Aqueous polyurethane dispersion adhesive compositions with improved heat resistance
US5608000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1994 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Sep 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aqueous dispersion adhesives of anionic polyurethanes which have high heat resistance and low activation temperature, even when employed without addition of a crosslinker. The polyurethane is the reaction product of an isocyanate terminated polyurethane prepolymer, and a chain extender. The polyurethane prepolymer is the reaction product of a polyol component and a diisocyanate component, the polyol component including: PA1 a sulfonated polyester polyol, PA1 a hydroxy carboxylic acid of the formula: EQU (HO).sub.x R(COOH).sub.y PA1 wherein (R) represents a straight or branched, hydrocarbon radical containing 1 to 12 carbon atoms, and x and y represent values from 1 to 3, and PA1 a low molecular weight aliphatic diol having a molecular weight of from 60 to 400.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.