Melamine formaldehyde microparticles

The possibility to fabricate the capsules formed on the surface of weakly cross-linked melamine formaldehyde microparticles of 5.13 iim in diameter has been shown. Poly(allylamine hydrochloride) (PAH) and poly(styrenesulfonate sodium salt) (PSS) were used as carrier matrix to form the shells. First, the formation... 

The question whether the intramolecularly crosslinked microparticles of non-aqueous polymer dispersions are really microgels is also justified, considering non-aqueous dispersions prepared from acrylic copolymers and melamine/formaldehyde crosslinker with particle sizes of about 300 nm. [45, 343]. In any case, these crosslinked polymeric microparticles are useful constituents of high-solids coatings, imparting a yield stress to those solutions which probably involves attractive forces between the microparticles. 

The size of obtained microcapsules is defined by the one of colloid microparticles (cores) and can be in an interval from several tens nanometers up to tens micrometers. A wide variety of colloid microparticles of organic and inorganic nature can be used as soluble cores for reception of microcapsules. There are microparticles based on melamine formaldehyde polymers and polystyrene latex, crystals of organic dyes, particles based on inorganic compounds such as metal carbonates Si02, protein aggregates, cellular constructions. ... 

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