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

The invention relates to a formaldehyde-free soybean protein adhesive, which comprises the following components in parts by weight: 32 parts of soybean powder, 68 parts of a dispersion medium, 3-5 parts of a crosslinking agent and 0.3-0.6 parts of a reinforcing agent; the dispersion medium It is an oxidized glucose-choline chloride deep eutectic solvent, the reinforcing agent is modified feather protein crystal, and the crosslinking agent is modified polyurethane. The present invention also relates to a preparation method of the above-mentioned formaldehyde-free soybean protein adhesive. The formaldehyde-free soybean protein adhesive of the present invention can be prepared by mixing and stirring various raw materials at room temperature, and has the advantages of high preparation efficiency, no release of harmful substances, high product reactivity, easy formation of cross-linked network structure, and high cross-linking density , After curing, it has the characteristics of good water-resistant bonding performance, good solubility and dispersion, and good water retention. The board prepared and produced by using the above-mentioned formaldehyde-free soybean protein adhesive can meet the quality requirements of wood-based panels.

The invention discloses a tough formaldehyde-free soybean meal-based wood adhesive and a preparation method thereof, comprising the following components in parts by weight: 30-33 parts by weight of main agent, 70 parts by weight of dispersion medium water, and 3-6 parts by weight of reinforcing agent , 0.1-0.2 parts by weight of a viscosity regulator, 2-4 parts by weight of a crosslinking agent, and 0.3-0.6 parts by weight of a catalyst; the preparation process is as follows: first weigh each component according to the weight ratio, and add the crosslinking agent to the dispersion medium water , then add the main agent and reinforcing agent, use a high-pressure homogenizer, under the action of 30MPa pressure and 0.5MPa emulsifying force, homogeneously emulsify for 20 minutes; then add the catalyst to the prepared mixture, and react at 80°C for 30min, Lower the temperature at 30°C and discharge; the adhesive of the present invention is easy to form a cross-linked structure, has a high cross-linking density, and a low reaction temperature. The performance of the prepared adhesive is stable, the weak interface layer is significantly reduced, the cost is reduced, the dry / wet strength is good, and the product quality Steady improvement.

The invention discloses a formaldehyde-free soybean protein-based adhesive and a preparation method thereof, wherein the adhesive includes soybean meal powder, bromelain, soybean shell polysaccharide enzyme, dispersion medium water, sodium periodate, diethylenetriamine, ammonium Dialdehyde diglycidyl ether and curing agent. By adopting the preparation method of the present invention, the obtained formaldehyde-free soybean protein-based adhesive, the soybean meal molecules are firstly degraded and then modified and recombined to form a prepolymer, so that the protein is fully stretched, the molecular active groups are significantly increased, the reactivity is improved, and the solubility and Water retention is improved and toughness is increased. After adding an elastomer-based curing agent, the adhesive prepared has high toughness, high water-resistant bonding performance, and high stability; it can meet the water-resistant requirements of wood-based panel adhesives and reduce the amount of cross-linking agent. The cost of the adhesive ensures the practical performance of the protein adhesive.

The invention discloses a bio-based protein adhesive for wood-based panels and a preparation method thereof, comprising the following components: a main agent, dispersion medium water, a reinforcing agent, a viscosity regulator, a crosslinking agent, and a catalyst; Feather protein powder, the dispersion medium water is common tap water or demineralized water, the reinforcing agent is surface-modified nano-kaolin, the viscosity regulator is polyacrylamide, and the cross-linking agent is epoxidized bark extract , the catalyst is aqueous sodium hydroxide solution. The above-mentioned chemical reagent combination treatment method can effectively open the highly cross-linked disulfide bonds in feather proteins, increase the reactivity of feather proteins, and facilitate the formation of cross-linked structures between cross-linking agents and protein molecules. Nano-kaolin can be chemically bonded to cross-links. In the structure, the water-resistant bonding performance of the adhesive is further improved through stress conduction and dispersion.

The invention discloses a starch adhesive and a preparation method thereof, comprising the following components in parts by weight: 38-42 parts by weight of a main agent, 60 parts by weight of dispersion medium water, 1-1.5 parts by weight of a reinforcing agent, and 0.1 parts by weight of a viscosity modifier. -0.3 parts by weight, 5-8 parts by weight of cross-linking agent, 0.3-0.6 parts by weight of catalyst; the starch adhesive is prepared by the following method: firstly weigh each component according to the weight ratio, add the reinforcing agent into the dispersion medium water, Ultrasonic for 15 minutes, then add half the weight of the main agent, use a high-pressure homogenizer, under the action of 30MPa pressure and 0.5MPa emulsifying force, homogenize and emulsify for 20 minutes; then add the remaining main agent to the obtained mixture. Then add the crosslinking agent and sodium hydroxide, react at 80°C for 30 minutes, and cool down to 30°C for discharging; the adhesive of the present invention is easy to form a crosslinking structure, the crosslinking density is large, the reaction temperature is low, and the performance of the prepared adhesive is stable and weak. The interface layer is obviously reduced, the cost is reduced, the dry / wet strength is good, and the product quality is steadily improved.

The invention discloses an aldehyde-free flour-based adhesive and a preparation method thereof. 0.1-0.3 parts by weight of the regulator, 8-12 parts by weight of the crosslinking agent, and 0.5-1 parts by weight of the catalyst; prepared by the following method: weighing each component according to the weight ratio, adding the reinforcing agent to the dispersion medium water, and ultrasonicating for 15 minutes , and then add half the weight of the main agent, use a high-pressure homogenizer, under the action of 30MPa pressure and 0.5MPa emulsifying force, homogeneously emulsify for 20 minutes; add the remaining main agent to the mixture obtained above, mix well and then add cross-linking The adhesive and the remaining catalyst were reacted at 80°C for 30 minutes, and the material was discharged at a temperature of 30°C; the adhesive of the present invention is easy to form a cross-linked structure, has a high cross-linking density, a low reaction temperature, a simple preparation method, and the prepared adhesive has stable performance and weak interface. Significant drop in ply, lower cost, good dry / wet strength, and stable improvement in product quality.

The invention discloses a tough soybean meal protein adhesive and a preparation method thereof. The tough soybean meal protein adhesive is composed of the following raw materials in parts by weight: soybean meal powder, trypsin, dispersion medium water, sodium periodate, and triethylenetetramine , dodecyl glycidyl ether and curing agent. The tough soybean meal protein adhesive prepared by the method of the present invention: the soybean meal molecules are firstly degraded and then modified and recombined to form a prepolymer, so that the protein is fully stretched, the molecular active groups are significantly increased, the reactivity is improved, and the solubility and water retention are improved. , Increased toughness, the adhesive prepared after adding curing agent has high water-resistant bonding performance and high stability; it can meet the water-resistant requirements of wood-based panel adhesives, reduce the amount of cross-linking agent, thereby reducing the cost of adhesives and ensuring protein adhesion The practical performance of the agent.

The invention discloses a formaldehyde-free bean gum and a preparation method thereof. The formaldehyde-free bean gum is composed of the following raw materials in parts by weight: soybean meal powder, trypsin, soybean shell polysaccharide enzyme, dispersion medium water, sodium periodate, triethylene tetra Amines, Glycol Diglycidyl Ether and Hardener. The advantages of the formaldehyde-free soybean gum prepared by the present invention are that the soybean meal molecules are firstly degraded and then modified and recombined to form a prepolymer, so that the protein is fully stretched, the molecular active groups are significantly increased, the reactivity is improved, and the solubility and water retention are improved. The adhesive prepared after the curing agent has high water-resistant bonding performance and high stability; it can meet the water-resistant requirements of the wood-based panel adhesive, reduce the amount of cross-linking agent and reduce the cost of the adhesive, and ensure the practical performance of the protein adhesive.

The invention discloses a formaldehyde-free protein adhesive and a preparation method thereof, because the formaldehyde-free protein adhesive is composed of the following raw materials: defatted soybean meal protein powder, trypsin, fig protease, dispersion medium water, sodium periodate, three Ethylene tetramine and ethylene glycol diglycidyl ether. Among them, the protein molecule is firstly degraded and then modified and recombined to form a prepolymer, so that the protein is fully stretched, the molecular active group is significantly increased, the reactivity is improved, and it is easy to react with the cross-linking agent, and the solubility and water retention are improved. Therefore, the method of the present invention is adopted The adhesive prepared by the preparation method has high water-resistant bonding performance and high stability; it can meet the water-resistant requirements of wood-based panel adhesives, reduce the amount of cross-linking agent and thereby reduce the cost of the adhesive, and ensure the practicality of the protein adhesive. performance.

The invention discloses a high water resistance, low modulus one-component MS sealant and a preparation method thereof. The high water resistance and low modulus one-component MS sealant consists of the following components in parts by weight: basic MS resin 20 ~50 parts; plasticizer 20~50 parts; inorganic filler 50~150 parts; thixotropic agent 3~10 parts; weather resistance agent 2~8 parts; water resistant adhesive 1~5 parts; catalyst 0.05~1.0 parts; MS 0.5-3 parts of special color masterbatch for sealant; adding silane low polymer water-resistant adhesive can not only improve the water resistance of MS sealant, but also reduce the modulus of MS sealant. The MS sealant of the present invention has excellent adhesion to assembled concrete components, low modulus, and high water resistance. After immersion in water for 10 days without primer, it will be broken and bonded to 100% cohesive failure of MS sealant. There is no damage to the stretch bonding, which can significantly improve the sealing and waterproof performance of prefabricated buildings, and can be widely used in the joints of prefabricated buildings.

The invention relates to the technical field of biomass adhesives, and specifically discloses an antibacterial soybean meal adhesive and a preparation method and application thereof. The antibacterial soybean meal adhesive of the present invention comprises soybean meal, water, a performance enhancer and a crosslinking agent; the performance enhancer is obtained by crosslinking reaction of polyethyleneimine, polyvinyl alcohol and carboxymethyl chitosan ; The cross-linking agent is a cross-linking agent that enables the soybean meal and the performance enhancer to be cross-linked through Maillard reaction. The soybean meal adhesive has good dry and wet strength, excellent antibacterial and antifungal properties, mild heat treatment conditions during processing, and short curing time, and is favorable for industrial application.

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.