Treatment of reclaimed rubber

Claim 1

THE METHOD OF IMPROVING THE NON-STAINING PROPERTIES OF A RECLAIMED SCRAP VULCANZIED RUBBER, THE RUBBER CONTENT OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF SYNTHETIC RUBBER AND MIXTURES OF SYNTHETIC RUBBER WITH UP TO 95% BY WEIGHT OF SUCH MIXTURES OF NATURAL RUBBER, WHICH COMPRISES SUBJECTING SAID RECLAIMED RUBBER, AFTER IT HAS BEEN RECLAIMED, TO TREATMENT AT TEMPERATURES IN THE RANGE FRO, 60*F. TO LESS THAN 300*F. WITH A CHEMICAL IN THE FREE STATE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE, PARAFORMALDEYDE, METHYLAL, ACETALDEHYDE, PARALDEHYDE. ACROLEIN, CHLORAL AND ALDOL. THEREBY FORMING IN-SITU NON-STAINING REACTION PRODUCTS OF NORMALLY STAINING ACCELERATOR AND ANTIOXIDANT INGREDIENTS OF THE RECLAIM WITH SAID CHEMICAL, SAID SYNTHETIC RUBBER BEING SELECTED FROM THE GROUP CONSISTING OF HOMOPOLYMERS OF BUTADIENES-1,3 COPOLYMERS OF MIXTURES CONTAINING BUTADIENES-1,3 WITH UP TO 70% OF SUCH MIXTURES OF COMPOUNDS WHICH CONTAIN A CH2=C< GROUP AND ARE COPOLYMERIZABLE WITH NUTADIENTS-1,38 AND COPOLYMERS OF A MAJOR PROPORTION OF AN ISOOLEFIN AND A MINOR PROPORTION OF A CONJUGATED DIENE.