1466 results about "Graft polymer" patented technology

The present invention relates to a process for grafting an unsaturated monomer onto a fluoropolymer, having the steps of:a) melt blending the fluoropolymer with the unsaturated monomer;b) forming the blend obtained in a) into films, sheets, granules or powder;c) exposing the products from step b), in the absence of air, to photon (γ) or electron (β) irradiation with a dose of between 1 and 15 Mrad; andd) optionally treating the product obtained at c) in order to remove all or part of the unsaturated monomer that has not been grafted onto the fluoropolymer.Structures made with these materials are barriers to many fluids and in particular to petrol and to air-conditioning fluids and may be formed into bottles, tanks, containers, pipes, hoses and vessels of all sorts. They may also be converted into films with which packaging is made.

A surface graft material including a substrate and a surface graft polymer chain, wherein the surface graft polymer chain includes a photocleavable moiety at one of its terminals, and the surface graft polymer chain is directly bonded to a surface of the substrate by a covalent bond between the photocleavable moiety and the substrate. A graft pattern formation method comprising exposing the graft material to cleave the photocleavable moiety in the exposed area, and removing the graft polymer chain from the exposed are to form a surface graft polymer chain pattern. A conductive pattern material and a metal particle pattern material using the graft pattern.

Grafting a polymer at the surface of a carbonated material containing carboxyl, amine and / or hydroxyl functions at its surface. This material is suspended in a solution comprising the polymer to be grafted, which includes a carboxyl, amine and / or hydroxyl function, the solution also comprising a solvent of the polymer. This is followed by a treatment causing dehydration into a carboxyl function, an amide and / or hydroxyl function and the polymer is thus grafted on the carbonated material by means of ester or amide bonds. Utilization in the cathode or anode of an electrochemical generator, in a polymer material with low polarity, in an ink, and as a conductive deposit on flexible plastic used as electrical contact, electromagnetic protection and antistatic protection.

The invention relates to a polypropylene graft polymer preparing method which is characterized in that: (a) calculated by weight parts, the polypropylene graft polymer comprises 100 parts of polypropylene, 0.1-20 parts of graft monomer maleic anhydride, 0.1-20 parts of graft monomer styrene monomer or vinyl acetate monomer, 0.01-10 parts of peroxide initiator and 1-20 parts of other vinyl monomers; (b) the graft monomers, the initiator and the polypropylene are evenly mixed; (c) the reactants are heated to reach a temperature of 70-120 DEG C and then react for 1-10 hours; and (d) after the reaction, the polypropylene graft polymer can be obtained through cooling. During the implementation of the method, no solvent, suspending medium or interfacial agent needs to be used, the obtained product can be applied without needing further treatment, for example, a compatilizer for a polypropylene composite material; and the obtained product is particularly used for improving the interfacial compatibility and dispersivity of inorganic filler and polyolefine. The conversion rate of the graft monomers of the invention is greater than 95 percent, and at least 55 percent of the graft monomers form graft polypropylene.

A barrier composition which is injection mouldable and able to be made into a transparent film or incorporated (by co-extrusion and / or lamination) into multi-layer film products, the composition on dry basis: a) from 45 to 90% by weight of a starch and / or a modified starch selected from starches modified by reaction with a hydroxyl alkyl group, an acetate or a dicarboxylic acid anhydride or a grafting polymer; b) from 4 to 12% by weight of a water soluble polymer selected from polyvinyl alcohol, polyvinylacetate, and copolymers of ethylene and vinylalcohol which have a melting point compatible with the molten state of the starch components c) from 5 to 45% by weight of a non-crystallising mixture of sorbitol and at least one other plasticizer selected from glycerol, maltitol, xylitol, mannitol, glycerol trioleate, epoxidised linseed or soybean oil, tributyl citrate, acetyl tri-ethyl citrate, glyceryl triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate; polyethylene oxide or polyethylene glycol; d) from 0.3 to 2.5% by weight of a C12-22 fatty acid or salt; e) from 0.25% to 3% of an emulsifier system having a hydrophilic lipophilic balance value between 2 and 10. The barrier film may be co-injection moulded with polyethylene terephthalate (PET) or polylactic acid (PLA) for blow moulding into beverage bottles, with polyethylene (PE) or polypropylene (PP) or biodegradable polymers for high gas-barrier containers or closures, or may be co-extruded with polyethylene, polypropylene or polylactic acid for thin film packaging applications or for blow-moulded containers.

Disclosed is a nanocomposite comprising a nano-reinforcing material (e.g., layered clay), a polymer matrix (e.g., a polyolefin), and, an epoxy-functionalized graft polymer compatible with the polymer matrix (e.g., epoxy-grafted polyolefin). Such nanocomposites are useful in the fabrication of a variety of materials including parts for the transportation and packaging industries, electronics, business equipment, building and construction materials.