DE4020484A1 - Liquid wood-protecting agent, with good penetration - contains isocyanate-modified linseed oil, siccative mixt., solvent, biocide and at least one dye - Google Patents

Abstract

Liq. wood-protecting compsn. (I) comprises isocyanate-modified linseed oil (L) and a siccative mixt. (M) contg. at least one dye, which make up the largest component of the dry substance, a solvent(s) (chiefly consisting of aliphatic, hydrocarbon-free liqs.) and a biocide (B). Pref. (M) is composed of Zr, Ca and Mn cpds. and a silicate to enhance viscosity. (B) is an N,N-diaryl-N'- aryl-N'-(trihalomethylthio) -sulphamide. (S) is a mixt. of ester alcohols and glycol ethers. USE/ADVANTAGE - (I) is applied as a component of a paint or glass. (I) penetrates the wood better than previous compsns., and protects the wood against water, cold and UV light. (I) is non-toxic to humans and pets. (I) is esp. useful against fungi and algae.

Description

The present invention relates to an impregnating agent for wood, which is coloring at the same time. It concerns furthermore a process for its production.

Impregnating agents for wood are already known. They serve to protect the wood from harmful environmental influences or extend its life. In particular, will a protection against the attack of mushrooms and rottenbak algae and animals like insects. The Impregnating agents are usually liquid systems that can also be hydrous.

An ideal wood preservative intended to sustainable toxicity against pests, but may be for humans and Pets should not be toxic. It should not be on metals grab, as easily as possible even in non-pretreated Wood penetrate, may not be washed off by rain, etc. be and should be as cheap as possible.

A major difficulty is the penetration of the agent in the wood dar. Therefore, one currently uses boiler pressure method in which the pre-dried wood in a ver closed, impregnant-containing container alternch selnd over- and suppression is suspended.

These methods are based on finished wooden objects and in particular on wood products in construction not or only very expensive reversible. The paint processes, which are also already known have the disadvantage that the wooden objects first with a  Primer impregnated, dried for a long time and then be provided with a different surface finish have to. In addition, that used to be effective in the past Carbolineum was used today because of toxicity can no longer be used.

The problem described above and the disadvantages of previous solutions in the field of wood preservation are treated in detail in the Römpp chemistry dictionary, z. B. 6th Ed. 1966, Vol. II, Sp. 2758-2762.

The object of the invention was the creation of a particular fungicidal and algicidally effective anhydrous Holzim impregnating agent applied in the paint who that can better enter the wood than known remedies penetrates, but at the same time acts as a surface finish, d. H. the application of a surface varnish, lac kes or painting makes unnecessary. In addition, that should Means the wood better against the action of water, Protect UV light, sunlight and cold and there be environmentally friendly, also what the manufacture be meets. Finally, the wood should be turned on as desired can be colored.

The wood impregnating agent according to the invention, which is the fulfills its tasks, is in independent claim 1 Are defined. Special designs form the counter dependent claims.

As further surprisingly found, is the order of addition of the components of the invention proper wood impregnating agent in the production  insofar as critical, as in a certain order the best results are achieved. Therefore, concerns The invention further relates to a process for the preparation of the wood impregnant used in the second unab pending claim is defined.

It should now be the individual components of the invention be properly identified according impregnating agent.

Main component ("body") of the solvent-free Phase of the agent is a chemically drying substance Linseed oil base, which is normally only for use Surface coatings is known. It is preferable is an isocyanate-modified linseed oil. Especially ge suitable is the product Uralac F 77, which is a 60% solution supplied in White spirit by the company DMS Resins.

For better curing of this product, although air is drying, but its curing also in the interior of the Wood should be going on, become the known Siccative metal naphthenates, octoates, linoleates, re sinate u. Like. added. Has proven particularly useful Mixture of manganese, calcium and ziconium compounds, the is new and a surprisingly good and fast drying causes. Well suited siccatives of this group, d. H. the Single metal derivatives were sold under the trade name Nuodex from URAI S.p.a., Assago, Italy be pulled.

As a solvent, the wood according to the invention contains impregnating agent - except the white spirit of the modi fied linseed oil - only oxygen-containing aliphatic Links. The chosen solvents seem for  the good penetration of the inventive agent in to be responsible for the wood. It has become a mixture from a lower glycol ether of boiling point between 100 and 150 ° C with an ester alcohol of boiling point 180 proven up to 260 ° C. Such glycol ethers are for. B. Dowanol PM the Dow Chemical Company (propylene glycol methyl ether) and Ethylene glycol methyl ether and ethylene glycol ethyl ether. Ester alcohols are z. Butyl diglycol ether ("butylcarbitol"), Glycol monoformate and acetate. The product has proven itself TEXANOL from Eastman Chemical Corp.

As a biocidal substance Holzim the invention contains impregnating agent prefers a sulfamide derivative which is resistant to Fungi, algae, Penicilliumarten is effective, light stable and non-volatile and the drying of the linseed oil derivative does not bother. Preference is given to using an N, N-diaryl N'-aryl-N '(trihalogenomethylthio) -sulfamide. As a dye It is best to use those of the Sicoflush-Gamme (BASF).

The wood impregnating agent according to the invention contains in the rule, but not necessarily a leveling agent, z. B. Aldoxime or Ketoxime. Suitable oximes are z. Butyral doxime, methyl ethyl ketoxime and cyclohexanone oxime. Further ge suitable additives are rheological additives such. B. organic modified phyllosilicates ("Bentone SD-1" of the Kronos Titan GmbH, Leverkusen, Germany) as well as other usual addition substances such as wetting and dispersing agents, flavorings, etc.

The composition of particularly suitable Holzimprägnier Medium is the following, in parts by weight:  

Isocyanate-modified linseed oil (60% in White Spirit) 25 to 35 Desiccant mixture (in each case based on the metal): 0.04 to 0.1 biocide: 0.5 to 1 Solvents, ethers and ester alcohols 45 to 60 of which 1 to 5 parts glycol ethers, balance ester alcohols @ In addition, if desired, @ Skinning agents 0.3 to 0.8 rheology 4 to 8 dyes 1 to 10

To carry out the method according to the invention you submit first the solvent in a stirred vessel before, leaves The solution of modified linseed oil runs and gives the Siccative and the biocide too. Of the optional addition Substances are the skin preventers just after the Sikka tives and the rheology additive and the dyes on Finally added. Of course, the Her constantly stirred. It's best to work with nor painter room temperature; an approach of about 100 kg is in about 20 to 30 minutes completed.

The impregnating agent is still characterized by increased Shelf life, generally about 8 to 12 months.

For application brush or spray the mechanical cleaned wooden surface with the liquid medium leaves z. For example, dry for 24 hours and coat the surface with one second coat of the same product. Only very rarely is one third coat required. The wood is now conserved  Four impregnated and also has a colored te surface, z. B. walnut, larch, mahogany, etc., without that another other painting such as stain, etc. needed would.

The examples are intended to further illustrate the invention.

Example 1

In a stirred tank provided with a vent to the outside with a useful capacity of approx. 150 l, you get 3 kg Dowanol PM (Propylene glycol methyl ether bp. 120 °) and 52.3 kg TEXANOL (Ester alcohol, bp. 244 ° C). While stirring, add gradually following products: 30 kg URALAC F-77 (60% in white spirit), 0.2 kg manganese sorbant (6% Mn), 0.6 kg of calcium sorbate (4% Ca), 0.2 kg of zirconium siccative (12% Zr), 0.5 kg Exkin 2 (methyl ethyl ketoxime), 0.6 kg biocide, 5 kg bentone paste, 2.4 kg Sicoflush L Red 2817, 1.2 kg Sicoflush L Yellow 1916 and 4 kg Sicoflush L Black 0054.

After stirring for 30 minutes, an impregnating agent is obtained, the wood stains walnut-colored.

example 2

In Example 1, the three dyes are replaced by a mixture from 1.3 kg Sicoflush red, 2 kg Sicoflush yellow and 0.6 kg Sicoflush black replaced.

An impregnating agent is obtained, the wood is dyed of larch wood gives.  

example 3

In Example 1, the three specified dyes through a mixture of 4 kg Sicoflush red and 2 kg Sicoflush black replaced.

An impregnating agent is obtained, the wood is dyed of mahogany.

As already mentioned, is another surface treatment of the impregnated wood is unnecessary, however, if desired, be made. The described Impregnation subsequently interferes with different or the same color Paints or coatings not.

Claims (9)

1. Impregnating agent in liquid form for wood, containing solvent and biocide, characterized in that it contains as a main component of the dry matter isocyanate natmodifiziertes linseed oil and next to a siccative mixture and at least one dye, and that the solvent consists mainly of aliphatic, hydrocarbon-free liquids. 2. Impregnating agent according to claim 1, characterized gekenn draws that as Sikkativgemisch such from Man gan-, calcium and zirconium compounds present. 3. Impregnating agent according to claim 1 or 2, characterized characterized in that it continues to be a skin-preventive contains oxime-based agent. 4. Impregnating agent according to one of the preceding An claims, characterized in that it further comprises Silicate-based rheology additive. 5. Impregnating agent according to one of the preceding An claims, characterized in that it as a biocide N, N-diaryl-N'-aryl-N '- (trihalogenomethylthio) -sulfamide contains.   6. Impregnating agent according to one of the preceding An claims, characterized in that the solvent is a mixture of ester alcohols and glycol ethers. 7. Impregnating agent according to claim 6, characterized gekenn indicates that the main constituent of the mixture is a Gly koimonoester and as a minor constituent a glycol monoether is present. 8. Impregnating agent according to claim 1 to 8, characterized in that it is zusanmengesetzt by weight

• a) 25 to 35 parts of isocyanate-modified linseed oil, about 60% in white spirit,
• b) from 0.04 to 0.1 part of desiccant mixture, calculated as metal,
• c) 0.5 to 1 part of biocide,
• d) 0.3 to 0.8 part of skin preventive,
• e) 4 to 8 parts of rheology additive,
• f) 1 to 10 parts of dye or dyes and
• g) 45 to 60 parts of solvent.

9. Process for the preparation of the impregnating agent according to claim 8, characterized in that under Rüh to the submitted component g) successively and in the in claim 8 given sequence a) to f) added and dissolved before adding a new component or dispersed.