摘要:
The invention relates to a binding agent comprising a mixture of a carboxylic acid vinyl ethylene ester copolymer (A) and a of olefin (B) containing a functional monomer (X), the mass ratio (B)/((A)+(B)) being between 0.05 and 1. Said binder has very good adhesion properties for adhering to a number of supports in photovoltaic modules, in addition to satisfactory transparency and electrical resistivity properties for the advantageous use of the binder in said modules.
摘要:
The invention relates to the use in a photovoltaic module of a film of a composition as a backsheet or as an encapsulant, this composition comprising, with respect to the total weight of the composition: from 1 to 99% of a polyethylene having an ethylene whose level by weight is greater than or equal to 80% chosen from the homopolymers of ethylene and the copolymers of ethylene and another alpha-olefin; from 99 to 1% of a polyolefin B, other than A, carrying a reactive functional group X chosen from the anhydride carboxylic acids and epoxides. The invention further relates to a photovoltaic module comprising the film of the composition according to the invention and also a process for the manufacture of this module.
摘要:
The invention relates to the use in a photovoltaic module of a film of a composition as a backsheet or as an encapsulant, this composition comprising, with respect to the total weight of the composition: from 1 to 99% of a polyethylene having an ethylene whose level by weight is greater than or equal to 80% chosen from the homopolymers of ethylene and the copolymers of ethylene and another alpha-olefin; from 99 to 1% of a polyolefin B, other than A, carrying a reactive functional group X chosen from the anhydride carboxylic acids and epoxides. The invention further relates to a photovoltaic module comprising the film of the composition according to the invention and also a process for the manufacture of this module.
摘要:
The invention relates to the use in a photovoltaic module of a film of a composition as a backsheet or as an encapsulant, this composition comprising, with respect to the total weight of the composition: from 1 to 99% of a polyethylene having an ethylene whose level by weight is greater than or equal to 80% chosen from the homopolymers of ethylene and the copolymers of ethylene and another alpha-olefin; from 99 to 1% of a polyolefin B, other than A, carrying a reactive functional group X chosen from the anhydride carboxylic acids and epoxides. The invention also relates to, the composition additionally comprises a polyolefin C, other than B, which carries a functional group Y capable of reacting with the functional group X. The invention further relates to a photovoltaic module comprising the film which is used of the composition and also a process for the manufacture of this module.
摘要:
The invention relates to a binding agent comprising a mixture of a carboxylic acid vinyl ethylene ester copolymer (A) and a polyolefin (B) containing a functional monomer (X), the mass ratio B/(A+B) being between 0.05 and 1. Said binder has very good adhesion properties for adhering to a number of supports in photovoltaic modules, in addition to satisfactory transparency and electrical resistivity properties for the advantageous use of the binder in said module.
摘要:
A composition including a mixture of a cross-linking agent and a first polyolefin including a functional monomer selected from among unsaturated carboxylic diacid or carboxylic acid anhydrides, the unsaturated carboxylic acids and the unsaturated epoxides being suitable for cross-linking with a second polyolefin in order to form an assembly adhered to a substrate, said assembly and the substrate forming an integral structure having two separate layers, characterized in that the amount of cross-linking agent is no lower than 5% of the total weight of the composition. Said masterbatch enables, even in the absence of silanes, cross-linking of polymers, in particular polyolefins, in order to increase the adhesive capacity thereof to substrates such as polymers, metals, metal oxides or silicon. Said masterbatch can be used in particular for encapsulating photovoltaic cells.
摘要:
A cross-linking system which includes at least; one organic peroxide having a half-life of one hour at any temperature selected in the range from 80 DEG C. to 115 DEG C., and a cross-linking coagent, the half-life of said peroxide being measured by dissolving the peroxide in n-dodecane having a concentration of 0.2 mol/l. Said system enables, when added to a polymer, quick cross-linking of said polymer. The system is in particular suitable for encapsulating photovoltaic modules; in particular, the system can be used to improve the productivity of the method for manufacturing said modules.
摘要:
The invention relates to a method for production of grafted polyethylene comprising the following steps: a) fermentation of primary renewable material with optional purification to give at least one alcohol chosen from ethanol or a mixture of alcohols comprising ethanol; b) dehydration of the alcohol obtained to give in a first reactor at least one alkene selected from ethylene and mixtures of alkenes containing ethylene and optional purification of the alkene to give ethylene; c) polymerization, in a second reactor, of the ethylene to give polyethylene; d) isolation of the polyethylene obtained in step c); e) grafting the polyethylene with at least one grafting monomer selected from the unsaturated carboxylic acids or theifunctional derivatives thereof, the unsaturated dicarboxylic acids having 4-10 carbon atoms and the functional derivatives thereof being C1-C8 alkyl esters or glycidyl ester derivatives of the unsaturated carboxylic acids and the metal salts of the unsaturated carboxylic acids. The invention further relates to the grafted polyethylene obtained by said method, the copolymers and compositions comprising said polyethylene and the use of said polyethylene.
摘要:
The present invention relates to olefin polymers having associative groups containing nitrogen heterocyclic compounds, to hot-melt adhesives including such polymers, and to method for producing same. Specifically, the invention relates to a polymer comprising units from ethylene and from a monomer having associative groups, said monomer including a polymerizing reactive group and an associative group containing nitrogen heterocyclic compounds.
摘要:
The invention relates to a multi-layer weatherable film structure having an outer layer of a highly weatherable film, a layer having a high thermal deformation temperature, an optional tie layer, and a thin layer of polyolefin or polyamide. The highly weatherable film layer preferably is polyvinylidene fluoride. The polyolefin or polyamide layer is less than 500 microns in thickness, and preferably the whole film structure is less than 750 microns thick. The polyolefinjpolyamide side of the film structure can easily be adhered to many different substances—especially polyolefins and polyamides. This film can be used to provide a highly weatherable protective layer a substrate. One useful application for the film is in a photovoltaic module to protect the back side of the module from weathering and abrasion. The multi-layer film structure can be adhered to a typical polyolefin-based encapsulant layer and used as a backsheet encapsulant in a photovoltaic module.