Patents Assigned to R. E. Hart Labs, Inc.
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Patent number: 5693703Abstract: 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 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.Type: GrantFiled: March 12, 1996Date of Patent: December 2, 1997Assignee: R. E. Hart Labs, Inc.Inventor: Richard E. Hart
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Patent number: 5665269Abstract: 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%.Type: GrantFiled: September 27, 1994Date of Patent: September 9, 1997Assignee: R. E. Hart Labs, Inc.Inventor: Richard E. Hart
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Patent number: 5508340Abstract: 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.Type: GrantFiled: September 9, 1994Date of Patent: April 16, 1996Assignee: R. E. Hart Labs, Inc.Inventor: Richard E. Hart
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Patent number: 5472634Abstract: 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%.Type: GrantFiled: September 27, 1994Date of Patent: December 5, 1995Assignee: R. E. Hart Labs, Inc.Inventor: Richard E. Hart
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Patent number: 5352733Abstract: 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%.Type: GrantFiled: March 10, 1993Date of Patent: October 4, 1994Assignee: R. E. Hart Labs, Inc.Inventor: Richard E. Hart