85results about How to "Reduce formaldehyde" 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 provides a type of marine organism shell powder paint, mainly comprising biosynthesis adhesive, sodium hexametaphosphate, shell powder, emulsifier, and citric acid mono. The marine organism shell powder paint is purely natural, environment-friendly, of simple preparation and of low manufacturing cost, and has no toxic effects on human body.

The invention discloses a formaldehyde-free amino resin retanning agent. The formaldehyde-free amino resin retanning agent is characterized by being formed as follows: firstly, obtaining an intermediate containing hydroxyl and aldehyde group residue in molecule by using an amino monomer and glutaraldehyde through nucleophilic addition; then, obtaining the formaldehyde-free amino resin retanning agent by a series of reactions such as sulfonation, hydrolyzed collagen end-blocking, condensation and etherification. The formaldehyde-free amino resin retanning agent provided by the invention is an amino resin condensation product containing an aldehyde group, has retanning performance comparable with that of the conventional amino resin retanning agent, has an aldehyde group capable of performing covalent cross-linking reaction with the amino on collagenous fiber in molecule, and can be used for improving the humidity and heat-resistant stability of finished leather. Formaldehyde is not used in a preparation process of the formaldehyde-free amino resin retanning agent, so that harms of formaldehyde in the finished leather can be greatly lowered.

The invention belongs to the field of board machining and provides a novel solid ecological bamboo board and a production process thereof. The novel solid ecological bamboo board comprises a cedarwood board core, middle boards, bamboo fiber boards and melamine impregnated paper. The upper surface and the lower surface of the cedarwood board core are covered with the middle boards through gluing and integrally pressed to form a board blank; the melamine impregnated paper is stuck to the bamboo fiber boards in a pressed mode to integrally form surface-layer substrates; the upper surface and the lower surface of the board blank are gelatinized and coated with the surface-layer substrates and integrally formed through hot pressing to obtain a finished product. The novel solid ecological bamboo board and the production process thereof have the advantages that 1, a novel assembly structure is adopted, and the hardness, nail-holding ability, static bending strength and surface evenness of the board are greatly improved; and 2, the bamboo fiber boards are adopted for the surface-layer substrates, the fracturing resistance and the thermocycling resistance of melamine ecological boards are greatly improved, and thus the melamine ecological board can meet the all-weather all-region using requirement; besides, the finished product is low in formaldehyde content, economical, environmentally friendly, and the advantages of water resistance, mould resistance, inflaming retarding, moth resistance and the like are achieved at the same time.

The present invention relates to bamboo manufacturing field, in particular, to a process for making a bamboo filament slab floor by opposite directional hot pressing. Aiming to overcome the defects that, while compressing, the existing bamboo filament slab floor at normal temperature under cold pressing is easy to rebound and expand, has low strength and weak resistance to abrasion and is easy to mildew while using for a long time, the present invention adopts shredding bamboo sheet, sizing treatment, moulding bamboo filament and etc. procedures, characterized in that, a secondary drying procedure should be inserted between said sizing treatment and bamboo filament moulding procedure; said sizing treatment should be implemented by soak sizing bamboo filament; said compressing includes opposite directional hot pressing of positive pressing and side pressing. The present invention adopts specific manufacturing technology, thus the floor can avoid the occurrence of holes and gaps inside bamboo filament slab floor and discharge formaldehyde and has stable quality, and will be not prone to mildew and deform while using for a long time. It can be widely used and suitable for indoor and outdoor flooring and various boards used in decoration and furniture.

The invention relates to a low-formaldehyde soaping-resistant adhesive for textile pigment printing and a preparation method thereof. The low-formaldehyde soaping-resistant adhesive is prepared from polyethylene glycol methacrylate, N-butoxy methacrylamide, acetoacetic acid ethyl methacrylate, sodium lauryl sulfate, acrylic acid, styrene, acrylate, ammonium persulfate and deionized water through emulsion polymerization. The content of free formaldehyde can be lower than 20 ppm; and the low-formaldehyde soaping-resistant adhesive has the advantages of soft feeling and high fastness soaping fastness.

The invention discloses a manufacturing method of short cycle wear-resistant decorative paper. The method comprises the steps of selection and pre-treatment of raw paper; uncoiling; pre-wetting; impregnation; first time drying press-sticking; preparation of coating glue; second time drying press-sticking; deviation adjustment traction, and cutting; the quality of the short cycle wear-resistant decorative paper manufactured with the method is high, the curing time is shortened, the production efficiency is improved, the uniformity of impregnation and gluing of the short cycle wear-resistant decorative paper is guaranteed in the manufacturing process, the flexibility of a glue layer and the sealing performance of the surface of the glue layer are guaranteed, and accordingly, the problems that the quality of the short cycle wear-resistant decorative paper is not high and the efficiency is low are fundamentally solved.

A production method for a polyacetal copolymer that makes deactivation of a catalyst simple and efficient and that achieves a high polymerization yield and high quality using equipment that does not require a cleaning step and a process that involves a simple operation technique. The production method for a polyacetal copolymer uses trioxane as a main monomer and a cyclic ether and/or a cyclic formal having at least one carbon-carbon bond as a comonomer. In the production method, a predetermined heteropoly acid is used as a polymerization catalyst to perform copolymerization, a predetermined salt is added to the reaction product, melt kneading processing is performed, and the polymerization catalyst is deactivated.

The invention relates to the technical field of adhesive, in particular to adhesive for indoor plywood. The adhesive comprises, by weight, 50-70 parts of urea resin, 10-20 parts of silicone rubber, 8-15 parts of octyl phenol polyoxyethylene ether, 20-30 parts of polyaspartic acid, 2-4 parts of calcium sulphoaluminate, 10-20 parts of propylene glycol, 8-13 parts of sodium stearate, 6-12 parts of porous inorganic filler, 3-8 parts of polyvinyl acetate emulsion, 1-5 parts of nano-silica and 5-10 parts of water. The adhesive for the indoor plywood is good in viscosity, has the antiseptic and anti-static functions and contains lower formaldehyde, the water resistance and aging resistance of the adhesive are improved greatly, and the service life of the adhesive is prolonged by half a year to one year. The adhesive is mainly applied to bonding of the inner plywood.

The invention relates to a waterborne matte environment-friendly canvas coating material with high weather resistance. The waterborne matte environment-friendly canvas coating material is prepared from deionized water, cellulose, dispersant, a wetting agent, a defoaming agent, AMP-95, titanium dioxide, diatomite, heavy calcium, gaseous silicon dioxide, waterborne acrylate copolymer emulsion, film-forming additive, cosolvent, photocatalyst material, epoxy silane, ultraviolet absorber, bactericide, mildew inhibitor and thickening agent. The waterborne matte environment-friendly canvas coating material with high weather resistance overcomes the defects that the existing canvas coating material is not environment-friendly, is high in VOC and high in gloss, and does not have long-term weather resistance and mildew resistance and the like. The matte environment-friendly canvas coating material is low in gloss, photosensitive and soft; the matte environment-friendly canvas coating material has appropriate oleophobic effect, and the pigment diluent such as linseed oil is not easy to diffuse and permeate; the affinity with the a base material and pigments is high, and the adhesion is good;the waterborne matte environment-friendly canvas coating material is odorless, environment-friendly, low in -VOC, capable of removing formaldehyde, and capable of meeting the EN71-9 standard requirements; and a coating of the waterborne matte environment-friendly canvas coating material is resistant to yellowing, excellent in weather resistance and good in mildew resistant effect.

The invention relates to a wall surface assembly type ceramic tile structure and an installation method, and relates to the field of ceramic tile installation. The wall surface assembly type ceramic tile structure comprises a keel assembly, a decorative ceramic tile and a connecting assembly used for connecting the decorative ceramic tile and the keel assembly, wherein the connecting assembly comprises a connecting frame, a back plate, an inserting part and a driving part; the connecting frame sleeves the outer side of the decorative ceramic tile and is clamped into the keel assembly; the back plate is connected to one side, facing a wall body, of the decorative ceramic tile; a guide groove for the inserting part to slide is formed in one side, facing the decorative ceramic tile, of the back plate; the driving part is used for driving the inserting part to slide outwards; the connecting frame is provided with a through hole for the inserting part to penetrate through; and the decorative ceramic tile is provided with a connecting hole for the inserting part to penetrate through. The ceramic tile structure is beneficial to rapid replacement of the damaged decorative ceramic tile, other intact decorative ceramic tiles cannot be influenced, and the replacement cost is low.

The invention discloses a production process of an antibacterial laminated wood floor, and particularly relates to the technical field of wood floor production. The production process specifically comprises the steps of step 1, feeding raw materials into a processing factory for material preparation, and cutting a plate for preparation into plate blanks with the same size and the thickness of 1.2-3cm; and step 2, conveying the plate blanks obtained through cutting in the step 1 to a drying room to be dried, wherein the temperature controlled in the drying room is set to be 150 DEG C, and the drying time is 40-80 minutes. The wood floor manufactured through the production process is high in stability, not prone to water absorption, high in cracking resistance, capable of restraining and killing bacteria in the solid wood floor, capable of preventing the bacteria from damaging the solid wood floor, capable of effectively prolonging the service life of the floor, little in released formaldehyde, small in harm to the human body, simple in process, low in equipment requirement and high in operability, and has good social popularization and application.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, at least one aminoalcohol compound and least one antioxidant. Foams so produced emit low levels of both formaldehyde and acetaldehyde.

The invention relates to a method for preparing raw paper of facing paper from plant fibers. The method comprises the following steps: (1) preparing raw materials of plant fibers, inorganic fibers, sepiolite, EVA (Ethylene Vinyl Acetate) resin and a modifier; (2) adding water into plant fibers, stirring, then adding inorganic fibers, sepiolite, EVA resin and a modifier, and uniformly stirring to obtain a mixed material; (3) carrying out disc milling and pulping on the mixed material to obtain slurry; and (4) carrying out vacuum dehydration, squeezing dehydration and drying dehydration to prepare the raw paper of the facing paper. According to the invention, the environment-friendly, moisture-proof, antibacterial and formaldehyde-free process is prepared from the raw materials; the prepared facing paper is relatively good in flexibility and can be freely bent; the base paper is attached through the hot melt adhesive film, formaldehyde can be reduced, the film attaching process can be reduced, energy consumption is reduced, and the floor production period is shortened.

The invention discloses an aloe natural environmental-protection wall coating, which is characterized by being mainly prepared from the following ingredients (by weight): 200-340 parts of water, 130-250 parts of titanium dioxide, 20-80 parts of talcum powder, 1-4 parts of alkaloid, 2-8 parts of a dispersant, 1-4 parts of a wetting agent, 1-8 parts of an antifoaming agent, 100-240 parts of aloe-gel, 150-320 parts of an acrylic emulsion and 20-80 parts of vegetable glue. The coating has full film, has excellent effects in aspects of smell, environmental protection and performance, has good decorative function and environmental protection function, and is an aloe natural environmental-protection wall coating with excellent comprehensive properties.

The invention relates to environment-friendly inner wall paint. The environment-friendly inner wall paint comprises fatty acid latex paint, alcohol-soluble acrylic resin, n-butyl alcohol, shell powder, ethanol, a dispersing agent, a defoaming agent, an anti-settling agent, ethylene glycol, a pH regulator, sterilizing anti-mildew agent, eucalyptus oil, tea tree oil, lemon eucalyptus oil, litsea cubeba oil, perilla oil, camphor oil, capsaicin and fructus cnidii. The environment-friendly inner wall paint has the advantages that the various components are reasonably combined to obtain the environment-friendly inner wall paint which is harmless to human bodies and can adsorb and reduce formaldehyde and volatile harmful gas in air; meanwhile, the environment-friendly inner wall paint is low in heat conductivity, capable of achieving energy saving and thermal insulation, good in construction performance, good in adhesive force, good in leveling property, resistant to aging, capable of preventing the invasion and harassment of mice and ants and suitable for being popularized and used.

The invention discloses a high molar ratio environment-friendly phenolic resin glue and its preparation method and application. The phenolic resin glue is prepared from the following components: phenol with a mass fraction of 98%, formaldehyde aqueous solution with a mass fraction of 37%, caustic soda, Process water, coupling agent, melamine. P:F=1:(2.18-2.25) of the present invention, the amount of formaldehyde added is higher than that of ordinary phenolic resin glue formula, which saves the amount of phenol and reduces the production cost; the preparation process makes phenol and formaldehyde go through multiple polycondensation The reaction is divided into three feedings, the chemical reaction is more thorough, and the curing temperature is lower, the amount of free formaldehyde and phenol in the phenolic resin glue is small, and no toxic substances are released during the preparation process, which is harmless to the human body and beneficial to environmental protection; the present invention The phenolic resin glue has great industrial application value.

The invention relates to a preparation method of a mixed-material glue-free composite material based on high-frequency waves. The method is characterized in that at least two wood boards with densities not exceeding 0.7 kg/m3 are heated and pressed through the high-frequency waves, so that a degraded connection layer is formed between the two adjacent wood boards. The preparation method specifically comprises the following steps of pretreatment, laminating treatment, heating and pressurizing treatment, curing treatment, cooling treatment and health preservation treatment. The novel composite material prepared by the method has the characteristics of high strength, high toughness and low content of formaldehyde and xylene, and also has waterproof and anti-cracking performances.