Hybridization of aqueous-based polyurethane with glycidyl methacrylate copolymer

Abstract

ABSTRACT:The carboxyl group containing aqueous-based polyurethane (PU) dispersions were prepared from isophorone diisocyanate, poly(propylene glycol)-1000, and 2,2-dimethylol propanic acid via a PU prepolymer process. The amino content of this amino-terminated aqueous-based PU system was determined by a styrene oxide titration method. Glycidyl methacrylate (GMA) copolymer emulsions were prepared by an emulsion polymerization of GMA and other alkyl acrylates. The curing behavior of the GMA copolymer was demonstrated by a model reaction of the GMA copolymer with ethylenediamine. In the same token, the reaction took place between the PU amino groups and the GMA copolymer epoxides at ambient temperature and resulted in the formation of a hybridized homogeneous copolymer. This hybridized copolymer also consisted of carboxylic acid on the PU fraction after drying. Carboxylic acids of the copolymer were exchanged with calcium ion and this ionic coordination resulted in a calcium ion-crosslinked copolymer. The physical and mechanical properties and the thermal behaviors of the hybridized copolymers were evaluated.

Micromorphology and phase behavior of cationic polyurethane segmented copolymer modified with hydroxysilane

“…For example, Stefano Fiori successfully schemed out a frontal polymerization method [11]; John Texter developed a micro-emulsion polymerization method [12]. And various WPU/acrylic hybrid dispersions had been studied and developed through different routes, such as seeded emulsion polymerization [13,14], forming interpenetrating polymer networks (IPN) or semi-IPNs [15][16][17], crosslinking [18], and graft copolymerization of PU onto acrylic polymer chains [19][20][21][22][23] and so on.…”

The effect of polyether functional polydimethylsiloxane on surface and thermal properties of waterborne polyurethane

“…Owing to the shortcomings of poor thermal properties and water resistance, a variety of modification methods are applied in order to further improve the comprehensive performance of WPU, such as increasing degree of crosslinking [5], epoxy resin and acrylic resin modification [6][7], etc.…”

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

“…Waterborne coatings have been widely investigated due to industrial demand according to intensifying environmental regulations [1][2][3]. Meanwhile, polyurethanes have been popularly employed as principal resin for conventional waterborne coatings for their prominent performance.…”