2690 results about "Phenolic aldehyde" patented technology

The present invention relates to coated particulate matter wherein the particles are individually coated with a first set of one or more layers of a curable resin, for example, a combination of phenolic / furan resin or furan resin or phenolic-furan-formaldehyde terpolymer, on a proppant such as sand, and the first set of layers is coated with a second set of one or more layers of a curable resin, for example, a novolac resin with curative. Methods for making and using this coated product as a proppant, gravel pack and for sand control are also disclosed.

The invention relates to the field of chemical coating, in particular to epoxy powder coating applied to material conveying steel belts in oilfield oil pumping pipelines or coal transportation in the oil industry. In a formula, the coating comprises the following components in percentage by weight: 32-56% of epoxy resin, 8-14% of curing agent, 30-50% of pigments and fillers, 2-10% of resin modifier and 2-6% of assistant, wherein the epoxy resin in the formula is bisphenol A type epoxy resin, a mixture of the bisphenol A type epoxy resin and phenolic aldehyde modified epoxy resin, and phenolic aldehyde modified epoxy resin, and the curing agent is phenolic hydroxyl resin. The epoxy powder coating disclosed by the invention belongs to fast-set anticorrosion and wear-resistant epoxy powder coating, has the granularity being 10-125 mu m, is applied under general curing conditions that the curing temperature is 180-200 DEG C and the curing time is 3-10min, can be regulated according to user needs and is superior to like products in anticorrosion performance, coating film mechanical performance and wear resistance, a preparation process is simple, the labour productivity can be obviously increased, and the epoxy powder coating is suitable for industrialized production.

The invention discloses a dark blue organic light-emitting material and a preparation method and application thereof. The dark blue organic light-emitting material contains a structural unit disclosedin the invention, wherein, M is B or Bi; X is O, S or NR4; R1-R4 are independently selected from connecting bonds or groups obtained from H-H, H-F, H-O-H, H-S-H, H-CN, saturated hydrocarbons, unsaturated hydrocarbons, fluorinated hydrocarbons, heterocyclic compounds, organoboron, organosilicone, alcohols, mercaptans, ethers, thioethers, phenols, thiophenol, aldehydes, ketones, amines, amides, nitriles or sulfones losing one or more H; R1-R3 are located at any substitution position on rings of the structural unit where R1-R3 are located, and the bond energy between the ring where R3 is locatedand M is greater than or equal to the bond energy between the ring where R2 is located and M. The dark blue organic light-emitting material containing the B / Bi-N main body structure has very narrow light-emitting spectrum and TADF properties; the color purity is high, and the stability is good.

The invention relates to a phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and a preparation method thereof. The preparation method comprises the following steps: synthesizing cardanol glycidol ether from cardanol and epoxy chloropropane under alkaline conditions, and hydrolyzing under acidic conditions to generate cardanol-base dibasic alcohol; by using the cardanol-base dibasic alcohol as the raw material, dropwisely adding oxydol to react under acidic conditions to obtain the epoxy cardanol-base dibasic alcohol, carrying out reaction on the epoxy cardanol-base dibasic alcohol and a phosphorus-containing flame retardant to obtain phosphorus-containing cardanol-base polylol; carrying out reaction on the phosphorus-containing cardanol-base polylol and isocyanate to obtain a phosphorus-containing cardanol-base polyurethane prepolymer; and mixing the phosphorus-containing cardanol-base polyurethane prepolymer with a phenolic resin, and sequentially adding a surfactant, a foaming agent and a curing agent, thereby obtaining the phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam thermal-insulation material. The mechanical properties of the phenolic foam thermal-insulation material are obviously enhanced. The flame-retardant element phosphorus is introduced into the polyurethane prepolymer, thereby solving the problem of degradation of foam flame retardancy due to the carbamate introduced into the phenolic foam.

The invention discloses a method for preparing a high phase ratio electric leakage resistant tracking index leadless compatible composite base copper-clad laminate CEM-3, which comprises the following process steps: using low brominated epoxy resin / phenolic aldehyde as a main curing agent, adding a filling material to prepare core material glue impregnated glass fiber paper, and preparing a core material by making the glass fiber paper in a semi-solidified state at a temperature of between 130 and 210 DEG C; adding aluminum hydroxide or magnesium hydroxide as the filling material into the epoxy resin / phenolic aldehyde to prepare a plus material glue impregnated glass fiber cloth, and preparing the plus material by making the glass fiber cloth in a semi-solidified state at a temperature of between 130 and 210 DEG C; and superposing 1 to 20 sheets of the core material, pasting the plus material on the surface of the core material, cladding a copper foil on the plus material, and performing hot press molding at a temperature of between 80 and 200 DEG C, a pressure of between 10 and 60 Kg / cm and a vacuum degree of -60 mmHg. The CEM-3 copper-clad laminate prepared by the method simultaneously has CT1 more than or equal to 600V, higher heat resistance and excellent CAF resistance, and overcomes the defects that a CEM-3 plate prepared by the prior art has the CT1 between 175 and 249 V and poor heat resistance and CAF resistance, thus the CEM-3 copper-clad laminate is more adaptive to long-term operations under wet conditions and has high heat resistance and electric reliability.