Mixture of grafted polyamide-block and flexible polyolefin...

C - Chemistry – Metallurgy – 08 – L

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C08L 23/02 (2006.01) C08J 5/18 (2006.01) C08L 23/08 (2006.01) C08L 23/36 (2006.01) C09J 123/02 (2006.01) C09J 123/08 (2006.01) C09J 123/36 (2006.01)

Patent

CA 2393742

The invention concerns a mixture comprising by weight, the total being 100 %, 1 to 100 % of a polyamide block copolymer consisting of a basic polyolefin chain and on an average at least a polyamide graft wherein: the grafts are fixed to the basic chain by the radicals of an unsaturated monomer (X) having a function capable of reacting with a polyamide with amine terminal, the radicals of the unsaturated monomer (X) are fixed to the basic chain by grafting or copolymerisation from its double bond; 99 to 0 % of a flexible polyolefin with elastic modulus in flexure less than 150 MPa at 23 DEG C and having a crystalline melting point ranging between 60 DEG C and 100 DEG C. Said mixtures are useful for making films, tanks, geomembrane protective fabrics produced by extrusion, products obtained by calendering, thermocladding/forming, protective films for electric cables and skins using slush moulding technique.

L'invention concerne un mélange comprenant pour un total de 100% en poids : (a) 1 à 100% en poids d'un copolymère greffé à blocs polyamide constitué d'un tronc en polyoléfine et en moyenne d'au moins un greffon en polyamide, dans lequel les greffons sont attachés au tronc par les restes d'un monomères insaturé ayant une fonction capable de réagir avec un polyamide à extrémité amine, les restes du monomère insaturé étant fixés sur le tronc par greffage ou copolymérisation depuis sa double liaison; et (b) 99 à 0% en poids d'une polyoléfine souple de module élastique en flexion inférieur à 150 MPa à 23°C et présentant un point de fusion cristalline compris entre 60 et 100°C. Ces mélanges sont utiles pour faire des adhésifs, des films, des bâches, des géomembranes fait par extrusion, calandrage ou thermogainage/formage, des couches de protection de câbles électriques et des peaux selon la technique du slush molding.

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