116 results about "Biethylene" patented technology

The invention provides degradation liquid capable of degrading amine cured epoxy resin, a degradation recovery method and a regeneration method of the amine cured epoxy resin. The degradation liquid comprises an amine compound, an inorganic alkali solution and water. Wherein the ratio of the amine compound is 15%-30%, the ratio of the inorganic alkali solution is 6%-20%, and the balance is water; the amine compound comprises monoethanolamine, diethylenetriamine and triethylene tetramine in a volume ratio of 1: (1-2): (1-2). In the degradation liquid disclosed by the invention, monoethanolamine realizes amidation of degradable weak bonds in an epoxy resin cured substance under the promotion of diethylenetriamine and triethylene tetramine, and realizes degradation of amine cured epoxy resin; the degradation liquid provided by the invention can be used for rapidly and completely degrading a degradable epoxy resin cured product at a relatively low degradation temperature (about 100 DEG C), the degradation product is simply separated and purified to resynthesize the degradable epoxy resin, and the degradation liquid can be recycled through simple distillation.

The disclosure relates to a multi-layered laminate comprising multiple metal foil layers and multiple dielectric (insulating) layers. At least one of the insulating layers includes a copolymer containing diisoalkenylarene (DIAEA) and divinylarene (DVA) units, optionally combined with a filler and / or another dielectric polymer. Another insulating layer includes another dielectric polymer distinct from the DIAEA-DVA copolymer. At least one copolymer-containing insulating layer is positioned adjacent to a metal foil layer. This copolymer layer enhances thermal stability at elevated temperatures and provides improved electrical performance such as reduced dielectric constant (Dk) and dissipation factor (Df) along with excellent processability.

The present application relates to a kind of carbon dioxide mineralization method and carbon dioxide mineralization device.The carbon dioxide mineralization method includes the following steps: mixing absorption liquid and industrial solid waste at room temperature, obtain mortar;Make mortar solid-liquid separation, obtain clear liquid and thick slurry;Carbon dioxide in flue gas is absorbed by clear liquid, obtain carbon-rich absorption liquid;Carbon-rich absorption liquid and thick slurry occur mineralization reaction at 180 DEG C-220 DEG C, obtain mineralized slurry;Make mineralized slurry solid-liquid separation, obtain mineralized ash and mineralized clear liquid;Wherein, absorption liquid includes inorganic base and organic base, organic base includes monoethanolamine, diethanolamine, triethanolamine, 3-methylaminopropylamine, N-methyl diethanolamine, piperazine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and 2-amino-2-methyl-1-propanolamine at least two kinds.The method greatly improves CO2 capture rate and CO2 utilization rate, and organic base consumption is less, absorption liquid regeneration energy consumption is low, and overall economy is good.

The application discloses an oil and gas field polymer solution viscosity protection system with improved ferrous ion tolerance, and belongs to the technical field of oil and gas field chemicals.The system comprises the following components in mass percentage: 5-10% of a ferrous ion stabilizer, 10-20% of a free radical capturing agent, 10-20% of a structure reinforcing agent, 5-10% of a synergist, and the balance of water; the ferrous ion stabilizer is at least one selected from sodium gluconate, potassium gluconate, diethylene triamine pentaacetic acid and hydroxyethylidene diphosphonic acid; the free radical capturing agent is a compound containing phenolic hydroxyl; the structure reinforcing agent is an imidazoline compound; and the synergist is an aldehyde compound.The application method of the viscosity protection system is as follows: the viscosity protection system is first added into liquid water, polymer powder is then added, a gel breaker is further added, and stirring is uniformly performed to obtain a polymer solution.The viscosity protection system significantly reduces the influence of ferrous ions on the viscosity of the polymer solution, and improves the application effect of polyacrylamide substances in the field of oil and gas fields.

The invention provides a preparation method of a non-bulking waterproof moisture-permeable TPU film, and belongs to the technical field of TPU film preparation, and the preparation method of the non-bulking waterproof moisture-permeable TPU film comprises the following steps: stirring raw materials by a high-speed mixer for mechanical mixing; carrying out chemical reaction on the raw material, a divinylbenzene-ethyl acrylate-acrylamide copolymer and butylated hydroxytoluene, and adding tetrahydrofuran to adjust the viscosity of a reaction system, so as to obtain a TPU film material; heating, pressurizing and extruding the mixture through a screw extruder to form a film, plasticizing TPU particles into a semi-finished product, and filtering impurities and re-plasticizing on a filter of calendering equipment; carrying out annealing treatment, cooling in cold water, and pulling out the cooled TPU stretching film from a demolding opening of the demolding machine; the problems that an existing TPU film is poor in preparation size stability and prone to deformation can be solved.

The invention relates to the technical field of composite films for BIB packaging inner bags, and discloses a high-barrier single-material sterile BIB packaging bag and a preparation process thereof, the preparation process comprises the following steps: using vanillin, 3-bromopropene, gallic acid, diethylenetriamine and 1, 3-acetonedicarboxylic acid as raw materials to prepare a gallic acid type grafting monomer; the preparation method comprises the following steps: carrying out melt grafting modification treatment on LDPE (Low-Density Polyethylene) resin by using a gallic acid type grafting monomer, and compounding with graphene oxide through pi-pi accumulation action and hydrogen-bond interaction to prepare the graphene-polyethylene composite master batch with an antioxidant function; the preparation method comprises the following steps: preparing a polyethylene master batch, introducing the master batch into a seven-layer co-extruded film to prepare a polyethylene co-extruded film, and preparing the high-barrier single-material sterile BIB packaging bag by taking the co-extruded film as a raw material of an inner bag of the BIB packaging bag. The polyethylene co-extruded film prepared by the invention still shows excellent mechanical properties and barrier properties after being treated by a radiation sterilization technology, and can be used instead of an existing aluminized polyester bag.

The invention provides polyester resin for a transparent powder coating with excellent adhesive force and leveling as well as a preparation method and application of the polyester resin, and belongs to the technical field of powder coatings. The polyester resin is mainly prepared by taking diethylenetriamine pentaacetic acid, triethyl chlorosilane, 1, 6-hexanediol, N, N-diisopropylethanolamine, 2, 2-dimethyl propanol, neopentyl glycol, 3, 3-tetramethylene glutaric anhydride, 1, 4-cyclohexanedimethanol and the like as raw materials through polymerization. The obtained polyester resin chain segment has many branched structures, the number of amino groups and ester groups in the branched structures is large, the softening point is low, the low-temperature melting fluidity is good, the transparency is high, the adhesive force with a base material is good, then high-functionality diethylenetriamine pentaacetic acid is adopted for carboxyl end capping, the terminal carboxyl functionality is high, the curing activity is high, and the curing effect is good. After being cured with E-12 epoxy resin at low temperature, a coating film is good in leveling property and high in transparency, and can be used in the fields of thermosensitive base materials which are not easy to adhere, such as thin glass materials and the like.

This invention discloses a fluorine-free, environmentally friendly nanomaterial for pretreatment of metal surfaces, its preparation method, and its application method, belonging to the field of coating pretreatment technology. The fluorine-free, environmentally friendly nanomaterial for pretreatment of metal surfaces provided by this invention includes ammonium zirconia nanoparticles and an adsorption modifier; the ammonium zirconia nanoparticles are obtained by coordination aggregation of ammonium ions and hydrated zirconium ions, and the adsorption modifier is obtained by reacting a metal oxide salt with diethylenetriaminepentamethylenephosphonic acid; the metal oxide salt includes one or more of hafnium, technetium, or antimony. The nanomaterial provided by this invention exhibits rapid film formation and high corrosion resistance on metal substrate surfaces. The material does not contain fluorine, avoiding fluorine pollution. The preparation and application processes are environmentally friendly and simple, and it has broad application prospects in the field of coating pretreatment.

The invention relates to a novel rubber material, in particular to white low-density flame-retardant silicone rubber as well as a preparation method and application thereof. The white low-density flame-retardant silicone rubber comprises first vinyl-terminated polysiloxane, second vinyl-terminated polysiloxane, hydrogen-containing polysiloxane, an acyloxy silane coupling agent, a platinum catalyst, an alkynol inhibitor, an inorganic flame-retardant filler, white carbon black and a synergistic flame-retardant system. The white low-density flame-retardant silicone rubber disclosed by the invention is liquid silicone rubber and has the advantages of white color, low density, excellent flame-retardant effect, good processability and the like.

The application discloses a pyrrole polymer electrolyte film in an energy storage lithium battery and a preparation method and application thereof, and belongs to the polymer electrolyte field. The method comprises the following steps: reacting 1-methyl pyrrolidine and bromine n-butane to prepare 1-methyl-1-butyl pyrrolidine bromide; preparing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid by mixing the 1-methyl-1-butyl pyrrolidine bromide and lithium difluoromethane sulfonimide; mixing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bistrifluoromethanesulfonimide, divinylbenzene and benzoin ethyl ether uniformly, coating and curing to obtain a pyrrole ionic liquid polymer electrolyte film. The application combines the molecular configuration of the pyrrolidine-based ionic liquid and the topological structure of the polymer network, realizes triple optimization of ion transmission-mechanical strength-interface stability.

The invention provides an azo dye adsorbent preparation method, which comprises: S1, carrying out alkali treatment on a pyrolytic coke raw material to obtain porous pyrolytic coke; s2, introducing inert gas into the organic amine solution to obtain inert gas carrying organic amine; the organic amine comprises at least one of diethanol amine, hydroxyethyl ethylenediamine and diethylenetriamine; and S3, placing the porous pyrolytic coke in a reactor, then introducing inert gas carrying organic amine into the reactor, and carrying out organic amine modification on the porous pyrolytic coke by adopting a low-temperature plasma technology to obtain the azo dye adsorbent. According to the method, the pyrolytic coke is adopted as the raw material, resource utilization of the waste heat pyrolytic coke is achieved while pollution is reduced, the waste heat pyrolytic coke obtains the use value again through recycling and reprocessing, and resource waste is effectively reduced. The azo dye adsorbent obtained by adopting the preparation method disclosed by the invention has an excellent adsorption effect and has a good application prospect in azo dye wastewater treatment.

The present disclosure provides a laminate. In an embodiment, the laminate includes (1) a first machine direction oriented multilayer film (1MD0), (2) a second film, and (3) an adhesive layer between the 1MD0 and the second film. The 1MDO includes (a) a skin layer with (i) a skin layer (SL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc and (ii) a skin layer (SL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MDO includes (b) a first intermediate layer (FIL) in direct contact with the skin layer. The first intermediate layer includes an FIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (c) a core layer (CL) in direct contact with the first intermediate layer (b). The core layer (c) includes (i) a core layer (CL) first ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc, and (ii) a core layer (CL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc. The 1MD0 includes (d) a second intermediate layer (SIL) in direct contact with the core layer. The second intermediate layer includes an SIL ethylene / a-olefin copolymer having a density from 0.920 g / cc to 0.980 g / cc. The 1MDO includes (e) an interior layer (IL) in direct contact with the second intermediate layer. The interior layer includes (i) an interior layer (IL) first ethylene / a-olefin copolymer having a density from 0.940 g / cc to 0.980 g / cc, and (ii) an interior layer (IL) second ethylene / a-olefin copolymer having a density from 0.900 g / cc to 0.940 g / cc.

The application discloses a preparation of a thermosetting benzocyclobutene-based MQ silicone resin and application thereof in preparing a glass fiber composite material, and comprises the following steps: stirring and reacting an organic silicon source, a solvent, a catalyst and water at 30-50 DEG C for 30-90 min to form a mixed solution A; uniformly mixing divinylsiloxane-benzocyclobutene and the solvent to form a mixed solution B, adding the mixed solution B into the mixed solution A, and heating to 65-80 DEG C for 1-3 h; adding an organic phase after the reaction is completed, washing with water for several times until neutral, removing the solvent by vacuum distillation, and vacuum drying; and obtaining the thermosetting benzocyclobutene-based MQ silicone resin. The thermosetting benzocyclobutene-based MQ silicone resin has excellent dielectric properties, mechanical properties, heat resistance and chemical stability, and the cured resin formed by thermal crosslinking has the properties of low dielectric, high tensile strength, high bending strength, chemical stability and heat resistance.

The application discloses a high-temperature deblocking crosslinking type silicone modified waterborne polyurethane for dispersion dyeing free washing and a preparation method thereof. The silicone modified waterborne polyurethane is composed of two components A and B. The component A is a blocked type silicone modified waterborne polyurethane, which is prepared by condensation of isophorone diisocyanate, poly-1,4-butanediol adipate, polytetrahydrofuran diol, double-hydroxyl blocked polydimethylsiloxane, 2,2-dimethylol butyric acid and 1,4-butanediol, and blocking with a high-temperature deblocking blocking agent. The component B is diethylenetriamine. The silicone modified waterborne polyurethane is applied to digital jet dyeing of polyester fabric with dispersion dyes, so that reduction cleaning and washing processes can be omitted. The surface color yield and penetration rate of the jet-dyed fabric are excellent, the dry rubbing fastness is improved to grade 4-5, the wet rubbing fastness is improved to grade 4, and the soaping fastness can reach grade 5, so the silicone modified waterborne polyurethane has a wide application prospect.

This invention belongs to the field of organosilicon thermally conductive materials, and provides a liquid silicone rubber system for thermally conductive pads and its preparation method. The system comprises vinyl-terminated dimethyl polysiloxane, MQ / phenyl-enriched pre-crosslinked polysiloxane microgel, vinyltrimethoxysilane-modified hexagonal boron nitride, alumina, trimethylsilane-terminated dimethylsiloxane-methylhydrosiloxane copolymer, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane zero-valent platinum complex, and 1-ethynyl-1-cyclohexanol, forming a two-component packaging. This system is advantageous in balancing thermal conductivity, electrical insulation, flowability, defoaming, softness and fit, and long-term stability, making it suitable for the preparation of thermally conductive pads.

The invention relates to the technical field of composite materials, in particular to a carbon fiber composite material bridge. The hard-soft modified spiral carbon fiber composite material is prepared from the following raw materials in parts by weight: 70 to 75 parts of bisphenol A epoxy resin, 15 to 25 parts of diethylenetriamine curing agent, 12 to 15 parts of hard-soft modified spiral carbon fiber, 6 to 8 parts of uvioresistant mixed powder, 3 to 5 parts of organic pigment dispersing agent and 5 to 7 parts of organic pigment. Spiral polyacrylonitrile fibers are prepared through a rope winding effect, then surface modification, high-temperature calcination and fulvic acid solution vacuum impregnation are conducted on tetrabutyl titanate and ammonium ceric nitrate, rigid-flexible modified spiral carbon fibers are prepared, the rigid-flexible modified spiral carbon fibers are added into a resin matrix to form a stress buffer layer, stress concentration is effectively relieved, meanwhile, a large number of hydrogen bonds and hydroxyl bonds are introduced, and the tensile strength of the composite material is improved. The bonding force between the fiber and a resin matrix is enhanced, meanwhile, strong locking can be formed between the spiral shape of the fiber and the matrix, the bending strength, the tensile strength and the impact strength of the carbon fiber composite material are greatly improved, and the mechanical property of the bridge is improved.

Disclosed is a separator for an electrochemical device, an electrochemical device comprising the same, and a method for manufacturing the same. The separator for the electrochemical device can improve resistance and maintain porosity after lamination by including a polyvinylidene-containing binder containing a low content of hexafluoropropylene and / or a polyolefin-containing binder.

To provide a composition that can be used as a pretreatment composition for a coloring or bleaching method of keratin fibers, preferably to protect keratin fibers during the coloring or bleaching method.SOLUTION: Provided is a composition that contains (A) malic acid and / or a salt thereof, (B) at least one chelating agent including diethylenetriaminepenta (methylenephosphonic acid) and / or a salt thereof, (C) at least one thickener, (D) at least one cosmetically acceptable solvent, (E) at least one surfactant, and (F) optionally at least one care ingredient. Also provided are: use of the composition as a pretreatment composition for a coloring or bleaching method; use of the composition to protect keratinous fibers during a coloring or bleaching method; methods for coloring or bleaching keratinous fibers; kits including the composition and an oxidative hair coloring composition; and multi-compartment containers having a compartment housing the composition and a compartment housing the oxidizing composition.SELECTED DRAWING: None

The invention relates to a high-adhesion anti-stripping primer special for a metal substrate and a preparation method thereof, and belongs to the technical field of paints.The primer comprises silane modified phosphoramidate chelating resin, graphite oxide-Schiff base zirconium-siloxane hybrid filler, a hyperbranched polyamide-siloxane bonding accelerant, an isocyanate curing agent, functional auxiliaries and the like. The silane modified phosphoramidate chelating resin is prepared by carrying out a reaction on bisphenol F epoxy resin and diethylenetriamine, and carrying out a reaction on p-toluenesulfonic acid, diethyl phosphite, KH540 and hydroquinone. The graphite oxide-Schiff base zirconium-siloxane hybrid filler is prepared from the following components: GO-SB, ZrO2-siloxane core-shell particles, zirconium n-propoxide and the like. The hyperbranched polyamide-siloxane bonding accelerator is prepared by the following steps: reacting ethylenediamine with methyl acrylate, then reacting with ethylenediamine, and then modifying with KH540 and perfluoroalkyl phosphate. The problems that a traditional primer is weak in interface bonding force, easy to peel off and insufficient in corrosion resistance are solved.

A prepreg and uses thereof are provided. The prepreg includes an organic fiber woven fabric impregnated or coated with a thermally curable resin composition, wherein the thermally curable resin composition includes:(A) a polyphenylene ether resin having an unsaturated functional group;(B) a polyfunctional vinyl aromatic copolymer; and(C) a compound having the structure of formula (I),wherein, in formula (I), X is a C1-C10 linear or branched alkylene; andthe polyfunctional vinyl aromatic copolymer is prepared by copolymerizing one or more divinyl aromatic compounds with one or more monovinyl aromatic compounds.

The application relates to the technical field of zinc ion batteries, in particular to a high-entropy electrolyte and a preparation method and application thereof, which comprises deionized water, an organic solvent, a zinc salt and an additive, the organic solvent comprises any one or more of acetonitrile, pyridine, diethylenetriamine, N,N-dimethylformamide, N,N-dimethylacetamide, ethylene glycol, glycerol, n-butanol and butanediol; and the additive comprises a combination of any one or more of sodium hydroxyethyl cellulose, sodium benzoate, methylene bisnaphthalene sulfonate sodium, sodium citrate, sodium gluconate, sodium polyacrylate, sodium carboxymethyl cellulose and sodium hydroxypropyl cellulose. Compared with a conventional electrolyte, the high-entropy electrolyte has multi-dimensional adjustment capability in terms of freezing point adjustment, electrochemical stability and interface structure optimization, exhibits superior comprehensive performance, effectively solves the problem of poor performance of a low-temperature aqueous zinc ion battery in the prior art, and significantly improves the low-temperature adaptability and service life of the battery.

This invention belongs to the field of functional materials preparation, specifically relating to a method for preparing a carbon dot composite material with time-varying phosphorescent properties, the resulting product, and its applications. This invention uses diethylenetriaminepentaacetic acid and biuret as precursors to prepare green phosphorescent carbon dots via a conventional microwave-assisted synthesis method. The obtained carbon dots have an amorphous carbon structure. Subsequently, these carbon dots are mixed and ground with sodium hydroxide, melamine, and aluminum sulfate, and then subjected to solid-state heating under microwave assistance to successfully synthesize a carbon dot composite material (CDs-y@MA) with time-varying phosphorescent properties. This composite material exhibits time-varying phosphorescence from red to green after irradiation with 365 nm ultraviolet light and demonstrates excellent water resistance. The composite material prepared by this invention not only demonstrates the excellent performance of carbon dot composite materials in time-varying phosphorescence and underwater luminescence but also provides potential application prospects for the development of advanced encryption technologies.

This invention relates to the field of pneumatic tire manufacturing technology, and discloses a radial bicycle pneumatic tire comprising the following components by weight percentage: 30%-55% natural rubber, 13%-25% synthetic rubber, 2%-7% carbon nanotubes, 5%-9% diethylene vulcanizate, 3%-6% propylene glycol diisobutyrate, 2%-4% dibutyl dithiocarbamate, 0.3%-0.8% UV stabilizer, 1%-5% crack inhibitor, 2%-3.7% waterproofing agent, and 1.5%-2.6% diethylene vulcanizate; benzothiadiazole thione is present at 2%-3% by weight. Due to its design characteristics, radial tires exhibit superior wear resistance and shear strength. In contrast, bias-ply tires have a relatively shorter service life. The long lifespan of radial bicycle pneumatic tires reduces the frequency and cost of tire replacement, providing a more economical and reliable option.

The present application relates to the technical field of battery binders, in particular to a water-based binder and a preparation method therefor, and a carbon-coated aluminum foil. The water-based binder comprises a water-soluble monomer, an oil-soluble monomer, an amphiphilic monomer, a functional monomer, an initiator and a neutralizing agent, wherein the amphiphilic monomer comprises at least one of sodium vinylsulfonate, sodium styrene sulfonate, 2-acrylamido-2-methylpropanesulfonic acid, and N-vinylpyrrolidone; and the functional monomer comprises at least one of divinylbenzene, pyrrole, phenylacetylene, and 3,4-ethylenedioxythiophene. The water-based binder of the present application is formulated by compounding the water-soluble monomer, the oil-soluble monomer, the amphiphilic monomer and the functional monomer in proportion, thereby simultaneously improving the electrical conductivity of the binder, the wettability toward conductive carbon materials and aluminum foils, the adhesion to aluminum foils, etc.; and the water-based binder makes a battery prepared therefrom exhibit a good cycling stability, and is conducive to prolonging the service life of the battery.

This invention discloses a low-VOC environmentally friendly interior wall coating composition and its preparation method in the field of architectural coatings technology. The method involves mixing deionized water, diethylenetriamine-terminated hyperbranched polyglycerol-grafted polypropylene glycol diglycidyl ether star copolymer, and polyether-modified polysiloxane. Titanium dioxide, calcined kaolin, heavy calcium carbonate, and talc are then added and ground to obtain a pigment and filler slurry. Next, styrene-acrylic emulsion, acrylic emulsion, and a mixture containing N-(diaminoethyl)-aminopropylmethyldimethoxysilane-modified glycidyl methacrylate-polyetheramine-epoxy soybean oil ring-opening copolymer and methyl isobutyl ketone are added. After stirring, the pH is adjusted to 8.0-9.5 using an associative polyurethane thickener and aminomethylpropanol. Polyether-modified polysiloxane and benzisothiazolinone are then added, followed by degassing to obtain the final product. This coating has extremely low volatile organic compound content and exhibits excellent formaldehyde removal, scrub resistance, and dispersion stability.

A composition comprising at least the following: a first composition comprising components a and b: a) a first ethylene / alpha-olefin interpolymer comprising an I2≤100 dg / min, and a density ≤0.880 g / cc, and b) a second ethylene / alpha-olefin interpolymer comprising an I2>100 dg / min; and wherein the first composition meets the following relationship: y<1.26 ln(x)−3.90, where y=weight ratio of the second interpolymer to the first interpolymer, and x=the I2 ratio of the second interpolymer to the first interpolymer; and wherein the composition comprises ≥60 wt % of the sum of the first interpolymer and the second interpolymer, based on the weight of the composition.

The present invention discloses a method for preparing a polyester-based composite hydrophilic material. The method comprises fibrillating small pieces of waste polyester fabric, then surface-amiding the fibers with a 5-30 wt% aqueous solution of diethylenetriamine to obtain aminated polyester fibers. The small pieces of waste polyester fabric are then aminolyzed with diethylenetriamine in the presence of a zinc acetate catalyst to obtain a polyester aminolysis solution, which is diluted and reacted with ethylene glycol glycidyl ether to prepare a crosslinking solution. Finally, the aminated polyester fibers are immersed in the crosslinking solution to obtain the polyester-based composite hydrophilic material. The polyester-based composite hydrophilic material prepared by the method has a static water contact angle of no more than 30°, exhibits excellent hydrophilic properties, and can be used as an adsorbent material in water treatment, particularly in the treatment of dye wastewater.

This disclosure relates to a film layer for use in flexible metal clad laminates. The film layer comprises a thermosetting composition comprising: a copolymer of (a) a diisoalkenylarene (DIAEA) and (b) a divinylarene (DVA) containing a mixture of m-divinylarene and p-divinylarene, in a mole ratio of (a) to (b) of 15:1 to 1:15; a second polymer; a filler and optional additives. Flexible metal clad laminates made with the film further comprises a metal foil bonded to the surface of the film. The thermosetting composition containing the DIAEA-DVA copolymer provides improved thermal stability at high temperature, excellent processability, and electrical properties, e.g., Dk and Df.

The invention provides an anti-yellowing high-activity platinum-containing coordination catalyst, which is characterized in that chloroplatinic acid is used as a platinum source, 1, 3-divinyl tetramethyl disiloxane (M2vi) and 1, 3, 5, 7-tetramethyl-1, 3, 5, 7-tetravinyl cyclotetrasiloxane (D4vi) are used as ligands, the chloroplatinic acid, the M2vi and the D4vi are subjected to a coordination reaction under the condition of sodium bicarbonate, and the anti-yellowing high-activity platinum-containing coordination catalyst is obtained through the combined action of multiple ligands. And a platinum catalyst system with inherent stability and high activity is constructed. The invention also provides a preparation method of the anti-yellowing high-activity platinum-containing coordination catalyst, which comprises the following steps: step-by-step impurity removal and purification are carried out, an alcohol solvent is firstly removed, and then an organosilicon low-boiling solvent is used as an entrainer, so that free M2vi and D4vi can be efficiently removed, and the anti-yellowing high-activity platinum-containing coordination catalyst with high purity, high activity and high platinum content is prepared.