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Synthetic Resin And Plastics
Phenolic epoxy resin
Epoxy resins are widely used as adhesives, anti-corrosion materials, insulating coatings, laminates, casting and dipping materials, and molding materials. It can also be used as glass fiber reinforced plastics, electrical precision parts, shock-proof and sound-absorbing materials, and textile finishing agents. In terms of coatings, it is mainly used as a metal protective coating for protective coatings for ships, steel components, metal containers, etc.; in addition, as a vehicle for cationic electrophoretic coatings, it is widely used as a primer for car bodies; widely used as a Chemicalbook in electrical appliances. Insulating paint, injection molding materials, molding materials, especially in the electronics industry, are widely used as sealing materials for LSI, IC, etc. in addition to laminates; in civil construction, they are used as non-slip dressings, floor materials, and mortar materials for concrete casting roads; As an adhesive, it is widely used in the bonding of metal and non-metal materials (such as ceramics, glass, wood, etc.) with good adhesion; also used as a stabilizer for resins and polyvinyl chloride; textile treatment agent, can Prevent wrinkles and scale reduction.
Generally speaking, the preparation method of epoxy resin can be summarized into two methods, one of which is to use compounds containing active hydrogen, such as compounds containing hydroxyl, carboxylic acid groups, amino groups, etc., as raw materials, under the catalysis of alkali, and Epoxy compounds (such as epichlorohydrin) are reacted and epoxy groups are introduced, such as the preparation of bisphenol A epoxy propyl ether epoxy resins. Compounds such as tetrahydrophthalic acid, cyclohexene, etc. are used as raw materials, and then peroxides are used to epoxidize the ethylenic bonds to form epoxy groups. For example, epoxy resins made by reacting with compounds containing ethylenic bonds are all This type. The synthesis of bisphenol A type epoxy resin varies with the relative molecular mass. The liquid epoxy resin with low molecular weight makes bisphenol A react with excess epichlorohydrin Chemicalbook alkane under the action of potassium hydroxide (sodium) to epoxidize it. In order to inhibit the formation of high molecular weight compounds and the hydrolysis of epichlorohydrin, lye should be added slowly. For epoxy resins with medium molecular weight, a one-step method is used. That is, bisphenol A (or other basic substance) is dissolved in sodium hydroxide, and then epichlorohydrin is gradually added to react. This method can save the amount of epichlorohydrin. For high molecular weight epoxy resins, there are two methods: one is the one-step method. Dissolve bisphenol A in sodium hydroxide, then add epichlorohydrin, and then add a part of sodium hydroxide, and finally dehydration and refining; the second is a two-step method, in which the epoxy resin is prepared and added Bisphenol A is allowed to react further to increase the relative molecular weight. This is because the epoxy resin has epoxy groups at both ends, which can react with Bisphenol A under certain conditions.
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* Sample testing support.
* Every batch of products will be tested to ensureits quality.
*The packing also can be according the customers` requirment.
*Any inquiries will be replied within 24 hours.
*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
*The fact of logistics information monitoring.
* Any questions about the product can be consulted at any time.
*Product has any problem can return.
Do you accept sample order?
We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
What’s your MOQ?
Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Do you supply product report?
Yes. We’ll give you product analysis report before shipping.
Is there a discount?
Different quantity has different discount.
1. ≤50kg, Express delivery recommended, usually called as DDU service;
2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;
3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;
4. For high value products, please select air shipping and express delivery for safe.