HCFC blown rigid foams with low thermal conductivity
AssigneeMiles Inc.
InventorHerman P. Doerge
Life of this patent
Estimating the term…
Abstract
Rigid polyurethane foams having low thermal conductivity values are produced by reacting an organic polyisocyanate with an organic material having at least two isocyanate reactive hydrogen atoms and an OH value of from about 200 to about 650 in the presence of a blowing agent. The blowing agent is a mixture of 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123) or dichlorofluoroethane (HCFC-141b) and from about 0.1 to about 1.0% by weight (based on total weight of the foam forming mixture) water. The foams obtained are characterized by a thermal conductivity of less than about 0.130 Btu-in./hr.ft.sup.2.F, preferably less than about 0.120 Btu-in./hr.ft.sup.2.F. These foams are particularly useful as insulation materials.
Claims16
A process for the production of a rigid polyurethane foam having a thermal conductivity of less than about 0.130 Btu-in/hr.ft.sup.2.F comprising reacting
- a) an organic polyisocyanate with
- b) an organic material having at least two isocyanate-reactive hydrogen atoms and an OH value of from about 200 to about 650 which organic material has been prepared with an aromatic amine initiate selected from the group consisting of meta toluene diamine and methane diphenylamine in the presence of
- c) from about 0.1 to about 1.0% by weight water and
- d) 1,1-dichloro-2,2,2-trifluoroethane.
A process for the production of a rigid polyurethane foam having a thermal conductivity of less than about 0.130 But-in./hr.ft..sup.2.F comprising reacting
- a) polymethylene polyphenyl polyisocaynate with
- b) an organic material having at least two isocyanate-reactive hydrogen atoms and an OH value of from about 200 to about 650 which organic material has been prepared with an aromatic amine initiator selected from the group consisting of meta toluene diamine and methane diphenylamine in the presence of
- c) from about 0.1 to about 1.0% by weight water an
- d) a blowing agent selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and dichlorofluoroethane.
A process for the production of rigid polyurethane foam having a thermal conductivity of less than about 0.130 Btu-in./hr.ft..sup.2.F comprising reacting
- a) an organic polyisocyanate with
- b) an organic material having at least two isocyanate-reactive hydrogen atoms and an OH value of from about 200 to about 650 which organic material has been prepared with metatoluene diamine as the initiator in the presence of
- c) from about 0.1 to about 1.0% by weight water and
- d) a blowing agent selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane and dichlorofluorethane.
Dependencies are inferred from the claim text.