Patent · US Expired

Aqueous preparation of polyamide with catalyst mixture

US5298597A · kind A · utility

15Cited by
2References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 18, 1992
Grant dateMar 29, 1994
Priority date
Expiry dateSep 18, 2012

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G69/28
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A polyamide/copolyamide catalyst composition comprising a primary catalyst which comprises an alkali metal hypophosphite or an alkali-earth metal hypophosphite, and a cocatalyst which comprises an organic salt or an inorganic salt. The catalyst composition of this invention is most useful when used in conjunction with the reactive extrusion technology which requires a very fast polymerization rate to take full advantage of this evolving technology.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.