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Synthesis and properties of oligohexamethyleneguanidine
palmitate…
Engineering Journal: Science and Innovation
# 12·2017 11
Synthesis and properties of oligohexamethyleneguanidine
palmitate for the modification
of organosoluble epoxy compounds
© I.N. Senchikhin
1
, A.V. Matveev
2
, E.S. Zhavoronok
2
,
O.Ya. Uryupina
1
, V.I. Roldughin
1
1
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS (IPCE RAS),
Moscow, 119071, Russia
2
Moscow Technological University (M.V. Lomonosov MIThT),
Moscow, 119571, Russia
The palmitates of oligohexamethylene guanidine have been synthesized and characterized.
We have established their more pronounced solubility in comparison with hydrochlorides
in epoxy oligomers, i.e. glycidyl ethers of diphenylolpropane Epikote 828 and oligo-
oxypropylene polyol Laproxide 703. As a result a chemical interaction occurs between the
starting materials and palmitate of oligohexamethyleneguanidine, leading to the formation
of adducts of epoxy oligomers with oligohexamethyleneguanidine, fully compatible with the
original oligomers. It is recommended to use oligohexamethylene guanidine for epoxy
compositions with aliphatic hardeners, for which strict requirements for high glass
transition temperature are not required. The temperature of the beginning of chemical
interaction of epoxy oligomers with salts of oligohexamethyleneguanidine and palmitic acid
is much higher than the reaction temperature of epoxy oligomers with aliphatic amine
hardeners. This allows the introduction of oligohexamethylene guanidine into epoxyamine
compositions by first separately preparing adducts with epoxy oligomers that can be used
as a modifying biocide additive for conventional formulations (corrected for the
stoichiometric content of the hardener).
Keywords:
epoxy resin, diamine, oligohexamethyleneguanidine, palmitate, solubility,
curing, bactericidal coatings, mechanical engineering
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