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Anonymous users2024-02-06Epoxy resin, raw materials used:
1.Bisphenol A. It is the main raw material used in epoxy resin, and there are also those that use bisphenol F.
2.Epichlorohydrin. Ring opening reacts with bisphenol A, and then closes the loop to form epoxy resin.
3.Flake alkali. It is a catalyst for the reaction and a raw material for dechlorination cyclization.
4.Toluene. In the production of liquid epoxy resins, it is used as a solvent to reduce viscosity and density.
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Anonymous users2024-02-05The raw materials of epoxy resin mainly include ethylenediamine, dibutyl ester, and the synthesis method of epoxy resin, with bisphenol A and epichlorohydrin as raw materials, and low molecular weight epoxy resin is formed under the action of catalyst. At present, a trend is to use bimodal epoxy resin, that is, two kinds of epoxy resins with high relative molecular weight and bottom are mixed, solvent is added, and a certain proportion of low relative molecular weight epoxy resin can be added to form bimodal epoxy resin.
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Anonymous users2024-02-04The main raw materials of epoxy resin are bisphenol A and epichlorohydrin, and most of the epoxy resins in the epoxy resin have a high unit consumption of bisphenol A, and the amount of other related raw materials is small.
Bis-royal phenol A, scientific name 2,2-bis(4-hydroxyphenyl)propane, referred to as diphenol propane. White crystals, melting point 156 158 . It is mainly used in the preparation of epoxy resins and polycarbonates, and its potash or sodium salt is the raw material for the production of polysulfone, and in small quantities is used as a rubber antioxidant (see rubber additives).
Epichlorohydrin is a kind of rubber compound, the main use is used in the production of epoxy resin, is also a stabilizer and chemical intermediate of oxygen-containing substances, epoxy and phenoxy resin is the main raw material for the manufacture of glycerin, cured propylene-based rubber cellulose ester and ether solvent high wet strength resin in the paper industry.
Material properties: Epoxy resin has a secondary hydroxyl group and an epoxy group, and the secondary hydroxyl group can react with isocyanate. Epoxy resin is directly added to the hydroxyl group of polyurethane adhesive as a polyol, and only the hydroxyl group participates in the reaction using this method, and the epoxy group fails to react.
The carboxyl group of the acid resin is used to open the epoxy ring, and then react with the isocyanate in the polyurethane adhesive. Epoxy resin can also be dissolved in ethyl acetate, phosphoric acid heating reaction is added, and its adduct is added to the polyurethane adhesive, which can improve heat resistance and hydrolytic stability. <>
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Anonymous users2024-02-03Preparation materials: epoxy AB glue, pigments, abrasives, toothpicks.
1. Pour an appropriate amount of A glue into the container.
2. Pour one-third of B glue into the container.
3. Stir the two kinds of glue with a toothpick, there will be turbidity at the beginning, and it will become clear and transparent after stirring thoroughly.
4. Pour the stirred glue into the container, and choose the container according to your preference.
5. Add your favorite pigment and stir well with a toothpick.
6. After standing for one day, demoulding is carried out.
7. The production process of epoxy resin handicrafts is completed.
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Anonymous users2024-02-02Polycondensation of epichlorohydrin with bisphenol A or polyols.
The classification of epoxy resin has not yet been unified, generally according to the strength, heat resistance grade and characteristics of classification, the main varieties of epoxy resin have 16 kinds, including general glue, structural glue, high temperature resistant glue, low temperature resistant glue, water and wet surface glue, conductive glue, optical glue, spot welding glue, epoxy resin adhesive film, styrofoam glue, strain glue, soft material adhesive, sealant, special glue, latent curing glue, civil construction glue 16 kinds.
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Anonymous users2024-02-01Epoxy resins can be used in coatings, adhesives, electronic appliances.
Epoxy resin is a general term for a class of polymers that contain more than two epoxy groups in the molecule. It is a polycondensation product of epichlorohydrin with bisphenol A or polyols.
Due to the chemical activity of the epoxy group, it can be used to open the ring with a variety of compounds containing active hydrogen, solidify and cross-link to form a network structure, so it is a thermosetting resin.
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Anonymous users2024-01-31It can be made into coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials, and has been widely used in various fields of the national economy.
In addition to the poor adhesion to non-polar plastics such as polyolefins, epoxy resin is also suitable for various metal materials such as aluminum, steel, iron, and copper; Non-metallic materials such as glass, wood, concrete, etc.; As well as thermosetting plastics such as phenolic, amino, unsaturated polyester, etc., all have excellent adhesive properties, so they are known as all-purpose glue. Epoxy adhesives are an important variety of structural adhesives.
Due to many unique advantages such as high insulation performance, high structural strength and good sealing performance, epoxy resin has been widely used in the insulation and packaging of high and low voltage electrical appliances, motors and electronic components, and has developed rapidly. It is mainly used for: 1. Pouring of insulating packages for electrical appliances and motors.
Such as electromagnets, contactor coils, transformers, dry-type transformers and other high and low voltage electrical appliances of the overall hermetic fully sealed insulated packaging manufacturing. It has developed rapidly in the electrical industry. Pouring from atmospheric pressure and vacuum.
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Anonymous users2024-01-30Epoxy resin is mainly used for bonding and anti-corrosion, and can bond various metal and non-metal materials; In addition, it has a strong corrosion resistance function, which can be used for the corrosion protection of atmosphere, acids, alkalis and most chemical products.
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Anonymous users2024-01-29Mainly used in the adhesive and coating industries
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Anonymous users2024-01-28Epoxy resin you don't know the use, open it up and take a look, so you get new skills in a minute.
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Anonymous users2024-01-27Can epoxy resin glue washing machine (brush plate paste in the rolling hole) work?
Ratio: a:b = 3:1 (weight ratio).
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