Patent ID: 8779060
Filing Date: 2014-07-15
Classification: C08F,C08L,C09D,C09J

Abstract:
1. A mixture consisting of, per 100 parts by weight of (A)+(B): (A) 10 to 90 parts by weight of at least one non-nanostructured olefinic thermoplastic polymer; (B) 90 to 10 parts by weight of a formulation of at least one elastomer which has unsaturated double bonds and is capable of reacting with a crosslinking or vulcanizing agent, said formulation including a system for crosslinking or vulcanizing said elastomer or elastomers, at least one plasticizer, and other additives; (C) 10 to 100 parts by weight, relative to (A)+(B), of at least one graft copolymer having polyamide blocks, said copolymer being composed of a polyolefin backbone and of on average at least 1.3 polyamide grafts on said backbone, and having a nanostructured organization, in which said grafts are attached to the backbone by the residues of an unsaturated monomer (X) having a function which is capable of reacting with an amino-terminal polyamide; and the residues of said unsaturated monomer (X) being attached to the backbone by grafting or copolymerization from its double bond, it being possible for (A) and (B) in the mixture to have already being combined together by the dynamic vulcanizing or crosslinking process, to give a vulcanized or crosslinked thermoplastic composition, wherein said polyamide grafts have a number-average molar mass of less than 5000 g/mol, wherein the copolymer having polyamide blocks has a nanostructured organization with polyamide lamellae having a thickness of between 10 and 50 nanometers, or with an elastic modulus, measured by thermomechanical analysis at a frequency of 1 Hz on a Rheometrics dynamic rheometer, of more than 0.5 MPa, at the center of the range between the melting point of the polyolefin backbone and the melting point of the polyamide graft, when the melting point of the polyolefin backbone is less by at least 40° C. than that of the polyamide graft, wherein the additives are selected from the group consisting of pulverulent inorganic fillers, zinc oxides and titanium oxides, carbon blacks, kaolins, silicas, pigments, coupling agents, antidegradants, processing additives, stearates, and waxes, and represent 10 to 150 phr of constituent (B).