TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Lenz, Simon
A1  - Kohlmayr, Martin
A1  - Zuckerstätter, Gerhard
A1  - Kandelbauer, Andreas
ED  - Petutschnigg, Alexander
ED  - Barbu, Marius
ED  - Tudor, Eugenia
T1  - On the suitability of natural polyols as resin components for paper-based laminates
T2  - Processing Technologies for the Forest and Biobased Products Industries : Proceedings
N2  - Three different polyols (soluble starch, sucrose, and glycerol) were tested for their potential in the chemical modification of melamine formaldehyde (MF) resins for paper impregnation. MF impregnated papers are widely used as finishing materials for engineered wood. These polyols were selected because the presence of multiple hydroxy groups in the molecules was suspected to facilitate cocondensation with the main MF framework. This should lead to good resin performance. Moreover, they are readily produced from natural feedstock. They are available in large quantities and may serve as economically feasible, environmentally harmless alternative co-monomers suitable to substitute a portion of fossil-based starting material. In the presented work, a number of model resins were synthesized and tested for covalent incorporation of the natural polyol into the MF Framework. Spectroscopic evidence of chemical incorporation of glycerol was found by applying by 1H, 13C, 1H/13C HSQC, 1H/13C HMBC, and 1H DOSY methods. It was furthermore found that covalent incorporation of glycerol in the network took place when glycerol was added at different stages during synthesis. Further, all resins were used to prepare decorative laminates and the performance of the novel resins as surface finishing was evaluated using standard technological tests. The technological performance of the various modified thermosetting resins was assessed by determining flow viscosity, molar mass distribution, the storage stability, and in a second step laminating impregnated paper to particle boards and testing the resulting surfaces according to standardized quality tests. In most cases, the average board surface properties were of acceptable quality. Our findings demonstrate the possibility to replace several percent of the petrol-based product melamine by compounds obtained from renewable resources.
Y1  - 2014
SP  - 326
EP  - 331
S1  - 6
ER  -