Rim compositions using amino acid salt catalysts
US5157057A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jul 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Reaction injection molded (RIM) or structural RIM (SRIM) resins having improved (prolonged) set times, that is, reduced reactivity, may be produced by the addition of an acid blocked amino acid salt catalyst as co-catalyst, or even as a sole catalyst. This permits large molds to be filled completely before cure. However, cure rates are not affected permitting high production rates. The physical properties of RIM and SRIM compositions do not suffer from the addition of these co-catalysts. The amino acid salts may have the formula: ##STR1## where R and R' are independently selected from the group consisting of hydrogen and alkyl having 1 to 12 carbon atoms; where the R" groups are independently alkylene groups having from 1 to 4 carbon atoms; where M is an alkali metal; and where x ranges from 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.