Low NMP aqueous polyurethane composition with a diluent
US7683139B2 · kind B2 · utility
5Cited by
5References
27Claims
0Family size
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Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Jun 28, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous composition with a sediment content <5%, comprising a polyurethane dispersion wherein the polyurethane has an acid value in the range of from 25 to 65 mgKOH/g and comprises (i) 36 to 60 wt % of at least one aromatic polyisocyanate and where the polyurethane is prepared in the presence of (a) <5 wt % of 1-methyl-2-pyrrolidinone by weight of the polyurethane, (b) at least one diluent and (c) water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.