91 results about "Hexa(methoxymethyl)melamine" patented technology

The invention discloses a preparation method for hexakis (methoxymethyl) melamine resin, namely, in the first step; 92% polyformaldehyde, melamine and methanol are reacted in alkaline environment through hydroxymethylation to generate the intermediate product hexamethylolmelamine crystals; in the second step, the intermediate product and methanol are reacted with organic acid through etherification to prepare the hexakis (methoxymethyl) melamine resin. The method of the invention is non-polluting, odorless and easy to operate. The hexakis (methoxymethyl) melamine resin produced through the method of the invention is stable and non-crystalline, which is used in coiled materials and baking varnish, with very good cross-linking effect.

Surface-modified nanoparticles are produced by associating ligand interactive agents with the surface of a nanoparticle. The ligand interactive agents are bound to surface modifying ligands that are tailored to impart particular solubility and / or compatibility properties. The ligand interactive agents are crosslinked via a linking / crosslinking agent, such as hexamethoxymethylmelamine or a derivative thereof. The linking / crosslinking agent may provide a binding site for binding the surface modifying ligands to the ligand interactive agents.

The invention discloses a preparation method for preparing hexamethoxyl methyl melamine resin through a continuous process, and belongs to the field of organic synthesis. The preparation method comprises the following steps: 1) carrying out continuous reaction on melamine and a formaldehyde water solution by taking inorganic base as a catalyst to obtain hexahydroxy methyl melamine; 2) carrying out continuous vacuum drying on the hexahydroxy methyl melamine until the water content is less than 1%, and smashing; 3) regulating the pH of the hexahydroxy methyl melamine and methanol by use of an organic acid, and carrying out a continuous etherification reaction; 4) continuously distilling a product obtained from the etherification reaction, and removing impurities to obtain the hexamethoxyl methyl melamine resin (II). According to the process, the organic base is adopted for replacing a conventional inorganic base as a catalyst in hydroxymethylation, so that production is more stable, and melamine is used; the organic acid is used as a catalyst in esterification, which is beneficial to oxidation and neutralization in the later period of reaction. An oxidizing agent is adopted to terminate the esterification, so that the product is free from generation of solid salt and free from precipitation of solid after low-boiling-point substances are recovered, thus omitting solid and liquid separation.

Surface-modified nanoparticles are produced by associating ligand interactive agents with the surface of a nanoparticle. The ligand interactive agents are bound to surface modifying ligands that are tailored to impart particular solubility and / or compatibility properties. The ligand interactive agents are crosslinked via a linking / crosslinking agent, such as hexamethoxymethylmelamine or a derivative thereof. The linking / crosslinking agent may provide a binding site for binding the surface modifying ligands to the ligand interactive agents.

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 water-based acrylic amino baking varnish for making barrels and a preparation method thereof. The water-based acrylic amino baking varnish for making barrels comprises the following components in parts by mass: 20-40 parts of epoxy modified acrylic resin, 2-5 parts of methyl etherified high imino melamine resin, 2-5 parts of hexamethoxymethyl melamine resin, 3-5 parts ofa cosolvent, 1-2 parts of blocked aqueous isocyanate, 1-3 parts of a pH adjuster, 0.2-0.4 part of a de-foaming agent, 0.5-1.5 parts of dispersant, 0.3-0.5 part of a substrate wetting agent, 20-30 parts of deionized water, 0.2-0.4 part of a flatting agent, and 3-30 parts of pigment. The baking varnish has high gloss, high decorativeness, excellent hardness, good solvent resistance and weather resistance, low VOC content and very low odor.

The invention discloses high-performance acrylic ester modified water-based polyurethane emulsion paint. The paint is prepared from, by weight, 50-100 parts of acrylic ester modified polyurethane emulsion, 5-20 parts of water-based alkyd resin, 5-15 parts of nanometer silica sol, 15-30 parts of pigment filler, 5-10 parts of propanediol, 5-10 parts of n-caprylic alcohol, 2-5 parts of hexamethyl-disilazane, 5-10 parts of cellulose nanocrystalline, 0.5-3 parts of polyacrylamide, 5-15 parts of coalescing agents, 0.5-3 parts of antifoaming agents, 0.5-1.5 parts of sodium hexametaphosphate, 1-3 parts of benzotriazole, 1.5-3 parts of tributyl phosphate, 0.5-1.5 parts of triphenyl phosphate, 1-3 parts of hexakis methoxymethyl melamine resin, 0.5-2 parts of palm oil and 50-70 parts of deionized water. The high-performance acrylic ester modified water-based polyurethane emulsion paint is good in water resistance and weather resistance and high in strength.

The invention provides a preparation method of a starch adhesive used for artificial board production, belonging to the technical field of preparation of adhesives. The invention provides a method for preparing an environment-friendly starch adhesive used for artificial board production by taking starch as a main raw material. The preparation process of the adhesive provided by the invention comprises the following steps of: carrying out acidolysis oxidation pre-treatment on starch milk, then performing cross-linking reaction on the starch milk with hexamethoxy methyl melamine resin under the action of a catalyst, adding polyvinyl alcohol and then warming and pasting, cooling and then adding an appropriate auxiliary, and finally obtaining environment-friendly non-toxic starch adhesive used for an artificial board. The adhesive prepared by adopting the preparation method provided by the invention has the advantages of high bonding strength, high water resistance, strong flowability and fast drying speed and can be widely applied to production of the artificial board.

The invention discloses a flame-retardant waterborne polyurethane coating. The flame-retardant waterborne polyurethane coating comprises the following raw materials by weight: 40 to 65 parts of diisocyanate, 10 to 25 parts of polytetrahydrofuran ether glycol, 15 to 30 parts of phosphorus modified diol, 2 to 5.5 parts of a hydrophilic chain extender, 2 to 5 parts of dimethyl silicone oil, 3 to 5.5parts of pentaerythritol, 0.1 to 0.2 part of dibutyltin dilaurate, 0.5 to 2 parts of triethylamine, 0.1 to 1.5 parts of ethylenediamine, 9 to 13 parts of gelatin, 0.1 to 1 part of calcium alginate, 2to 3.8 parts of hollow glass beads, 0.3 to 1.5 parts of cellulose nanocrystals, 0.1 to 0.8 part of graphene oxide, 3 to 8 parts of hexamethoxymethyl melamine resin, 0.1 to 0.8 part of an antifoaming agent and 10 to 35 parts of water. The flame-retardant waterborne polyurethane coating provided by the invention has good flame retardancy and excellent heat resistance.

This invention discloses a compound used for dope cross-linking agent: six methoxyl group methyl melamine. It solves puzzle of no way to synthesize high substituted degree methanol etherification melamine. First melamine and over dose formaldehyde under catalysis of manganese peroxide carry out methylolation reaction, gain intermediate product; secondly intermediate product and methanol under catalysis of manganese peroxide carry out etherification reaction, obtain six methoxyl group methyl melamine; this compound is a monomeric compound with six degree of functionality, has low molecular weight, high etherification degree, needle crystal shape. its melting point is 55 deg, possess wonderful stability, comprehensive intermiscibility; And its formaldehyde content is very low, has no injury to flesh, and is a green product.

The invention relates to a method for improving the etherification degree of hexa-methoxy methyl melamine resin, which is characterized in that methylal is added during the etherification, wherein the mole ratio of the methylal to hexamethylolmelamine is 0.5-10:1. The methylal reacts with carbinol and formaldehyde, water generated during system etherification can be reduced, so that the etherification can be conducted to facilitate the generation of ethers, and the etherification degree is greatly improved. By adopting the method, the etherification degree can be improved to 5.23 from original 4.83 and the resin quality can also be improved; in addition, the water reduction in a flushing system can influence and lessen the polycondensation among molecules to cause the reduction of the viscosity of products, thus the property of hexa-methoxy methyl melamine resin (HMMM resin) can be improved greatly; for instance, the invention is beneficial to prolonging the storage term of prepared coating and improving the bond property with rubber.

The invention relates to a drawing decorative film with the frosting effect. The decorative film is composed of a substrate, a release layer, a protective layer, a decorative layer and a bonding layer which are sequentially overlapped together. The release layer is formed by applying a coating liquid on the surface of the substrate through curing and drawing, wherein the coating liquid is prepared from the following materials in parts by weight: 20-30 parts of hex-methoxymethyl melamine resin, 5-10 parts of cellulose acetate propionate resin, 5-8 parts of organic silicon resin, 5-10 parts of an acid catalyst, 8-12 parts of silica powder, 2-4 parts of high-white aluminum silicate, 0.2-2 parts of a dispersing agent, 0.2-0.5 part of a flatting agent and 30-60 parts of a solvent. The frosting drawing texture of the decorative film is real, and the decorative film can be widely applied to surface decoration of high-grade plastic parts.

The invention relates to a preparation method of a crosslinking agent, and particularly relates to a preparation method of a hexamethoxymethyl melamine resin. The preparation method the technical processes of etherification, neutralization and distillation. According to the invention, inorganic acid is used as a catalyst, complete neutralization can be performed, no intermediate products can be generated, and the product purity can be kept.

The invention discloses mildewproof high-ultraviolet-resistance pressed bricks. The mildewproof high-ultraviolet-resistance pressed bricks are prepared from the raw materials: Portland cement 42.5, fluorocarbon resin, hexamethoxy methyl melamine resin, nano zinc borate, calcium oxide, calcium silicate, sodium sulfate, sodium silicate, lime paste, hydrophobic aerosil, mica powder, magnesium hydroxide, nano calcium carbonate, argil, pearlite, kaolin, basalt fibers, a silane coupling agent KH-570, medium sand, mildewproof modifying auxiliaries and a UV-resistant modifying filler. The pressed bricks disclosed by the invention have excellent mildewproof and UV-resistant performance.

The invention discloses a waterproof and heat-resistant baking varnish for photo frames. The raw materials include water-based hydroxyl acrylic modified saturated polyester resin, water-based acrylic modified polyester resin, water-based saturated polyester resin, hexamethoxymethylmelamine resin, Water-based pure acrylic resin, methyl etherified amino resin, silicone modified epoxy resin, silicone modified alkyd resin, pigment, filler, silane coupling agent KH‑560, dispersant, defoamer, leveling agent, Alignment agent, dimethylethanolamine, diethylene glycol monobutyl ether, and deionized water. The baking varnish of the invention has excellent waterproof and heat resistance properties.

The invention provides a surface treatment method of a tire bead steel wire of a radial tire. The tire bead steel wire is successively treated by the following working procedures including chemical hydrochloric acid washing, electrolysis sulfuric acid washing, electroless copper plating, paintcoat coating and drying, wherein chemical copper plating solution is aqueous solution of copper sulfate, magnesium stearate, sodium ethylene diamine tetracetate, alkylol amine, sodium dodecyl benzene sulfonate, sodium hypophosphite, hydrazine hydrate, boracic acid, sodium 3,3'-dithiodipropane sulfonate, lecithin and starch acetate. A paint formula adopted by paintcoat coating comprises coumarone resin, hexakis methoxymethyl melamine, benzotriazole, chloride natural rubber, phenolic resin, nanosilicon dioxide dispersoid, chlorinated polyethylene, methylbenzene and acetone. According to the treatment method, adhesive force between the tire bead steel wire and rubber can be enhanced, the surface rubber adhesion ratio of the steel wire after bonding is improved, and steel wire preservation time is prolonged.

The present invention relates to a coating for elastomeric linear profiles, where the coating comprises solid lubricant embedded into a polymeric matrix. It also relates to a wiper blade for windscreen wipers, comprising this type of coating, and also to a process for the production of an elastomeric linear profile coated according to the invention. The polymeric matrix with embedded solid lubricant is obtained by polymerizing, in the absence of polymeric binders, a mixture comprising the solid lubricant and low-molecular-weight crosslinking agent. In one embodiment, the matrix is obtained from the thermal polymerization of the low-molecular-weight crosslinking agent hexamethoxymethylmelamine. Examples of solid lubricants are graphite and HDPE.

The invention provides a waterborne scroll-steel coating and a preparation method thereof. The waterborne scroll-steel coating is prepared from primer and finish paint, wherein the primer is preparedfrom the following components: water, a dispersant, a wetting agent, epoxy modified acrylic resin, hexamethoxymethyl melamine resin, an acid catalyst, a pigment, a leveling agent, a pH (Potential of Hydrogen) regulator and a co-solvent; the finish paint is prepared from the following components: the water, the dispersant, the wetting agent, polyester modified acrylic resin, the hexamethoxymethyl melamine resin, the acid catalyst, the pigment, the leveling agent, the pH regulator and the co-solvent. The coating provided by the invention has the advantages of high T bending performance, punchingresistance, good post-processing performance, high rigidity, acid and alkali resistance, salt mist resistance, good weather resistance, low VOC (Volatile Organic Compounds), high economic benefits, no toxicity and environment protection.

The invention discloses a computer cable which comprises a cable core. The cable core comprises two insulation wires. Each insulation wire comprises a wire body and an insulation layer wrapping the wire body. A shielding layer and a sheath layer sequentially wrap the cable core, wherein the sheath layer is made of modified polyvinyl chloride materials including, by weight of parts, polyvinyl chloride, butadiene styrene rubber, butyl rubber, chloroprene rubber, silicon rubber, sulfur, a sulfurizing agent HTDM, a sulfurizing accelerator CZ, a sulfurizing accelerator TMTD, an anti-aging agent MBZ, an anti-aging agent SP, an anti-aging agent 4010NA, engine oil, DOP, DOA, coumarone resin, wollastonite, kieselguhr, zinc oxide, modified hollow microspheres, RF-90 resin, HMMM and zirconium oxide. The computer cable is excellent in fire resistance and mechanical performance.

The invention relates to a rubber adhesive and a preparation method and in particular relates to a preparation method of a rubber adhesive RA65. The preparation method comprises: adding white carbon black into a mixing stirrer; starting to stir and dropwise adding hexamethoxy methyl melamine; dropwise adding all the hexamethoxy methyl melamine within 10 minutes to 20 minutes and stirring for 10 minutes to 20 minutes; after standing, stirring for ten minutes again and discharging. According to the preparation method of the rubber adhesive RA65, provided by the invention, materials are added through a dropwise adding manner and are stirred again after standing, so that the stirring is sufficient.

The invention discloses a scratch and heat resistant ceramic glaze. Raw materials of the ceramic glaze include pottery clay, polymethacrylate, hydroxyl-containing acrylic resin, organosilicon resin, epoxy resin E-13, aluminum powder, nano-silica, nanometer titanium dioxide, chrysotile, ceramic powder, ethylene glycol butyl ether, hexamethoxy methyl melamine, dimethylethanolamine, isopropanol, sodium hexametaphosphate, butyl acetate, a silane coupling agent KH-550, a scratch-resistant filler and a heat resistance modification additive. The ceramic glaze has excellent resistance to scratch and heat.

The invention relates to a preparation method for continuously and stably producing highly etherified hexamethoxymethyl melamine, and mainly solves the problems of unstable quality, high content of free formaldehyde, high moisture and long reaction time of hexamethoxymethyl melamine in the prior art. The method comprises the following steps: continuously adding melamine, formaldehyde and a catalyst I into a double-screw reactor for hydroxymethylation reaction to obtain a material I; continuously feeding the material I into a vacuum drying machine for drying, and grinding the material I to obtain hexamethylol melamine powder II; continuously conveying the material II, methanol and a catalyst II into an etherification reaction kettle for etherification reaction to obtain a material III; continuously introducing the material III into a neutralization kettle, adding a terminating agent, and terminating the etherification reaction to obtain a material IV; and continuously distilling and filtering the material IV to obtain the final product hexamethoxymethyl melamine. According to the technical scheme, a relatively good technical effect is achieved.

The invention discloses a scrub-resistant and waterproof quartzite composite material for a cupboard tabletop. The composite material is prepared from the raw materials: calcined quartzite sand, hydroxy acrylic resin, aqueous saturated polyester resin, hydroxy acrylic resin, hexamethoxymethyl melamine resin, organosilicone modified alkyd resin, amino resin, ternary vinyl chloride-vinyl acetate copolymer, N-methyl pyrrolidone, polyvinyl acetate, cellulose acetate butyrate, an isocyanate curing agent, an accelerant, pigments, isophorone diisocyanate, dibutyl tin dilaurate, a silane coupling agent KH-560, a scrub-resistant filler and a waterproof filler. The composite material disclosed by the invention is applied to the cupboard tabletop and has excellent scrub-resistant and waterproof performance.

The invention discloses a stain resistant and anti-drop metal flash paint for photo frames. The raw materials include: fluorocarbon resin, a carboxymethyl cellulose acetate butyrate aqueous dispersion, a waterborne polyacrylate emulsion, organic silicon resin, epoxy resin E-12, aluminum powder, hydrophobic fumed silica, composite filler, ethylene glycol butyl ether, hexamethoxymethyl melamine, dimethylethanolamine, isopropyl alcohol, sodium hexametaphosphate, butyl acetate, a silane coupling agent KH-560, a dispersant, a leveling agent BYK-331, a wetting agent, a defoaming agent, xylene and deionized water. The metal flash paint provided by the invention has excellent stain resistance and anti-drop performance.

The invention discloses latex used for the production of tobacco used wood pulp non-woven, which consists of an adhesive, a cross-linking agent, water and a curing agent and a stabilizer; the adhesive is any one of the following substances: vinyl acetate, vinyl acetate copolymer, acrylic ester and acrylic copolymer or the mixture of vinyl acetate and vinyl acetate copolymer or the mixture of acrylic ester and acrylic copolymer; the cross-linking agent is any of the following substances: HMMM, polyfunctional aziridine, bifunctional end aziridine or closed isocyanate; the curing agent is ammonium chloride; and the stabilizer is ammonia water. Compared with the prior art, the tobacco used wood pulp non-woven produced with the latex has the advantages of higher humidity and strength, lower moisture regain, good compression elasticity, as well as good stiffness and filtering performance when being used as cigarette holder so that the cigarette is not apt to occur hot collapse or generate foreign odor when being smoked.

A chlorosulfonated polyethylene-styrene butadiene rubber heat-insulation waterproof coating is prepared from, by weight, 100 parts of a styrene butadiene rubber emulsion, 8-10 parts of a chloroprene rubber emulsion, 15-20 parts of hydroxyethyl methylacrylate, 8-10 parts of alkylresorcinol formaldehyde resin, 1-2 parts of hexakis(methoxymethyl)melamine, 3-5 parts of titanium dioxide, 3-5 parts of talcum powder, 30-40 parts of dimethyl carbonate, 4-6 parts of chlorinated polyethylene, 1-2 parts of sulfuric chloride, 0.5-1 part of benzoyl peroxide, 8-10 parts of pyridine, 1-2 parts of sodium tripolyphosphate, 2-3 parts of tributyl phosphate, 1-2 parts of Texanol, 0.5-1 part of 1,2-benzisothiazolin-3-one, 1-2 parts of hydroxymethyl cellulose, 8-10 parts of hollow glass beads and a proper amount of deionized water. The heat-insulation waterproof coating has the advantages of low cost, good heat insulation effect, good lighting degree, simple construction and good application prospect.

The invention discloses polyester-amino baking enamel for roll aluminum. The polyester-amino baking enamel comprises the following components in parts by weight: 20 to 40 parts of polyester resin, 4 to 10 parts of hexamethoxy methyl melamine resin, 3 to 5 parts of a cosolvent, 2 to 4 parts of blocked waterborne isocyanate, 1 to 3 parts of a pH regulator, 0.5 to 1 part of a defoamer, 0.5 to 1.5 parts of a dispersing agent, 0.3 to 0.5 part of a base material wetting agent, 20 to 30 parts of deionized water, 0.2 to 0.4 part of a flatting agent, and 3 to 30 parts of pigment. The invention aims atproviding the polyester-amino baking enamel for roll aluminum, finally achieves the performances of high flexibility and high fullness through the improvement of the compactness of coating, and meanwhile further achieves the purposes of reducing wastewater and exhaust emission and protecting the environment.

The invention discloses a white ink with superstrong covering properties. The white ink is prepared from the following raw materials by mass: 52-68 parts of polyester modified methylphenyl silicone resin, 25-40 parts of titanium dioxide, 1.5-4 parts of barium sulfate, 1.5-4 parts of silica, 2-5 parts of glass powder, 1.5-6 parts of xylene, 1.5-6 parts of cyclohexanone, 1.3-6.5 parts of hexakis(methoxymethyl)melamine resin, 1-5 parts of octylphenol polyoxyethylene ether, 1-5 parts of modified chlorinated polypropylene, 1-3 parts of polytetrafluoroethylene wax, and 1-3 parts of polydimethylsiloxane. The white ink provided by the invention selects polyester modified methylphenyl silicone resin as the binding material, which not only has the excellent thermal stability of methylphenyl silicone resin, but also has good flexibility of linear polyester. Titanium dioxide is selected as the pigment, not only has high covering power, high whiteness and strong mechanical strength, but also has excellent heat resistance, high temperature color retention and low thermal conductivity.

The invention discloses an environment-friendly humic acid mulching film. The humic acid mulching film comprises the following components in parts by mass: 40-90 parts of hydrochloric acid, 60-100 parts of nitric acid, 30-100 parts of sodium pyrophosphate, 40-90 parts of sodium hydroxide, 40-80 parts of cellulose glycolate, 30-100 parts of sodium lauryl sulfate, 30-80 parts of absolute ethyl alcohol, 40-90 parts of hexakis methoxymethyl melamine (HMMM), 40-90 parts of sodium silicate, 50-90 parts of glycerin and 100-120 parts of p-toluenesulfonic acid (TSA).