David Michael Schubert

US Patent:

6919036, Jul 19, 2005

Filed:

Jan 18, 2001

Appl. No.:

10/181628

Inventors:

David M. Schubert - Los Angeles CA, US

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

C01B035/18
C07F005/02
C09K021/00
A01N055/08

US Classification:

252601, 25238941, 423277, 501 964, 514 64, 564 8

Abstract:

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.

US Patent:

8308997, Nov 13, 2012

Filed:

Dec 17, 2008

Appl. No.:

12/337494

Inventors:

David M. Schubert - Lone Tree CO, US

Assignee:

U.S. Borax Inc. - Greenwood Village CO

International Classification:

C09K 21/00
B32B 5/02

US Classification:

252608, 252607, 442136, 442140

Abstract:

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.

US Patent:

20080305351, Dec 11, 2008

Filed:

Mar 24, 2005

Appl. No.:

10/593936

Inventors:

David M. Schubert - Lone Tree CO, US

International Classification:

B32B 21/04
B05D 3/02
C09K 21/02

US Classification:

4285371, 427384, 252608, 252607

Abstract:

A method for inhibiting the crystallization of boric acid is provided. Boric acid is dissolved in water and a vitrifying agent, such as an amino alcohol or amino acid, to form an aqueous mixture which is then dried to form a vitreous boric acid-containing residue. This mixture, when applied to a surface and allowed to dry on the surface, forms a vitreous boric acid-containing coating which is readily adherent to the surface, or if allowed to penetrate into a porous substrate, deposits a vitreous boric acid-containing residue within the substrate upon drying. The vitreous boric acid-containing residue provides beneficial properties, including for example improved fire retardancy and biocidal protection, to a variety of materials such as cotton batting, cellulose, and wood and paper products and gypsum wallboard.

US Patent:

56120940, Mar 18, 1997

Filed:

Oct 18, 1995

Appl. No.:

8/544903

Inventors:

David M. Schubert - Los Angeles CA
Mark J. Manning - Los Angeles CA

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

A01N 300
A01N 5914

US Classification:

427397

Abstract:

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.

US Patent:

56884818, Nov 18, 1997

Filed:

Oct 18, 1995

Appl. No.:

8/544518

Inventors:

David M. Schubert - Los Angeles CA

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

C01B 3512

US Classification:

423279

Abstract:

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.

US Patent:

54726441, Dec 5, 1995

Filed:

Jun 10, 1994

Appl. No.:

8/258163

Inventors:

David M. Schubert - Los Angeles CA

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

C01B 3512
C09K 2102

US Classification:

252609

Abstract:

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.

US Patent:

57859396, Jul 28, 1998

Filed:

Apr 18, 1997

Appl. No.:

8/844481

Inventors:

David M. Schubert - Los Angeles CA

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

C01B 3512

US Classification:

423279

Abstract:

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.

US Patent:

53425537, Aug 30, 1994

Filed:

Nov 22, 1991

Appl. No.:

7/796289

Inventors:

David M. Schubert - Los Angeles CA

Assignee:

U. S. Borax Inc. - Valencia CA

International Classification:

C09K 2102
C01B 3512

US Classification:

252609

Abstract:

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.