128 results about "Resorcinol-formaldehyde resin" patented technology

The invention relates to a zero degree belt compound of all-steel radial tire, which is characterized by being prepared from a plurality of raw materials. The raw materials in formula comprises 10# natural rubber, carbon black N375, carbon black N660, hydrated silica, zinc oxide, modified alkylphenol- formaldehyde resin TKM-M, N-(1,3-dimethylbutyl)-N'-phenyl p phenylenediamine, resorcinol formaldehyde resin, cobalt boroacylate, hexamethoxy methyl melamine, N-t butyl-2-benzothiazolesulfenamide, insoluble sulfur HD OT20 and N-cyclohexylthiophthalimide. The invention is used as zero degree belt compound in all-steel radial tire production. The rubber compound of the invention has the advantages of reducing extrusion temperature of the zero degree belt, improving extrusion speed, increasing surface viscosity of the zero degree belt, prolonging holding time of viscosity, improving rubber-coating effect, and effectively solving the quality problems of point-like copper exposition and poor surface viscosity.

The invention discloses an intermediate adhesive material for retreaded tires. The adhesive material disclosed by the invention contains resorcinol-formaldehyde resin, hexamethoxy methyl melamine, zinc oxide (in high dose ratio), and N-ethyl-N-phenyldithiocarbamic acid zinc salt serving as a low-temperature promoter. The key points of the intermediate adhesive material include: the intermediate adhesive material is prepared from various raw materials including No.20 natural rubber, cis-1,3-butadiene rubber (BR)9000, abietic styrene butadiene rubber (SBR)1500, resorcinol-formaldehyde resin, zinc oxide (in high dose ratio), stearic acid, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine,poly(1,2-dihydro-2,2,4-trimethyl-quinoline), poly(2-dihydroquinoline), carbon black N330, carbon black N660, coumarone-indene resin, aromatic oil, zinc ethylphenyl dithiocarbamate, hexamethoxy methyl melamine, N-cyclohexylbenzolthiazole-2-sulfenamide, 2-mercaptobenzothiazole, and insoluble sulphur (IS)-7020( the sulfur content is 80 percent). The adhesive material disclosed by the invention is mainly used in the intermediate adhesive layers of retreated diagonal tires and retreaded steel-belted radial tires and when the adhesive material disclosed by the invention is used, the tire tread and tire body adhering strength of the intermediate adhesive material is improved obviously; the H drawing force of the adhesive material with all-steel cords and nylon cords is improved to reduce the tire tread and tire body separation phenomenon of the finished retreaded diagonal tires and retreaded steel-belted radial tires; and thus, the driving safety and service life of the diagonal tires and the retreaded steel-belted radial tires are improved.

The invention relates to a heavy anti-corrosive nano composite coating technology, in particular to a boron phenolics-titanium nano composite temperature and pressure resistant heavy anti-corrosive coating and a preparation method thereof. The formula of the coating is as follows: 30 to 35 parts of modified phenolic polymer, 4 to 8 parts of nano composite liquid, 5 to 8 parts of reinforced carbon fiber, 20 to 25 parts of rutile titanium dioxide, 5 to 8 parts of silicon carbide powder, 4 to 7 parts of nickel-based alloy powder, 2 to 4 parts of flame retardant, and 15 to 22 parts of mixed solvent; and the materials are mixed in a ratio, dispersed and ground to have the grain size of below 40mu m, mixed with composite curing agent (the ratio is 1:0.5 to 1) which comprises linear phenol formaldehyde resin and resorcinol formaldehyde resin by the ratio of 1 to 3:1, heated and cured for 2 to 3h at 160 to 180DEG C, to prepare the heavy anti-corrosive composite coating. The coating of the invention can resist high temperature, high pressure (5 to 15MPa, 100 to 180DEG C) when the thickness is 0.1 to 2.0mm, and corrosion damage which contains hydrogen sulfide, sulfur dioxide, carbon dioxide, chloride and other strong acidic corrosive media, and the bonding force between the coating and a metal substrate is strong.

The invention discloses a styrene butadiene rubber emulsion modifying agent which comprises the following components in parts by weight: 35-50 parts of hydroxyethyl methacrylate, 15-30 parts of alkyl resorcinol formaldehyde resin and 3-5 parts of hexamethoxy methyl melamine. The styrene butadiene rubber emulsion modifying agent disclosed by the invention is simple in preparation method and less in environment pollution, and can reduce the ageing speed of styrene butadiene rubber and greatly prolong the service life of the styrene butadiene rubber under the precondition that the rubber quality is ensured.

The invention discloses a reclaimed nitrile rubber sealing ring material which is prepared from nitrile rubber 3345, reclaimed nitrile rubber, antioxidant SP, antioxidant MB, stearic acid, sulfur powder, palm wax, zinc oxide, processing aid WB16, carbon black N550, carbon black N330, methylpentachlorostearate, promoter TMTD, promoter TETD, promoter DM, nanometer calcium carbonate, modified acrylate, alkyl resorcinol formaldehyde resin, maleic anhydride, a plasticizer, etc. According to the invention, reclaimed nitrile rubber is used as a raw material and formulated raw materials are optimized so as to prepare the reclaimed nitrile rubber sealing ring material with excellent performance, good high temperature resistance and high hardness, which enables cost to be saved.

The invention discloses a preparation method of a palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material. The preparation method comprises the steps of firstly, synthesizinga RF sphere in an alcohol-aqueous solution; secondly, preparing a multi-core palladium-coated resorcinol-formaldehyde resin (RdRF) nanometer sphere with a core-shell structure; thirdly, coating an upper mesoporous silicon oxide shell layer with the RdRF sphere to obtain a RdRF meso-SiO2 core-shell material with a dual-shell layer; and finally, removing the RF shell layer and a surfactant to obtain a multi-core Pdmeso-SiO2 nanometer sphere with a hollow structure. A synergic template method combining a hard template method and a flexible template method is employed, the palladium-mesoporous silicon oxide hollow multi-core nanometer catalytic material is obtained by an improved Stober method, a hydrothermal method, a sol-gel method and a roasting method, and the synthesis method also can beexpanded to prepare other previous metal and mesoporous silicon oxide hollow materials such as a composite material of Aumeso-SiO2 or Ptmeso-SiO2 having a hollow structure, and has important significance and value.

The invention provides an alkyl resorcinol formaldehyde resin for the production of rubber products including tires and wire rope conveying belts, as well as the production process. The resin comprises the following substances: resorcinol 22-25 parts, formaldehyde 10-11.5 parts, phenylethene 11-13 parts, oxalic acid 0.5-0.8 part, water 8-12 parts, and 20% of NaOH solvent. The production process comprises alkylation reaction and hydroxylation.

The present invention relates to a composition containing a hydrogenated nitrile-butadiene rubber (HNBR), a peroxide crosslinking system and a resorcinol-formaldehyde resin, to a process for the preparation of the composition, to the use of the composition as an adhesion promoter, and also to a multilayer product containing the composition according to the present invention.

The invention discloses a preparation method of an acidic ionic liquid resorcinol formaldehyde resin copolymer material, and belongs to the technical field of organic chemical synthesis. The method is characterized by comprising the steps of: reacting vinyl pyridine compound with sultone to obtain ethylenic bond-containing sulfonic ylid; acidulating by sulfuric acid to obtain sulfonic functionalized ionic liquid monomer with anion of acid radical; carrying out self-assembly on the ionic liquid monomer to form an ionic liquid polymer solution; and then adding resorcinol and formaldehyde in theionic liquid oligomer solution; condensing at 65-95 DEG C for 60-120 hours; carrying out rotary evaporation to dryness; and placing at 180-300 DEG C for condensation reaction for 2-32 hours to obtainthe acidic ionic liquid resorcinol formaldehyde resin copolymer material. The material synthesized by the method of the invention has advantages of high thermal stability, high acid value and good catalytic effect.

The invention discloses a resorcinol formaldehyde resin base solid acid and a preparation method and application thereof, belonging to the technical field of chemical synthesis. The invention is characterized in that the preparation method comprises the following steps: by using resorcinol as a raw material, a formaldehyde solution (the mol ratio of the raw material to the formaldehyde solution is (1:1)-(1:3)) as a crosslinking agent and hydroxy-ethyl sulfonic acid (the mol ratio of the raw material to the hydroxy-ethyl sulfonic acid is (1:0.1)-(1:1)) as an active molecule, adding water (the mass ratio of the resorcinol to the water is 1:5-1:20) to prepare a solution; carrying out condensation reaction at 65-95 DEG C for 60-120 hours, and drying by rotary evaporation to obtain the RF (resorcinol formaldehyde) resin; then, carrying out carbonization condensation reaction at 180-300 DEG C for 2-32 hours; and after the reaction, washing with hot water at the temperature higher than 80 DEG C, filtering to remove free acidic materials, and drying the product in a baking oven at 120 DEG C to obtain the resorcinol formaldehyde resin base solid acid. The resorcinol formaldehyde resin base solid acid disclosed by the invention has the advantages of high thermal stability, high acid value, favorable catalysis effect and the like, and can be repeatedly used.

The invention provides an assembly type bamboo bridge. The assembly type bamboo bridge comprises bamboo longitudinal beams (1), bamboo transverse beams (2), bamboo panels (3), transverse pre-stressing tendons (4) and longitudinal pre-stressing tendons (16), the outer surface of a bamboo is sequentially and uniformly coated with a layer of waterborne polyurethane resin, a layer of polyurethane resin, a layer of waterborne polyurethane resin and a layer of resorcinol formaldehyde resin, and the expansion coefficients of the four coating layers are sequentially lessened from the outer surface of the bamboo to outside. The assembly type bamboo bridge provided by the invention has the advantages that the structural strength is large, the ductility is good, a selected material is environment-friendly, standardization degree and assembling degree of structural members are high, the structural integrity is good, the advantages of the material can be fully expressed, and the requirements on normal use and durability of a bridge structure can be met.

The invention relates to a resorcinol-formaldehyde resin/resorcinol-phenol-formaldehyde resin composite curing agent and a preparation method thereof. The composite curing agent is characterized by comprising the following components in parts by weight: 5-20 parts of polyformaldehyde or hexamethylenetetramine, 5-20 parts of starch or soybean protein isolate and 5-20 parts of inorganic substance powder. The composite curing agent has the advantages of normative technique and the like, and is simple to operate and easy to implement. The active period of the composite curing agent is more than 4 hours when being compounded with the resorcinol-formaldehyde resin and resorcinol-phenol-formaldehyde copolymer resin; and the composite curing agent can satisfy the requirements for active period of HLULAM, wood glulam beams, wood glulam columns, I beams and other wood structure components as well as large-size wood glulam furniture and other products with various shapes and sizes (especially irregular shapes and large size), and enables the bonded structure to have excellent physical and mechanical properties and weather resistance.

The invention relates to nitrogen-doped hollow carbon spheres as well as a preparation method and application thereof, and belongs to the technical field of organic/inorganic hybrid materials. The technical problems that in the prior art, a carbon dioxide capture solid adsorbent is high in cost, complex in synthesis process and limited in application are solved. The nitrogen-doped hollow carbon spheres are prepared by the following steps: coating silicon dioxide nanospheres with nitrogen-containing resorcinol formaldehyde resin, carbonizing to obtain silicon dioxide core carbon spheres, enhancing the porosity by KOH and g-C3N4, carrying out nitrogen-doped activation to obtain activated silicon dioxide core carbon spheres, and removing silicon cores by HF. The nitrogen-doped hollow carbon spheres are uniform in particle size, have a unique hollow structure, a large BET surface area and graded porosity, rich pyridine N sites are exposed on a carbon shell, accessibility of nitrogen sitescan be enhanced, mass migration of objects is facilitated, interaction force between the nitrogen-doped hollow carbon spheres and CO2 gas is facilitated, and the nitrogen-doped hollow carbon spheres have efficient selective capture on CO2 in multi-element gas.

Belonging to the technical field of electromagnetic microwave shielding materials, the invention discloses a preparation method of a C@Ni composite material and an electromagnetic shielding film. Thepreparation method of the C@Ni composite material includes the steps of: mixing ammonia water with an ethanol aqueous solution, adding a formaldehyde solution and resorcinol, performing stirring, andcarrying out standing hydrothermal reaction, then taking out the precipitate, conducting cleaning and drying to obtain a monodisperse resorcinol-formaldehyde resin ball, and performing calcination toobtain a precursor ball C, preparing the precursor ball C into an aqueous solution, adding a water-soluble nickel salt and a reducing agent, carrying out standing hydrothermal reaction, then taking out the precipitate, and performing cleaning and drying to obtain the C@Ni composite material. The electromagnetic shielding film is obtained by physical combination of the obtained C@Ni composite material with a macromoleclar polymer polyvinylidene fluoride. The C@Ni electromagnetic shielding film obtained by the invention can realize conversion of electromagnetic energy flow to heat energy, potential energy and other forms of energy by magnetic hysteresis loss, dielectric loss, resistance loss and other mechanisms, and reach the effect of shielding and absorbing electromagnetic wave.