Table 1 Percentage by weight of substances used for the preparation of the tannin-based wood preservatives
From: Tannin-caprolactam and Tannin-PEG formulations as outdoor wood preservatives: biological properties
Formulation | Tannin (%) | Boric acid (%) | Hexamine (%) | NaOH (%) | Additive (%) | Water (%) |
|---|---|---|---|---|---|---|
Pure boric acid | – | 0.43 | – | – | – | 99.57 |
Tannin-boron 10% | 9.73 | 0.49 | 0.58 | 0.49 | – | 88.72 |
Tannin-boron 20% | 19.12 | 0.96 | 1.15 | 0.96 | – | 77.82 |
Tannin-caprolactam-boron | 8.14 | 0.41 | 0.49 | 0.41 | 15.56 | 75.01 |
Tannin-PEG-boron | 9.72 | 0.49 | 0.58 | 0.49 | 19.41 | 69.34 |