Rapid setting polyurethanes from diols and polyfunctional polyisocyanates prepared in the presence of carboxylic acid esters

Claim 1

A RIGID, NON-CELLULAR COMPOSITION HAVING A DENSITY OF AT LEAST ABOUT 1 GRAM/CC WHICH IS DEMOLDABLE, WITHOUT THE APPLICATION OF AN EXTERNAL SOURCE OF HEAT, WITHIN ABOUT 5 MINUTES AFTER ADMIXTURE OF THE COMPONENTS OF THE COMPOSITION WHICH IS THE REACTION PRODUCT OF A POLYURETHANE-FORMING COMPOSITION COMPRISING A. A DIHYDROXYL-CONTAINING COMPOUND HAVING A HYDROXYL EQUIVALENT WEIGHT OF LESS THAN ABOUT 250; B. AN ORGANIC POLYISOCYANATE HAVING AN NCO FUNCTIONALITY OF AT LEAST ABOUT 2.5; C. A LIQUID MODIFIER COMPOUND HAVING A BOILING POINT OF AT LEAST ABOUT 150*C OR MIXTURE OF SUCH COMPOUNDS AND WHICH MODERATES THE REACTION EXOTHERM BETWEEN COMPONENTS (A), (B) AND (D) WITHOUT SUBSTANTIAL REACTION THEREWITH SELECTED FROM ESTERS OF CARBOXYLIC ACIDS OR MIXTURES THEREOF; AND D. AN ORGANOMETALLIC CATALYST; WHEREIN COMPONENTS (A) AND (B) ARE PRESENT IN QUANTITIES SUCH THAT THE NCO:OH RATIO IS FROM ABOUT 0.8:1 TO ABOUT 1.5:1, COMPONENT (C) IS PRESENT IN QUANTITIES OF FROM ABOUT 10 TO ABOUT 50 PERCENT BY WEIGHT OF THE COMBINED WEIGHTS OF COMPONENTS (A), (B) AND (C); AND COMPONENT (D) IS PRESENT IN QUANTITIES OF FROM ABOUT 0.1 TO ABOUT 10.0 PERCENT BY WEIGHT OF THE COMBINED WEIGHT OF COMPONENTS (A9, (B) AND (C).