Claims
- 1. A synergistic wood preservative composition comprising quaternary ammonium compound and 3-iodo-2propynyl butyl carbamate and having the property of providing stain resistance to wood.
- 2. The composition of claim 1, including said quaternary ammonium compound being selected from the group consisting of didecyldimethyl ammonium chloride, tri-methyl-coco-ammonium chloride and dimethyl-di-coco-ammonium chloride.
- 3. The composition of claim 2, wherein a water solution of said quaternary ammonium compound is present with an organic solvent solution of 3-iodo-2-propynyl butyl carbamate to create an emulsion.
- 4. The composition of claim 2, wherein the composition contains from about 4-20 parts per weight of said quaternary ammonium compound per 1 part per weight of 3-iodo-2-propynyl butyl carbamate.
- 5. The composition of claim 2, wherein said quaternary ammonium compound is didecyldimethyl ammonium chloride.
- 6. The composition of claim 2, wherein said quaternary ammonium compound is tri-methyl-coco-ammonium chloride.
- 7. The composition of claim 2, wherein said quaternary ammonium compound is dimethyl-di-coco-ammonium chloride.
- 8. The composition of claim 1, wherein the composition contains from about 1-80 parts per weight of said quaternary ammonium compound per about 1-10 parts per weight of 3-iodo-2-propynyl butyl carbamate.
BACKGROUND OF THE INVENTION
This application is a Continuation-In-Part of Ser. No. 07/286,971 filed Dec. 20, 1988, now abandoned, which was a continuation of Ser. No. 06/890,015 filed Jul. 28, 1986, abandoned, which in turn was a continuation in part of Ser. No. 06/700,031 filed Feb. 11, 1985, now abandoned.
Wood is one of the best structural materials for the construction of buildings because of its strength, ease of processing, and relatively low cost. Wood, however, has one serious drawback in that it is susceptible to decay by wood destroying fungi and attacked by wood-worms, borers and termites. Wood is also cosmetically damaged by molds, mildews and stain fungi. To eliminate structural damage caused by fungi, wood-worms, borers and termites, wood is traditionally treated with preservatives such as CCA (copper-chromium-arsenic solutions), pentachlorophenol, creosote oil and the like by pressure impregnation. To eliminate cosmetic damage, wood is traditionally immersed in solutions containing salts of chlorinated phenols. In recent years there has been a demand for wood preservatives which do not discolor wood like CCA or creosote and do not contain chlorinated phenols because of suspected human safety problems.
Wood preservative compositions comprising didecyldimethyl ammonium chloride as the active ingredient are known to be effective against wood damaging fungi and termites. See generally, Chemical Abstracts, Vol. 87, No.87:103500p, Butcher et al. (1987). Wood preservative compositions comprising 3-iodo-2-propynyl butyl carbamate as the active ingredient are known to be effective against fungi that cause structural and cosmetic damage to wood. See generally, Chemical Abstracts, Vol. 92, No. 92:75897f, Singer (1980). This invention is directed to synergistic combinations of these two preservatives.
This invention relates to wood preservative compositions effective in treating fungi which cause stain, while providing effective protection against brown and white rot, mildew, soft rot and mold. More particularly, this invention relates to wood preservative compositions comprising a synergistic combination of didecyldimethyl ammonium chloride (alternatively referred to as DDAC) which has the structural formula: ##STR1## and 3-iodo-2-propynyl butyl carbamate (alternatively referred to as IPBC) which has the structural formula: ##STR2##
The invention also contemplates the use of tri-methyl-coco-ammonium chloride or dimethyl-di-cocoammonium chloride in lieu of DDAC.
The preservative compositions of the invention can be prepared as solutions or emulsions by conventional means using water or organic solvents or simply mixed together as DDAC.
A preferred form is to combine a water solution of DDAC with an organic solvent solution of IPBC to create an emulsion. DDAC acts as a surfactant to emulsify the IPBC solution. The resulting emulsion is diluted with water and can be applied to wood by conventional treating methods such as immersion, brush, spray or pressure.
The quantity and ratio of DDAC to IPBC will depend upon the specific application. Generally, however, the preservative composition will contain from about 1 to 80 parts by weight DDAC per about 1 to 10 parts by weight IPBC A preferred ratio of DDAC to IPBC is from 4:1 to 20:1 parts by weight, i.e., about 4 to 20 parts by weight DDAC to per parts by weight IPBC. The solvent will generally consist of from 90 to 99 percent by weight of the total wood preservative composition ready for use. Typical solvents include combinations of water, aromatic solvents, polar solvents and aliphatic solvents. It may be advantageous to supply the preservative composition in concentrated form with about 20 to 40 percent by weight solvent with the remaining solvent being added prior to use.
If desired, the wood preservative composition may incorporate other preservatives. Typical preservatives include pentachlorophenol, zinc naphthenate, copper naphthenate and the like.
The following examples will serve to illustrate the invention and preferred embodiments thereof All parts and percentages in said examples and elsewhere in the specification and claims are by weight unless otherwise indicated.
Foreign Referenced Citations (1)
| Number |
Date |
Country |
| 1462043 |
Jan 1977 |
GBX |
Non-Patent Literature Citations (4)
| Entry |
| Chemical Abstracts, vol. 87, No. 87:103500p--Butcher et al (1977). |
| Chemical Abstracts, vol. 92, No. 92:75897f--Singer (1980). |
| Chemical Abstracts; vol. 93 (1980); #180811s; Hulme et al. |
| Chemical Abstracts; vol. 82 (1975); #81688y; Bent et al. |
Continuations (1)
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Number |
Date |
Country |
| Parent |
890015 |
Jul 1986 |
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Continuation in Parts (2)
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Number |
Date |
Country |
| Parent |
286971 |
Dec 1988 |
|
| Parent |
700031 |
Feb 1985 |
|
Patent Grant
4950685
