Patents Assigned to Henderson's Industries Limited - Justia Patents Search

Patents Assigned to Henderson's Industries Limited

Polyether-based polyurethane foams including a flame-retardant system containing antimony trioxide, a chlorinated paraffin and alumina trihydrate and method of preparation

Patent number: 4266042

Abstract: Polyether-based polyurethane foams including as the flame-retardant, an antimony compound, chlorine derived from at least one chlorinated paraffin and alumina trihydrate, and the polyol used to prepare the foams being a diol- or triol-based polyol wherein at least 50% of the hydroxyl end groups are primary hydroxyl end groups, having good flame-retardancy and without any significant fall-off in physical properties as the foams are able to tolerate relatively high levels of the flame retardant.

Type: Grant

Filed: June 27, 1979

Date of Patent: May 5, 1981

Assignee: Henderson's Industries Limited

Inventor: Ronald S. Park