Patent ID: 6664303
Filing Date: 2003-12-16
Classification: C08L

Abstract:
A method of producing an elastomeric alloy that is similar to thermoplastic elastomers using reclaimed rubber or waste rubber, in which the reclaimed rubber and waste rubber which has been converted into powdered rubber is processed with a thermoplastic and at least one stabilizer in various mass ratios by melt-mixing in a mixer to give compounds, wherein at least one polypropylene copolymer or a mixture thereof with at least one polypropylene grade is firstly melted in a mixer and powdered rubber of which at least part has been preswelled in a free-radical donor is metered into the melt,and the powdered rubber is dispersed in the polymer matrix by application of high shear deformations and with mixing-parameter-dependent addition of free-radical-forming agents for phase coupling between the powdered rubber and the polypropylene copolymer or mixture thereof and the dynamic stabilization process is carried out at a mix temperature which is above the melting point range of the polypropylene copolymer or mixture thereof but below the decomposition temperature range of the powdered rubber and at a mixing time which allows reaction of the free-radical former.