Process of molding a mixture of at least two fiber forming linear condensation products, at least one of which products contains a high temperature thickening agent

Claim 1

A PROCESS FOR THE MANUFACTURE OF OBJECTS HAVING A FLAMED PATTERN ACCORDING TO THE INJECTION MOLDING METHOD, CONSISTING OF MIXING AT LEAST TWO DIFFERENT GROUPS OF GRANULES CONSISTING OF HIGH MOLECULAR WEIGHT FIBER-FORMING LINEAR POLYCONDENSATION PRODUCTS OF THE SAME CHEMICAL NATURE, THE GRANULES OF AT LEAST ONE BUT LESS THAN ALL THE GROUPS CONTAINING IN PHYSICAL ADMIXTURE THEREWITH A SMALL BUT EFFECTIVE AMOUNT, UP TO A MAXIMUM OF 2% BY WEIGHT OF SAID POLYCONDENSATION PRODUCT, OF A HIGH TEMPERATURE THICKENING AGENT SELECTED FROM THE CLASS CONSISTING OF TRIBUTYL PHOSPHITE, DIETHYL PHOSPHITE, DIBUTYL PHOSPHITE, TRICHLOROETHYL PHOSPHITE, TRIPHENYL PHOSPHITE, DITHEYL B-CHLOROETHYL PHOSPHATE, PHENY DI-P-CHLOROPHENYL PHOSPHATE, TRICHLOROETHYL PHOSPHATE, TRICHLOROPROPYL PHOSPHATE, ETHYL DI-B-CHLOROETHYL PHOSPHATE, TETRAETHYL PYROPHOSPHATE, AND DI-B-CHLOROETHYL VINYLPHOSPHONATE, SAID HIGH TEMPERATURE THICKENING AGENT WHEN PRESENT IN THE SAME PROPORTION HAVING NO APPRECIABLE EFFECT ON SAID POLYCONDENSATION PRODUCT AT ORDINARY ROOM TEMPERATURE BUT SO THICKENING, IN MOLTEN CONDITION, THE SAME POLYCONDENSATION PRODUCT CONTAINING UP TO A MAXIMUM OF 2.5% BY WEIGHT OF WATER-SOLUBLE COMPONENTS, THAT THE RATIO BETWEEN THE FLOW RATE, DETERMINED BY MEANS OF THE EXTRUSION PLASTOMETER ACCORDING TO A.S.T.M.D. 123852T, OF THE SAME BUT UNMIXED, POLYCONDENSATION PRODUCT AND THE FLOW RATE OF THE POLYCONDENSATION PRODUCT MIXED WITH THE HIGH TEMPERATURE THICKENING AGENT AMOUNTS TO AT LEAST 1.5, SAID LINEAR POLYCONDENSATION PRODUCT MIXED SELECTED FROM THE CLASS CONSISTING OF LONG-CHAIN SYNTHETIC LINEAR POLYAMIDES WHICH HAVE RECURRING AMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND LINEAR POLYURETHANES, AND THEN SUBJECTING TO INJECTION MOLDING AT TEMPERATURES ABOVE THEIR MELTING POINTS THE RESULTING PHYSICAL MIXTURE OF FRANULES OF SAID POLYCONDENSATION PRODUCT HAVING NO HIGH TEMPERATURE THICKENING AGENT AND GRANULES OF SAID POLYCONDENSATION PRODUCT HAVING SAID HIGH TEMPERATURE THICKENING AGENT IN ADMIXTURE THEREWITH, THEREBY OBTAINING INJECTION-MOLDED PRODUCTS HAVING A FLAMED PATTERN WHILE AT THE SAME TIME AT LEAST GREATLY MINIMIZING DIFFICULTIES DUE TO RAPID CHANGES IN PLASTICITY OF SAID HIGH MOLECULAR WEIGHT LINEAR POLYCONDENSATION PRODUCTS PER SE ON MELTING.