SU1668140A1 - Composition for protecting wood - Google Patents

Abstract

This invention relates to the field of protecting interior and exterior wood parts from wood-staining microorganisms and can be used in wood housing. The purpose of the invention is to protect the wood from wood-coloring fungi while reducing the antiseptic content. The composition contains two antiseptics: 0.8 - 1.2% by volume bis - (N - aminodisalicyl) zinc borate and 0.3 - 0.5% by volume polytributyltin-acrylate, as well as 30 - 50% by volume of alkyd varnish, 3 - 4 vol.% Desiccant, organic solvent else. 2 tab.

Description

(21) 4117383/63

(22) 09/15/86

(46) 07.08.91. Bul Number 29

(71) Institute of Wood Chemistry, Academy of Sciences of Latvia

(72) A. E. Kreitus, O. Minin, I. L. Eremeeva, and G. Ya. Korotky (53) 6329531: 546.811: 674 (088.8)

(56) Schwartz, E.M. and Mardanenko, V.K. Synthesis and properties of bnc-p aminodisalicylates of metals of the II group of the periodic system. - Inorganic Chemistry, 1980, vol. 25, No. 9, p. 2374-2379.

Eremeeva, I. L, et al. Laboratory evaluation of wood protection with some polymeric organotin preparations and compositions based on them. - Theoretical aspects of wood modification Riga, Zinante, 1983, p. 134-135.

(54) COMPOSITION FOR WOOD PROTECTION

(57) The invention relates to the field of the protection of internal and external wooden parts from wood-staining microorganisms and can be used in wooden housing construction. The purpose of the invention is to protect the wood from wood-coloring fungi while reducing the antiseptic content. The composition contains two antiseptics: 0.8-1.2% by volume of bis- (p-aminodisalicyc. H) zinc borate and 0.3-0.5% by volume. % of polycrystalline acrylate, as well as 30–50 vol. % alkyd varnish, 3-4 vol. % desiccant, organic solvent the rest 2 table.

(L

This invention relates to the field of protecting interior and exterior wood parts from wood-staining microorganisms and can be used in wood housing.

The purpose of the invention is to protect the wood from wood-coloring fungi while reducing the antiseptic content.

Example 1. Preparing antiseptic solutions in a solvent mixture (xylene-white spirit at a ratio of 1: 1) .- 8 g of bis- (- aminodisalicyl) zinc borate (DSBC) in 500 ml and 4 g of poly-butyl tin acrylate (PTBOA) in 100 ml . 300 ml of alkyd varnish are placed in a mixer with a mechanical stirrer, the prepared antiseptic solutions are added and mixed for 20 minutes. If necessary, the composition can enter 30-60 g of pigment paste. Then add

30 M.I siccative, add a mixture of solvents up to 1 l and the mixture is stirred 15--20 U.IN. The resulting composition is applied to the surface of wood with a brush or dipping.

Similarly prepared the composition of the No. 2 and No. 3, as well as the composition No. 4, not containing DSBC, and the composition No. 5, not containing PTBOA.

The obtained compositions were treated with standard pine wood samples of size 10X10X6 mm (the latter — across the fibers) and subjected to a 30-day aging in contact with the pure standard culture of the wood-coloring fungus Cladosporium herbarum. After 30 days, the number of unaffected wood samples (out of 100 prototypes) was determined. Protecting O5

ace

The capacity of the compositions was evaluated by the likelihood of protection, expressed as a percentage of the total number of samples tested. The results of bio-tests are given in table 1 and indicate a high efficiency of the new composition

The results of tests of compounds N and X "5 showed that with the separate application of each and antiseptics, their high concentration is required to ensure complete protection of wood from wood fungi

Thus, the concentration of DSBTs should be 2.2 vol% (in the composition of the report 0.8 1.2 vol%), and the concentration of PTBOA should be 2.6 vol% (in the composition of 0.3-0.5 vol %) The total concentration of antiseptics in the claimed composition is 1.1 1.7% vol. Significantly lower than the concentration of individual antiseptics in the same composition, which is necessary to achieve the same result.

Example 2 Prepared variants of the composition, the content of antiseptics in which corresponds to the claimed or goes beyond the limits

The results of bioassays are given in gabl 2. Test method for irimer 1

The data given in Table 2 is a witness that the maximum is exceeded.

1300,80,4

2501,00,5

3401,20,3

430-2,6

5302.2

6 Control - wood without processing

but the permissible concentration of antiseptic PTBOA (No. 6, No. 8) or antiseptic TSBTS (No. 11, No. 12) is impractical because it only leads to their excessive consumption, not affecting the result (full protection of wood is achieved within the limits) Reduced concentration of PTBOA (No. 5, No. 7) or DSBTs (No. 9, No. 10) below the lower stated limit significantly reduces the effectiveness of the composition

0

five

Claims (1)

Invention Formula A wood preservative composition containing antiseptic in the form of a polytributyltin acrylag, an adkyd varnish, a desiccant and an organic solvent, characterized in that, in order to protect the wood from wood-dyed fungi while reducing the antiseptic content, it additionally contains bis as an antiseptic (n- aminodisalicide) zinc borate in the following ratio of components, vol% Bsh -frt-aminodisalicyl) zinc borate0.8 - 1.2 Poly i ributyltin acrylate0.3-0.5 Adidine varnish 30 50 Desiccant 3.0-4.0 C) p1aanical solvent Remaining Tablipa 1 Rest table 2