Compositions – Fire retarding – For solid synthetic polymer and reactants thereof
Reexamination Certificate
2001-01-05
2002-07-23
Anthony, Joseph D. (Department: 1714)
Compositions
Fire retarding
For solid synthetic polymer and reactants thereof
C252S607000, C252S608000, C252S601000, C528S259000, C523S179000, C521S094000, C521S095000, C564S008000
Reexamination Certificate
active
06423251
ABSTRACT:
FIELD
This invention concerns solid or aqueous urea and/or urea condensates and boron salts emulsions utilized as fire and termite controlling agent. The invention also concerns the preparation and use of solid or aqueous emulsions of urea and/or urea condensates and/or partially hydrolyzed urea condensate and boron salts emulsions. The aqueous urea and/or urea condensates and boron salts are useful to stop house fires, grass and forest fires, to produce flame retarded water based plastic, flame retarded polyurethane foam ,etc, and flame retard flammable organic materials by spraying the outside with aqueous emulsions of urea and/or an aqueous urea composition and for termite control in wood, lignin-cellulose, cellulose products and organic foams. The powdered urea and/or urea condensates and powdered boron salts may be used to flame retard plastics.
BACKGROUND
Urea in the form of a solid compound has been used as a flame retardant agent in polyurethane foams as outline in U.S. Pat. No. 4,385,131 (Fracalossi, et al.). Many patents use solid urea condensates, urea phosphates, urea borates and urea derivative as the flame retardant agent. The use of urea and/or urea condensate with boron salts as both the flame retardant and termite controlling compound is novel. The urea condensate-boron oxyacid salt is novel. The urea condensate-boron oxyacid salt slowly breaks down in an aqueous solution to urea, urea condensate and boron oxyacid salts. Boron oxyacid salts are being utilized as termite insecticides and have some flame retardant properties, but are not adequate to pass the required flame retardant tests. When solid urea is used in sufficient amounts, as the flame retardant retardant compound in the production flame retardant organic products, such as polyurethane products it leaves a slimy or soapy feel to the outer surface of the urethane products, which is very undesirable. The urea migrates out and the product becomes less fire retardant. When the aqueous urea is utilized, the water and urea reacts with the polyisocyanate and becomes a part of the product. There is no slimy or soapy feel to this foam. Aqueous urea is a fertilizer and is very environmentally safe product to use on grass and forest fires. When used for fire fighting and termite control the aqueous urea and/or urea condensate and boron oxyacid salts may contain coloring agents such as iron oxide, thickening agents, gelling agents, corrosive inhibitors, bactericide agents, surfactant and wetting agents.
What is lacking and what is needed are useful, safe and inexpensive flame retardant compounds and termite control compounds combinations found in aqueous urea and/or urea condensate and boron oxyacid salts. What is additionally lacking are compositions have solid or aqueous urea and/or urea condensates and boron oxyacid salts employed therein.
SUMMARY
In one aspect, the invention comprises the flame retardant and termite insecticide aqueous urea and/or urea condensates with boron oxyacid salts. Another aspect of the invention is a process to prepare the solid or aqueous urea and/or urea condensate with boron oxyacid salts. Urea and boron oxyacid salts are commercially available. Termites are found in wood and in some plastic around wood such as organic foams, such a polyurethane insulation and furniture foams, paper materials and cellulose insulations.
Another aspect of this invention is the process to prepare a urea condensate-boron oxyacid salt composition by mixing, heating and reaction the following components.
(A) urea and/or urea condensate and/or partially hydrolyzed urea condensate in the amount of 100 to 200 parts by weight,
(B) boron oxyacid, in the amount of 25 to 100 parts by weight;
(C) alkali metal and/or alkaline earth metal oxide or hydroxide, in the amount of 25 to 75 parts by weight;
(D) water 0 to 1000 parts by weight,
(E) carbonization auxiliaries, in the amount of 0 to 200 parts by weight, then add and mix
(F) metal containing compound that will accelerate the carbonization process, in the amount of 0 to 30 parts by weight;
(G) heat reflecting compound, in the amount of 0 to 30 parts by weight;
(H) filler, in the amount of 0 to 200 parts by weight;
(I) surfactant, in the amount of 0 to 30 parts by weight.
Another aspect of this invention is to apply on and/or incorporating in a more flammable organic material the flame retardant and termite insecticide composition, solid or aqueous urea and/or urea condensates with boron oxyacid salt or the solid or aqueous urea and/or urea condensate-boron oxyacid salts composition.
Another aspect of this invention is to utilize the aqueous urea and/or urea condensate and boron oxyacid salt composition or urea condensate-boron oxyacid salt to fight or prevent fires such as grass fires, forest fires, house fires, furniture fires, etc and prevent termite damage in wood products. In fighting grass fires a water diluted solution of aqueous urea and/or urea condensate with boron oxyacid salts and/or it's composition with or without surfactant, to produce bubbles may be sprayed directly on the flames or may be sprayed in front of the flames thereby wetting the organic materials in front of the fire The aqueous urea and/ urea condensate and boron oxyacid salts composition, even after drying, and for several day afterwards, will prevent the coated organic materials such as grass, leaves and bushes from catching on fire when exposed to flames. Wood is penetrated deeper when this aqueous urea condensate-boron oxyacid salt composition is warm or hot, when applied under pressure or in a vacuum or when a surfactant such as a glycol, e.g., ethylene glycol, propylene glycol, polypropylene glycol, polyols, and ethylene oxides such as propylene oxide or other surfactant containing hydroxyl radicals added to the composition. The powdered composition of this invention may be made more fluid by adding alcohol, polyurethane blowing agents such as methylene chloride, halogenated polymethylene compounds, alkylene oxides or other organic solvents.
Component A
Any suitable urea may be utilized in this invention. Usually the aqueous solution of urea contains 50% or less of urea. Urea condensates, such as biuret, cyanuric acid, cyamelide and partially hydrolyzed urea condensates may also be used in the amount of 100 to 200 parts by weight.
Component B
Any suitable boron oxyacid may b used in this invention. Boric acid is preferred. Suitable boron salts are alkali metal boron oxyacids, alkaline earth metal boron oxyacids and metal boron oxyacids. Sodium borate and zinc borate are the preferred boron oxyacid salts. Boron oxyacid may be used in the amount of 25 to 100 parts by weight. The boron oxyacid salts may be used in the amount of 50 to 100 parts by weight.
Component C
Any suitable basic salt forming compound containing an alkali metal or alkaline metal oxide or hydroxide may be used in this invention. Alkali metal oxides or hydroxide and alkaline earth metal oxides and hydroxide, preferable sodium hydroxide and zinc oxide. The alkali metal oxides or hydroxides and/or alkaline earth metal oxides or hydroxides are used in the amount of 25 to 75 parts by weight. The basic salt forming compound such as sodium hydroxide or zinc oxide may be first reacted with the boron oxyacid to produce sodium borate or zinc borate and use in the amount of 50 to 100 parts by weight, then mixed with or reacted with the urea compounds.
Component D
Any suitable amount of water may be used, referable 0 to 1000 parts by weight.
Component E
Any suitable carbonization auxiliaries may be utilized in this invention. Suitable carbonization auxiliaries are compounds that in the presence of fire assist the formation of a carbonization foam or char, such as, additives that produce acidic components in the pyrolysis mixture, such as phosphorus acids, boric acids or sulfuric acids. These acidic components are compounds such, for example, acids or salts, or their derivatives of sulfur, boron and phosphorus, such as, boron-phosphates, phosphates, and polyphosphates of ammonia, amines, polyamines, amino compound
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