U.S. Borax, Inc.

Pq Corporation

David M Schubert

Yatao Rachel Hu

Neil Miller

Mark J Manning

Jason D Lenox

The invention relates to a fire resistant composition and a method of making fire resistant cellulosic materials comprising the fire resistant composition. More specifically, the invention relates to liquid compositions, including liquid compositions comprising urea and a boron -containing compound for imparting fire resistance to cellulosic products. The boron-containing compound typically comprises boric acids; borates (i.e., boric acid salts); boric oxides (i.e., any compound containing boron and oxygen), and mixtures thereof.

Fire resistant cellulosic materials and method of making the same

Compositions and methods are provided for treating wood products to provide leach-resistant protection against fungal decay, termites and other wood destroying organisms. The preservative compositions provided include ammonia-stabilized solutions of zinc and boron, preferably in a molar ratio of Zn:B of between about 0.4:1 and 5:1, and are essentially copper free. The preservative may be applied by vacuum and/or pressure treatment or dip treatment under atmospheric pressure.

Ammoniacal borate and zinc compositions, and methods for treating wood products

Systems and methods are provided for treating products containing wood fibers to provide protection against wood destroying organisms and fire, and resistance against leaching of the preservative from the wood by water in exposed environments such as exterior applications. The methods involve applying to a substrate a first aqueous composition containing a boron compound, a source of zinc, and ammonia, followed by application of a second aqueous composition containing an alkali metal silicate. The compositions may be applied by vacuum and/or pressure treatment or dip treatment under atmospheric pressure.

Two-part borate, silicate and zinc compositions, and methods for treating wood products

A family of borate compounds containing an isolated (finite) nonaborate anion with the structural formula [BO(OH)]. Preferred amine nonaborate compounds have a resolved oxide formula of AO.3BO.2HO, where A is the monovalent cation of an amine salt, such as guanidinium and imidazolium. Also provided is a method for preparing these compounds by crystallization from an aqueous solution under mild conditions without the formation of significant amounts of by-products. These compounds have potential application as precursors for the production of advanced boron nitride ceramic materials, and as flame retardants, corrosion inhibitors, and biocides.

Nonaborate compositions and their preparation

An improved method is provided for producing crystalline calcium hexaborate tetrahydrate, synthetic nobleite, by the reaction of boric acid and lime in an aqueous slurry. Reaction conditions include boric acid to water molar ratios of greater than 0.25:1, lime to boric acid molar ratios in the range of 0.05-0.15:1 and temperatures in the range of 60.degree.-85.degree. C. A concentration of at least 25% by weight undissolved solids is in the aqueous product slurry.

Method for producing calcium borate

An improved method is provided for producing crystalline calcium hexaborate tetrahydrate, synthetic nobleite, by the reaction of boric acid and lime in an aqueous slurry. Reaction conditions include boric acid to water molar ratios of greater than 0.25:1, lime to boric acid molar ratios in the range of 0.05-0.15:1 and temperatures in the range of 85.degree.-105.degree. C. A novel crystalline product is produced having a unique crystal habit resulting in improved physical properties. Dehydration of this product produced a novel amorphous, anhydrous product having similar crystal habit and physical properties.

Lumber, plywood and other wood products are preserved from attack by fungi, termites and wood-destroying insects as well as fire and flame by treatment with a novel zirconium borate-containing preservative composition. The preservative can be formed by combination of a source of boron such as boric acid and the water-soluble salts thereof with a water-soluble zirconium salt. The ZrO.sub.2 :B.sub.2 O.sub.3 weight ratio in the preservative composition is in the range of from about 0.75:1 to about 10:1.

Compositions and methods for preserving wood products

Zinc borate compositions having a ZnO:B.sub.2 O.sub.3 ratio of 4:1. The hydrated zinc borate 4ZnO.B.sub.2 O.sub.3.H.sub.2 O and anhydrous zinc borate 4ZnO.B.sub.2 O.sub.3 are especially useful as fire-retardants and smoke-suppressant additives for polymeric compositions.

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Los Angeles, CA, United States of America

David M Schubert