BACKGROUND OF THE INVENTION

This invention relates to compositions which are combination of weather resistant (resist leaching out) , fire retardan preservatives for the treatment of wood and cellulose products There have been numerous fire retardant formulations and many woo preservatives developed up to this time. Much work has been don with borates in the area of wood preservation and with sulfates phosphates, urea and magnesium chloride in the area of fir retardants. However, until the development of the compositions se forth herein, there has not been developed a composition tha combines the properties of being both an effective woo preservative and fire retardant with resistance to weather an leaching.

The obective of this invention is to provide several chemica compositions which are easily, inexpensively and safely applied t wood or cellulose products, which are suitable for exterior use an which combine the functions of preserving and protecting wood an cellulose products against deterioration due to molds, fungi insects, weather, fire and flame.

SUMMARY OF THE INVENTION

The invention consists of nine combinations of various of th following compounds: borax, boric acid, boric oxide, urea magnesium chloride, ammonium polyphosphate solution, ammoniu thiosulphate solution and triethyla ine in an aqueous solutio

mixed with a water-based acrylic resin compatible to the compounds These compositions are applied to wood and cellulose products b spraying, brushing, rolling, pouring, dipping, immersing o pressure impregnation, depending on the material being treated an the purpose for which it is intended.

There are nine combinations of these chemical compounds i this invention, forming nine different useful compositions o matter. The nine combinations have slight variations from eac other designed to maximize performance for different particular applications. All variations are water based and utilize a water- based acrylic resin in each composition.

The main water portion of the composition (as differentiated from the water in the acrylic resin) acts only as a carrier and is intended to evaporate after application. This evaporation should be complete before the composition is exposed to weather or to fire.

The inclusion of the specific acrylic resin to the composition prevents the other chemical compounds, which are normally water soluable, from leaching or washing out of the wood or cellulose products after application. This may occur through the encapsulation of the soluble salts in the acrylic resin. After complete drying, the composition will bind and adhere inside the wood or cellulose products and exposure to water or moisture will only cause the composition to .slightly swell in size rather than return to an aqueous solution. In some mechanism not fully understood at this time, the water-based acrylic resin solution

used inhibits the hydrolization of the retardant salts whic heretofore eventually turned to acids and eventually deteriorate the treated wood or cellulose product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following is a list of components to the variou compositions and the range in which they appear in this patent se forth in parts by weight per thousand.

By way of additional explanation, the acrylic resin referre to throughout this application may be a pre-manufactured water-bas acrylic resin solution comprising the following chemicals o equivalents, and is employed in its liquid form. One such produc is marketed by Dock Resins under the brand name DORESCO AC 8-6 Acrylic Resin Solution.

(a) Sytrene (phenylethene) - C ₆ H ₅ CH:CH ₂

(b) Acrylic acid (propenoic acid) - CH ₂ :CHCOOH

(c) Hydroxy ethylacrylate - CH:CHCOOCH ₃ OH

(d) Ethylene glycol - CH ₂ OHCH ₂ OH

(e) Dimethylaminoethanol - (CH ₃ ) ₂ NCH ₂ CH ₂ OH

(f) Ammonia - NH ₄

(g) Water - H ₂ 0

The water base acrylic resins utilized throughout have bee previously used in inks rather than as components of paints o coatings. They are solutions not emulsions. Their main component are styrene, acrylic acid (propenoic acid) an hydroxylmethlacrylate stabilized with ammonia or an alkyl primar amine in a water solution. The following are formulas for th blending of the aforementioned chemical compounds to produce th variety of compositions which constitute this invention. Th components for each composition are expressed as parts by weigh

per thousand whether they be in pre-manufactured solutions granular\powdered form. The mixing instructions following t various compositions should be followed closely. Deviation fr the order of mixing or the amount of the component part may cau coagulation of the mixture rendering the same less effective.

COMPOSITION I

Compound Parts By Weight Per Thousand

Borax 5

Boric acid 3

Urea 10

Magnesium chloride 2

Acrylic resin 7

Triethylamine 1

Carrier water 71

Total 1,00

Mixing instructions: The borax, boric acid, urea an magnesium chloride, all in powder/granular form, are mixed togethe and then dissolved completely in the water. Only after th granular compounds, particularly the magnesium chloride, hav completely dissolved in the water should the triethylamine and th acrylic resin be mixed thoroughly throughout the solution. Fo best results, the acrylic resin should be added as near to the tim of applicaiton to the wood or cellulose products as possible.

COMPOSITION II

Compound Parts By Weight Per Thousand

Borax 5

Boric acid 3

Ammonium thiosulphate 10

Ammonium polyphosphate 5

Acrylic resin 7

Carrier water 695

Total 1,000

Mixing instructions: The ammonium thiosulphate solution an the ammonium polyphosphate solution are first mixed together wit the water. The borax and boric acid are then dissolved completel into this solution. The acrylic resin is similarly to b completely blended in the solution. For the best results, the acrylic resin should be added as near to the time of application to the wood or cellulose products as possible. COMPOSITION III

Compound Parts By Weight Per Thousand

Borax 60

Boric acid 40

Ammonium thiosulphate 100

Magnesium chloride 20

Acrylic resin 75

Carrier water 705

Total 1,000

Mixing instructions: The ammonium thiosulphate is first added to the water. To this are then added the borax, boric acid and magnesium chloride. These granular compounds must be completely dissolved in the solution. The acrylic resin is then mixed thoroughly throughout the solution. For best results, the acrylic resin should be added as near to the time of application to the wood or cellulose products as possible

COMPOSITION IV

Compound Parts By Weight Per Thousand

Borax 60

Boric acid 40

Urea 100

Triethylamine 10

Acrylic resin 100

Carrier water 690

Total 1,0

Mixing instructions: The borax, boric acid and urea, all powder/granular form, are mixed together and then dissolv completely in the water. Only after the granular compounds ha completely dissolved in the water should the triethylamine and t acrylic resin be mixed thoroughly throughout the solution. Fo best results, the acrylic resin should be added as near to the tim of application to the wood or cellulose products as possible. COMPOSITION V

Compound Parts By Weight Per Thousand

Borax 8

Boric acid 6

Ammonium thiosulphate 5

Triethylamine 1

Acrylic resin 7

Carrier water 73

Total 1,00

Mixing instructions: The ammonium thiosulphate is first adde to the water. The borax and boric acid are then added and mixe until completely dissolved. The triethylamine and the acryli resin are then added and mixed thoroughly throughout the solution.

For best results the acrylic resin should be added as near to th time of application to the wood or cellulose products as possible.

COMPOSITION VI

Compound Parts B Weight Per Thousand

Borax 80

Boric acid 60

Triethylamine 10

Acrylic resin 100

Carrier water 750

Total 1,000

Mixing instructions: The borax and boric acid are first dissolved completely in the water. The triethylamine and the acrylic resin are then added and mixed thoroughly throughout the solution. For best results, the acrylic resin should be added as near to the time of application to the wood or cellulose products as possible. COMPOSITION VII

Compound Parts Bv Weight Per Thousand

Borax 60

Boric acid 30

Ammonium polyphosphate 100

Acrylic resin 60

Carrier water 750

Total 1,000

Mixing instructions: the ammonium polyphosphate is first added to the water. The borax and the boric acid are then completely dissolved in the solution. Next, the acrylic resin is added and mixed thoroughly throughout the solution. For best results, the acrylic resin should be added as near to the time of appication to the wood or cellulose products as possible.

COMPOSITION VIII

Compound Parts By Weight Per Thousand

Borax 80

Boric acid 60

Magnesium chloride 40

Triethylamine 10

Acrylic resin 75

Carrier water 735

Total 1,000

Mixing instructions: the borax, boric acid and magnesium chloride are first dissolved completely in the water. The

triethylamine and the acrylic resi are then mixed thoroughl throughout the solution. For best results, the acrylic resi should be added as near to the time of application to the wood o cellulose products as possible.

COMPOSITION IX

Compound Parts By Weight Per Thousand

Boric oxide 10

Triethylamine 1

Acrylic resin 10

Carrier water 79

Total 1,00

Mixing instructions: the boric oxide is dissolved completel in the water. The triethylamine and the acrylic resin are the mixed thoroughly throughout the solution. For best results, th acrylic resin should be added as near to the time of application t the wood or cellulose products as possible.

COMPONENT PARTS BY WEIGHT PER THOUSAND

Solids: Range:

Boric acid

Borax

Boric oxide

Urea

Magnesium chloride

Liquids:

Ammonium polyphosphate solution

Ammonium thiosulphate solution

Triethylamine

Acrylic resin

Water

By way of explanation, the ammonium polyphosphate solution referred to throughout this application is a pre-manufactured blend of the following chemicals:

CHEMICAL PERCENT f%ι BY WEIGHT

(a) Phosphate (P ₂ 0 ₅ ) i) as polyphosphate 23.12 ii) as orthophosphate 10.88

(b) Ammoniacal nitrogen (N) 10.00

(c) Potassium monoxide (K ₂ 0) 0.10

(d) Sulphur tetroxide (S0 ₄ ) 2.00

(e) Magnesium oxide (MgO) 0.25

(f) Calcium oxide (CaO) 0.07

(g) Zinc oxide (ZnO) 0.08

(h) Manganese oxide (MnO) 0.02

(i) Iron (III) oxide (Fe ₂ 0 ₃ ) 0.40

(j) Copper (II) oxide (CuO) 0.005

(k) Boron (B) 0.01

(1) Florine (F) 0.20

( ) Water (H ₂ 0) 52.865

Total 100.00 percent

By way of additional explanation, the ammonium thiosulphate solution referred to throughout this application is a pre- manufactured blend of the following chemicals to arrive at the following chemical formula (NH ₄ ) ₂ S ₂ 0 ₃ ) :

CHEMICAL PERCENT (%) BY WEIGHT

(a) Ammoniacal nitrogen 12.0

(b) Sulphur 26.0

(c) Water 72.0

Total 100.0 percent

By way of additional explanation, the borax referred to throughout this application is sodium tetraborate pentahydrate (Na ₂ B ₄ 0 ₇ 5H ₂ 0) commonly sold by manufacturers as Borax 5 Mol. This compound is used here in its granular or powdered form and comprises the following chemicals: CHEMICAL PERCENT (%) BY WEIGHT

(a) Sodium oxide (Na ₂ 0) 21.28

(b) Boric oxide (B ₂ 0 ₃ ) 47.80

(c) Water by

crystalization (H ₂ 0) 30.9

Total 100.00 percen

By way of additional explanation, the boric acid referred t throughout this application is orthoboric acid (H ₃ B0 ₃ ) . It i employed here in its powdered or granulated form and comprises th following chemicals: CHEMICAL PERCENT f%) BY WEIGHT

(a) Boric oxide (B ₂ 0 ₃ ) 56.30

(b) Water by crystalization 43.70

Total 100.00 percent

By way of additional explanation, the borix oxide referred to throughout this application is disodium octaborate tetrahydrate and is a premanufactured compound produced by United States Borax and Chemical Corporation under U.S. Patent No. 2,998,310 and having a chemical formula of Na ₂ B ₈ 0 ₁₃ -4H ₂ 0.

By way of additional explanation, the magnesium chloride referred to throughout this application has a chemical formula of MgCl ₂ and is employed in its flaked or granular form.

By way of additional explanation, the urea referred to throughout this application has a chemical formula of CO(NH ₂ ) ₂ and is employed in its granular form.

By way of additional explanation, the triethylamine referred to throughout this application has a chemical formula of (C ₂ H ₅ ) ₃ N and is employed in its liquid form.

While the invention has been described in connection with preferred embodiment, it is not intended to limit the invention t the particular form set foth, but, on the contrary, it is intende to cover alternatives, modifications, and equivalents, as may b included within the spirit and scope of the invention as defined b the appended claims.