Low NMP aqueous polyurethane composition with reactive diluent
US7951457B2 · kind B2 · utility
5Cited by
9References
27Claims
0Family size
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Key dates
| Filing date | Jun 28, 2005 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Jul 26, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31989
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aqueous composition comprising a polyurethane dispersion with a sediment content ≦5%, 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 and (b) at least one reactive diluent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.