Epoxy surfacer cements containing polyamine-ketimine mixtures
US4148950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1978 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Apr 7, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Room temperature curable epoxy compositions and method are disclosed. The compositions comprise resinous epoxide; a mixed amine-ketimine curing agent comprising a cyclic polyamine having at least two epoxide-reactive, aliphatic amino functional groups, a portion of the amino functional groups in the mixed curing agent being in ketimine form the remainder being in the free amine form; and water in at least about the stoichiometric proportion for hydrolyzing the ketimine groups to the free amine form. The compositions may also comprise inorganic filler such as finely divided silica and sand. The ingredients of the composition are mixed to form a sprayable composition. The working life, or pot life, of the composition can be controlled without excessively affecting the working viscosity or sprayability of the composition by varying the ratio of free amine to ketimine groups in the mixed curing agent and varying the proportion of water in the composition to maintain at least the stoichiometric proportion for hydrolyzing the ketimine groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.