Richard W Hart

US Patent:

55083404, Apr 16, 1996

Filed:

Sep 9, 1994

Appl. No.:

8/303356

Inventors:

Richard E. Hart - Irvine CA

Assignee:

R. E. Hart Labs, Inc. - CA

International Classification:

C08G 1832

US Classification:

524591

Abstract:

A substantially solvent free aqueous two-component coating composition dispersion which, when applied to a substrate, cures to a film having properties of adhesion and bonding which are equal to or superior to films obtained from conventional solvent-based two-component polyurethane or epoxy systems. The first component is a combined aqueous polyol phase and an amine phase. The polyol phase comprises a member consisting of an acid containing polyol or a blend of polyols containing an acid containing polyol such that the average hydroxyl functionality of the polyol phase is at least 1. 5 and has an acid number of between about 15 and 200. The amine phase is an amine or blend of amines containing active hydrogens reactive with NCO groups such that the average active hydrogen functionality is at least 1. 5. The amine phase is present in a quantity sufficient to substantially neutralize the acid containing polyols. The second component is a member selected from the group consisting of an aliphatic polyisocyanate, a cycloaliphatic polyisocyanate and an aromatic polyisocyanate and adducts and mixtures thereof.

US Patent:

D2633370, Mar 9, 1982

Filed:

Feb 11, 1980

Appl. No.:

6/120088

Inventors:

Richard E. Hart - Huntington Beach CA
William C. Biehl - Huntington Beach CA

Assignee:

Davco Chemicals & Plastics - Huntington Beach CA

International Classification:

D2404

US Classification:

D24 62

US Patent:

41748506, Nov 20, 1979

Filed:

May 30, 1978

Appl. No.:

5/910473

Inventors:

Richard K. Hart - Cerritos CA

International Classification:

B62D 2516

US Classification:

280153R

Abstract:

A clip apparatus for releasably securing a fender flare onto a vehicle fender. The apparatus utilizes a bolt which is tightened so as to engage the flare and the fender and rigidly retain the flare on the fender.

US Patent:

D3363805, Jun 15, 1993

Filed:

Nov 30, 1989

Appl. No.:

7/444182

Inventors:

James E. Roseen - Rancho Palos Verdes CA
Richard S. Hart - Elgin IL
Jeffrey P. Heuel - Elmhurst IL

Assignee:

Systems Furniture Company - Torrance CA

US Classification:

D 6366

US Patent:

54726344, Dec 5, 1995

Filed:

Sep 27, 1994

Appl. No.:

8/312700

Inventors:

Richard E. Hart - Irvine CA

Assignee:

R. E. Hart Labs, Inc. - Irvine CA

International Classification:

C08K 516

US Classification:

252193

Abstract:

A water based, solvent free, two component polyurethane-polyurea dispersion containing up to 65% solids. The first component is a polyester-polyol phase and an aqueous amine phase mixture. The polyester-polyol is a combination of modified polyester-polyols, low viscosity polyether or polyester-polyols, chain extending low molecular weight polyols, neutralizing amines and a detergent. It has a solids content of 90-100% and is totally hydroxyl functional with a carboxylic acid number of 10 and 50, an hydroxyl number of 180 and 300, an equivalent weight range of 165 and 365 and a viscosity of 600-1500 cps at 25. degree. C. The amine phase is an combination of neutralizing and chain extending amines having ratios preformulated to provide a balanced chain extending crosslinking reaction in aqueous phase with --NCO reactive groups. The aqueous amine blend has an equivalent weight of 40 to 50 and a solids content of 40-60%. The polyester-polyol and amine phases are combined in water at room temperature to form a aqueous component having a solids content of 33 to 48% and has an equivalent ratio between polyester-polyol phase and amine phase of 1. 75:1 to 2. 25:2.

US Patent:

41099575, Aug 29, 1978

Filed:

Jun 13, 1977

Appl. No.:

5/805721

Inventors:

Joseph R. Polizzi - Long Beach CA
Richard K. Hart - Cerritos CA

International Classification:

B62D 2500

US Classification:

296 95C

Abstract:

A quickly removable curtain assembly for covering the inside of a vehicle windshield. The curtain assembly includes an opaque cloth panel for covering the windshield and front side windows of a vehicle such as a recreation vehicle or van.

US Patent:

53527330, Oct 4, 1994

Filed:

Mar 10, 1993

Appl. No.:

8/028966

Inventors:

Richard E. Hart - Irvine CA

Assignee:

R. E. Hart Labs, Inc. - Irvine CA

International Classification:

C08G 1834

US Classification:

524840

Abstract:

A water based, solvent free, two component polyurethane-polyurea dispersion containing up to 65% solids. The first component is a polyester-polyol phase and an aqueous amine phase mixture. The polyester-polyol is a combination of modified polyester-polyols, low viscosity polyether or polyester-polyols, chain extending low molecular weight polyols, neutralizing amines and a detergent. It has a solids content of 90-100% and is totally hydroxyl functional with a carboxylic acid number of 10 and 50, an hydroxyl number of 180 and 300, an equivalent weight range of 165 and 365 and a viscosity of 600-1500 cps at 25. degree. C. The amine phase is an combination of neutralizing and chain extending amines having ratios preformulated to provide a balanced chain extending cross-linking reaction in aqueous phase with--NCO reactive groups. The aqueous amine blend has an equivalent weight of 40 to 50 and a solids content of 40-60%. The polyester-polyol and amine phases are combined in water at room temperature to form a aqueous component having a solids content of 33 to 48% and has an equivalent ratio between polyester-polyol phase and amine phase of 1. 75:1 to 2. 25:2.

US Patent:

56652690, Sep 9, 1997

Filed:

Sep 27, 1994

Appl. No.:

8/312765

Inventors:

Richard E. Hart - Irvine CA

Assignee:

R. E. Hart Labs, Inc. - Irvine CA

International Classification:

C08G 1832

US Classification:

252193

Abstract:

A water based, solvent free, two component polyurethane-polyurea dispersion containing up to 65% solids. The first component is a polyester-polyol phase and an aqueous amine phase mixture. The polyester-polyol is a combination of modified polyester-polyols, low viscosity polyether or polyester-polyols, chain extending low molecular weight polyols, neutralizing amines and a detergent. It has a solids content of 90-100% and is totally hydroxyl functional with a carboxylic acid number of 10 and 50, an hydroxyl number of 180 and 300, an equivalent weight range of 165 and 365 and a viscosity of 600-1500 cps at 25. degree. C. The amine phase is an combination of neutralizing and chain extending amines having ratios preformulated to provide a balanced chain extending cross-linking reaction in aqueous phase with --NCO reactive groups. The aqueous amine blend has an equivalent weight of 40 to 50 and a solids content of 40-60%. The polyester-polyol and amine phases are combined in water at room temperature to form a aqueous component having a solids content of 33 to 48% and has an equivalent ratio between polyester-polyol phase and amine phase of 1. 75:1 to 2. 25:2.