylate...

Embodiment 3

[0038] A water-based peelable resin is prepared by the following preparation method:

[0039] (1) Put 10 parts by weight of polytetrahydrofuran diol with a molecular weight of 2000 into the reactor, raise the temperature to about 120°C, vacuum dehydrate for 1 hour, then cool it down to 60°C and stop vacuuming, and add 10 parts by weight in turn under stirring 2 parts by weight of hexamethylene diisocyanate, 2 parts by weight of ethylenediamine, 2 parts by weight of dimethylolpropionic acid and 0.05 parts by weight of dibutyltin diacetate. After the temperature is stabilized, slowly raise the temperature and control the reaction temperature at 90°C for 2 hours , use the di-n-butylamine method to measure the NCO content in the prepolymer. After the NCO content is stabilized at 1.5-2.5%, cool down to 70°C, add 1.5 parts by weight of hydroxypropyl acrylate, react for 2 hours, and cool down to 50°C. Add 0.6 parts by weight of sodium hydroxide, after neutralizing for 30 minutes, add...

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Abstract

The present invention discloses an aqueous strippable resin, a preparation method and applications, wherein the aqueous strippable resin is prepared from the following components by weight: 10-20 parts of polyether diol or polyester diol, 5-10 parts of diisocyanate, 1-2 parts of a small molecule chain extender, 1-2 parts of a hydrophilic chain extender, 0.5-1.5 parts of a double bond end-capping agent, 0.01-0.05 part of a catalyst, 0.6-2 parts of a neutralization agent, 5-10 parts of an acrylic monomer, 0.1-0.5 part of an initiator, and 40-60 parts of water. The prepared aqueous strippable resin of the present invention integrates the performances of polyacrylate and polyurethane, and can meet suitable adhesion and good releasability.

Description

technical field [0001] The invention relates to the field of polymer materials, more specifically, to a water-based peelable resin and its preparation method and application. Background technique [0002] Metal surfaces often encounter occasions that require temporary protection, and the transportation process is the most common, such as surface protection of aluminum alloy and plastic steel doors and windows when they leave the factory, to prevent surface scratches, etc., to avoid affecting the appearance and lowering the product grade. In addition to the transportation process, there are also occasions where temporary protection is required during the intermediate processing of the processing plant, such as metal stamping, brushed aluminum plates, sputtering templates, etc., which require temporary shielding protection for the metal surface of the substrate to ensure The final quality and aesthetic effect of the product will not be affected during the processing. Generall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08G18/67C08G18/66C08G18/48C08G18/42C08G18/32C08G18/34C09D151/08C09D5/20
CPCC08F283/006C08G18/12C08G18/672C09D5/20C09D151/08C08F220/14C08G18/0823C08G18/6692C08G18/6659
Inventor 钱涛郎伟敏邓庆芝刘海龙李希徐凯
Owner HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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