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Our concentrate on should be to consolidate and enhance the quality and service of present products, meanwhile consistently produce new products to meet unique customers' demands for Polyolefin Resin , Butadiene , Cas 1634-04-4 , We are one of the largest 100% manufacturers in China. Many large trading companies import products from us, so we can give you the best price with the same quality if you are interested in us.
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.


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


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Our improvement depends on the superior equipment, excellent talents and continuously strengthened technology forces 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: Luxembourg, Namibia, Lithuania, They are sturdy modeling and promoting effectively all over the world. Never ever disappearing major functions within a quick time, it's a have to in your case of fantastic good quality. Guided by the principle of Prudence, Efficiency, Union and Innovation. the corporation. ake an excellent efforts to expand its international trade, raise its organization. rofit and raise its export scale. We've been confident that we've been going to have a bright prospect and to be distributed all over the world in the years to come.
  • As an international trading company, we have numerous partners, but about your company, I just want to say, you are really good, wide range, good quality, reasonable prices, warm and thoughtful service, advanced technology and equipment and workers have professional training, feedback and product update is timely, in short, this is a very pleasant cooperation, and we look forward to the next cooperation!
    5 Stars By Belle from luzern - 2017.09.29 11:19
    Speaking of this cooperation with the Chinese manufacturer, I just want to saywell dodne, we are very satisfied.
    5 Stars By olivier musset from Armenia - 2018.02.21 12:14
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