e atmospheric pressure conditions however so long as molding conditions are not attained the pressure can be lower than atmospheric as well as higher even as high as up to 2 000 pounds per square inch gauge 13 9 mpa pressure time and temperature limitations will be governed to some extent by the activity and initial stability of the curable mixture components employed in general it appears that the precure stabilizes the polycarboxylic acids against premature loss of carboxy groups the preferred precure conditions for most curable compositions prepared according to the present invention will include ambient pressure temperatures of about 100 u00b0 to about 130 u00b0 c and a heating time of from about 0 5 to about 2 hours once precure has been carried out the moldable resin compositions produced are capable of withstanding relatively wide extremes of temperature handling and storage conditions without deterioration this will enable the moldable compositions produced according to the present invention to be packaged and stored for later use alternatively the precured moldable mixture obtained as outlined above may be subjected directly to suitable molding conditions in either event it has been found critical in order to produce acceptable molded resin products that the molding conditions be defined within the following parameters the temperature must be in the range of about 170 u00b0 to about 220 u00b0 c preferably in the range of from about 190 u00b0 to about 210 u00b0 c the molding pressure dependent to some extent upon the particular ingredients of the composition and the degree of precure should be in the range of about 200 to about 20 000 per square inch gauge 1 39 to 139 mpa preferably from about 2.