Polyimide waterborne epoxy coating and preparation method thereof
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A polyimide water-based and epoxy coating technology, used in the coating field, can solve the problems of limited types of water-based epoxy resin coating resins and poor performance, and achieve improved anti-floating and blooming properties, strong water resistance, and improved performance. The effect of water resistance
Active Publication Date: 2021-11-23
成都普利美特科技有限公司
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However, it can be better emulsified and used, and the types of resins used to make water-based epoxy resin coatings are limited, and the performance of water-based epoxy coatings is worse than that of conventional epoxy coatings.
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Embodiment 1
[0039] Prepare polyimide aqueous epoxy resin, the method is as follows:
[0040] (1) Add 1 mol of 1-amino-3-chloro-2-propanol hydrochloric acid and 1 mol of chlorosuccinic acid into NaOH aqueous solution (sodium hydroxide concentration 0.5 mol / L, dosage 1 L), stir and react at room temperature for 1 h, Solution I was prepared.
[0041] (2) Add 1 mol of disodium ethylene glycol and 1 mol of 3,5-dichlorobenzenesulfonic acid into NaOH aqueous solution (sodium hydroxide concentration 0.5 mol / L, dosage 1 L), stir and react at room temperature for 0.5 h to obtain Solution II.
[0042] (3) The solution I, the solution II and 1 mol of 3-chloro-5-epoxymethylbenzenesulfonic acid were mixed and stirred for 3 hours to prepare a polyimide water-based epoxy resin.
Embodiment 2
[0044] Prepare polyimide aqueous epoxy resin, the method is as follows:
[0045] (1) Add 1 mol of 1-amino-3-chloro-2-propanol hydrochloric acid and 1 mol of chlorosuccinic acid into NaOH aqueous solution (sodium hydroxide concentration 0.5 mol / L, dosage 1 L), stir and react at 40°C for 1 h , to prepare solution I.
[0046] (2) Add 20 mol of disodium ethylene glycol and 20 mol of 3,5-dichlorobenzenesulfonic acid into NaOH aqueous solution (sodium hydroxide concentration 0.5 mol / L, dosage 20 L), stir and react at 40°C for 0.5 h to prepare Solution II was obtained.
[0047] (3) Mix solution I, solution II with 1 mol of 3-chloro-5-epoxymethylbenzenesulfonic acid, stir and react at 40° C. for 3 hours to prepare a polyimide water-based epoxy resin.
Embodiment 3
[0049] A kind of polyimide water-based epoxy coating, comprises the component of following mass percentage: 50 parts of polyimide water-based epoxy resins of bisphenol A type epoxy resin, embodiment 1 preparation, 0.5 part of ethylenediamines , 1 part of Lewis acid, 1 part of BYK-3101, 0.1 part of sodium oleate, 1 part of GPE type defoamer, 5 parts of titanium dioxide, 8 parts of molybdenum chrome orange, 20 parts of calcium carbonate, 30 parts of mica powder, and 50 parts of water.
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Abstract
The invention discloses a polyimide waterborne epoxy coating. The polyimide waterborne epoxy coating comprises the following components in parts by weight: 10 parts of waterborne epoxy resin, 50-100 parts of polyimide waterborne epoxy resin, 0.5-2 parts of a curing agent, 0.5-2 parts of a flatting agent, 0.1-1 part of a dispersing agent, 0.2-2 parts of a defoaming agent, 10-20 parts of pigment, 10-100 parts of filler and 50-100 parts of water. A preparation method of the polyimide water-borne epoxy resin comprises the following steps: (1) subjecting 1-amino-3-chloro-2-propanol hydrochloric acid to reacting with chlorosuccinic acid in an alkaline aqueous solution for 1 hour to prepare a solution I; (2) subjecting ethylene glycol disodium to reacting with 3,5-dichlorobenzenesulfonic acid in an alkaline aqueous solution for 0.5 h to prepare a solution II; and (3) mixing the solution I, the solution II and 3-chloro-5-epoxy methylbenzenesulfonic acid, conducting stirring and reacting for 3 hours to prepare the polyimide water-borne epoxy resin. The coating disclosed by the invention has the advantages of high chemical stability, low construction environment requirement, environment friendliness, no toxicity, high water resistance of a cured product and the like, and has prominent popularization prospects.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to a polyimide water-based epoxy coating. Background technique [0002] The excellent physical, mechanical and electrical insulation properties of epoxy resin, the bonding performance with various materials, and the flexibility of its use process are not available in other thermosetting plastics. Therefore, it can be made into coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials, and is widely used in various fields of the national economy. Epoxy resins are non-toxic and are actually non-toxic products. However, most epoxy resin coatings are solvent-based coatings at present, which contain a large amount of volatile organic compounds (voc), which are toxic and flammable, thus causing harm to the environment and human body. When the voc in the environment exceeds a certain concentration, people will feel headache, nausea, v...
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