Compositions – Ammonia – alkali or base – bindant containing
Patent
1994-09-27
1997-09-09
Gorr, Rachel
Compositions
Ammonia, alkali or base, bindant containing
25218226, 25218227, 524839, 524840, 528 71, C08G 1832
Patent
active
056652690
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. The second component is a 100% solids aliphatic isocyanate having a viscosity of between 1000-3500 cps at 25.degree. C. and provides an NCO to functional groups in the polyester-polyol/amine component ratio of between about 1:1.3 to 1:1.7. This solvent free dispersion dries to a film coating having properties equal to conventional solvent based polyurethane coatings.
REFERENCES:
patent: 4876302 (1989-10-01), Noll et al.
Gorr Rachel
Leach Michael
Marsh William F.
R. E. Hart Labs, Inc.
LandOfFree
Water based, solvent free, two component aliphatic polyurethane does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water based, solvent free, two component aliphatic polyurethane , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water based, solvent free, two component aliphatic polyurethane will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-67092