CN107129781A - A kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine and preparation method thereof - Google Patents
A kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine and preparation method thereof Download PDFInfo
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- CN107129781A CN107129781A CN201710513012.8A CN201710513012A CN107129781A CN 107129781 A CN107129781 A CN 107129781A CN 201710513012 A CN201710513012 A CN 201710513012A CN 107129781 A CN107129781 A CN 107129781A
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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
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C09J161/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
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- 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
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
- C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
- C08G12/12—Ureas; Thioureas
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- 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
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Abstract
The present invention provides a kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine and preparation method thereof, and the urea-formaldehyde resin adhesive includes microcapsules, deinsectization plant pulp and the Lauxite of cladding cork tree juice, and specific preparation method is：The emulsified solvent high speed that the aqueous solution of Lauxite is added into the juice containing cork tree stirs into emulsion, and acid as curing agent is added dropwise, and heating is adjusted to neutrality, obtains coating the microcapsules of cork tree juice；Gleditsia sinensis and Mao Xiang are cleaned and shredded, is added in ethanol solution and mashes into pasty mass, through cellulase degradation, be condensed into deinsectization plant pulp；Formaldehyde is all added in reaction flask, using weak-alkaline and weak-acidic weak base, urea is added in three batches, urea and deinsectization plant pulp are added in second batch, the microcapsules of urea and cladding cork tree juice are added at the 3rd batch, cooling discharge obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine.Chinese herbal medicine material is combined and assigns Lauxite antiseptic insect-repelling performance by slow release method by the present invention with microcapsules technology.
Description
Technical field
The invention belongs to urea-formaldehyde resin adhesive field of material technology, and in particular to a kind of microcapsules urea based on Chinese herbal medicine
Urea formaldehyde adhesive and preparation method thereof.
Background technology
Packaging material is always using timber source material as primary raw material, but the timber supply and demand contradiction of China is very big, and timber
Easily corroded, gone mouldy, the biological corruption such as rotten and insect pest shows, therefore usually requires to prevent timber source material by entomogenous fungi
Rotten, mothproof and termite-proof performance, improves timber source service life and use value, but the timber after insect-prevention treatment is added
The defect of timber, increases the glued difficulty of timber, and the performance of adhesive also influences whether the performance of packaging material.
Urea-formaldehyde resin adhesive is one of packaging material adhesive, mainly using urea and formic acid as synthesis material,
Alkalescent by the addition stage under conditions of acidulous catalyst and after being condensed the reaction in stage with generating a kind of linear low molecule
The resin prepolymer at initial stage of amount, then add chlorination by the curing agent such as, sulfuric acid pound and whisk it is well mixed after be used for wood-based plate
Gluing, accelerates resin crosslinks solidification under conditions of high temperature hot pressing, forms the end of insoluble insoluble three-dimensional space network shape crosslinking
Phase resin structure, tenant's leading position in adhesive of artificial board, the consumption of packaging material adhesive.
The phenolic resin adhesive of a kind of utilization waste preservative timber synthesis disclosed in Chinese patent CN 101597469B and
Its preparation method, anticorrosion is handled the preserving timber and phenol of forming agent processing as raw material, in sulfuric acid catalyst and inhibition
Preserving timber liquefier is formed in the presence of agent, then preserving timber liquefier is subjected to polymerization in formaldehyde and forms anti-corrosion phenolic resin
Adhesive, the party determines antiseptic property.Anti-corrosion phenolic resin adhesive prepared by method had both solved the problems, such as the recycling of preserving timber,
It can assign phenolic resin certain antiseptic property again.A kind of wood preservation gluing disclosed in Chinese patent CN 103740306B
The preparation method of agent, adds tung oil and epoxy resin, reaction is obtained after phenolic resin adhesive is adjusted into pH value through sodium hydroxide
The thick liquid of adhesive, adds MIBK and is well mixed, solvent flashing obtains wood preservation adhesive, and this method utilizes epoxy resin
Imparting adhesive antiseptic property is mutually crosslinked with phenolic resin.There is above-mentioned prior art to understand, existing anti-corrosion adhesive is all profit
It is combined with macromolecular antiseptic material with phenolic resin, Chinese herbal medicine material is combined by sustained release by the present invention with microcapsules technology
Technology assigns Lauxite antiseptic insect-repelling performance.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine and its
Preparation method, the urea-formaldehyde resin adhesive includes microcapsules, deinsectization plant pulp and the Lauxite of cork tree juice, by plant extracts
It is added in the form of liquid and solid-state in Lauxite, makes the Lauxite of preparation that there is the performance of excellent pest-resistant antibacterial,
Improve the scope of application of the Lauxite in packaging field.
In order to solve the above technical problems, the technical scheme is that：
A kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, it is characterised in that micro- glue based on Chinese herbal medicine
Capsule urea-formaldehyde resin adhesive includes microcapsules, deinsectization plant pulp and the Lauxite of cladding cork tree juice, micro- glue of the cork tree juice
The wall material of capsule is Lauxite, and the raw material of the deinsectization plant pulp is gleditsia sinensis and Mao Xiang.
As the preferred of above-mentioned technical proposal, urea divides in the preparation process of weak base-weak acid-weak base of the Lauxite
Three batches of additions.
The present invention also provides a kind of preparation method of the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, and its feature exists
In：Comprise the following steps：
(1) aqueous solution of Lauxite is added in the emulsified solvent of the juice containing cork tree, high-speed stirred is formed surely at room temperature
Fixed emulsion, reduces mixing speed, and acid as curing agent is added dropwise, and temperature reaction, regulation pH value to neutrality is washed drying, coated
The microcapsules of cork tree juice；
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, add fiber
Plain enzyme enzymolysis, is condensed into deinsectization plant pulp；
(3) formaldehyde is all added in reaction flask, pH value is adjusted to weak base state with sodium hydroxide solution, added
First urea, after temperature reaction, with first acid for adjusting pH value to weak acidic condition, adds second batch urea and is prepared by step (2)
Deinsectization plant pulp, continues to react, and is finally adjusted pH value to weak base state with sodium hydroxide solution, adds the 3rd batch of urea and step
Suddenly after the microcapsules for coating cork tree juice that prepared by (1), insulation reaction, it is cooled to after room temperature and discharges, obtain based on the micro- of Chinese herbal medicine
Capsule urea-formaldehyde resin adhesive.
As the preferred of above-mentioned technical proposal, in the step (1), solvent is diformazan in the emulsified solvent of the juice containing cork tree
Benzene, emulsifying agent is ethyl parathion, phoxim, and the content of cork tree juice is 8-10%.
As the preferred of above-mentioned technical proposal, in the step (1), acid as curing agent is oxalic acid.
As the preferred of above-mentioned technical proposal, in the step (1), the mass ratio of cork tree juice and Lauxite is 0.1-
0.3:1。
As the preferred of above-mentioned technical proposal, in the step (2), the amount ratio of pasty mass and cellulase is 1g:
20-25FPU。
As the preferred of above-mentioned technical proposal, in the step (2), the temperature of enzymolysis is 5-10 DEG C, and the time is 6-10h.
As the preferred of above-mentioned technical proposal, in the step (3), the consumption that urea is added in three batches is 50%：30%：
20%.
As the preferred of above-mentioned technical proposal, in the step (3), the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine
The content of the microcapsules of middle cork tree juice is 2-5%, and the content of deinsectization plant pulp is 10-15%.
Compared with prior art, the invention has the advantages that：
(1) Lauxite in the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine for preparing of the present invention using weak base-
The method that weak acid-weak base and urea are added in three batches is prepared from, and on the basis of Lauxite bond properties is ensured, makes preparation
Free formaldehyde in urea-formaldehyde resin and phenol quantity it is minimum, make the feature of environmental protection and better mechanical property of the Lauxite of preparation.
(2) micro- glue containing cladding cork tree juice in the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine prepared by the present invention
Capsule, the wall material of microcapsules is Lauxite, and core is cork tree juice, the microcapsules and Lauxite prepared by wall material of Lauxite
Material has excellent affine performance, can be evenly distributed in Lauxite, be made slowly by ambient pressure in Lauxite
Cork tree juice is discharged, the effect of long-term insect prevention is reached, in addition, also containing in the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine
Deinsectization plant pulp, the primary raw material of deinsectization plant prize is staple cellulose and pest-resistant anti-corrosion active ingredient, and staple cellulose can be filled
Network of fibers is formed in Lauxite, the water resistance and mechanical performance of Lauxite is improved, pest-resistant anti-corrosion active ingredient can
To assign Lauxite insect prevention anti-corrosion property energy.
(3) containing the pest control and anticorrosion composition that has immediate effect in the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine prepared by the present invention
With sustained release pest control and anticorrosion composition, and with antiseptic insect-repelling cellulose fibre network, therefore the urea formaldehyde resin adhesive prepared
Mechanical performance, pest control and anticorrosion anti-microbial property are good, on the basis of gluing use requirement is met, can improve the anti-corrosion of packaging material
Pest-resistant performance.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiment, herein illustrative examples and explanation of the invention
For explaining the present invention, but it is not as a limitation of the invention.
Embodiment 1：
(1) it is 0.1 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 8%
Cork tree juice emulsified solvent in, wherein, in the emulsified solvent of the juice containing cork tree solvent be dimethylbenzene, emulsifying agent be ethyl to sulphur
Phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2000r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 80 DEG C of reaction 1h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:20FPU, adds cellulase, 6h is digested at 5 DEG C, deinsectization plant pulp is condensed into.
(3) it is 1.5 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 2% in agent, and the content of deinsectization plant pulp is 10%.
Embodiment 2：
(1) it is 0.3 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 10%
Cork tree juice emulsified solvent in, wherein, in the emulsified solvent of the juice containing cork tree solvent be dimethylbenzene, emulsifying agent be ethyl to sulphur
Phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2500r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 90 DEG C of reaction 2h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:25FPU, adds cellulase, digests 10h at 10 DEG C, be condensed into deinsectization plant
Slurry；
(3) it is 1.8 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 5% in agent, and the content of deinsectization plant pulp is 15%.
Embodiment 3：
(1) it is 0.2 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 8-
In the emulsified solvent of 10% cork tree juice, wherein, solvent is dimethylbenzene in the emulsified solvent of the juice containing cork tree, and emulsifying agent is ethyl pair
Sulphur phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2200r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 85 DEG C of reaction 1.5h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:23FPU, adds cellulase, digests 8h at 8 DEG C, be condensed into deinsectization plant pulp；
(3) it is 1.6 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 3% in agent, and the content of deinsectization plant pulp is 13%.
Embodiment 4：
(1) it is 0.3 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 8-
In the emulsified solvent of 10% cork tree juice, wherein, solvent is dimethylbenzene in the emulsified solvent of the juice containing cork tree, and emulsifying agent is ethyl pair
Sulphur phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2000r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 90 DEG C of reaction 1h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:20FPU, adds cellulase, digests 6h at 10 DEG C, be condensed into deinsectization plant
Slurry；
(3) it is 1.7 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 3% in agent, and the content of deinsectization plant pulp is 11%.
Embodiment 5：
(1) it is 0.2 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 8%
Cork tree juice emulsified solvent in, wherein, in the emulsified solvent of the juice containing cork tree solvent be dimethylbenzene, emulsifying agent be ethyl to sulphur
Phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2200r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 80 DEG C of reaction 2h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:23FPU, adds cellulase, digests 9h at 7 DEG C, be condensed into deinsectization plant pulp；
(3) it is 1.7 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 4% in agent, and the content of deinsectization plant pulp is 14%.
Embodiment 6：
(1) it is 0.3 according to the mass ratio of cork tree juice and Lauxite:1, the aqueous solution of Lauxite is added to containing 9%
Cork tree juice emulsified solvent in, wherein, in the emulsified solvent of the juice containing cork tree solvent be dimethylbenzene, emulsifying agent be ethyl to sulphur
Phosphorus, phoxim, form stable emulsion, reduction mixing speed to 500r/ with 2500r/min rotating speed high-speed stirred at room temperature
Min, is added dropwise oxalic acid curing agent, is warming up to 85 DEG C of reaction 2h, and regulation pH value to neutrality washs drying, obtains coating cork tree juice
Microcapsules.
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, according to pasty state
The amount ratio of material and cellulase is 1g:24FPU, adds cellulase, digests 8h at 8 DEG C, be condensed into deinsectization plant pulp；
(3) it is 1.7 according to the amount ratio of formaldehyde and the material of urea, formaldehyde is all added in reaction flask, hydrogen-oxygen is used
Change sodium solution to adjust pH value to weak base state, add first 50% urea, after temperature reaction, with first acid for adjusting pH value extremely
Weak acidic condition, adds the urea and deinsectization plant pulp of second batch 30%, continues to react, is finally adjusted pH value with sodium hydroxide solution
Section is added after the urea of the 3rd batch 20% and the microcapsules of cladding cork tree juice, insulation reaction, is cooled to after room temperature to weak base state
Discharging, obtains the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, wherein, the microcapsules Lauxite gluing based on Chinese herbal medicine
The content of the microcapsules of cork tree juice is 4% in agent, and the content of deinsectization plant pulp is 14%.
After testing, the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine that prepared by embodiment 1-6 and prior art
The mechanical strength of wood preservation Lauxite, the result of antiseptic property are as follows：
As seen from the above table, the bonding strength of the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine prepared by the present invention is with showing
Some wood preservation Lauxites are similar, but anti-microbial property, instantaneous insect prevention performance and permanent insect prevention performance are all significantly improved, tool
There is good antiseptic insect-repelling anti-microbial property.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.
Any person skilled in the art can all be carried out under the spirit and scope without prejudice to the present invention to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed spirit with
All equivalent modifications completed under technological thought or change, should be covered by the claim of the present invention.
Claims (10)
1. a kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, it is characterised in that the microcapsules based on Chinese herbal medicine
Urea-formaldehyde resin adhesive includes microcapsules, deinsectization plant pulp and the Lauxite of cladding cork tree juice, the microcapsules of the cork tree juice
Wall material be Lauxite, the raw material of the deinsectization plant pulp is gleditsia sinensis and Mao Xiang.
2. a kind of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 1, it is characterised in that described
Urea is added in three batches in the preparation process of weak base-weak acid-weak base of Lauxite.
3. a kind of preparation method of the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine, it is characterised in that：Comprise the following steps：
(1) aqueous solution of Lauxite is added in the emulsified solvent of the juice containing cork tree, high-speed stirred forms stabilization at room temperature
Emulsion, reduces mixing speed, and acid as curing agent is added dropwise, and temperature reaction, regulation pH value to neutrality washs drying, obtains coating cork tree
The microcapsules of juice；
(2) by after gleditsia sinensis and Mao Xiang wash cleans, shred, be added in ethanol solution, mash into pasty mass, add cellulase
Enzymolysis, is condensed into deinsectization plant pulp；
(3) formaldehyde is all added in reaction flask, pH value is adjusted to weak base state with sodium hydroxide solution, first is added
Urea is criticized, after temperature reaction, with first acid for adjusting pH value to weak acidic condition, deinsectization prepared by second batch urea and step (2) is added
Plant pulp, continues to react, and is finally adjusted pH value to weak base state with sodium hydroxide solution, adds the 3rd batch of urea and step
(1) after the microcapsules of the cladding cork tree juice prepared, insulation reaction, it is cooled to after room temperature and discharges, obtain micro- glue based on Chinese herbal medicine
Capsule urea-formaldehyde resin adhesive.
4. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (1), solvent is dimethylbenzene in the emulsified solvent of the juice containing cork tree, and emulsifying agent is ethyl parathion, pungent sulphur
Phosphorus, the content of cork tree juice is 8-10%.
5. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (1), acid as curing agent is oxalic acid.
6. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (1), the mass ratio of cork tree juice and Lauxite is 0.1-0.3:1.
7. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (2), the amount ratio of pasty mass and cellulase is 1g:20-25FPU.
8. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (2), the temperature of enzymolysis is 5-10 DEG C, and the time is 6-10h.
9. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (3), the consumption that urea is added in three batches is 50%：30%：20%.
10. a kind of preparation method of microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine according to claim 3, it is special
Levy and be：In the step (3), the content of the microcapsules of cork tree juice is in the microcapsules urea-formaldehyde resin adhesive based on Chinese herbal medicine
2-5%, the content of deinsectization plant pulp is 10-15%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762043A (en) * | 2015-03-30 | 2015-07-08 | 广西宾阳县荣良新材料科技有限公司 | Production method of low-formaldehyde mildewproof urea-formaldehyde resin adhesive |
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Application publication date: 20170905 |