Method for producing aqueous carbodiimide-containing liquid
US11926694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2019 |
| Grant date | Mar 12, 2024 |
| Priority date | — |
| Expiry date | Jun 13, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a method for producing an aqueous carbodiimide having excellent crosslinking reactivity with a crosslinking group, such as an alcoholic hydroxy group of an aqueous resin. The method for producing an aqueous carbodiimide-containing liquid includes a step (1) of mixing an isocyanate group-containing carbodiimide (A), a terminal blocking agent, and at least one organic metal compound selected from an organic titanium compound, an organic zirconium compound, and an organic aluminum compound and allowing them to react with each other, to obtain a terminal-blocked carbodiimide (B) in which the isocyanate group is blocked with the terminal blocking agent; and a step (2) of dissolving or dispersing the terminal-blocked carbodiimide (B) in an aqueous solvent, to obtain an aqueous carbodiimide-containing liquid, wherein the terminal blocking agent contains a hydrophilic compound (X) having a functional group having reactivity with the isocyanate group and a hydrophilic group other than the functional group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.