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We strive for excellence, service the customers, hopes to become the best cooperation team and dominator enterprise for personnel, suppliers and customers, realizes value share and continuous promotion for Epichlorohydrin Distributors , Cas 1634-04-4 , Neopentyl Glycol(Npg) , Striving hard to attain continual success determined by high quality, reliability, integrity, and complete understanding of current market dynamics.
Cas 101-68-8 Supply 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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Cas 101-68-8 Supply Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin detail pictures


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We take customer-friendly, quality-oriented, integrative, innovative as objectives. Truth and honesty is our management ideal for Cas 101-68-8 Supply Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin , The product will supply to all over the world, such as: Durban, Algeria, Norway, Selling our products and solutions causes no risks and brings high returns to your company instead. It is our consistent pursuit to create value for clients. Our company is looking for agents sincerely. What are you waiting for? Come and join us. Now or never.
  • It is not easy to find such a professional and responsible provider in today's time. Hope that we can maintain long-term cooperation.
    5 Stars By Kristin from Bahrain - 2018.07.27 12:26
    The customer service staff's answer is very meticulous, the most important is that the product quality is very good, and packaged carefully, shipped quickly!
    5 Stars By Meroy from Canada - 2017.02.28 14:19
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