This result may give some indication of condensation reactions
of different wood components and improvement the colour stability of larch wood samples in the first 530 hours of the weathering test.
The reaction of benzaldehyde with malononitrile in water at room temperature without the use of a catalyst raises the following questions: can we apply this technique to other condensation reactions
of aldehydes and ketones with active methylene compounds?
This is due to the fact that the condensation reaction
in the sol-gel process is endothermic, so increasing temperature effectively causes more crosslinking reactions of hydroxyl groups.
Increase in NaHP concentration gave rise to an increase in the degree of methylolation which in turn increase the level of condensation reactions
, molecular weight and hence the viscosity build up (Park, et al.
On the other hand, the temperature selected must not be so high that a premature reaction occurs between the silane and the rubber (pre-scorch), the viscosity of the compound falls to such an extent that the dispersion is impaired and an intermolecular condensation reaction
of the silane (polysiloxane formation) leads to a deterioration of the hydrophobization.
The copolymer was prepared at 70[degrees]C temperature by condensation reaction
have been awarded a patent for a method of rendering a base material or a shaped item antifouling with an antifouling paint made from a curable composition comprised of an organopolysiloxane having functional groups capable of condensation reaction
at both molecular terminals, and a hydrophobic silica thermally treated together with the organopolysiloxane.
The results indicated that the polymerization reaction of HAP and condensation reaction
of Si-OH groups occurred under UV irradiation, which could lead to UV irradiation curing of the hybrid sol.
It was noted that formaldehyde emission decreased, even though the formaldehyde in the reaction system was increased, which implies a favorable condensation reaction
was attained as a result of formaldehyde adjustment.
A few examples of few condensation reaction
are given below which were tried in TFR system.
A test that will quantify the water formed during cure of a coating that forms by a condensation reaction
such as a phenolic film.
Aqueous silicone dispersion capable of being cross-linked into an adhesive elastomer using a condensation reaction
Unfortunately, the condensation reaction
between NE and MDA is quite facile.
Acid cured coatings (AC): These coatings are cured through a poly condensation reaction
eliminating water and formaldehyde (not environment friendly).
Different amounts of PheMMT and 6aaMMT were sonicated in formaldehyde solution and treated in presence of concentrated sulfuric acid with the aim of promoting the condensation reaction
between the carboxyl end group of both aminoacids and the--OH groups of the formaldehyde in aqueous solution.