Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

Sincerity, Innovation, Rigorousness, and Efficiency may be the persistent conception of our organization to the long-term to build together with shoppers for mutual reciprocity and mutual advantage for Phthalic Anhydride , Acetic Acid , Chemical Manufacturer , We welcome new and old customers from all walks of life to contact us for future business relationships and achieve mutual success!
Toluene Diisocyanate Cas 26471-62-5 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.


Product detail pictures:

Toluene Diisocyanate Cas 26471-62-5 Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin detail pictures


Related Product Guide:

Our products and solutions are greatly recognized and trustworthy by customers and may fulfill constantly changing financial and social requires for Toluene Diisocyanate Cas 26471-62-5 Phenol Formaldehyde Resin CAS 9003-35-4 High Quality And Low Price – Chemwin , The product will supply to all over the world, such as: Cape Town, Canberra, Cannes, Our faith is to be honest first, so we just supply high quality products to our customers. Really hope that we can be business partners. We believe that we can establish long time business relationship with each other. You can contact us freely for more information and pricelist of our products ! You will be Unique with our hair products !!
  • In our cooperated wholesalers, this company has the best quality and reasonable price, they are our first choice.
    5 Stars By Delia Pesina from Palestine - 2017.05.02 18:28
    We have been looking for a professional and responsible supplier, and now we find it.
    5 Stars By Freda from Luxembourg - 2018.12.11 14:13
    Write your message here and send it to us