38results about How to "Improve water resistance bonding performance" patented technology

The invention discloses a tough aldehyde-free soybean meal-based wood adhesive and a preparation method thereof. The adhesive comprises, by weight, 30-33 parts of a main agent, 70 parts of dispersed medium water, 3-6 parts of a reinforcing agent, 0.1-0.2 part of a viscosity regulator, 2-4 parts of a crosslinking agent and 0.3-0.6 part of a catalyst. The preparation method comprises the following steps of weighing each component according to the corresponding weight ratio first, adding the crosslinking agent into the dispersed medium water, adding the main agent and the reinforcing agent, and homogenizing and emulsifying the mixture for 20 minutes under the action of an emulsifying force of 0.5 MPa at the pressure of 30 MPa through a high-pressure homogenizer; then, adding the catalyst into the obtained mixture, triggering a reaction at 80 DEG C for 30 minutes, cooling a finished product to 30 DEG C, and then discharging the finished product. The adhesive is likely to form a crosslinking structure, high in crosslinking density and low in reaction temperature; the prepared adhesive is stable in performance, the weak interface layer is obviously reduced, the cost is lowered, the dry/wet strength is high, and the product quality is stably improved.

The invention relates to a preparation method of a formaldehyde-free soybean meal-based wood adhesive for artificial boards, and belongs to the technical field of adhesives. According to the invention, renewable resources, namely soybean meal, are used as raw materials, a water phase is selected as a solvent, and a process step of an alkali-acid two-step method is adopted. Epoxy resin, dicyandiamide, low-molecular-weight polyamide and soybean protein are combined for modification, a chemical reaction is carried out at the same time, and therefore the formaldehyde-free soybean meal-based wood adhesive with very high water resistance and bonding strength is prepared; the adhesive has the advantages of no formaldehyde, low viscosity, good cold pressing performance, low cost, high adhesive strength and the like; the adhesive does not volatilize formaldehyde, phenol or other harmful substances, has the characteristic of no formaldehyde, and is safe and environment-friendly, and the preparedsoybean meal-based wood adhesive is low in viscosity, convenient for applying, good in coating and pre-pressing performance, easy to spray and apply, convenient for repairing of plywood and capable of preventing a shaving board from being scattered, and the problems that a soybean adhesive is high in viscosity and difficult to spray are solved.

The invention discloses a non-formaldehyde albumin adhesive and a preparation method thereof, and relates to the technical field of artificial board adhesives. The non-formaldehyde albumin adhesive isprepared from the following raw materials: feather meal, bromelain, dispersion medium water, an activating agent, ethylene glycol diglycidyl ether and a curing agent. The non-formaldehyde albumin adhesive prepared from the raw materials is small in molecular weight, high in activity, good in solubility, capable of being self-enhanced, high in waterproof adhesion performance and high in stability;a prepared board can meet the requirement on water resistance of the artificial board adhesive; the preparation method is low in cost and easy to implement.

The invention discloses a formaldehyde-free soybean protein based adhesive and a preparation method thereof. The adhesive is prepared from soybean meal, bromelain, bean chitinase, dispersion medium water, sodium periodate, diethylenetriamine, glutaraldehyde diglycidyl ether and a curing agent. According to the formaldehyde-free soybean protein based adhesive obtained with the preparation method, soybean meal molecules are degraded, modified and recombined to form a prepolymer, proteins stretch sufficiently, molecular active groups are increased obviously, reactivity, solubility, water-retention and toughness are improved, and after addition of an elastomer-based curing agent, the prepared adhesive has high flexibility, water-resistant adhesion and stability; the requirement of an artificial board adhesive for water resistance can be met, cost of the adhesive is reduced due to reduction of use quantity of a crosslinking agent, and practicability of the protein based adhesive is guaranteed.

The invention discloses a soybean meal lignin-based adhesive and a preparation method thereof. The soybean meal lignin-based adhesive is prepared from 20-50 parts of defatted protein powder, 1-5 parts of a denaturant, 1-30 parts of a reinforcing agent and 60-80 parts of a dispersion medium. The preparation method comprises the steps of dispersing, mixing, stirring and the like. The soybean meal lignin-based adhesive and the preparation method thereof have the following advantages: the problems of poor water resistance, low dry cementation strength and poor boiling resistance of a common protein adhesive are solved, the water-proof requirement of an adhesive for artificial boards can be satisfied, and the practicability of the protein adhesive is guaranteed; the problem of exhaustion of synthetic fossil raw materials used in conventional artificial board adhesives can be favorably solved, and the environmental protection and sustainable development principles can be conformed; resources are comprehensively utilized, the production cost is lowered and the product added value is improved.

The invention discloses a bio-based protein adhesive for an artificial board and a preparation method thereof. The bio-based protein adhesive comprises the following components: a main agent, dispersion medium water, a reinforcing agent, a viscosity regulator, a cross-linking agent and a catalyst; wherein the main agent is deconstructed feather protein powder, the dispersion medium water is commontap water or softened water, the reinforcing agent is surface-modified nano kaolin, the viscosity modifier is polyacrylamide, the cross-linking agent is an epoxidized bark extract, and the catalyst is a sodium hydroxide aqueous solution. According to the present invention, with the chemical reagent matched treatment method, the highly-crosslinked disulfide bond in the feather protein can be effectively opened, such that the reaction activity of the feather protein is increased, and the cross-linking agent and the protein molecule can easily form the cross-linking structure; besides, the nano-kaolin can be chemically bonded to the cross-linking structure, and thereby the water-resistant bonding performance of the adhesive is further improved through stress conduction and dispersion.

The invention discloses an aldehyde-free flour-based adhesive and a preparation method thereof. The adhesive comprises the following components, by weight: 38-42 parts of a main agent, 60 parts of disperse medium water, 0.4-0.8 part of a reinforcing agent, 0.1-0.3 part of a viscosity regulator, 8-12 parts of a crosslinking agent, and 0.5-1 part of a catalyst. The adhesive is prepared by the following method: weighing the component according to a weight ratio, adding the reinforcing agent into the disperse medium water, carrying out ultrasound for 15 minutes, adding half weight of the main agent, and carrying out homogenization emulsification for 20 minutes with a high-pressure homogenizer under pressure of 30 MPa and an emulsifying force of 0.5 MPa; and adding the remaining main agent into the obtained mixture, after the main agent and the mixture are uniformly mixed, the crosslinking agent and the remaining catalyst are added, carrying out a reaction at 80 DEG C for 30 min, reducing the temperature by 30 DEG C, and then discharging a product. The adhesive of the invention has the advantages of easy formation of a crosslinking structure, large crosslinking density and low reaction temperature. The preparation method is simple. The prepared adhesive has the advantages of stable performance, obviously reduced weak interface layer, good dry/wet strength and stably improved product quality.

The invention discloses a glue-permeation-free plant protein sucrose-based environment-friendly adhesive for plywood. The adhesive comprises the following components in parts by weight: 100 parts of sucrose; 20-40 parts of ammonium dihydrogen phosphate; 3-4 parts of sodium pyrosulfite; 2-4 parts of sodium carboxymethyl cellulose; 0.03-1 part of sodium dodecyl benzene sulfonate; 4-5 parts of boric acid; 3-5 parts of potassium hydroxide; 0.5-2 parts of citric acid; 10-25 parts of defatted soybean protein; 10-25 parts of dephenolized cottonseed protein and 27-55 parts of water. The invention further discloses a preparation method of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive for the plywood and an application of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive to preparation of the plywood. According to the glue-permeation-free plant protein sucrose-based environment-friendly adhesive for the plywood as well as the preparation method and the application of the glue-permeation-free plant protein sucrose-based environment-friendly adhesive, the glue permeation defect occurring when a traditional sucrose-based adhesive is used for preparing the plywood is overcome, and the problem of glue permeation on the surface of the plywood is obviously solved.

The invention discloses a formaldehyde-free soybean meal based artificial board adhesive and a preparation method thereof. The formaldehyde-free soybean meal based artificial board adhesive is prepared from 60-70 parts of a dispersion medium, 20-35 parts of defatted soybean protein powder, 0.1-0.8 part of sodium hydroxide, 5-10 parts of polyethylene glycol, 0.5-3 parts of sodium bisulfite, 0.1-2.0parts of a crosslinking enhancer, and 1-5 parts of sodium benzoate. The preparation method includes: adding the defatted soybean protein powder, the crosslinking enhancer, sodium hydroxide, sodium bisulfite and polyethylene glycol into the dispersion medium, stirring the substances evenly, then conducting heat preservation at 60-80DEG C for 3-6h; and then cooling the obtained mixture to 25-35DEGC, adding sodium benzoate, and stirring the substances evenly. The method provided by the invention has the advantages of simple process and convenient operation, the produced adhesive is free of formaldehyde, the main raw materials come from renewable materials, and are safety and environment-friendly.

The invention discloses an aldehyde-free low-cost polysaccharide adhesive and a preparation method thereof. The aldehyde-free low-cost polysaccharide adhesive is prepared from the following componentsin parts by weight: 20-25 parts of a main agent, 55-60 parts of dispersed medium water, 6-16 parts of a crosslinking agent, 1-2 parts of a reinforcing agent and 1-3 parts of a viscosity regulator. The preparation method of the polysaccharide-based adhesive comprises the following steps: firstly, all the components are weighed according to the weight ratio, the reinforcing agent and the dispersedmedium water are mixed, and ultrasonic dispersion is conducted for 15 minutes; then, the main agent is added into a prepared solution, and a mixed solution is homogenized for 15 minutes under the pressure of 70 MPa through a high-pressure homogenizer; and finally, the crosslinking agent and the viscosity regulator are added into a mixture obtained in the second step successively, and even stirringis conducted. The adhesive prepared through the simple preparation method has the advantages of high crosslinking density, good water-resistance performance, high dry and wet strength, adjustable viscosity, low curing temperature and the like, the practical requirements for a plywood adhesive are met, the production cost is low, the preparation process is simple, large-scale mass production can be conducted, and development of the environment-friendly high-performance adhesive industry is promoted advantageously.