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Cas 107-98-2 Manufactor Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin Detail:

Product Namephenolic resin

Molecular format:

CAS No:9003-35-4

Product molecular structure

phenolic resin

Chemical Properties

Phenol-formaldehyde resin is prepared as follows:
C6H5OH+H2C=O —> [-C6H2(OH)CH2-]n
One-Stage Resins. The ratio of formaldehyde to phenol is high enough to allow the thermosetting process to take place without the addition of other sources of cross-links.
Two-Stage Resins. The ratio of formaldehyde to phenol is low enough to prevent the thermosetting reaction from occurring during manufacture of the resin. At this point the resin is termed novolac resin. Subsequently, hexamethylenetetramine is incorporated into the material to act as a source of chemical cross-links during the molding operation (and conversion to the thermoset or cured state).

 

Application:

Phenolic resins are used for low-cost partsrequiring good electrical insulating properties,heat resistance, or chemical resistance. Theaverage shelf life of this resin is about 1 monthat 21.1°C. This can be extended by storing it ina refrigerator at 1.6 to 10°C. Varying the catalyst(according to the thickness of the cast) andraising the cure temperature to 93°C will alterthe cure time from as long as 8 h to as short as15 min.
Some shrinkage occurs in the finished casting(0.012 to 0.6 mm/mm), depending on thequantity of filler, amount of catalyst, and therate of cure. Faster cure cycles produce a higherrate of shrinkage. Since the cure cycle can beaccelerated, phenolics are used in short-runcasting operations.
Cast phenolic parts are easily removed fromthe mold if the parting agents recommended bythe supplier are used. Posteuring improves thebasic properties of the finished casting.


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Based on domestic market and expand overseas business is our improvement strategy for Cas 107-98-2 Manufactor Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin , The product will supply to all over the world, such as: Amsterdam, Leicester, Madras, We've got won a good reputation among overseas and domestic clients. Adhering to the management tenet of credit oriented, customer first, high efficiency and mature services, we warmly welcome friends from all walks of life to cooperate with us.
  • Although we are a small company, we are also respected. Reliable quality, sincere service and good credit, we are honored to be able to work with you!
    5 Stars By Norma from Auckland - 2018.12.10 19:03
    Product quality is good, quality assurance system is complete, every link can inquire and solve the problem timely!
    5 Stars By Georgia from The Swiss - 2017.03.08 14:45
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