摘要:
The invention concerns a mixture comprising by weight, the total being 100%, 1 to 100% if 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 copolymerization from its double bond; 99 to 0% of a flexible polyolefin with elastic modulus in flexure less than 50 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 molding technique.
摘要:
The invention concerns a crosslinkable composition of functionalized polyolefin powder comprising a functionalized polyolefin (A) having an MFI of at least 20 (190° C. 2.16 kg), a product (B) having a function for crosslinking (A), the composition having a grain size distribution between 100 and 400 &mgr;m. Said composition is useful for slush moulding, for thermoforming sheets or injection on an insert.
摘要:
The present invention relates to a coextrusion binder comprising: 5 to 35 parts of a polymer (A) which itself consists of a blend of 80 to 20 parts of a metallocene polyethylene (A1) of relative density between 0.865 and 0.915 and of 20 to 80 parts of a non-metallocene LLDPE polyethylene (A2), the blend of (A1) and (A2) being cografted by an unsaturated carboxylic acid; 95 to 65 parts of a polyethylene (B) chosen from ethylene homopolymers or copolymers and elastomers; the blend of (A) and (B) being such that: the content of grafted unsaturated carboxylic acid is between 30 and 100 000 ppm, the MFI or melt flow index (ASTM D 1238 standard: 190° C./2.16 kg) is between 0.1 and 10 g/10 min. The present invention also relates to a multilayer structure.
摘要翻译:共挤出粘合剂本发明涉及一种共挤出粘合剂,其包含:5-35份聚合物(A),其本身由80至20份相对密度为0.865至0.915和20至80的茂金属聚乙烯(A1)的共混物 部分非金属茂LLDPE聚乙烯(A2),(A1)和(A2)的共混物由不饱和羧酸共同接枝; 95-65份选自乙烯均聚物或共聚物和弹性体的聚乙烯(B); (A)和(B)的共混物使得:接枝不饱和羧酸的含量为30-10000ppm,MFI或熔体流动指数(ASTM D 1238标准:190℃/ 2.16kg)为 介于0.1和10g / 10分钟之间。本发明还涉及一种多层结构。
摘要:
The present invention relates to a process for the preparation of graft thermoplastic polymers in which at least one thermoplastic polymer (A) is grafted with a functional monomer in the presence of a substance which inhibits or reduces the crosslinking or the depolymerization of (A).This substance may be a stable nitroxide radical.Graft polymers are useful as compatibilizing agents in mixtures of polymers and as coextrusion binders. The invention also relates to multilayer structures including these binders.
摘要:
The subject of the invention is a metallized film produced using a multilayer structure comprising a tie layer comprising: 5 to 50% by weight of a blend (A) comprising: 5 to 100% of a cografted blend of polymers (C1) and (C2), consisting of 90 to 20% by weight of a metallocene polyethylene (C1) of density between 0.865 and 0.915 and of 10 to 80% by weight of a polymer (C2) which is either a non-metallocene LLDPE or a polypropylene homopolymer or copolymer, and 95 to 0% by weight of a polyethylene (D) chosen from polyethylene homopolymers or copolymers and elastomers; the blend (A) being such that: the content of grafting monomer grafted is between 30 and 105 ppm; the MFI or meltflow index (ASTM D 1238, at 190° C./2.16 kg) is between 0.1 and 30 g/10 min; 50 to 95% by weight of a polypropylene homopolymer or copolymer (B).
摘要:
The invention relates to a mixture which is useful as a coextrusion binder, comprising: at least (A) one polyethylene or one ethylene copolymer, at least (B) chosen from (B1) polypropylene or a propylene copolymer, (B2) poly(1-butene) homo- or copolymer, and (B3) polystyrene homo- or copolymer, the mixture of (A) and (B) being grafted with a functional monomer, this grafted mixture itself optionally being diluted in at least one polyolefin (C) or in at least one polymer (D) of elastomeric nature or in a mixture of (C) and (D). The invention also relates to polyolefin/binder/polyamide, EVOH, polyester or metal structures. The invention is useful for making packaging.
摘要:
A subject matter of the invention is a coextrusion tie, which comprises: 5 to 35% by weight of a polymer (A) itself composed of a blend of 80 to 20% by weight of a metallocene polyethylene (A1) with a density of between 0.863 and 0.915 and of 20 to 80% by weight of a non-metallocene LLDPE polyethylene (A2) with a density of between 0.900 and 0.950, the blend of polymers (A1) and (A2) being cografted; 95 to 65% by weight of metallocene polyethylene (B) homo- or copolymer, the comonomer of which comprises 3 to 20 carbon atoms, preferably 4 to 8 carbon atoms, the density of which is between 0.863 and 0.915 and the MFI of which is between 0.5 and 30, preferably between 3 and 15, g/10 min; the total forming 100%, the blend of (A) and (B) being such that its MFI is between 0.1 and 15, preferably between 1 and 13, g/10 min.
摘要:
The present invention relates to a process for manufacturing a transparent article with gas-barrier properties by coextrusion blow-molding, the said article comprising at least a structure of the type: layer of EVOH/tie layer/layer of glycolised copolyester and relates to a multilayer structure comprising a coextrusion tie layer adhering to a layer of glycolised polyester copolymer. The said tie comprises a blend of metallocene polyethylene, non-metallocene LLDPE, both of which are co-grafted, and non-grafted polyethylene. The invention also relates to articles comprising such a structure, in particular hollow bodies.
摘要:
A coextrusion binder and a multilayer structure containing the binding wherein the binder contains a composition comprising (I) syndiotactic polypropylene and (II) at least one polymer being: (A), a polyethylene or a copolymer of ethylene, (B), any of (B1) isotactic polypropylene homopolymer of copolymer, (B2) poly(1-butene) homo- or copolymer or (B3) polystyrene homo- or copolymer, and a blend of (A) and (B), said composition being grafted with a functional monomer such that each of I and II is at least partially grafted with said functional monomer.
摘要:
The invention concerns a film comprising ethylene copolymers and an unsaturated epoxide and comprising quinones grafted on said copolymers. The invention also concerns a structure comprising at least an oxygen-barrier film and at least said oxygen-absorber film. The invention further concerns a packaging element comprising said structure wherein, starting from inside and moving outwards, there is first the oxygen-absorber-film followed by the barrier film.