The methylol urea compounds referred to earlier are truly, if only slightly water soluble, that is to say, the more solvent (water) that is added, the greater the weight of solute dissolved. On the other hand, the resinous liquids used as adhesives are not true solutions but colloidal dispersion, and although it is possible to produce dispersion that are infinitely compatible with water, the reaction products used as adhesives are not generally of this type.
The extreme case of a resin having infinite compatibility with water at all temperatures is an indication that the resin having infinite compatibility with a high ratio of formaldehyde (and probably smells strongly of it), or that it has been relatively under reacted. Formaldehyde also have common name as formalin, this substance is very smell and can irritate our respiratory system. The smell of formalin still hard even have convert into urea formaldehyde resin.
More about Water Toleration for UF
Popular Posts
-
Urea formaldehyde as wood glue have characteristics such as low cost for hude application, low cure temperature, resistance to microorgani... -
There are hundreds of adhesive preparations on the market today, supplemented by hundreds of available formulations, which are capable of h...
-
Synthetic rubber , first manufactured in substantial amounts during world war II, was not a replica of natural rubber, but rather, was synth...
-
What is resorcinol adhesives ? Resorcinol alone as the phenolic substance, and with other resin like formaldehyde this substance can unite t...
-
Filler is mixed with adhesive with many purpose like to make an adhesive stronger or make an adhesive more durable. Filler is a substance to...
No comments:
Post a Comment