Patent ID: 6372807
Filing Date: 2002-04-16
Classification: C08J,Y02W

Abstract:
A process for the conversion of a crushed mixed plastic waste by means of heat treatment and mechanical mixing, optionally in the presence of a plasticizer, said process comprisingheating a crushed mixed plastic waste starting mixture to a temperature between 150Â° C. and 250Â° C. in the presence of at least 20% by weightâ€”based on the amount of the plastic wasteâ€”of low density polyethylene having a softening point lower than 150Â° C. and 5 to 40% by weightâ€”based and on the amount of the plastic wasteâ€”of a mineral oil having an open cup flash point higher than 220Â° C. in a stirring-kneading apparatus, exerting intense breaking and shearing forces while heating, to the mixture and keeping the period of intense heat and mechanical treatment in the apparatus until both the rate of power input of the kneading machine and the temperature of the mass become stable and a degradation of the plastic mixture takes place whereby a quasi-homogeneous liquid phase or melt phase product is formed in a colloidal state.