Process for producing large-size formed articles consisting of a modified polyamide
US5205975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1990 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Mar 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/61
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing large-size formed articles consisting of a modified polyamide, by polymerization of a mixture containing, besides the omega-lactam corresponding to the polyamide, the following reagents: PA0 a) a polymerization catalyst selected from the sodium salt and the potassium salt of said omega-lactam; PA0 b) a polyoxyalkylene polyamine having a molecular weight ranging from 400 to 5,000 and an amine functionality ranging from 1.9 to 2.5; PA0 c) an activator consisting of a polyisocyanate having all the isocyanic groups blocked with a lactam; said reagents being fed, at a temperature of from 105.degree. to 125.degree. C., to a mold heated to 130.degree.-170.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.