10/2016, Finished R&D Projects

Development of fast drying low-odor oil systems as well as novel curing agent for the cross-linking of epoxidized dragonhead (Lallemantia iberica) oils for wooden parquet floors

  • funding program: ZIM-KF (BMWi)
  • term:  01.10.2016 – 31.03.2018
  • project partner: LOBA GmbH & Co. KG

Initial position:

In principle, there are two possibilities for the surface treatment of wooden floors, which are regulated in DIN 18356 VOB part C. These are:

  • The oiling and waxing
  • Sealing with lacquers

The oiling of a floor represents the most original surface treatment of the wood. This is an impregnation of the wood floor and not sealing, since no layer formation takes place. Natural products based on linseed oil are used for this purpose. A disadvantage of these natural products is the relatively long drying time. In the case of high humidity, low temperature or poor ventilation, drying may take several days. Moreover, the unpleasant odor formation due to the emission of oxidative cleavage products during drying leads to further restrictions in the use of thsi natural product. As a solution, a vegetable oil with higher content of fatty acids with three double bonds, dragonhead oil, which dries much faster than the linseed oil,  was chosen. In addition, the dragonhead oil with up to 70% linolenic acid will be used as a base material for the development of isocyanate-free two-component varnish systems.

Aim:

The aim of the project is the development of novel one-component oil systems and of isocyanate-free two-component varnish systems for the treatment of parquet floorings based on dragonhead oil.

Results:

Numerous dragonhead crops from different growing areas in Germany were processed. The obtained dragonhead oils were purified according to the traditional chemical refining process and made available to the project partner for testing for their suitability as a one-component oil system for parquet floor oiling. Due to the very high linolenic acid content of the dragonhead oil, very good results with regard to film formation and drying times could be achieved. In addition, both single-component and two-component sealing systems based on chemically modified dragonhead oils have been developed. The crosslinking of epoxidized dragonhead oil with dicarboxylic acid anhydrides made it possible to produce coating systems. In addition, epoxidized dragonhead oils could be incorporated into very stable wood coatings by UV radiation using photoinitiators.

 

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