Patent · US Expired

Formation of discrete polyalkylene carbonate particles by solvent/non-solvent precipitation

US4975525A · kind A · utility

4Cited by
9References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 27, 1989
Grant dateDec 4, 1990
Priority date
Expiry dateMar 27, 2009

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08J2369/00
  • WIPO fieldOther special machines
  • WIPO sectorMechanical engineering

Abstract

Discrete, non-agglomerating particles of polyalkylene carbonate are produced by solvent/non-solvent precipitation using certain solvent/non-solvent systems. The free-flowing particles obtaine are from 30 to 3000 microns in diameter and are suitable for use in a variety of applications, particularly the preparation of foamed articles.

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