CN112175557A - Adhesive for ultra-wide grinding belt - Google Patents
Adhesive for ultra-wide grinding belt Download PDFInfo
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- CN112175557A CN112175557A CN202011012210.4A CN202011012210A CN112175557A CN 112175557 A CN112175557 A CN 112175557A CN 202011012210 A CN202011012210 A CN 202011012210A CN 112175557 A CN112175557 A CN 112175557A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09J161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C09J161/14—Modified phenol-aldehyde condensates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/28—Chemically modified polycondensates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses an adhesive for an ultra-wide grinding belt, which comprises two components, namely A and B, which are mixed in equal proportion, wherein the two components comprise: the component A comprises the following components in parts by weight: modified phenolic resin: 40-60 parts of defoaming agent: 0.5-1.0 part of dispersant: 0.2-0.5 part of organic montmorillonite: 1-3 parts, buffer: 0.3-0.5 part, preservative: 0.2-0.3 part; the component B comprises the following components in parts by weight: organic silicon modified epoxy resin: 20-30 parts of polypropylene fiber: 1-3 parts of coupling agent: 1-2 parts, accelerator: 2-5 parts of defoaming agent: 0.3-0.5 part of thixotropic agent: 1-2 parts of filler: 5-7 parts of a flame retardant: 0.5-0.8 parts of composite rare earth: 0.01-0.03 part; the adhesive has good impact resistance, strong anti-fatigue capability, high bonding strength and good construction performance in water-carrying environment.
Description
Technical Field
The invention relates to an adhesive, in particular to an adhesive for an ultra-wide grinding belt.
Background
In modern manufacturing, the requirements for surface treatment techniques and processes for workpieces are increasing, and new requirements are continuously being made for coated abrasive products known in the industry as "modern industrial teeth". The method mainly shows that the specialization degree of the product is higher and higher, the processing difficulty is higher and higher, and the processing precision is finer and finer, so that the high-tech content of the grinding tool product is also continuously improved, the product is required to continuously meet the requirements of increasingly developed modern manufacturing industry, and the development and innovation become the important factors for each coated grinding tool product manufacturer to carry out planned development.
In foreign countries, the abrasive belt grinding of coated abrasive products has become a new processing technology which is relatively complete and self-organized. The processing objects and the application fields of the method are gradually wide, and almost all engineering materials and mechanical equipment can be processed. The method has the characteristics of high processing efficiency, fine processing precision, wide application range, strong adaptability, low use cost, safe and convenient operation and the like, so that the method is popular with users. The products of China such as Germany, Japanese, American, Korean and Yiyi always occupy the leading position of the international market, and the products are continuously applied with new materials, research new technology and new methods, so that the products are high in specialization degree, comprehensive in performance, various in specification and variety, and especially always go ahead of the world in the aspect of high-grade products. Large-area metal plates, decorative plates, clean panels and the like need to be ground once to avoid the phenomenon of uneven surface roughness caused by a plurality of factors, so that the ultra-wide grinding abrasive belt with the door width of 1600-1900 mm becomes a high-end product newly released to the market in developed countries.
The adhesive is a key material of the coated abrasive product and determines the quality and performance of the coated abrasive product. Scientific research shows that 13 elements of 18 elements influencing the quality of the coated abrasive product are in the adhesive. The adhesive is the core material of the coated abrasive product, is also the most critical material and is the technical content of the product. At present, the adhesive is prepared by modified materials of phenolic resin; the phenolic resin is a synthetic high polymer material with excellent comprehensive performance, the raw materials are easy to obtain, the price is low, the process equipment is simple, the product has excellent mechanical property, heat resistance, cold resistance and insulating property, and the phenolic resin can be widely used as a molding compound, an adhesive, a coating and the like, and is the first choice of a coated abrasive product manufacturer. However, phenolic hydroxyl and methylene in the structure of the phenolic resin are easy to oxidize, the heat resistance is affected, the pure phenolic resin cannot meet the requirements of many high and new technical fields, and in order to meet the requirements of high and new technical fields such as precision machining, vehicle and ship manufacturing, electronic chemical industry, national defense military industry and the like, modification research is carried out on the phenolic resin by various methods, and the improvement of the bonding strength and the heat resistance of the phenolic resin is the research focus and the development direction of the composite modification of the phenolic resin.
Disclosure of Invention
The invention aims to solve the technical problem that the adhesive for the ultra-wide grinding belt has good impact resistance, strong fatigue resistance, high bonding strength and good construction performance in a water-carrying environment.
The technical scheme for solving the technical problems is as follows:
the adhesive for the ultra-wide grinding belt comprises a first component and a second component which are mixed in equal proportion, wherein:
the component A comprises the following components in parts by weight:
modified phenolic resin: 40-60 parts of defoaming agent: 0.5-1.0 part of dispersant: 0.2-0.5 part of organic montmorillonite: 1-3 parts, buffer: 0.3-0.5 part, preservative: 0.2-0.3 part;
the defoaming agent is an organic silicon defoaming agent; the dispersant is sodium polyacrylate; the buffer is sodium bicarbonate or sodium acetate; the preservative is a Rohm Hass LXE bactericide;
the component B comprises the following components in parts by weight:
organic silicon modified epoxy resin: 20-30 parts of polypropylene fiber: 1-3 parts of coupling agent: 1-2 parts, accelerator: 2-5 parts of defoaming agent: 0.3-0.5 part of thixotropic agent: 1-2 parts of filler: 5-7 parts of a flame retardant: 0.5-0.8 parts of composite rare earth: 0.01-0.03 part;
the coupling agent is a silane coupling agent; the promoter is phenol; the thixotropic agent is hydrophobic fumed silica with the surface treated by organic matters; the filler is at least one of calcium carbonate, silicate, sodium hexafluoroaluminate, potassium fluoborate, sodium fluoborate, calcium fluoride, sodium fluoride, calcium stearate or zinc stearate; the flame retardant is phosphoric triester.
The invention further defines the technical scheme as follows:
in the adhesive for the ultra-wide grinding belt, the composite rare earth comprises the following components in percentage by weight: y: 13-15%, Sc: 16-18%, Gd: 9-11%, Sm: 18-20%, Pr: 9-11 percent of La and the balance of 100 percent of the total weight of the components.
In the adhesive for the ultra-wide grinding belt, the organic silicon modified epoxy resin comprises the following components in percentage by mass: epoxy resin: 45-50%, deionized water: 15-20%, dibutyltin dilaurate: 10-12%, methyltriethoxysilane: 20-24%, and the sum of the above components is 100%.
The technical effect is that the epoxy resin has excellent adhesive force and low shrinkage; the corrosion resistance and the permeability resistance to water, medium acid, alkali, salt and solvent are better; the coating has good film-forming performance under various construction conditions; can be well mixed with various resins, fillers and additives to prepare a series of common anticorrosion adhesives; is easy to prepare pollution-free anticorrosive adhesive with water-based property, thick film property (high solid property and solvent-free property), and the like. It has also the disadvantages of poor weather resistance, easy pulverization, and poor ability to withstand strong acid, alkali, salt and solvent corrosive media at high temperatures. If the epoxy resin is modified, the defects can be obviously improved, the organic silicon modified epoxy resin is adopted in the invention, the organic silicon modified epoxy resin has the advantages of strong cohesive force, good chemical reagent resistance and the like, and the modified epoxy can enhance the water and ion permeation resistance of the adhesive and improve the binding force between the adhesive and a metal matrix, thereby improving the protective capability of the adhesive, and in addition, the strength of the adhesive can be increased, the adhesive force can be improved, the rheological property can be improved, and the cost can be reduced.
In the adhesive for the ultra-wide grinding belt, the polypropylene fiber is short fiber with the length of 3-5 mm.
In the adhesive for the ultra-wide grinding belt, the modified phenolic resin in the component A is prepared by the following method:
(1) treating paper-making black liquor with membrane, removing part of alkali and sugar, precipitating with sulfuric acid, press-filtering with plate frame to obtain solid lignin, drying at 50-55 deg.C for 20-22 hr, ball-milling, and sieving with 120 mesh sieve;
(2) uniformly mixing the solid lignin, the phenol and the sodium hydroxide aqueous solution in the step (1), heating to 80-90 ℃, cooling to 50-60 ℃ after reaction, continuously adding water and the sodium hydroxide aqueous solution, stirring for 10-12min, adding formaldehyde, slowly heating to 80-90 ℃, keeping the temperature for reaction for 30-40min, cooling to 70-75 ℃, continuously adding the sodium hydroxide aqueous solution, the formaldehyde and the graphite, heating to 90-95 ℃, keeping the temperature for reaction for 40-45min, and performing reduced pressure dehydration to obtain the modified phenolic resin.
In the adhesive for the ultra-wide grinding belt, the preparation method of the adhesive comprises the following steps:
(1) sending the modified phenolic resin and the organic montmorillonite into a dispersion cylinder, uniformly stirring for 10-30 minutes, then adding a defoaming agent, a dispersing agent and a buffering agent, starting a stirrer, slowly stirring at the stirring speed of 200-;
(2) mixing and stirring the organic silicon modified epoxy resin and the filler uniformly, stirring for 20-40min, adding the coupling agent and the polypropylene fiber, continuing to stir for 40-50min, adding the accelerator, the defoamer, the thixotropic agent, the flame retardant and the composite rare earth, continuing to mix and stir uniformly, and discharging;
(3) the component A and the component B are stirred and mixed evenly at the stirring speed of 100-.
The invention has the beneficial effects that:
the dispersant is added into the component A, and can increase the affinity among base materials, prevent the particles from flocculating, reduce the viscosity of the coating, firmly adsorb on the surfaces of the dispersed particles, provide good spatial repulsion, ensure that the particles can not agglomerate again due to van der Waals force after being fully dispersed under high-speed stirring, and ensure that an adsorption layer can not be peeled off from the surfaces of the particles to cause instability of a system when being subjected to external force, thereby optimizing the physical and chemical properties of the adhesive.
The composite rare earth has the advantages that the metal atomic radius of the rare earth elements is large, the rare earth has high activity, gaps among materials are easily filled, meanwhile, the rare earth elements are easily combined with elements such as oxygen, sulfur and the like to generate compounds with high melting points, the dispersibility and compatibility of the adhesive are improved to a certain extent by adding the composite rare earth, the product is uniformly mixed, and the flame retardance of the adhesive is also improved.
Montmorillonite is a clay mineral formed by stacking silicate sheets with negative electricity on the surface and with nanometer thickness by virtue of the electrostatic action between layers, and has a unique one-dimensional layered nano structure. The montmorillonite is not favorable for dispersion in epoxy matrix due to lipophobicity of montmorillonite caused by a large amount of inorganic ions between layers, and after organic modification, the hydrophilicity between montmorillonite layers can be changed into lipophilicity, the surface energy of montmorillonite can be reduced, the interlayer spacing of montmorillonite can be increased, and the chain or monomer of polymer can enter between layers, so that the nano composite material can be manufactured, and the impact resistance and fatigue resistance of colloid can be obviously improved.
According to the invention, the fiber reinforced polypropylene fiber is utilized, so that when the colloid bears external stress, external energy is greatly absorbed in the forms of microstructure deformation or interface peeling and the like, and thus the impact resistance and fatigue resistance of the colloid can be remarkably improved.
The hydrophobic fumed silica is used as a thixotropic agent, the adhesive has good construction performance, and the adhesive is particularly suitable for construction in a water-carrying environment. The hydrophobic fumed silica serving as the thixotropic agent can obviously improve the hydrophobicity and the water drainage of the adhesive and greatly reduce the adverse effect of external water on the interface bonding and the colloid curing of the adhesive.
The invention adopts the modified phenolic resin which is widely applied to the artificial board industry because of the advantages of strong adhesive force, good chemical stability, water resistance, strong heat resistance and the like, and the phenolic resin also has the defects of high release amount of free formaldehyde and free phenol, large brittleness, long curing time and the like. In addition, the raw material phenol for synthesizing the phenolic resin comes from petroleum which is a non-renewable resource. In the face of the disadvantages of increasing exhaustion of petroleum resources, annual increase of international oil prices, toxicity and carcinogenicity of free phenol and formaldehyde, researchers have been forced to find a renewable resource which is nontoxic and can partially or completely replace phenol. The lignin molecule has the advantages of a large amount of phenol structural units, wide sources, natural renewability, biodegradability, no toxicity, low price and the like, so that the lignin is used for partially or completely replacing toxic and expensive phenol to be used for synthesizing lignin modified phenolic resin adhesive and has important significance in the aspects of economic benefit and the like, the wet bonding strength of the adhesive prepared from the modified phenolic resin is 1.84MPa, 17-18% higher than that of the adhesive which is not modified, the viscosity reaches 940-one 980 mPas, the storage period is 70 days, and the modified phenolic resin can have antistatic property by adding graphite.
The adhesive has the advantages of good impact resistance, strong fatigue resistance, high bonding strength, good construction performance in a water-carrying environment, strong high temperature resistance, high flexibility and the like.
Detailed Description
Example 1
The embodiment provides an adhesive for ultra-wide grinding belt, which comprises two components, namely a first component and a second component, wherein the two components are mixed in equal proportion, and the two components comprise:
the component A comprises the following components in parts by weight:
modified phenolic resin: 40 parts, defoaming agent: 0.5 part, dispersant: 0.2 part of organic montmorillonite: 1 part, buffer: 0.3 part, preservative: 0.2 part;
the defoaming agent is an organic silicon defoaming agent; the dispersant is sodium polyacrylate; the buffer is sodium bicarbonate; the preservative is a Rohm Hass LXE bactericide;
the component B comprises the following components in parts by weight:
organic silicon modified epoxy resin: 20 parts of polypropylene fiber: 1 part, coupling agent: 1 part, accelerator: 2 parts, defoaming agent: 0.3 part, thixotropic agent: 1 part, filler: 5 parts, flame retardant: 0.5 part, composite rare earth: 0.01 part;
the coupling agent is a silane coupling agent; the promoter is phenol; the thixotropic agent is hydrophobic fumed silica with the surface treated by organic matters; the filler is calcium carbonate; the flame retardant is phosphoric triester.
In this embodiment, the composite rare earth includes the following components in percentage by weight: y: 13%, Sc: 16%, Gd: 9%, Sm: 18%, Pr: 9 percent of La, and the balance of La, wherein the sum of the components is 100 percent.
In this embodiment, the silicone-modified epoxy resin includes the following components in percentage by mass: epoxy resin: 45%, deionized water: 15%, dibutyltin dilaurate: 10%, methyltriethoxysilane: 20 percent, and the sum of the above components is 100 percent.
In this example, the polypropylene fibers are short fibers of 3mm length.
In this example, the modified phenolic resin in component A was prepared as follows:
(1) treating paper-making black liquor with a membrane, removing part of alkali and sugar, precipitating with sulfuric acid, press-filtering with a plate frame to obtain solid lignin, drying at 50 deg.C for 20 hr, and ball-milling and sieving with 120 mesh sieve;
(2) uniformly mixing the solid lignin, the phenol and the sodium hydroxide aqueous solution in the step (1), heating to 80 ℃, cooling to 50 ℃ after reaction, continuously adding the water and the sodium hydroxide aqueous solution, stirring for 10min, adding the formaldehyde, slowly heating to 80 ℃, carrying out heat preservation reaction for 30min, cooling to 70 ℃, continuously adding the sodium hydroxide aqueous solution, the formaldehyde and the graphite, heating to 90 ℃, carrying out heat preservation reaction for 40min, and carrying out reduced pressure dehydration to obtain the modified phenolic resin.
The preparation method of the adhesive comprises the following steps:
(1) sending the modified phenolic resin and the organic montmorillonite into a dispersion cylinder, uniformly stirring for 10 minutes, then adding a defoaming agent, a dispersing agent and a buffering agent, starting a stirrer, slowly stirring at the stirring speed of 200 revolutions per minute, stirring for 10 minutes, then adding a preservative, continuously stirring for 20 minutes at the stirring speed of 250 revolutions per minute, and discharging for later use;
(2) mixing and stirring the organic silicon modified epoxy resin and the filler uniformly, stirring for 20min, adding the coupling agent and the polypropylene fiber, continuing to stir for 40min, adding the accelerator, the defoamer, the thixotropic agent, the flame retardant and the composite rare earth, continuing to mix and stir uniformly, and discharging;
(3) the adhesive is prepared by uniformly stirring and mixing the component A and the component B at the stirring speed of 100 revolutions per minute for 20 minutes.
The adhesive for the ultra-wide grinding belt prepared by the embodiment has the tensile shear strength of 10.9MPa, the colloid tensile strength of 24MPa, the elongation of 130% and the tensile elastic modulus of 270 MPa.
Example 2
The embodiment provides an adhesive for ultra-wide grinding belt, which comprises two components, namely a first component and a second component, wherein the two components are mixed in equal proportion, and the two components comprise:
the component A comprises the following components in parts by weight:
modified phenolic resin: 60 parts, defoaming agent: 1.0 part, dispersant: 0.5 part of organic montmorillonite: 3 parts, buffer: 0.5 part, preservative: 0.3 part;
the defoaming agent is an organic silicon defoaming agent; the dispersant is sodium polyacrylate; the buffering agent is sodium acetate; the preservative is a Rohm Hass LXE bactericide;
the component B comprises the following components in parts by weight:
organic silicon modified epoxy resin: 30 parts, polypropylene fiber: 3 parts, coupling agent: 2 parts, accelerator: 5 parts, defoaming agent: 0.5 part, thixotropic agent: 2 parts of filler: 7 parts, flame retardant: 0.8 part, composite rare earth: 0.03 part;
the coupling agent is a silane coupling agent; the promoter is phenol; the thixotropic agent is hydrophobic fumed silica with the surface treated by organic matters; the filler is a silicate; the flame retardant is phosphoric triester.
In this embodiment, the composite rare earth includes the following components in percentage by weight: y: 15%, Sc: 18%, Gd: 11%, Sm: 20%, Pr: 11 percent of La, and the balance of La, wherein the sum of the components is 100 percent.
In this embodiment, the silicone-modified epoxy resin includes the following components in percentage by mass: epoxy resin: 50%, deionized water: 20%, dibutyltin dilaurate: 12%, methyltriethoxysilane: 24 percent, and the sum of the above components is 100 percent.
In this example, the polypropylene fibers are short fibers having a length of 5 mm.
In this example, the modified phenolic resin in component A was prepared as follows:
(1) treating paper-making black liquor with a membrane, removing partial alkali and sugar, precipitating with sulfuric acid, press-filtering with a plate frame to obtain solid lignin, drying at 55 deg.C for 22 hr, and ball-milling and sieving with 120 mesh sieve;
(2) uniformly mixing the solid lignin, the phenol and the sodium hydroxide aqueous solution in the step (1), heating to 90 ℃, cooling to 60 ℃ after reaction, continuously adding the water and the sodium hydroxide aqueous solution, stirring for 12min, adding the formaldehyde, slowly heating to 90 ℃, carrying out heat preservation reaction for 40min, cooling to 75 ℃, continuously adding the sodium hydroxide aqueous solution, the formaldehyde and the graphite, heating to 95 ℃, carrying out heat preservation reaction for 45min, and carrying out reduced pressure dehydration to obtain the modified phenolic resin.
The preparation method of the adhesive comprises the following steps:
(1) sending the modified phenolic resin and the organic montmorillonite into a dispersion cylinder, uniformly stirring for 30 minutes, then adding a defoaming agent, a dispersing agent and a buffering agent, starting a stirrer, slowly stirring at the stirring speed of 230 revolutions per minute, stirring for 13 minutes, then adding a preservative, continuously stirring for 30 minutes at the stirring speed of 300 revolutions per minute, and discharging for later use;
(2) mixing and stirring the organic silicon modified epoxy resin and the filler uniformly, stirring for 40min, adding the coupling agent and the polypropylene fiber, continuing to stir for 50min, adding the accelerator, the defoamer, the thixotropic agent, the flame retardant and the composite rare earth, continuing to mix and stir uniformly, and discharging;
(3) the adhesive is prepared by uniformly stirring and mixing the component A and the component B at the stirring speed of 200 revolutions per minute for 230 minutes.
The adhesive for the ultra-wide grinding belt prepared by the embodiment has the tensile shear strength of 12.3MPa, the colloid tensile strength of 27.5MPa, the elongation of 155% and the tensile elastic modulus of 320 MPa.
Example 3
The embodiment provides an adhesive for ultra-wide grinding belt, which comprises two components, namely a first component and a second component, wherein the two components are mixed in equal proportion, and the two components comprise:
the component A comprises the following components in parts by weight:
modified phenolic resin: 50 parts, defoaming agent: 0.8 part, dispersant: 0.3 part of organic montmorillonite: 2 parts, buffer: 0.4 part, preservative: 0.25 part;
the defoaming agent is an organic silicon defoaming agent; the dispersant is sodium polyacrylate; the buffer is sodium bicarbonate; the preservative is a Rohm Hass LXE bactericide;
the component B comprises the following components in parts by weight:
organic silicon modified epoxy resin: 25 parts, polypropylene fiber: 2 parts, coupling agent: 2 parts, accelerator: 3 parts of defoaming agent: 0.4 part, thixotropic agent: 1 part, filler: 6 parts of flame retardant: 0.7 part of composite rare earth: 0.02 part;
the coupling agent is a silane coupling agent; the promoter is phenol; the thixotropic agent is hydrophobic fumed silica with the surface treated by organic matters; the filler is sodium hexafluoroaluminate; the flame retardant is phosphoric triester.
In this embodiment, the composite rare earth includes the following components in percentage by weight: y: 14%, Sc: 17%, Gd: 10%, Sm: 19%, Pr: 10 percent, the balance being La, the sum of the above components being 100 percent.
In this embodiment, the silicone-modified epoxy resin includes the following components in percentage by mass: epoxy resin: 48%, deionized water: 18%, dibutyltin dilaurate: 11%, methyltriethoxysilane: 22 percent, and the sum of the above components is 100 percent.
In this example, the polypropylene fibers are short fibers of 4mm length.
In this example, the modified phenolic resin in component A was prepared as follows:
(1) treating paper-making black liquor with a membrane, removing partial alkali and sugar, precipitating with sulfuric acid, press-filtering with a plate frame to obtain solid lignin, drying at 52 deg.C for 21 hr, and ball-milling and sieving with 120 mesh sieve;
(2) uniformly mixing the solid lignin, the phenol and the sodium hydroxide aqueous solution in the step (1), heating to 85 ℃, cooling to 55 ℃ after reaction, continuously adding the water and the sodium hydroxide aqueous solution, stirring for 11min, adding the formaldehyde, slowly heating to 85 ℃, carrying out heat preservation reaction for 35min, cooling to 72 ℃, continuously adding the sodium hydroxide aqueous solution, the formaldehyde and the graphite, heating to 92 ℃, carrying out heat preservation reaction for 43min, and carrying out reduced pressure dehydration to obtain the modified phenolic resin.
The preparation method of the adhesive comprises the following steps:
(1) sending the modified phenolic resin and the organic montmorillonite into a dispersion cylinder, uniformly stirring for 20 minutes, then adding a defoaming agent, a dispersing agent and a buffering agent, starting a stirrer, slowly stirring at the stirring speed of 220 revolutions per minute, stirring for 12 minutes, then adding a preservative, continuously stirring for 25 minutes at the stirring speed of 280 revolutions per minute, and discharging for later use;
(2) mixing and stirring the organic silicon modified epoxy resin and the filler uniformly, stirring for 30min, adding the coupling agent and the polypropylene fiber, continuing to stir for 45min, adding the accelerator, the defoamer, the thixotropic agent, the flame retardant and the composite rare earth, continuing to mix and stir uniformly, and discharging;
(3) the adhesive is prepared by uniformly stirring and mixing the component A and the component B at the stirring speed of 150 revolutions per minute for 25 minutes.
The adhesive for the ultra-wide grinding belt prepared by the embodiment has the tensile shear strength of 9.6MPa, the colloid tensile strength of 20.5MPa, the elongation of 120% and the tensile elastic modulus of 278 MPa.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (6)
1. The adhesive for the ultra-wide grinding belt is characterized by comprising a first component and a second component which are mixed in equal proportion, wherein:
the component A comprises the following components in parts by weight:
modified phenolic resin: 40-60 parts of defoaming agent: 0.5-1.0 part of dispersant: 0.2-0.5 part of organic montmorillonite: 1-3 parts, buffer: 0.3-0.5 part, preservative: 0.2-0.3 part;
the defoaming agent is an organic silicon defoaming agent; the dispersant is sodium polyacrylate; the buffer is sodium bicarbonate or sodium acetate; the preservative is a Rohm and Hass LXE bactericide;
the component B comprises the following components in parts by weight:
organic silicon modified epoxy resin: 20-30 parts of polypropylene fiber: 1-3 parts of coupling agent: 1-2 parts, accelerator: 2-5 parts of defoaming agent: 0.3-0.5 part of thixotropic agent: 1-2 parts of filler: 5-7 parts of a flame retardant: 0.5-0.8 parts of composite rare earth: 0.01-0.03 part;
the coupling agent is a silane coupling agent; the promoter is phenol; the thixotropic agent is hydrophobic fumed silica with the surface treated by organic matters; the filler is at least one of calcium carbonate, silicate, sodium hexafluoroaluminate, potassium fluoborate, sodium fluoborate, calcium fluoride, sodium fluoride, calcium stearate or zinc stearate; the flame retardant is phosphoric triester.
2. The ultra-wide abrasive tape adhesive of claim 1, wherein: the composite rare earth comprises the following components in percentage by weight: y: 13-15%, Sc: 16-18%, Gd: 9-11%, Sm: 18-20%, Pr: 9-11 percent of La and the balance of 100 percent of the total weight of the components.
3. The ultra-wide abrasive tape adhesive of claim 1, wherein: the organic silicon modified epoxy resin comprises the following components in percentage by mass: epoxy resin: 45-50%, deionized water: 15-20%, dibutyltin dilaurate: 10-12%, methyltriethoxysilane: 20-24%, and the sum of the above components is 100%.
4. The ultra-wide abrasive tape adhesive of claim 1, wherein: the polypropylene fiber is short fiber with the length of 3-5 mm.
5. The ultra-wide abrasive tape adhesive of claim 1, wherein: the modified phenolic resin in the component A is prepared by the following method:
(1) treating paper-making black liquor with membrane, removing part of alkali and sugar, precipitating with sulfuric acid, press-filtering with plate frame to obtain solid lignin, drying at 50-55 deg.C for 20-22 hr, ball-milling, and sieving with 120 mesh sieve;
(2) uniformly mixing the solid lignin, the phenol and the sodium hydroxide aqueous solution in the step (1), heating to 80-90 ℃, cooling to 50-60 ℃ after reaction, continuously adding water and the sodium hydroxide aqueous solution, stirring for 10-12min, adding formaldehyde, slowly heating to 80-90 ℃, carrying out heat preservation reaction for 30-40min, cooling to 70-75 ℃, continuously adding the sodium hydroxide aqueous solution, the formaldehyde and the graphite, heating to 90-95 ℃, carrying out heat preservation reaction for 40-45min, and carrying out reduced pressure dehydration to obtain the modified phenolic resin.
6. The ultra-wide abrasive tape adhesive of claim 1, wherein: the preparation method of the adhesive comprises the following steps:
(1) sending the modified phenolic resin and the organic montmorillonite into a dispersion cylinder, uniformly stirring for 10-30 minutes, then adding a defoaming agent, a dispersing agent and a buffering agent, starting a stirrer, slowly stirring at the stirring speed of 200-;
(2) mixing and stirring the organic silicon modified epoxy resin and the filler uniformly, stirring for 20-40min, adding the coupling agent and the polypropylene fiber, continuing to stir for 40-50min, adding the accelerator, the defoamer, the thixotropic agent, the flame retardant and the composite rare earth, continuing to mix and stir uniformly, and discharging;
(3) the component A and the component B are stirred and mixed evenly at the stirring speed of 100-.
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| CN202011012210.4A CN112175557A (en) | 2020-09-24 | 2020-09-24 | Adhesive for ultra-wide grinding belt |
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| CN202011012210.4A CN112175557A (en) | 2020-09-24 | 2020-09-24 | Adhesive for ultra-wide grinding belt |
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