TITLE:
Preparation and Properties of Two-Component and Double-Crosslinking Waterborne Polyurethane-Acrylic Dispersions
AUTHORS:
Nan Gao, Zhuo Zhang, Qingzhi Dong
KEYWORDS:
Waterborne Polyurethane-Acrylic Dispersions; Two-Component; Double-Crosslinking
JOURNAL NAME:
Open Journal of Organic Polymer Materials,
Vol.3 No.2,
April
29,
2013
ABSTRACT: In this paper, isophorone diisocyanate (IPDI),
polyethylene glycol (PEG), dimethylolpropionic acid (DMPA) and internal
crosslinking agent trimethylolpropane (TMP) were used to prepare waterborne
polyurethane. And then double-crosslinked polyurethane-acrylic composite
aqueous dispersion was prepared in which polyacrylate was adopted to modify
waterborne polyurethane and some special external crosslinking agents were
added including silicone and trifunctional aziridine. The influence of the
amounts of internal and external crosslinking agents, emulsifier, initiator on
the particle size, particle size distribution, viscosity, molecular weight, as well as
water adsorption ratio were studied.