Blocked biuretized isocyanates
US7371807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2004 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | May 3, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is of the formula:wherein R1, R2, R3 and R4 may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl, R5 represents a moiety selected from the group consisting of C1-C10-alkyl and C3-C10-cycloalkyl, and B is a group according to one of the following structural formulaswherein each occurrence of R6, R7, and R8 may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9 is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.