Abstract: A resin mixture for forming a stable closed cell foam contains a phenolic resole, a chain extending agent, and as curing agents, a base, and an ester and/or an aliphatic carbonate. The chain extending agent is especially an epoxy resin and/or a phenolic novalak resin.
Type:
Grant
Filed:
April 12, 2002
Date of Patent:
June 8, 2004
Assignee:
Kingspan Industrial Insulation Limited
Inventors:
Mark Stanley Harris, Vincent Coppock, Norman Ryder, Graham Morgan Edgerley
Abstract: A closed cell phenolic foam is formed from a phenolic resin, a blowing agent such as HCFC141b, a catalyst and less than 2.5% by weight relative to the resin of at least one hydrofluoroether or an azeotrope formulation thereof. 1-methoxy-nonafluorobutane and especially an azeotrope formulation thereof with trans-1,2-dichloroethylene are preferred hydrofluoroethers. The phenolic foam has a stable closed cell content of greater than 90% and a stable thermal conductivity.
Type:
Grant
Filed:
September 27, 2001
Date of Patent:
October 29, 2002
Assignee:
Kingspan Industrial Insulation Limited
Inventors:
Mark Stanley Harris, Graham Morgan Edgerley
Abstract: A closed cell phenolic foam is formed from a phenolic resin, a blowing agent such as HCFC141b, a catalyst and less than 2.5% by weight relative to the resin of at least one hydrofluoroether or an azeotrope formulation thereof 1-methoxy-nonafluorobutane and especially an azeotrope formulation thereof with trans-1,2-dichloroethylene are preferred hydrofluoroethers. The phenolic foam has a stable closed cell content of greater than 90% and a stable thermal conductivity.
Type:
Application
Filed:
September 27, 2001
Publication date:
May 23, 2002
Applicant:
Kingspan Industrial Insulation Limited
Inventors:
Mark Stanley Harris, Graham Morgan Edgerley