CA1272558A - Wood preservatives - Google Patents
Wood preservativesInfo
- Publication number
- CA1272558A CA1272558A CA000506061A CA506061A CA1272558A CA 1272558 A CA1272558 A CA 1272558A CA 000506061 A CA000506061 A CA 000506061A CA 506061 A CA506061 A CA 506061A CA 1272558 A CA1272558 A CA 1272558A
- Authority
- CA
- Canada
- Prior art keywords
- iodo
- ammonium chloride
- butyl carbamate
- propynyl butyl
- per weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Agricultural Chemicals And Associated Chemicals (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A synergistic wood preservative composition is provided comprising didecyldimethyl ammonium chloride and 3-iodo-2-propynyl butyl carbamate.
A synergistic wood preservative composition is provided comprising didecyldimethyl ammonium chloride and 3-iodo-2-propynyl butyl carbamate.
Description
~7X55~3 1 Il lj WOOD PRESERVATIVES 84C32 !
Il Background of the Invention _ _ _ _ .
Wood is one of the best structural materials for the construction of l buildings because of its strength, ease of processing, and relatively low i cost. Wood, however, has one serious drawback in that it is susceptible to decay by wood destroying fungi and a-ttacked by wood-worms, borers and ter mites. Wood is also cosmetically damaged by molds, mildews and stain fungi.
! To eliminate structural dalnage caused by fungi, wood-worms, borers and termites, wood is traditionally treated with preservatives such as CCA
¦ (copper-chromium-arsenic solutions), pentachlorophenol, creosote oil dnd the like by pressure impregnation. To eliminate cosmetic darnage, wood is traditionally irlllnersed in solutions containing salts of chlorinated phenols.
In recent years there has been a demand for wood preservatives which do not I discolor wood like CCA or creosote and do not contain chlorinated phenols because of suspected hulnarl safety problems.
Wood preservative compositions comprising didecyldimethyl ammonium I¦ chloride~as the active ingredient are known to be effective against wood Il damaging fungi and termites. l~ood preservative compositions comprising il 3-iodo-2-propynyl butyl carbamate as the active ingredient are known to be effective against fungi that cduse structural and cosmetic damage to wood.
This invention is directed to syner~istic combinations of these two preser-vatives.
1!
'1¦Brief Description of the Invention This invention relates to wood preservative compositions effective in treating fungi causing rot, mildew, stain and mold. More particularly, this , . .1 ~r , I
~;~7;~5~8 .
11 .
invention relates to wood preservative cornpositions comprising a synergistic combination of didecyldimethyl ammonium chloride (alternatively referred to as DDMAC) which has the structural formuld:
r ~ 1 CH3~ ~ ~CH3 Cl-( ~H2)9 C~13 , 11 ¦¦ and 3-iodo-2-propynyl butyl carbamate (alternatively referred -to as IPBC) Il which has the structural formula:
' . j ; I I-c-c-cH2-o-c-NH-(cH2)3-cH3 , O
Detailed Description of the Invention l ~
I The preservative compositions of the invention can be prepared as , solutions or emulsions by conventional means using water or organic solvents.
¦ A preferred form is to combine a water solution of DDMAC with an organic solvent solution of IPBC to create an emulsion. DDMAC acts as a sur-,I face agent to emulsify the IPBC solution. The resulting emulsion is diluted ~I with water and can be applied to wood by conventional treating methods such as immersion, brush, spray or pressure.
The quantity and ratio of DDMAC to IPBC will depend upon the specific i application. Generally, however, the preservative composition will contain 'I from 1 to 80 parts by weight DDMAC per 1 to 10 parts by weight IPBC. A pre-¦ ferred ratio of DDMAC to IPBC is from 4:1 to 20:1 parts by weight. The sol-., ,~ - 2 -3 ~7~5~ !
I vent will generally consist of from 90 to 99 per cent by weight of the total I wood preservat1ve composition. Typical solvents include combinations of i water, aromatic solventsg polar solvents dnd aliphdtic solvents.
If des~red, the wood preservative composition may incorporate other il preservatives. Typ~cal preservatives include pentachlorophenol, zinc i¦ 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 other~ise indicated.
Ex ~
, Ten red pine samples (lû x 10 x 100 mm) were imlnersed in each preser-vative compos~tlon, listed in Table 1, for five minutes. DDMAC was obtained , from Lonza Inc. of FairLawn, New Jersey as a water solution under the trade il name Bardac,* IP~C was obtained from Iroy Chemical Corporation of Newark, NewJersey as a solvent solution under the trade name Troysan Polyphase AFl.* The j treated samples were mixed randomly and exposed in dishes to at least three species of wood damaging fungi. The fungi used were:
Molds White Rot Asper~illus ni~er Trametes versicolor l aeci!omyces varioti Trametes s~.
Trichoderlna vlrlde Pol,yporus sp ocladlum ~, il Bro Rot Soft Rot Gloeophylluln trabeum Acremonium strictum us l~ eus Chaetomiuln ~lobosum Foria placenta 7~a~hium rubrum ~i Serpula 1 cum2ns . ~ trademark !l ''i ,1 ,i ! i ~7~S5 . 11 .' Mlldew Stain Aureobasidium pullalaria Chlorociboria aeru~inascens l Hormiscium sp. Cerotocystis vescus Torula ~ Diplodia ~E~
iThe exposed samples were incubated for thirty days under conditions ; of 90% relative humidy and 32C temperature to promote fungal growth. After incubation the degree of fungal attack and decay to each sample W2S measured 'I in square millimeters. The measurements were converted to express the per-centage of wood surface area protected. The results are shown in Table 1.
The preservative effectiveness for each composition shown in Table 1 is an '¦ average of ten measurements.
As seen from the data presented in said table, the wood preservative compositions of the present invention exert an unexpectedly increased wood preservative effect. The use of combinations of DDMAC and IPBC are more effective than the use of either compound alone at the same concentration of preservat;ve.
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Example 2 Samples of pine wood (19 x 19 x 457 mm) were pressure treated with DDMAC alone, IPBC alone, and a mixture of DDMAC and IPBC. The samples were ,I evaluated according to a standard wood preservative field test (ASTM D1758-~¦ 74). To obtain substantially equal wood preservative performance, which wasmeasured after six months of exposure, the following concentrations of the respective preservatives were needed.
. ~ i.
Kilograms of Preservative per Cubic Meter of ~ood Required for Protection IPBC DDMAC DDMAC and IPBC
Molds, Stain 12.80 12.80 5.73 .67 Decay 6.40 12.80 5.73 .67 Termites 12.80 6.40 5.73 .67 As seen from the data presen,ted in Table 2, the use of DDMAC in admixture with IPBC is generally more effective at much lower concentrations than either compound used alone.
~ I ~
,1 ~ I
Il Background of the Invention _ _ _ _ .
Wood is one of the best structural materials for the construction of l buildings because of its strength, ease of processing, and relatively low i cost. Wood, however, has one serious drawback in that it is susceptible to decay by wood destroying fungi and a-ttacked by wood-worms, borers and ter mites. Wood is also cosmetically damaged by molds, mildews and stain fungi.
! To eliminate structural dalnage caused by fungi, wood-worms, borers and termites, wood is traditionally treated with preservatives such as CCA
¦ (copper-chromium-arsenic solutions), pentachlorophenol, creosote oil dnd the like by pressure impregnation. To eliminate cosmetic darnage, wood is traditionally irlllnersed in solutions containing salts of chlorinated phenols.
In recent years there has been a demand for wood preservatives which do not I discolor wood like CCA or creosote and do not contain chlorinated phenols because of suspected hulnarl safety problems.
Wood preservative compositions comprising didecyldimethyl ammonium I¦ chloride~as the active ingredient are known to be effective against wood Il damaging fungi and termites. l~ood preservative compositions comprising il 3-iodo-2-propynyl butyl carbamate as the active ingredient are known to be effective against fungi that cduse structural and cosmetic damage to wood.
This invention is directed to syner~istic combinations of these two preser-vatives.
1!
'1¦Brief Description of the Invention This invention relates to wood preservative compositions effective in treating fungi causing rot, mildew, stain and mold. More particularly, this , . .1 ~r , I
~;~7;~5~8 .
11 .
invention relates to wood preservative cornpositions comprising a synergistic combination of didecyldimethyl ammonium chloride (alternatively referred to as DDMAC) which has the structural formuld:
r ~ 1 CH3~ ~ ~CH3 Cl-( ~H2)9 C~13 , 11 ¦¦ and 3-iodo-2-propynyl butyl carbamate (alternatively referred -to as IPBC) Il which has the structural formula:
' . j ; I I-c-c-cH2-o-c-NH-(cH2)3-cH3 , O
Detailed Description of the Invention l ~
I The preservative compositions of the invention can be prepared as , solutions or emulsions by conventional means using water or organic solvents.
¦ A preferred form is to combine a water solution of DDMAC with an organic solvent solution of IPBC to create an emulsion. DDMAC acts as a sur-,I face agent to emulsify the IPBC solution. The resulting emulsion is diluted ~I with water and can be applied to wood by conventional treating methods such as immersion, brush, spray or pressure.
The quantity and ratio of DDMAC to IPBC will depend upon the specific i application. Generally, however, the preservative composition will contain 'I from 1 to 80 parts by weight DDMAC per 1 to 10 parts by weight IPBC. A pre-¦ ferred ratio of DDMAC to IPBC is from 4:1 to 20:1 parts by weight. The sol-., ,~ - 2 -3 ~7~5~ !
I vent will generally consist of from 90 to 99 per cent by weight of the total I wood preservat1ve composition. Typical solvents include combinations of i water, aromatic solventsg polar solvents dnd aliphdtic solvents.
If des~red, the wood preservative composition may incorporate other il preservatives. Typ~cal preservatives include pentachlorophenol, zinc i¦ 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 other~ise indicated.
Ex ~
, Ten red pine samples (lû x 10 x 100 mm) were imlnersed in each preser-vative compos~tlon, listed in Table 1, for five minutes. DDMAC was obtained , from Lonza Inc. of FairLawn, New Jersey as a water solution under the trade il name Bardac,* IP~C was obtained from Iroy Chemical Corporation of Newark, NewJersey as a solvent solution under the trade name Troysan Polyphase AFl.* The j treated samples were mixed randomly and exposed in dishes to at least three species of wood damaging fungi. The fungi used were:
Molds White Rot Asper~illus ni~er Trametes versicolor l aeci!omyces varioti Trametes s~.
Trichoderlna vlrlde Pol,yporus sp ocladlum ~, il Bro Rot Soft Rot Gloeophylluln trabeum Acremonium strictum us l~ eus Chaetomiuln ~lobosum Foria placenta 7~a~hium rubrum ~i Serpula 1 cum2ns . ~ trademark !l ''i ,1 ,i ! i ~7~S5 . 11 .' Mlldew Stain Aureobasidium pullalaria Chlorociboria aeru~inascens l Hormiscium sp. Cerotocystis vescus Torula ~ Diplodia ~E~
iThe exposed samples were incubated for thirty days under conditions ; of 90% relative humidy and 32C temperature to promote fungal growth. After incubation the degree of fungal attack and decay to each sample W2S measured 'I in square millimeters. The measurements were converted to express the per-centage of wood surface area protected. The results are shown in Table 1.
The preservative effectiveness for each composition shown in Table 1 is an '¦ average of ten measurements.
As seen from the data presented in said table, the wood preservative compositions of the present invention exert an unexpectedly increased wood preservative effect. The use of combinations of DDMAC and IPBC are more effective than the use of either compound alone at the same concentration of preservat;ve.
'~
!~
i !1 ~
3 ~7XS~8 il ;~
1~
O O O O O O O O O O ¦ ~a ;D
O ~nO ~ , O
~3 11 0~
~j~ IJa D
~D ~ . u~
~ ~ ~0 ~
o 000 000 000 ~0 ,,~ ~, : ~ ~ ~ o ~ ~ ~'~ 1 1~ ~o tl~ 3 t~l O o ~ (n O ~ 1 7 1 -O
000 uloo ~:3JO I tD O
o ooo ooo ooo ~ I' O
~ ~n O ~ ~ o ~ (n O ~ I I
ul o o ~ o o ~n o O ~ 11 ooo ooo ooo _ ~~
~, ~:Lo3 , !~
O O p~l ~O~D ~ 3 IIIXI:C.
: ~ a ~a ~ I a ~ 10 ~ 3 l~D
~ ~s 11~
G O O O <J~0 ~ U~ o I ~D
~ I O ~ ~
~ , .D
. ~ o ~.
~ ~ ~ Q ',~II'D
O O
, ~ ~ ~D
~' G ~ G C CO g C ,C~`~, c~. j ~ j~
i ¦ ~ a , :~ ~ ~r ~' ~
~ r 55~
,`' I .
Example 2 Samples of pine wood (19 x 19 x 457 mm) were pressure treated with DDMAC alone, IPBC alone, and a mixture of DDMAC and IPBC. The samples were ,I evaluated according to a standard wood preservative field test (ASTM D1758-~¦ 74). To obtain substantially equal wood preservative performance, which wasmeasured after six months of exposure, the following concentrations of the respective preservatives were needed.
. ~ i.
Kilograms of Preservative per Cubic Meter of ~ood Required for Protection IPBC DDMAC DDMAC and IPBC
Molds, Stain 12.80 12.80 5.73 .67 Decay 6.40 12.80 5.73 .67 Termites 12.80 6.40 5.73 .67 As seen from the data presen,ted in Table 2, the use of DDMAC in admixture with IPBC is generally more effective at much lower concentrations than either compound used alone.
~ I ~
,1 ~ I
Claims (12)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A synergistic wood preservative composition comprising didecyl-dimethyl ammonium chloride and 3-iodo-2-propynyl butyl carbamate.
2. The composition of Claim 1 wherein a water solution of didecyl-dimethyl ammonium chloride is combined with an organic solvent solution of 3-iodo-2-propynyl butyl carbamate to create an emulsion.
3. The composition of Claim 1 wherein the composition contains from 1-80 parts per weight of didecyldimethyl ammonium chloride per 1-10 parts per weight of 3-iodo-2-propynyl butyl carbamate.
4. The composition of Claim 1 wherein the composition contains from 4-20 parts per weight of didecyldimethyl ammonium chloride per 1 part per weight of 3-iodo-2-propynyl butyl carbamate.
5. A method of preserving wood comprising treating said wood with a synergistic wood preservative composition comprising didecyldimethyl ammonium chloride and 3-iodo-2-propynyl butyl carbamate.
6. The method of claim 5 wherein a water solution of didecyldimethyl ammonium chloride is combined with an organic solvent solution of 3-iodo-2-propynyl butyl carbamate to create an emulsion.
7. The method of claim 5 wherein the composition contains from 1-80 parts per weight of didecyldimethyl ammonium chloride per l-10 parts per weight of 3-iodo-2-propynyl butyl carbamate.
8. The method of claim 5 wherein the composition contains from 4-20 parts per weight of didecyldimethyl ammonium chloride per 1-10 parts per weight of 3-iodo-2-propynyl butyl carbamate.
9. A method of forming a synergistic wood preservative composition comprising combining didecyldimethyl ammonium chloride with 3-iodo-2-propynyl butyl carbamate.
10. The method of claim 9 wherein a water solution of didecyldimethyl ammonium chloride is combined with an organic solvent solution of 3-iodo-2-propynyl butyl carbamate to create an emulsion.
11. The method of claim 9 wherein the composition contains from 1-80 parts per weight of didecyldimethyl ammonium chloride par 1-10 part per weight of 3-iodo-2-propynyl butyl carbamate.
12. The method of claim 9 wherein the composition contains from 4-20 parts per weight of didecyldimethyl ammonium chloride per 1 part per weight of 3-iodo-2-propynyl butyl carbamate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506061A CA1272558A (en) | 1986-04-08 | 1986-04-08 | Wood preservatives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506061A CA1272558A (en) | 1986-04-08 | 1986-04-08 | Wood preservatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1272558A true CA1272558A (en) | 1990-08-14 |
Family
ID=4132827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000506061A Expired CA1272558A (en) | 1986-04-08 | 1986-04-08 | Wood preservatives |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1272558A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389300A (en) * | 1992-05-27 | 1995-02-14 | Bayer Aktiengesellschaft | Agent for protecting sawn timber |
| FR2777422A1 (en) * | 1998-04-17 | 1999-10-22 | Cecil | Treatment of cut timber to prevent fungal and mold attack |
-
1986
- 1986-04-08 CA CA000506061A patent/CA1272558A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389300A (en) * | 1992-05-27 | 1995-02-14 | Bayer Aktiengesellschaft | Agent for protecting sawn timber |
| FR2777422A1 (en) * | 1998-04-17 | 1999-10-22 | Cecil | Treatment of cut timber to prevent fungal and mold attack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |