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.

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.

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 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.

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 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 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 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 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.

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.