Aqueous polyurethane - polyolefin compositions
US4644030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/67
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Method of making a stable aqueous dispersion of polymeric material comprising: PA1 (A) producing an NCO-terminated polyurethane prepolymer in the presence of inert liquid polymerizable ethylenically unsaturated monomer material, PA1 (B) dispersing the product from A in water, PA1 (C) chain-extending the prepolymer in the resulting aqueous dispersion, and PA1 (D) subjecting the aqueous dispersion from C to vinyl addition polymerization conditions to polymerize said monomer material in situ, the weight ratio of chain extended polyurethane to said monomer material being about 9:1 to about 1:9., the resulting aqueous dispersions, and their use for making films, sheets and other products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.