摘要:
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 °C and having a crystalline melting point ranging between 60 °C and 100 °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.
摘要:
The invention relates to a composition based on an impact-resistant thermoplastic polyamide resin, comprising as a blend: - from 60 to 98 wt% of polyamide resin (A) and - from 2 to 40 wt% of a blend of at least one graft copolymer with polyamide blocks (B) composed of a polyolefin backbone and at least one polyamide graft in which the grafts are attached to the backbone by the residues of an unsaturated monomer (X) having a functional group capable of reacting with an amine-terminated polyamide, the residues of the unsaturated monomer (X) being attached to the backbone by grafting or copolymerization through its double bond, and a non-reactive ethylene polymer (C) that is miscible with (B) and has a density below 0.960 g/cm3. This composition has improved impact resistance properties and also a satisfactory fluidity. The invention also relates to the process of obtaining said composition and also to its use for manufacturing products or parts obtained by injection moulding or extrusion.
摘要:
The mixture of the invention contains, for 100 parts in weight: (A) 10 to 90 parts in weight of at least one copolymer grafted to polyamide blocks, said copolymer comprising a polyolefine trunk and at least 1.3 polyamide grafts on said trunk in average and having a nano-structured organisation, wherein said grafts are attached to the trunk by the rest of an unsaturated monomer (X) having a function capable of reacting with a polyamide with an amine end, the rest of said monomer (X) being attached on the trunk by grafting or copolymerisation from the double bond thereof, (A) optionally including at least one non-grafted polyolefine in a proportion such that the nano-structured organisation of the compound (A) is preserved; and (B) 90 to 10 parts in weight of a formulation of at least one elastomer having unsaturated double bonds and capable of reacting with a cross-linking or vulcanisation agent, said formulation containing a cross-linking or vulcanisation system of said elastomer(s), at least one plasticizer and the standard additives present in elastomer formulations.
摘要:
The mixture of the invention contains, for 100 parts in weight of (A) + (B): (A) 10 to 90 parts in weight of at least one non-nanostructured olefinic thermoplastic polymer; (B) 90 to 10 parts in weight of a formulation of at least one elastomer having unsaturated double bonds and capable of reacting with a cross-linking or vulcanisation agent, said formulation containing a cross-linking or vulcanisation system of said elastomer(s), at least one plasticizer and the standard additives present in elastomer formulations; (C) up to 100 parts in weight relative to (A) + (B) of at least one copolymer grafted with polyamide blocks, said copolymer comprising a polyolefine trunk and at least 1.3 polyamide grafts on said trunk in average and having a nano-structured organisation, wherein said grafts are attached to the trunk by the rest of an unsaturated monomer (X) having a function capable of reacting with a polyamide with an amine end, the rest of said unsaturated monomer (X) being attached on the trunk by grafting or copolymerisation from the double bond thereof, and wherein (A) and (B) in the mixture can already have been combined together by the cross-linking or vulcanisation dynamic method in order to provide a cross-linked or vulcanised thermoplastic composition.
摘要:
The invention features a thermoplastic composition comprising at least one matrix forming polymer (M) in which are dispersed nodules of at least one polymer (K) encapsulated in at least one polymer (S) such that these encapsulated nodules are smaller than the polymer nodules (S) dispersed in the matrix (M).
摘要:
The invention relates to a structure comprising a substrate and at least one first layer applied to the substrate made from a thermoplastic composition with at least one functionalised thermoplastic obtained by copolymerisation or grafting of a polyolefin backbone with an unsaturated monomer with an anhydride, acid or epoxide function, the functionalised polyolefin being grafted by polyether groups with a terminal amine by means of reactive extrusion. Said structure is a breathable waterproof material with water vapour permeability of at least 300 g/m224 h-1 measured by the standard ASTM E96, method BW (38°C/50 % relative humidity), for a film of 25 μm. The invention further relates to the use of such a composition as a breathable waterproof material with water vapour permeability of at least 300 g/m224 h-1 measured by the standard ASTM E96, method BW (38°C/50 % relative humidity), for a film of 25 μm.
摘要:
The invention features a thermoplastic composition comprising at least one matrix forming polymer (M) in which are dispersed (K) nodules, (K) nodules wholly or partially packaged in at least one polymer (S) and (S) nodules and such that the (K) nodules wholly or partially packaged are smaller than the (S) nodules.