ADHESIVES, GLUES AND SEALANTS


Polycondensation - polycondensation reactions

What are polycondensation reactions?

Polycondensation reactions are those chemical reactions in which the polymer is originated by successive bonds between monomers, which emit condensed molecules during the bonding process.

Condensed molecules that are released to the environment, due to the polycondensation process depends on the nature of the monomers that will bond in order to made the polymer, for example, silicone-based adhesives of 2 components that are produced during the polycondensation reaction curing stage emitted alcohols to the environment, as the result of the condensed molecules produced during the polycondensation reaction.

Condensed molecules that arise during the polycondensation process are molecules with low molecular weight such as water, hydrogen chloride, alcohols, etc ..., which are in gaseous state, separating from the resulting polymer via evaporation.

polycondensation

Curing adhesives by polycondensation:

Silicones

Modified Silane Polymer

Polyamides

Polysulfide

Phenol resins

In general the rate of cure of the adhesive by polycondensation is less than other adhesives


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