(WO9747673-A1)      A process for the production of rigid polyurethane (PUR) foam with low thermal conductivity, comprises reacting (A) a polyol component with (B) a polyisocyanate or modified polyisocyanate with an NCO content of 20-48 wt%.    (A) contains: (1) polyester-polyol(s) with a mol.wt. of 100-30,000 and at least two isocyanate-reactive hydrogen atoms; (2) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms and at least one tertiary nitrogen atom; (3) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms; (4) catalysts; (5) water; (6) blowing agents; and optionally (7) additives, etc..    USE -   Used as interlayers for composite elements and for foaming-in-place (claimed). Applications especially include insulating refrigerators, and also insulating heating pipes or containers.    ADVANTAGE -   Enables the production of hydrocarbon-blown PUR foam with a thermal conductivity as low as that of trichlorofluoromethane- or low trichlorofluoromethane-blown foam.    (EP904309-A1)      A process for the production of rigid polyurethane (PUR) foam with low thermal conductivity, comprises reacting (A) a polyol component with (B) a polyisocyanate or modified polyisocyanate with an NCO content of 20-48 wt%.    (A) contains: (1) polyester-polyol(s) with a mol.wt. of 100-30,000 and at least two isocyanate-reactive hydrogen atoms; (2) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms and at least one tertiary nitrogen atom; (3) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms; (4) catalysts; (5) water; (6) blowing agents; and optionally (7) additives, etc..    USE -   Used as interlayers for composite elements and for foaming-in-place (claimed). Applications especially include insulating refrigerators, and also insulating heating pipes or containers.    ADVANTAGE -   Enables the production of hydrocarbon-blown PUR foam with a thermal conductivity as low as that of trichlorofluoromethane- or low trichlorofluoromethane-blown foam.    (CN1221433-A)      A process for the production of rigid polyurethane (PUR) foam with low thermal conductivity, comprises reacting (A) a polyol component with (B) a polyisocyanate or modified polyisocyanate with an NCO content of 20-48 wt%.    (A) contains: (1) polyester-polyol(s) with a mol.wt. of 100-30,000 and at least two isocyanate-reactive hydrogen atoms; (2) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms and at least one tertiary nitrogen atom; (3) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms; (4) catalysts; (5) water; (6) blowing agents; and optionally (7) additives, etc..    USE -   Used as interlayers for composite elements and for foaming-in-place (claimed). Applications especially include insulating refrigerators, and also insulating heating pipes or containers.    ADVANTAGE -   Enables the production of hydrocarbon-blown PUR foam with a thermal conductivity as low as that of trichlorofluoromethane- or low trichlorofluoromethane-blown foam.    (JP2000511957-W)      A process for the production of rigid polyurethane (PUR) foam with low thermal conductivity, comprises reacting (A) a polyol component with (B) a polyisocyanate or modified polyisocyanate with an NCO content of 20-48 wt%.    (A) contains: (1) polyester-polyol(s) with a mol.wt. of 100-30,000 and at least two isocyanate-reactive hydrogen atoms; (2) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms and at least one tertiary nitrogen atom; (3) compounds with a mol.wt. of 150-12,500 containing at least two NCO-reactive H atoms; (4) catalysts; (5) water; (6) blowing agents; and optionally (7) additives, etc..    USE -   Used as interlayers for composite elements and for foaming-in-place (claimed). Applications especially include insulating refrigerators, and also insulating heating pipes or containers.    ADVANTAGE -   Enables the production of hydrocarbon-blown PUR foam with a thermal conductivity as low as that of trichlorofluoromethane- or low trichlorofluoromethane-blown foam.