Laxmi Chandra Gupta, 872852 Mainway Dr, Los Alamitos, CA 90720

6870000, Mar 22, 2005

Mar 31, 2003

10/403647

Laxmi C. Gupta - Los Alamitos CA, US

C08J003/00
C08K003/20
C08L075/00
C08G018/00
C08G018/32

524591, 524590, 524839, 524840, 528 44, 528 85

Increased health, safety, and environmental awareness motivated the development of new and improved water curing technology for formulating, manufacturing, and using water curable compositions (also referred to in the art as water induced urethanes). The present invention is based, at least in part, upon the concept of formulating NCO functional resins used in water curable compositions from one or more polyisocyanate constituents that comprise at least one sterically hindered isomer of diphenyl methane diisocyanate (MDI). These isomers have a combination of exceptionally low vapor pressure and suitable moisture reactivity that lead to numerous advantages. Due to their low volatility, these isomers may be substituted for all or a portion of the TDI content of a conventional water induced urethane formulation. Particularly preferred embodiments eliminate any TDI, have 100% solids, are solvent free, and are characterized by essentially zero VOC emissions with respect to isocyanate. The compositions are substantially more environmentally friendly than conventional formulations.

7001948, Feb 21, 2006

May 13, 2002

10/145325

Laxmi C. Gupta - Los Alamitos CA, US
Ashish Dhuldhoya - Chino Hills CA, US

American Polymer Corporation - Santa Fe Springs CA

C08L 75/00

524871

A polyurea coating layer is provided, which is the reaction product of an isocyanate composition and an amine composition. The isocyanate composition comprises isocyanate functional compounds selected from a first set of isocyanate compounds having an average isocyanate functionality of at least about 3 and having an equivalent weight of from about 180 to about 240. The first set of isocyanate compounds preferably are at least about 65% of the isocyanate compounds. The isocyanate composition has an average isocyanate functionality of at least about 2. 5. The amine composition comprises amine functional compounds selected from a first set of secondary amine compounds having an equivalent weight of from about 200 to about 280 (preferably as about 50 to about 80% of the amine compounds), and a second set of secondary amine compounds having an equivalent weight of from about 30 to about 180 (preferably as about 20 to about 40% of the amine compounds). The amine composition has an average amine functionality of about 1. 5 to about 2. 5.

7148287, Dec 12, 2006

May 13, 2004

10/844957

Laxmi C. Gupta - Los Alamitos CA, US

C08G 18/10

524871, 528 59

Compositions incorporating water-curable urethane constituent(s) are formulated with favorable viscosity and viscosity stability characteristics, while at the same time, preserving desired hardness characteristics. The present invention is particularly useful in applications in which water-curable compositions include NCO-functional resins having relatively high NCO content and/or incorporate MDI-based constituents. Preferred modes of practicing the invention include implementing one or more formulation strategies to help retain hardness while preserving good viscosity characteristics. These preferred strategies involve (i) balancing scavenger, polyisocyanate and polyfunctional polyol content of the compositions or resins thereof, as the case may be, (ii) formulating an NCO-functional resin with chain extender constituent(s) to enhance viscosity stability, (iii) formulating with one or more plasticizers that enhance viscosity performance, and (iv) combinations of two or more of these strategies.

7833575, Nov 16, 2010

Nov 7, 2006

11/593747

Laxmi C. Gupta - Los Alamitos CA, US

B05D 1/12
B05D 1/36

427202, 427180, 427201

A method is provided for applying a fire retardant coating system. The method comprises providing a first component that is a coatable polymeric coating composition and a second component comprising granules, wherein the granules comprise a polymeric matrix comprising a plurality of regions of fire retardant material ingredient incorporated therein. The first component and the second component are separate as delivered to the site of application. The first component and the second component are applied onto a substrate so that the granules are adhered to the substrate by the polymeric coating composition. The polymeric coating composition is then allowed to cure to form a fire-retardant coating. The resulting fire-retardant coating affords surprising fire retardancy performance.

2003000, Jan 2, 2003

May 16, 2001

09/859202

Laxmi Gupta - Los Alamitos CA, US
Ashish Dhuldhoya - Chino Hills CA, US

C08K003/00

524/871000

A polyurea sealant top-coat composition for application onto a substrate, including a polyester product. Two general two-component compositions are included, with the first component of the first composition including isophorone diisocyanate monomer; propylene glycol; siloxane leveling additive; diisononyl phthalate; dibutyltin dilaurate; and tris(6-isocyanatohexyl) isocyanurate. The second component of the first composition includes low-viscosity amine functional resin; isophorone diamine; long chain alcohol polar acidic ester; titanium dioxide; ground silica; aliphatic diamine chain extender; alumina silicate; silicon dioxide; silicon antifoam; anti-cratering silicon surface additive; acrylate leveling additive; hydroxyphenyl-benzotriazole ultraviolet absorber; sebacate light stabilizer; silane adhesion promoter; bismuth deconoate catalyst; ethylenediamine/propylene glycol catalyst; and dibutyltin dilaurate. The second coating composition has only tris(isocyanatohexyl) isocyanurate as the first component thereof, while the second component thereof contains the same ingredients as that of the first composition. First and second components are in a 1:1 weight ratio.

2005014, Jul 7, 2005

Feb 28, 2005

11/069530

Laxmi Gupta - Los Alamitos CA, US

C08G018/00

521159000

Increased health, safety, and environmental awareness motivated the development of new and improved water curing technology for formulating, manufacturing, and using water curable compositions (also referred to in the art as water induced urethanes). The present invention is based, at least in part, upon the concept of formulating NCO functional resins used in water curable compositions from one or more polyisocyanate constituents that comprise at least one sterically hindered isomer of diphenyl methane diisocyanate (MDI). These isomers have a combination of exceptionally low vapor pressure and suitable moisture reactivity that lead to numerous advantages. Due to their low volatility, these isomers may be substituted for all or a portion of the TDI content of a conventional water induced urethane formulation. Particularly preferred embodiments eliminate any TDI, have 100% solids, are solvent free, and are characterized by essentially zero VOC emissions with respect to isocyanate. The compositions are substantially more environmentally friendly than conventional formulations.

2006016, Jul 20, 2006

Jan 19, 2006

11/337053

Laxmi Gupta - Los Alamitos CA, US
Ashish Dhuldhoya - Chino Hills CA, US

C08G 18/00

528044000

The present invention relates to flame retardant systems that include a combination of at least two flame retardant ingredients that is more effective than either flame retardant ingredient alone in a two-part, isocyanate-based, curable system. In certain embodiments, a third, intumescent flame-retardant ingredient provides a flame retardant system that is more effective than 1) any of the flame retardant ingredients alone in a two-part, isocyanate-based, curable system and 2) the same flame retardant system without the added third ingredient.

2007008, Apr 12, 2007

Oct 11, 2005

11/248927

Laxmi Gupta - Los Alamitos CA, US

C08G 18/08

524589000, 524401000

Increased health, safety, and environmental awareness motivated the development of new and improved water curing technology for formulating, manufacturing, and using water curable compositions (also referred to in the art as water induced urethanes). The present invention is based, at least in part, upon the concept of formulating NCO functional resins used in water curable compositions from one or more polyisocyanate constituents that comprise at least one sterically hindered isomer of diphenyl methane diisocyanate (MDI). These isomers have a combination of exceptionally low vapor pressure and suitable moisture reactivity that lead to numerous advantages. Due to their low volatility, these isomers may be substituted for all or a portion of the TDI content of a conventional water induced urethane formulation. In a preferred embodiment, fly ash is incorporated into the water-curable compositions described herein. Particularly preferred embodiments eliminate any TDI, have 100% solids, are solvent free, and are characterized by essentially zero VOC emissions with respect to isocyanate. The compositions are substantially more environmentally friendly than conventional formulations.