Study of influence of synthesis conditions on properties of melamine-urea formaldehyde resins

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Nádia Paiva (Author) FEUP; J. Pereira (Author) Other; João Ferra (Author) FEUP; P. Cruz (Author) Other; Luísa Carvalho (Author) FEUP; F. D. Magalhães (Author) FEUP

Journal

Title: International Wood Products Journal

Vol. 3 No. 1

Pages: 51-57

ISSN: 2042-6445

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge

Scopus - 23 Citations

INSPEC

Associated Projects

EO_Formaldehyde - Concepção de sistemas adesivos taylor-made para o fabrico de painéis de madeira de baixa emissão de formaldeído

Other information

Authenticus ID: P-008-499

DOI: 10.1179/2042645312y.0000000009

Abstract (EN): The aim of this work is to assess the differences in the polymeric structure and performance of melamine-urea formaldehyde (MUF) resins, when changing relevant synthesis variables: formaldehyde/amine groups [F/(NH 2) 2] molar ratio (both in the methylolation and the condensation steps) and the feedrate of urea during the condensation step. This synthesis process differs from the traditional alkaline acid process, since the F/(NH 2) 2 molar ratio is different for the methylolation and condensation steps. It was found that the F/(NH 2) 2 molar ratio and urea feedrate in the condensation step are the most influential variables on the product characteristics. A relationship was established between polymeric structure of the resin and the physicomechanical properties, as well as the levels of formaldehyde. A resin formulation was obtained that exhibits a formaldehyde content, evaluated both by perforator and desiccator methods, within the Japanese F**** requirements. This resin presents an overall performance better than the one obtained by two representative commercial resins. © 2012 IWSc.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8