Furan resins are thermosetting resins that cross-link and cure with each other when heated without the addition of curing agents.
Release time:
2024-06-20
Furan resins are thermosetting resins that cross-link with each other when heated and cure without the addition of a hardener. Acids play a catalytic role in the curing reaction and also reduce the temperature required for heat curing. Depending on the special needs of the construction process, catalytic curing agents can be introduced, which allow rapid cross-linking and curing at room temperature without heat. Curing crosslinking to release low molecular substances, so the volume shrinkage during curing is large, its elongation is very low, showing brittle.
Due to the curing product molecular chain link is basically hypomethyl (-CH2 a) and saturated C a C bond, there is no active functional groups, so the furan resin does not participate in the chemical reaction of the corrosive medium. The cured furan resin has outstanding alkali resistance, solvent resistance and resistance to alternating acid and alkali media, and has good corrosion resistance to inorganic acids. Furan resin also has good heat resistance, generally can be used for a long time at 120 ℃ ~ 140 ℃, in some cases can be used at 180 ℃ ~ 190 ℃. However, due to the furan ring contains a double bond, and the heterocyclic ring has a tendency to open the ring under certain conditions. Therefore, furan resins are not good at resisting oxidation and will be destroyed in oxidising nitric and concentrated sulphuric acids.
Furan resin is well miscible with many plasticisers, thermosetting resins and thermoplastic resins, so that a variety of products with different properties can be obtained.
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Furan resins are thermosetting resins that cross-link with each other when heated and cure without the addition of a hardener. Acids play a catalytic role in the curing reaction and also reduce the temperature required for heat curing.
One of the main uses of phenolic resins is the production of compression moulding powder for moulded products. Using roller pressing method, screw extrusion method and emulsion method to make the resin impregnated with fillers and other additives mixed evenly, and then crushed and sifted can be made to pressure moulding powder.
The solid phenolic resin is a yellow, transparent, amorphous mass.
Solid phenolic resin is yellow, transparent, amorphous lumpy substance, slightly reddish due to free phenol, the specific gravity of the entity is about 1.7 on average, easily soluble in alcohol, insoluble in water, stable to water, weak acid, weak alkali solution.
New phenolic resin can be used as a bonding agent for diamond grinding wheels
New phenolic resin can be used as a bonding agent for diamond grinding wheels, the use of new phenolic resin and phenolic resin mixed with 1:3, not only improves the strength of phenolic resin, but also improves the heat resistance and grinding ratio. If the new phenolic resin is used alone,
New phenolic resins are polymer compounds
New Phenolic Resin is a polymer compound, which is produced by the condensation reaction between phenol and aryl ether. New phenolic resin has good mechanical properties, heat resistance, widely used in diamond products
Furan Resin Properties and Applications
Properties and applications of furan resins--Uncured furan resins have good mixing properties with many thermoplastic and thermosetting resins, so they can be modified by mixing with epoxy resins or phenolic resins.
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