Patents Assigned to Harry Fischer - Justia Patents Search

Patents Assigned to Harry Fischer

Fire retardant for isocyanate-based foams comprising ammonium sulfate and a cyanuric acid derivative

Patent number: 4908161

Abstract: Ammonium sulfate powder is employed, alone, or in conjunction with a weakly basic powder to neuturalize the acidity of the sulfate, as a flame retardant for isocyanate-based foams and, in particular, rigid and flexible polyurethane foams.

Type: Grant

Filed: June 23, 1988

Date of Patent: March 13, 1990

Assignee: Harry Fischer

Inventor: Kaneyoshi Ashida