THERMOPLASTIC ELASTOMER COMPOSITION WITH HIGH MELT STRENGTH FOR MAKING MOULDED ELASTIC OBJECTS, METHOD OF PRODUCING SAID COMPOSITION, PREMIX, USED AS HOMOGENEOUS ADDITIVE FOR STRAIN HARDENING OF MELT FOR PRODUCING COMPOSITION, METHOD OF PRODUCING PREMIX, MOULDED FLEXIBLE THERMOPLASTIC ELASTOMER OBJECT AND METHOD OF MAKING SAID OBJECT Russian patent published in 2009 - IPC C08L23/00 C08L101/00 C08L53/02 C08L67/02 C08L75/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a thermoplastic elastomer composition with high melt strength, to a method of making moulded elastomer objects and to moulded elastomer objects, made from the said composition. The composition contains at least one linear crystalline polyolefin and at least one compatible thermoplastic elastomer or a mixture of one or more styrene block copolymers with a thermoplastic and/or plasticiser. The polyolefin has melting point of at least 100° C and polydispersity index (PI) greater than 20, determined through isothermal dynamic frequency sweep at 190°C and calculated from the equation PI = 100000/Gc, where Gc is expressed in pascals and is the modulus at the point of intersection (Gc=G'=G"), and the thermoplastic elastomer or mixture has compression set below 50%, determined at ambient temperature 24 hours after compression on ASTM D395-03.

EFFECT: obtaining a composition which can be used in processes which include a stage for unsupported stretching while the composition is molten, such as foaming, film blowing, fibre drawing, blow moulding, profile extrusion and hot moulding.

17 cl, 6 ex, 9 tbl