Abstract

Copolymerized Urea Formaldehyde Based Binder and their Characterization

Zafar Iqbal1 Sumara Qasim2 and Noreen Rafi2

1Applied Chemistry Research Centre,
PCSIR Laboratories Complex, Lahore,
Pakistan 2Department of Chemistry,
Faculty of Applied Chemistry,
University of Engineering & Technology,
Lahore, Pakistan

ABSTRACT

Modified urea formaldehyde (MUF) resin was prepared by the copolymerization of urea formaldehyde (UF) with polyvinyl acetate (PVAc) and butyl acrylate (BA) using various ratios i.e., 50:50, 60:40, 70:30 of (UF: PVAc) and 50:50, 60:40, 70:30 of (UF: BA). The physicochemical properties were determined by the standard methods. The comparison of the physical properties of the modified urea formaldehyde resin showed the improvement in viscosity, density and melting point at 70:30 ratio of (UF: PVAc). Copolymerized urea formaldehyde resin with polyvinyl acetate significantly reduced the formaldehyde emission at 70:30 (UF: PVAc) ratio as compared to similar ratio of butyl acrylate binder 70:30 (UF: BA). Findings indicate that MUF can be utilized as cheap binder for emulsion paint formulation due to its lower level of formaldehyde emission.

Keywords :Urea-formaldehyde, Polyvinyl acetate, Butyl acrylate, Copolymerization, Formaldehyde emission.