Juan A Vazquez
Radiology at 94 Ave, Miami, FL

7879922, Feb 1, 2011

Nov 20, 2007

11/942979

Juan Miguel Vazquez - Miami FL, US

PolyuMAC Inc. - Miami FL

C08F 2/48, C08F 259/04, C08J 9/04

521 75, 521 90, 521 94, 521139, 521145, 521149, 521155, 521189

Expanded products, more specifically, rigid or semi-flexible foams of low density from 1. 5 to 12 lbs/ftor more, with closed cells can be manufactured. The products have a PVC backbone with branches with methacrylate crosslinked with isocyanate through a reaction activated by ultraviolet or microwave radiation. The use of polyfunctional monomers that are sensitive to irradiation yields a higher cross-link density, which improves the physical and mechanical properties such as hardness, resistance to abrasion, ductility, and resistance to friction. The selection of monomers and oligomers allows the manufacturer to determine of the final properties of the foam. The process yields foams with extreme hardness and better shear factors making the foam an ideal product for aerospace and windmill use. These physical properties emerge during the post-curing process, preferably by use of compounds based on methacrylates in dispersion with PVC and isocyanates.

6956066, Oct 18, 2005

Feb 11, 2004

10/779552

Juan M. Vazquez - Miami FL, US
Roberto J. Cano - Yorktown VA, US
Brian J. Jensen - Williamsburg VA, US
Erik S. Weiser - Yorktown VA, US

The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC

C08J009/04

521 501, 521 88, 521119, 521157, 521153, 528 73, 528 59

A fully imidized, solvent-free polyimide foam having excellent mechanical, acoustic, thermal, and flame resistant properties is produced. A first solution is provided, which includes one or more aromatic dianhydrides or derivatives of aromatic dianhydrides, and may include one or more aromatic diamines, dissolved in one or more polar solvents, along with an effective amount of one or more blowing agents. This first solution may also advantageously include effective amounts respectively of one or mores catalysts, one or more surfactants, and one or more fire retardants. A second solution is also provided which includes one or more isocyanates. The first and second solutions are rapidly and thoroughly mixed to produce an admixture, which is allowed to foam—in an open container, or in a closed mold—under ambient conditions to completion produce a foamed product. This foamed product is then cured by high frequency electromagnetic radiation, thermal energy, or a combination thereof. Alternatively, the process is adapted for spraying or extrusion.

7541388, Jun 2, 2009

May 5, 2005

11/124640

Juan M. Vazquez - Miami FL, US
Roberto J. Cano - Yorktown VA, US
Brian J. Jensen - Williamsburg VA, US
Erik S. Weiser - Yorktown VA, US

The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC

C08J 9/04

521124, 521119, 521129, 521157, 521163, 521 88, 528353

A fully imidized, solvent-free polyimide foam having excellent mechanical, acoustic, thermal, and flame resistant properties is produced. A first solution is provided, which includes one or more aromatic dianhydrides or derivatives of aromatic dianhydrides, and may include one or more aromatic diamines, dissolved in one or more polar solvents, along with an effective amount of one or more blowing agents. This first solution may also advantageously include effective amounts respectively of one or mores catalysts, one or more surfactants, and one or more fire retardants. A second solution is also provided which includes one or more isocyanates. The first and second solutions are rapidly and thoroughly mixed to produce an admixture, which is allowed to foam—in an open container, or in a closed mold—under ambient conditions to completion produce a foamed product. This foamed product is then cured by high frequency electromagnetic radiation, thermal energy, or a combination thereof. Alternatively, the process is adapted for spraying or extrusion.