Patent · US Expired

Isocyanate terminated quasi-prepolymers useful for preparing polyurethane/polyisocyanurate foams having low thermal conductivity

US4888365A · kind A · utility

9Cited by
11References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 16, 1988
Grant dateDec 19, 1989
Priority date—
Expiry dateSep 16, 2008

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G2110/0025
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Polyurethane/polyisocyanurate rigid foams having low thermal conductivity are prepared from isocyanate-terminated quasi-prepolymers prepared from polyester polyols derived from phthalic anhydride or from the transesterification of polyethylene terephthalate scrap.

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