Polymeric composition
US9994730B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a radiation curable aqueous coating composition comprising a dispersion of a chain extended polyurethane which dispersion comprises (a) a polyurethane-urea polymer comprising (i) acryloyl groups present in an amount of at least 2.0 mmol per g of the polyurethane-urea polymer; and (ii) urea groups present in an amount of at least 0.35 milli-equivalents (meq) per g of the polyurethane-urea polymer; (b) optionally a multifunctional ethylenically unsaturated compound unreactive towards isocyanates, in an amount, where present, of up to 40% by weight of components (a) and (b); and (c) a neutralizing agent; where the polyurethane-urea polymer (component (a)) is obtained by (I) the reaction of at least the following polyurethane precursors: at least one polyisocyanate (a1), two or more polyols (a2) and at least one isocyanate reactive compound (a3) to obtain a polyurethane prepolymer, where the isocyanate and hydroxy groups on the polymer precursors (a1), (a2) and (a3) are present in a respective mole ratio (NCO to OH) of at least 1.35, and (II) by reacting the polyurethane prepolymer with an active hydrogen chain extending compound and optionally with wat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.