Rigid polyurethane foams

Claim 2

IN A METHOD OF MAKING RIGID POLYURETHANE FOAMS WHEREIN A HALOGEN-SUBSTITUTED ALKANE IS INCORPORATED WITH A POLYESTER AND WITH AN ORGANIC POLYISOCYANATE AND WHEREIN THE TEMPERATURE OF THE MIXTURE IS PERMITTED TO RISE DURING THE ENSUING ACTION TO PRODUCE A RIGID POLYURETHANE FOAM, THE IMPROVEMENT WHICH CONSISTS IN UTILIZING AS THE POLYESTER COMPONENT, AN ESTERIFICATION REACTION PRODUCT OF (A) POLYCARBOXYLIC ACID COMPONENT OF WHICH AROMATIC DICARBOXYLIC ACID CONSTITUTES AT LEAST 25% BY WEIGHT, WITH (B) AN ETHYLENE OXIDE ADDUCT OF AN ALIPHATIC POLYHYDRIC ALCOHOL, SAID ALIPHATIC POLYHYDRIC DALCOHOL CONTAINING FROM 3 TO 6 HYDROXYL GROUPS, SAID ADDUCT CONTAINING, FOR EACH MOL OF SAID ALIPHATIC POLYHYDRIC ALCOHOL, SUCH A NUMBER OF MOLS OF ETHYLENE OXIDE WHEREBY SAID ADDUCT CONTAINS FROM 10 TO 22 MILLIEQUIVALENTS, PER GRAM, OF HYDROXYL GROUPS, SAID POLYESTER HAVING AN HYDROXYL NUMBER BETWEEN ABOUT 280 AND ABOUT 550.

Claim 3

IN A METHOD OF MAKING RIGID POLYURETHANE FOAMS WHEREIN A HALOGEN-SUBSTITUTED ALKANE IS INCORPORATED WITH A POLYESTER AND WITH AN ORGANIC POLYISOCYANATE AND WHEREIN THE TEMPERATURE OF THE MIXTURE IS PERMITTED TO RISE DURING THE ENSUING ACTION TO PRODUCE A RIGID POLYURETHANE FOAM, THE IMPROVEMENT WHICH CONSISTS IN UTILIZING, AS THE POLYESTER COMPONENT, AN ESTERIFICATION REACTION PRODUCT CONSISTING ESSENTIALLY OF (A) A MIXTURE OF A DICARBOXYLIC ACID COMPONENT AND A WATER-IMMISCIBLE HIGHER MOLECULAR WEIGHT FATTY ACID, WITH (B) A MEMBER SELECTED FROM THE GROUP OF ALKYLENE EXIDE ADDUCTS CONSISTING OF (1) ETHYLENE OXIDE ADDUCTS OF ALIPAHTIC POLYHYDRIC ALCOHOLS AND (2) MIXED ETHYLENE OXIDE AND PROPYLENE OR BUTYLENE OXIDE ADDUCTS OF ALIPHATIC POLYHYDRIC ALCOHOLS THE MOL RATIO OF THE ETHYLENE OXIDE TO THE PROPYLENE OR BUTYLENE OXIDE BEING AT LEAST 2 TO 1, SAID ALIPHATIC POLYHYDRIC ALCOHOLS CONTAINING AT LEAST 3 HYDROXY GROUPS, SAID ADDUCT CONTAINING, FOR EACH MOL OF SAID ALIPHATIC POLYHYDRIC ALCOHOL, SUCH A NUMBER OF MOLS OF SAID ALKYLENE OXIDE WHEREBY SAID ADDUCT CONTAINS FROM 10 TO 22 MILLIEQUIVALENTS, PER GRAM OF HYDROXYL GROUPS, SAID POLYESTER HAVING AN HYDROXYL NUMBER BETWEEN 400 AND 600.

Claim 4

IN A METHOD OF MAKING RIGID POLYURETHANE FOAMS WHEREIN A HALOGEN-SUBSTITUTED ALKANE IS INCORPORATED WITH A POLYESTER AND WITH AN ORGANIC POLYISOCYANATE AND WHEREIN THE TEMPERATURE OF THE MIXTURE IS PERMITTED TO RISE DURING THE ENSUING ACTION TO PRODUCE A RIGID POLYURETHANE FOAM, THE IMPROVEMENT WHICH CONSISTS IN UTILIZING, AS THE POLYESTER COMPONENT, AN ESTERIFICATION REACTION PRODUCT CONSISTING ESSENTIALLY OF (A) A MIXTURE OF A DICARBOXYLIC ACID COMPONENT AND A WATER-IMMISCIBLE HIGHER MOLECULAR WEIGHT FATTY ACID, WITH (B) A MEMBER SELECTED FROM THE GROUP OF ALKYLENE EXIDE ADDUCTS CONSISTING OF (1) ETHYLENE OXIDE ADDUCTS OF ALIPAHTIC POLYHYDRIC ALCOHOLS AND (2) MIXED ETHYLENE OXIDE AND PROPYLENE OR BUTYLENE OXIDE ADDUCTS OF ALIPHATIC POLYHYDRIC ALCOHOLS THE MOL RATIO OF THE ETHYLENE OXIDE TO THE PROPYLENE OR BUTYLENE OXIDE BEING AT LEAST 2 TO 1, SAID ALIPHATIC POLYHYDRIC ALCOHOLS CONTAINING AT LEAST 3 HYDROXY GROUPS, SAID ADDUCT CONTAINING, FOR EACH MOL OF SAID ALIPHATIC POLYHYDRIC ALCOHOL, SUCH A NUMBER OF MOLS OF SAID ALKYLENE OXIDE WHEREBY SAID ADDUCT CONTAINS FROM 10 TO 22 MILLIEQUIVALENTS, PER GRAM OF HYDROXYL GROUPS, SAID POLYESTER HAVING AN HYDROXYL NUMBER BETWEEN 400 AND 600.