113 results about "Ethyl vinyl" patented technology

Compounds corresponding to formula (I)F2C=CFX(CY2)nBr (I)in which: X represents an atom of oxygen or no atom; Y represents an atom of hydrogen or of fluorine; and n is a whole natural number ranging from 0 to 10 inclusive, excluding bromotrifluoroethylene, 3-bromo-perfluoropropene, 4-bromo-1,1,2,-trifluorobutene, 4-bromo-perfluorobutene-1 and perfluoro(2-bromo-ethylvinyl ester), and their use in the synthesis of fluorinated copolymers then in the synthesis of homosulphonated fluorinated elastomers, exhibiting a low glass transition temperature.

The present invention relates to a composition of tetrafluoroethylene/perfluoro(ethyl vinyl ether) copolymer particles and metal powder which enables the composition to the used for rotolining an interior surface of a hollow article, wherein the resultant lining adheres to such surface. The invention further relates to oil pipe having its interior surface rotolined with fluoropolymer, the rotolining containing an effective amount of metal powder to cause the rotolining to adhere to said interior surface and a process for rotolinig the interior of the oil pipe.

A fabric for chemical protective garments having at least two multilayered film laminates separated by a scrim forming a barrier chamber. The laminates are sandwiched between films of linear low density polyethylene and contain a different film from each other selected from ethyl vinyl alcohol, polyethylene terephthalate and polyamide. There is also the garment prepared with the fabric.

A heat shield is generally provided, along with methods of making the heat shield and its use in a vehicle safety device (e.g., an airbag). In one embodiment, the heat shield includes a base substrate (e.g., a nonwoven fabric, a woven fabric, or a film); a heat resistant coating on the base substrate; and a first point-bonded sheet laminated to the heat resistant coating such that the first point-bonded sheet forms an outer surface of the heat shield with the heat resistant coating positioned between the first point-bonded sheet and the base substrate. The heat resistant coating generally comprises particles of an inorganic mineral (e.g., vermiculite, mica, or a combination thereof) dispersed within a film-forming binder (e.g., an acrylic resin, a styrene-butadiene rubber, a polyvinyl alcohol, an ethyl vinyl acetate resin, a phenolic resin, or a combination thereof).

[Problem] To provide a photochromic lens for eye glasses, which has a high refractive index and excellent light-controlling properties and has such a constitution that the weight and thickness of the lens can be reduced. [Solution] Provided is a photochromic lens for eye glasses, which is produced by polymerizing a polymerizable composition prepared by dissolving a photochromic compound into a monomer mixture comprising a first radically polymerizable monomer represented by general formula (I), a second radically polymerizable monomer represented by general formula (II) and divinylbenzene that has a purity of 50% or more and contains a divinylbenzene component and an ethylvinylbenzene component at a total content of 90% or more.

The invention discloses a preparation and chemical modification method of a polymer graphene composite chromatographic filling material. According to the preparation and chemical modification method, polystyrene-divinyl benzene (PS-DVB) or poly(ethyl vinyl benzene)-divinyl benzene (PEVB-DVB), and oxidized graphene are used for preparing a substrate material, hydrazine hydrate in-situ reduction or fractional reduction is adopted to realize reduction of oxidized graphene and realize agglomeration of reduced oxidized graphene onto the surface of the substrate material so as to form a wrinkled graphene shell layer and obtain the polymer graphene composite chromatographic filling material. The polymer graphene composite chromatographic filling material is high in stability, is capable of tolerating a wide pH range, and possesses organic solvent compatibility; modification with a plurality of ion exchange groups can be realized based on different reaction characteristics of surface combined graphene so as to prepare anion and cation exchange chromatography filling materials at the same time; separation of common anions and cations is realized preferably; and the polymer graphene composite chromatographic filling material is especially suitable to be used in inhibiting conductive type ion chromatography.

Rubber composition based on at least one diene elastomer, a polymeric filler as reinforcing filler and a coupling agent for bonding between the polymeric filler and the elastomer. The polymeric filler includes nanoparticles of a polyvinylaromatic (PVAr) carrying a functional group denoted by Z of formula a ≡Si—X, X representing a hydroxyl or hydrolyzable group. The PVAr is especially a copolymer of styrene, ethylvinylbenzene, divinylbenzene and trimethoxysilylpropylacrylate or trimethoxysilylpropylmethacrylate, being in the form of nanobeads, the diameter of which is between 10 and 100 nm. Also described is a method of obtaining such a composition, and use of such a rubber composition for the manufacture of rubber articles, in particular tires or rubber semi-finished products intended for these tires, as well as a masterbatch including at least one diene elastomer and such a polymeric filler, and a method of obtaining such a masterbatch.

The present invention relates to a symmetrical multi-layer tube based on polyamide and ethyl vinyl alcohol (EVOH) or polyvinyl alcohol (PVOH) for transferring fluids. As examples of tubes for transferring fluids, mention may be made of fuel (gasoline, diesel fuel) pipes, in particular for carrying fuel from the tank to the engine of motor vehicles. Other examples of fluid transfer include, but are not limited to, the fluids used in fuel cells, CO₂ systems for cooling, hydraulic systems, cooling circuits and air-conditioning circuits, and medium-pressure power transfer.

This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.

Disclosed herein are compositions and methods related to a packaging laminate comprising: a first polymeric layer comprising a polypropylene copolymer or a high density polyethylene (HDPE) resin; and a second polymeric layer comprising a high density polyethylene, (HDPE) resin or linear low density polyethylene (LLDPE) resin with a coextruded ethyl vinyl alcohol (EVOH) compatibilizer. Also disclosed herein are packaging containers formed of the packaging laminates.

The invention provides an asphalt self-adhesive, and a preparation method and a use thereof. The asphalt self-adhesive comprises, by weight, 70-75 parts of asphalt, 10-15 parts of rubber oil, 13-15 parts of SBS, 5-10 parts of polyamide resin, 10-15 parts of N,N-dimethylformamide and 5-10 parts of triethylvinylsilane. The asphalt self-adhesive is modified, modifiers are added, and the use amount proportions are optimized, so the bonding strength of the asphalt self-adhesive is improved, and the high-temperature resistance and the cohesive force of the asphalt self-adhesive are improved.

The invention relates to a fluorine-containing network structure ion exchange membrane based on fluoroethyl vinyl ether polyalcohol and preparation method thereof. Polar organic solvent is adopt to dissolve perfluorinated sulfonic acid resin and anhydrous poly isocyanate as well as anhydrous fluoroethyl vinyl ether (FEVE) polyalcohol; tape casting is adopted to form a membrane on smooth solid surface; then heating is carried out and poly isocyanate and anhydrous FEVE take polymerization, and products of the polymerization and perfluorinated sulfonic acid molecule chain form ion exchange membrane in macromolecule interpenetrating network structure. The membrane preparation method can obtain fluorine-containing ion exchange membrane material with favourable proton commutativity, overcomes the defect that the existing fusion mould pressing process can not prepare homogeneous cross linking ion exchange membrane and has the advantages of simple technological process and easy industrial scale-up.

This invention relates to novel Ruthenium- or Osmium-based complex catalysts based on Grubbs-Hoveyda, Grela or Zhan IB, and a catalyst composition comprising at least one vinyl group, preferably a specific promoter of ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such novel catalyst compositions. The process preferably comprises a metathesis step, wherein a complex catalyst used in the metathesis step is same with that used in the hydrogenating step.

The invention discloses an ester super sustained release polycarboxylic acid slump retaining agent and a preparation method thereof. The preparation method of the ester super sustained release polycarboxylic acid slump retaining agent comprises the following steps: (1) preparing methacrylic acid, saturated acid and 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulphonic acid under the action of a catalyst into unsaturated esterified small monomers; (2) stirring methoxypolyethylene glycol, methacrylic acid, concentrated sulphuric acid and beta-phenyl-naphthylamine in a flask, and reacting to obtain esterified monomers MP; and (3) stirring diethyl vinyl phosphate, a cationic photoinitiator A and water in a flask, mixing unsaturated carboxylic acid hydroxyalkyl ester monomers, the esterified monomers MP, unsaturated monocarboxylic acid, the unsaturated esterified small monomers and water, mixing a free radical polymerization photoinitiator B and water, mixing a chain transfer agent and water, irradiating the flask in ultraviolet light, and respectively adding the aqueous solutions into the flask dropwise, continuing reacting, and adding a sodium hydroxide aqueous solution for neutralizing to obtain the ester super sustained release polycarboxylic acid slump retaining agent. The slump retaining agent prepared by the preparation method has good slump retaining capacity for a long time.

The invention discloses an antifoaming agent composition for papermaking and a preparation method thereof. The antifoaming agent composition comprises, by weight part, a first component and a second component. The first component comprises, by weight part, fatty acid metal soup, fatty acid amide, higher aliphatic acid-terminated polyether ester, higher aliphatic acid ester, ethyl vinyl ether, sodium dodecyl sulfate, hydrophobic white carbon black, an emulsifier and a dispersant. The second component comprises, by weight part, organic silicone resin, dimethicone, lysine, fatty acid polyglycol ester, silica, sodium carbonate and calcium chloride. The preparation has simple processes and realizes a low cost. The antifoaming agent composition has small viscosity and can be easily emulsified and dispersed. Calcium chloride inorganic nanoparticles can inhibit inorganic component bubble generation in a system so that foam in an inorganic substance-organic substance mixed system is fast eliminated, a dehydration process is accelerated, paper pulp washing effects are improved, a water use amount is reduced, later pollution is avoided and paper pulp quality is improved.