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Diethylene Glycol 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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Diethylene Glycol Manufactor Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin detail pictures


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Good quality To start with,and Purchaser Supreme is our guideline to offer the top service to our customers.Presently, we've been seeking our best to be amongst the top exporters inside our industry to fulfill consumers extra need to have for Diethylene Glycol 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: Algeria, Barcelona, Kuala Lumpur, Our products are widely recognized and trusted by users and can meet continuously developing economic and social needs. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!
  • The goods we received and the sample sales staff display to us have the same quality, it is really a creditable manufacturer.
    5 Stars By Kristin from Portugal - 2018.10.01 14:14
    Product quality is good, quality assurance system is complete, every link can inquire and solve the problem timely!
    5 Stars By Bruno Cabrera from Peru - 2018.06.19 10:42
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