CN107151298A - Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof - Google Patents
Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof Download PDFInfo
- Publication number
- CN107151298A CN107151298A CN201710322944.4A CN201710322944A CN107151298A CN 107151298 A CN107151298 A CN 107151298A CN 201710322944 A CN201710322944 A CN 201710322944A CN 107151298 A CN107151298 A CN 107151298A
- Authority
- CN
- China
- Prior art keywords
- urea
- formaldehyde
- glue
- solution
- minutes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
- C08G12/36—Ureas; Thioureas
- C08G12/38—Ureas; Thioureas and melamines
-
- 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
- C08G12/40—Chemically modified polycondensates
-
- 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
- C09J161/32—Modified amine-aldehyde condensates
Abstract
The invention discloses a kind of applewood E0 grades of medium density fibre board (MDF) modified urea-formaldehyde glues, it is made up of formaldehyde, urea, polyvinyl alcohol, melamine, triethanolamine, formic acid, sodium hydroxide, technique is using the multiple polycondensating process of the sour soda acid formula of alkali.The modified urea-formaldehyde glue of the present invention is by improving urea-formaldehyde glue synthesis technique, adjust mol ratio, reaction time, using the multiple polycondensation of low temperature process, increase the tack and felt properties of glue, the process such as adapted homemade formaldehyde elimination agent when using, modified urea-formaldehyde glue is fully meet the requirement of production E0 grade fibre boards, reduce nuisance, improve product quality and benefit.
Description
Technical field
The invention belongs to chemical industry wood-based plate synthetic adhesive manufacturing technology field, and in particular to close in a kind of applewood E0 grades
Spend modified urea-formaldehyde glue of fiberboard and preparation method thereof.
Technical background
With society progress and expanding economy people material and spiritual life level improve constantly, living conditions and
Consumption idea is also increasingly changing, and increasing people has no longer met the present situation in oneself room, and is directed to living environment
Decorative reformation, especially new purchase house, is even more deliberately meticulous fitting-up, in the hope of the graceful, attractive in appearance, comfortable of living environment.It is right
For the modern of most of us, the time for averagely having 60%~80% in one day is spent indoors, and environmental medicine is ground
Study carefully and show, the disease and indoor environment factor of the mankind 4% is closely related, the quality of indoor environmental condition, particularly indoor environment
Air Quality can directly influence our physical and mental health.In general, the chemical contamination that interior decoration is caused can be held
Continuous 3-15.When to indoor fit up, due to often containing a variety of harmful changes in finishing various types of materials used
Material is learned, they can be constant and are slowly dispersed into air.For example using Lauxite as the people of one of main component
Making plate can slow release formaldehyde gas.In such new home, people often occur that headache, dizziness, anaphylaxis are tired first
The sense of discomfort such as labor and eye, nose, larynx shouting pain.Although this will not horse back threat to life, can greatly endanger people body be good for
Health.Investigation finds that the harmful chemical substance that common are produced by interior decoration has nearly 20 kinds, wherein quantity at most, to people
Body harm most serious has four kinds of formaldehyde, benzene and benzene homologues, radon and ammonia；Wherein formaldehyde harm is the most universal.
As people are to environmental protection and the attention of health problem, the pollution of wood-based plate nuisance causes the great attention of people,
Many improvement have been carried out to adhesive of artificial board.But it is existing because applewood physical aspect and chemical composition are different from other timber
There are adhesive and the adhesive of production technology production to meet production requirement, it is proposed that a kind of new adhesive formulation and production
Method.
The content of the invention
For above-mentioned problems of the prior art and defect, it is an object of the invention to provide a kind of applewood E0 grades
The modified urea-formaldehyde glue of medium density fibre board (MDF), the urea-formaldehyde glue adjusts reaction time, reaction temperature by improving urea-formaldehyde glue synthesis technique,
The multiple polycondensation of low temperature process, coordinates the processes such as homemade formaldehyde elimination agent when using, modified urea-formaldehyde glue fullys meet production
The requirement of E0 grade fibre boards, reduces harm of the burst size of methanal to environment and human body, demand, it is ensured that product quality, improves
Economic benefit.
Realize that the technical scheme that foregoing invention purpose is used is a kind of modified urea of applewood E0 grades of medium density fibre board (MDF)s
Aldehyde glue, the glue that the mol ratio being made up of the material of following ratio of weight and number is 0.84：537 parts of concentration for 37% formaldehyde, 472
Part urea, 1.28 parts of polyvinyl alcohol, 23 parts of melamines, 0.4 part of triethanolamine are as surface modifier, 0.2 part of concentration
20% formic acid, 0.4 part of sodium hydroxide composition.
It is a still further object of the present invention to provide the method for the modified urea-formaldehyde glue of above-mentioned applewood E0 grades of medium density fibre board (MDF)s,
Specifically include the following steps：
1) it is standby that formaldehyde, urea, melamine, surface modifications agent, formic acid solution, sodium hydroxide are weighed in proportion；
2) formalin is put into reactor, opens stirring, added in advance with the polyethylene that 6 hours are soaked in 60 DEG C of water
Alcohol, regulation HP values add first time urea and first time melamine form molten to 8.5~8.7 when being warming up to 30 DEG C~35 DEG C
Liquid A, first urea accounts for the 41.2% of total urea amount；First melamine accounts for the 1.57% of glue total amount；
3) solution A was slowly increased in 30~40 minutes at 85 DEG C, insulation reaction 30 minutes has been incubated HP and has been not less than
6.7,80 DEG C are cooled to afterwards, HP is adjusted with formic acid solution in two times, HP5.6~8 are adjusted for the first time, and second of tune HP5.3~5.4 is each
Insulation 10 minutes, reacts 20~25 minutes at a temperature of 83 DEG C~85 DEG C, obtains solution B；
4) when HP values reach 5.2~5.4, start to survey cloud point, occurred at 20~25 minutes or so vaporific in 25 DEG C of water, obtain
To solution C；
5) added immediately in solution C and second of urea progress second is added after triethanolamine, adjustment HP to 6.2~6.4
Secondary polycondensation reaction, is warming up to 82 DEG C, reacts 20 minutes, when viscosity reaches that 16~16.5/25 DEG C obtain solution D；Second batch urea
Account for the 10% of total urea amount；
6) addition third time urea and second of melamine progress third time polycondensation reaction in solution D, HP6.1~
6.2, temperature is reacted 30~35 minutes at 85 DEG C, and when terminal viscosity reaches 20~21 seconds/25 DEG C, sodium hydroxide solution is used immediately
HP is adjusted to 7.8~8.0 terminating reactions, solution E is obtained, the 3rd batch of urea accounts for the 7.68% of total urea amount, second batch melamine
Amine accounts for the 0.67% of glue total amount；
7) E solution is cooled, while surveying HP is not less than 7.5,20 minutes is incubated at 55 DEG C, when afterwards with 10 minutes
Between be slowly added to the 4th urea, adjustment four urea of HP7.5~7.8, the account for the 41% of total urea, and 38 DEG C are cooled to after adding
Degree, HP7.8~8.0 are adjusted with sodium hydroxide solution, shut down sampling, you can obtain this adhesive.
The modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s of the present invention takes following several method to make to produce sizing material
Apple wood products reach Form aldehyde release limitation pair in E0 grades of GB18580-2001 indoor decorating and refurnishing materials wood-based plates and its product
The standard requirement of burst size of methanal.
(1) by improving the mol ratio of the synthesizing formula technique of urea-formaldehyde glue, adjustment formaldehyde and urea, when Reasonable adjustment reacts
Between, the HP values of reaction temperature and reaction medium.Technique uses alkali-acid-multiple polycondensating process of Acid-Base formula, the free aldehyde of reduction resin.
(2) glue is modified in the micro melamine of addition of suitable time and polyvinyl alcohol, to increase glue
Tack and wet strength, be easy to improve applewood fiber interweaving performance, it is ensured that sheet material internal bond strength and water-resistance are up to standard, carry
High plate face smoothness and reduction free formaldehyde content；Triethanolamine is added as surfactant and both plays modulator effect, again
Dispersant effect is played, size is evenly between making xanthan molecule.Formula is reasonable, compatible between burst size of methanal and handing-over intensity
Contradiction.
(3) activation energy is reduced using low temperature process, is conducive to methylolated completion, it is ensured that the adhesive strength of resin.
(4) used using a kind of homemade supporting above applewood modified urea-formaldehyde glue of formaldehyde elimination agent, production is reduced by a relatively large margin
The burst size of methanal of product, the formaldehyde elimination agent can absorb most of free formaldehyde during glue curing, be a kind of monomethylolurea
With the mixtures of other absorption formaldehyde materials, can be with failing to react complete free formaldehyde fast under HTHP, acid condition
Speed reaction, generates the material of another stabilization, and participates in resin crosslinks acceleration solidification.
Embodiment
The specific embodiment that is provided below by way of inventor and test example further illustrate beneficial effects of the present invention.
Embodiment 1 makes formaldehyde elimination agent formula and its production method by oneself
1. being put into the process water of formaldehyde elimination agent total amount 28%, stirring is opened, the formaldehyde of the content 37% of total amount 22% is put into.
2. the first sodium hypochlorite of total amount 4.3% is added, it is micro- to be warming up to 30-35 DEG C and be completely dissolved it.
3. adding the triethanolamine of total amount 0.04%, HP is maintained at the borax of 8.0. totalling amounts 0.04% successively, total amount
0.23% hexamethylenetetramine is kept for 10 minutes, is completely dissolved it.
4. adding the second sodium hypochlorite of total amount 1.2%, kept for 5 minutes, temperature is maintained at 30-35 DEG C, add total amount
0.05% content adjusts HP to 8.8. for 30% sodium hydroxide solution
5. adding the first time urea of total amount 25%, kept for 10 minutes, add the ammonia that the content of total amount 1.2% is 20%
Water.
6. second of urea of total amount 20% is added, it is micro- to be warming up to 30 DEG C and dissolve it, keep shutting down for 10 minutes, you can
To the formaldehyde elimination agent of fully transparent color.
The formaldehyde elimination agent can absorb most of free formaldehyde during glue curing, be that a kind of methylolurea absorbs with other
The mixture of formaldehyde material, can rapidly react with failing to react complete free formaldehyde under HTHP, acid condition, generate
Another material of stabilization, and resin crosslinks acceleration solidification is participated in, need to adjust addition according to different situations in use.
The conventional formulation general technology way of embodiment 2：
1) it is made up of following ratio of weight and number, mol ratio of 0.84 material：537 parts of content for 37% formaldehyde, 483
Part urea, not Polyvinyl alcohol (pvA), be not added with melamine (m), be not added with triethanolamine (TEA) sodium hydroxide, 0.2 part
Formic acid (concentration is 20%), 0.4~0.5 (concentration is 30%) part sodium hydroxide be used as HP conditioning agents composition.
2) technique is using conventional alkali soda acid formula, and urea is added in two times：Temperature control is added for the first time at 90-93 DEG C
30 minutes are incubated after urea, formic acid solution is added in three times afterwards and adjusts HP to 4.5-4.6 reactions to be hydrogenated with sodium hydroxide solution to terminal
Terminating reaction, the later stage adds second of urea to cool to 38 DEG C of shutdown, and sampling is designated as A samples.
The non-Polyvinyl alcohol (pvA) of embodiment 3, plus triethanolamine (TEA), 11 parts of melamine (M) is added, it is conventional
Way, urea is added in three times, preparation method：
1) by following ratio of weight and number, mol ratio is made up of 0.84 material：537 parts of weight/mass percentage composition is 37%
Formaldehyde, 477 parts of urea, the melamine (once add) for adding 11 parts, 0.2 part of formic acid (concentration is 20%), 0.4~
The sodium hydroxide of 0.6 (concentration is 30%) part is constituted as HP conditioning agents.
2) technique is using conventional alkali soda acid formula, and non-Polyvinyl alcohol does not add triethanolamine, and urea is added in three times.System
Method：Formaldehyde after metering is adjusted into HP to 8.6,93-95 DEG C, insulation are warming up to after adding first urea and melamine mixing
After 30 minutes, add after second of urea and be incubated 30 minutes, add formic acid solution in three times afterwards and adjust the reactions of HP to 5.6 30-40
Minute, during viscosity 20-21 second, sodium hydroxide solution is hydrogenated with immediately and adjusts HP7.8-8.0 terminating reactions, the later stage adds third time urea drop
Temperature, when cooling to 38 DEG C, shuts down sampling and is designated as B.First time urea accounts for the 37.5% of total urea, and first time urea accounts for total urea
11.3%, first time urea accounts for the 51.15% of total urea.
The non-Polyvinyl alcohol (pvA) of embodiment 4, plus triethanolamine (TEA), add 23 parts of melamine (M), urea
Add in four times, preparation method：
1) by following ratio of weight and number, mol ratio is made up of 0.84 material：537 parts of weight/mass percentage composition is 37%
Formaldehyde, 472 parts of urea, the melamine (twice add) for adding 23 parts, 0.2 part of formic acid (concentration is 20%), 0.4~
The sodium hydroxide of 0.6 (concentration is 30%) part is constituted as HP conditioning agents.
2) technique uses the preparation method of E0 grades of medium density fibre board (MDF) modified urea-formaldehyde glues of applewood, difference：(see applewood
E0 grades of glue preparation methods) in solution C with sodium hydroxide solution substitute triethanolamine regulation HP, adjustment HP to 6.2~6.4 after
Add second of urea and carry out second of polycondensation reaction, system of the later stage other ways with E0 grades of medium density fibre board (MDF) modified urea-formaldehyde glues
Preparation Method, shuts down sampling and is designated as C.
A kind of method of the modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s of the invention of embodiment 5
1st, a kind of modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s, is made up of the material of following ratio of weight and number
Mol ratio is 0.84 glue：Formaldehyde, 472 part urea, 1.28 part polyvinyl alcohol, 23 part melamines of 537 parts of concentration for 37%
Formic acid, the 0.4 part of sodium hydroxide composition of amine, 0.4 part of triethanolamine as surface modifier, 0.2 part of concentration for 20%.
2nd, the method for preparing the modified urea-formaldehyde glue of above-mentioned applewood E0 grades of medium density fibre board (MDF)s, specifically includes the following steps：
1) formalin is put into reactor, opens stirring, added in advance with the polyethylene that 6 hours are soaked in 60 DEG C of water
Alcohol, regulation HP values add first time urea and first time melamine formation solution A, first urine to 8.5 when being warming up to 30 DEG C
Element accounts for the 41.2% of total urea amount；First melamine accounts for the 1.57% of glue total amount；
2) solution A was slowly increased in 30~40 minutes at 85 DEG C, insulation reaction 30 minutes has been incubated HP and has been not less than
6.7,80 DEG C are cooled to afterwards, HP is adjusted with formic acid solution in two times, and HP5.6, second of tune HP5.3 respectively 10 points of insulation are adjusted for the first time
Clock, reacts 20 minutes at a temperature of 83 DEG C, obtains solution B；
3) when HP values reach 5.2, start to survey cloud point, occurred at 20 minutes or so vaporific in 25 DEG C of water, obtain solution C；
4) added immediately in solution C and second of urea second of polycondensation of progress is added after triethanolamine, adjustment HP to 6.2
Reaction, is warming up to 82 DEG C, reacts 20 minutes, when viscosity reaches that 16~16.5/25 DEG C obtain solution D；Second batch urea accounts for total urine
The 10% of element amount；
5) third time urea is added in solution D and second of melamine carries out third time polycondensation reaction, HP6.1, temperature
Degree 85 DEG C react 30 minutes, when terminal viscosity reaches 20~21 seconds/25 DEG C, immediately with sodium hydroxide solution adjust HP to
7.8 terminating reactions, obtain solution E, and the 3rd batch of urea accounts for the 7.68% of total urea amount, and second batch melamine accounts for glue total amount
0.67%；
6) E solution is cooled, while surveying HP is not less than 7.5,20 minutes is incubated at 55 DEG C, when afterwards with 10 minutes
Between be slowly added to the 4th urea, adjust HP7.5, the 4th time urea accounts for the 41% of total urea, and 38 DEG C of degree are cooled to after adding, use
Sodium hydroxide solution adjusts HP7.8, shuts down sampling, you can obtain this adhesive.
A kind of method of the modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s of the invention of embodiment 6
1st, a kind of modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s, is made up of the material of following ratio of weight and number
Mol ratio is 0.84 glue：Formaldehyde, 472 part urea, 1.28 part polyvinyl alcohol, 23 part melamines of 537 parts of concentration for 37%
Formic acid, the 0.4 part of sodium hydroxide composition of amine, 0.4 part of triethanolamine as surface modifier, 0.2 part of concentration for 20%.
2nd, the method for preparing the modified urea-formaldehyde glue of above-mentioned applewood E0 grades of medium density fibre board (MDF)s, specifically includes the following steps：
1) formalin is put into reactor, opens stirring, added in advance with the polyethylene that 6 hours are soaked in 60 DEG C of water
Alcohol, regulation HP values add first time urea and first time melamine formation solution A, first urine to 8.7 when being warming up to 35 DEG C
Element accounts for the 41.2% of total urea amount；First melamine accounts for the 1.57% of glue total amount；
2) solution A was slowly increased in 40 minutes at 85 DEG C, insulation reaction 30 minutes has been incubated HP and has been not less than 6.7, it
After cool to 80 DEG C, adjust HP with formic acid solution in two times, HP8 adjusted for the first time, second adjusts HP5.4 respectively insulation 10 minutes, 85
Reacted 25 minutes at a temperature of DEG C, obtain solution B；
4) when HP values reach 5.4, start to survey cloud point, occurred at 25 minutes or so vaporific in 25 DEG C of water, obtain solution C；
5) added immediately in solution C and second of urea second of polycondensation of progress is added after triethanolamine, adjustment HP to 6.4
Reaction, is warming up to 82 DEG C, reacts 20 minutes, when viscosity reaches that 16~16.5/25 DEG C obtain solution D；Second batch urea accounts for total urine
The 10% of element amount；
6) third time urea is added in solution D and second of melamine carries out third time polycondensation reaction, HP6.2, temperature
Degree 85 DEG C react 35 minutes, when terminal viscosity reaches 20~21 seconds/25 DEG C, immediately with sodium hydroxide solution adjust HP to
8.0 terminating reactions, obtain solution E, and the 3rd batch of urea accounts for the 7.68% of total urea amount, and second batch melamine accounts for glue total amount
0.67%；
7) E solution is cooled, while surveying HP is not less than 7.5,20 minutes is incubated at 55 DEG C, when afterwards with 10 minutes
Between be slowly added to the 4th urea, adjust HP7.8, the 4th time urea accounts for the 41% of total urea, and 38 DEG C of degree are cooled to after adding, use
Sodium hydroxide solution adjusts HP8.0, shuts down sampling, you can obtain this adhesive.
The using effect of test example 1 is tested
The practical performance of the main checking glue of this experiment, glue mol ratio is with the case of 0.84, when emphasis is to solidification
Between and free formaldehyde do in the height of contrast test, wherein hardening time and free formaldehyde, the quality of final influence product, following table
Add after the different amounts of formaldehyde elimination agent of example 1, the hardening time of glue and free formaldehyde and storage stability change as follows：
Add influence of the different amounts of formaldehyde elimination agent to various glue quality index
Experiment is proved：Various glue mol ratios add the formaldehyde elimination agent of embodiment 1 of different proportion with the case of 0.84
Afterwards, the free formaldehyde in glue is significantly declined, more than 40% free formaldehyde can be reduced, make formaldehyde molecule isomery
Change to substantially reduce its harmfulness, have positive effect to reduction free formaldehyde content, while after excessive formaldehyde elimination agent is added,
Hardening time is obviously prolonged, and is unfavorable for improving production efficiency.
The contrast test of test example 2
Using the specification wood chip of applewood, the example 2 modulated, example 3, example 4, reality are added at defibrator process shotcrete pipe respectively
The glue of the different ways of 5 four kinds of example, adds the formaldehyde elimination agent of embodiment 1 of different proportion, 3 millimeters is produced in continuous press line
Calendar plate carries out effect experiment.
When using various glue, coordinate the glue of 180kg/ cubes of addition, add 5kg/ cubes of paraffin, curing agent
4kg/ cubes of 20% ammonium chloride solution, while formaldehyde elimination agent addition 5%, 10%, 15% contrasting of being separately added into resin added
Experiment.Through drying, after mating formation, 6kg/ cubes of releasing agent is added in hot pressing, hot compression parameterses and fiber moisture keep one
Cause.The every physical and chemical index of Product checking after glue performance and compacting is as follows：
Add the change of different amounts of formaldehyde elimination agent and sheet material physical and chemical index
Contrast test conclusion：
1st, add after the formaldehyde elimination agent of example 1 of different proportion, the applewood fibrous plate physicochemical property for making various glue
See list above, with the increase of formaldehyde elimination agent addition, burst size of methanal significantly declines, it is possible to decrease more than 30~40%
Burst size of methanal, makes formaldehyde molecule isomerization so as to substantially reduce its harmfulness, the glue of example 5 is examined after adding 10% formaldehyde elimination agent
Survey, standard value is fully achieved once in burst size of methanal.
2nd, when formaldehyde elimination agent adds the 10% of glue amount, the internal bond strength of sheet material, thickness swelling rate and MOR
Etc. index best results, the glue of example 5 has a positive effect, but with the increase of additional proportion, interior combination is strong, degree modulus of elasticity,
Surface bonding strength, MOR decline, and thickness swelling rate becomes big.
3rd, add micro melamine and polyvinyl alcohol is modified to glue, add the tack of glue and wet strong
Degree, be easy to improve applewood fiber interweaving performance, it is ensured that internal bond strength and water-resistance are up to standard, improve plate face smoothness and
Reduce free formaldehyde content；Triethanolamine is added as surfactant and both plays modulator effect, dispersant effect is played again,
Evenly, the glue of example 5 adds 10% formaldehyde elimination agent compatibility burst size of methanal with joining intensity etc. to size between making xanthan molecule
Contradiction between index.
4th, the glue of example 5 is taken, the formula production technology of 10% formaldehyde elimination agent is added, application method is entered as described above
Row production, improves product quality and benefit, is fully able to reach the requirement that applewood produces E0 grade fibre boards, meets fiberboard
First in GB/T117182009, GB/T17657-2013 and GB18580-2001 indoor decorating and refurnishing materials wood-based plate and its product
The standard requirement of the sheet material physicochemical properties such as aldehyde release limitation PARA FORMALDEHYDE PRILLS(91,95) burst size.
Claims (2)
1. a kind of modified urea-formaldehyde glue of applewood E0 grades of medium density fibre board (MDF)s, it is characterised in that by the thing of following ratio of weight and number
The mol ratio that matter is made is 0.84 glue：Formaldehyde for 37% of 537 parts of concentration, 472 parts of urea, 1.28 parts of polyvinyl alcohol, 23
Formic acid as surface modifier, 0.2 part of concentration for 20% of part melamine, 0.4 part of triethanolamine, 0.4 part of sodium hydroxide group
Into.
2. prepare the method for the modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood described in claim 1, it is characterised in that tool
Body comprises the following steps：
1) it is standby that formaldehyde, urea, melamine, surface modifications agent, formic acid solution, sodium hydroxide are weighed in proportion；
2) formalin is put into reactor, opens stirring, added in advance with the polyvinyl alcohol that 6 hours are soaked in 60 DEG C of water, rise
Temperature adds first time urea and first time melamine formation solution A to HP values are adjusted at 30 DEG C~35 DEG C to 8.5~8.7, the
A collection of urea accounts for the 41.2% of total urea amount；First melamine accounts for the 1.57% of glue total amount；
3) solution A was slowly increased in 30~40 minutes at 85 DEG C, insulation reaction 30 minutes has been incubated HP and has been not less than 6.7, it
After cool to 80 DEG C, adjust HP with formic acid solution in two times, HP5.6~8 adjusted for the first time, second adjusts HP5.3~5.4 respectively insulation 10
Minute, reacted 20~25 minutes at a temperature of 83 DEG C~85 DEG C, obtain solution B；
4) when HP values reach 5.2~5.4, start to survey cloud point, occurred at 20~25 minutes or so vaporific in 25 DEG C of water, obtain molten
Liquid C；
5) added immediately in solution C and second of urea progress, second of contracting is added after triethanolamine, adjustment HP to 6.2~6.4
Poly- reaction, is warming up to 82 DEG C, reacts 20 minutes, when viscosity reaches that 16~16.5/25 DEG C obtain solution D；Second batch urea is accounted for always
The 10% of urea amount；
6) third time urea is added in solution D and second of melamine carries out third time polycondensation reaction, HP6.1~6.2, temperature
Degree reacts 30~35 minutes at 85 DEG C, when terminal viscosity reaches 20~21 seconds/25 DEG C, adjusts HP with sodium hydroxide solution immediately
To 7.8~8.0 terminating reactions, solution E is obtained, the 3rd batch of urea accounts for the 7.68% of total urea amount, and second batch melamine accounts for glue
The 0.67% of water inventory；
7) E solution is cooled, while surveying HP is not less than 7.5,20 minutes is incubated at 55 DEG C, it is slow with 10 minutes afterwards
Slowly the 4th urea is added, adjustment four urea of HP7.5~7.8, the account for the 41% of total urea, 38 DEG C of degree are cooled to after adding,
HP7.8~8.0 are adjusted with sodium hydroxide solution, sampling are shut down, you can obtain this adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322944.4A CN107151298A (en) | 2017-05-09 | 2017-05-09 | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322944.4A CN107151298A (en) | 2017-05-09 | 2017-05-09 | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107151298A true CN107151298A (en) | 2017-09-12 |
Family
ID=59792672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710322944.4A Pending CN107151298A (en) | 2017-05-09 | 2017-05-09 | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107151298A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744670A (en) * | 2019-10-18 | 2020-02-04 | 大亚人造板集团有限公司 | E0Method for manufacturing density fiberboard for stage electronic circuit backing plate |
| CN111139006A (en) * | 2020-01-09 | 2020-05-12 | 浙江帝龙新材料有限公司 | Urea-formaldehyde resin adhesive and preparation method and application thereof |
| CN111944466A (en) * | 2020-08-24 | 2020-11-17 | 香河天亚木业有限公司 | Urea-formaldehyde glue for producing shaving board and preparation method thereof |
| CN111978901A (en) * | 2020-08-31 | 2020-11-24 | 四川华象林产工业有限公司 | Melamine modified urea-formaldehyde resin for adhering solid wood floor and preparation method thereof |
| CN113146786A (en) * | 2021-03-25 | 2021-07-23 | 广西贺州恒达板业股份有限公司 | Preparation method of anti-corrosion finger-jointed board wood |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009080798A1 (en) * | 2007-12-21 | 2009-07-02 | Dynea Oy | A process for the continuous production of high efficient aqueous amino formaldehyde resin solutions |
| CN101550323A (en) * | 2009-04-28 | 2009-10-07 | 南京工业大学 | Preparation method of low-cost UMF resin adhesive used for E0-level plywood |
| CN101979455A (en) * | 2010-10-15 | 2011-02-23 | 蔡正文 | Urea-formaldehyde glue and preparation method thereof |
| CN102604574A (en) * | 2012-02-20 | 2012-07-25 | 张国华 | Adhesive |
| CN102634310A (en) * | 2012-04-21 | 2012-08-15 | 安徽肯帝亚皖华人造板有限公司 | Preparation method of urea formaldehyde resin adhesive |
| CN102766424A (en) * | 2012-08-06 | 2012-11-07 | 广东始兴县华洲木业有限公司 | Preparation method of environment-friendly moistureproof glue |
| CN103484045A (en) * | 2013-09-26 | 2014-01-01 | 广西三威林产工业有限公司 | Adhesive with ultralow formaldehyde release amount, and preparation method of same |
| CN103788909A (en) * | 2013-12-16 | 2014-05-14 | 广西华峰林业集团股份有限公司 | Preparation method of adhesive for E0 environment-friendly shaving board |
| CN104513641A (en) * | 2013-12-15 | 2015-04-15 | 广西鹿寨通用人造板有限公司 | Preparation method of low formaldehyde emission adhesive |
-
2017
- 2017-05-09 CN CN201710322944.4A patent/CN107151298A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009080798A1 (en) * | 2007-12-21 | 2009-07-02 | Dynea Oy | A process for the continuous production of high efficient aqueous amino formaldehyde resin solutions |
| CN101550323A (en) * | 2009-04-28 | 2009-10-07 | 南京工业大学 | Preparation method of low-cost UMF resin adhesive used for E0-level plywood |
| CN101979455A (en) * | 2010-10-15 | 2011-02-23 | 蔡正文 | Urea-formaldehyde glue and preparation method thereof |
| CN102604574A (en) * | 2012-02-20 | 2012-07-25 | 张国华 | Adhesive |
| CN102634310A (en) * | 2012-04-21 | 2012-08-15 | 安徽肯帝亚皖华人造板有限公司 | Preparation method of urea formaldehyde resin adhesive |
| CN102766424A (en) * | 2012-08-06 | 2012-11-07 | 广东始兴县华洲木业有限公司 | Preparation method of environment-friendly moistureproof glue |
| CN103484045A (en) * | 2013-09-26 | 2014-01-01 | 广西三威林产工业有限公司 | Adhesive with ultralow formaldehyde release amount, and preparation method of same |
| CN104513641A (en) * | 2013-12-15 | 2015-04-15 | 广西鹿寨通用人造板有限公司 | Preparation method of low formaldehyde emission adhesive |
| CN103788909A (en) * | 2013-12-16 | 2014-05-14 | 广西华峰林业集团股份有限公司 | Preparation method of adhesive for E0 environment-friendly shaving board |
Non-Patent Citations (4)
| Title |
|---|
| 代少俊等: "《涂料与黏合剂》", 31 August 2014, 江苏大学出版社 * |
| 朱天乐: "《微环境空气质量控制》", 31 May 2006, 北京航空航天大学出版社 * |
| 段新芳: "《中国林业循环经济发展研究》", 31 October 2016, 中国建材工业出版社 * |
| 陈顺和: "《家居装修专家支招》", 30 September 2008, 福建科学技术出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744670A (en) * | 2019-10-18 | 2020-02-04 | 大亚人造板集团有限公司 | E0Method for manufacturing density fiberboard for stage electronic circuit backing plate |
| CN110744670B (en) * | 2019-10-18 | 2022-04-19 | 大亚人造板集团有限公司 | Method for manufacturing density fiberboard for E0-grade electronic circuit backing board |
| CN111139006A (en) * | 2020-01-09 | 2020-05-12 | 浙江帝龙新材料有限公司 | Urea-formaldehyde resin adhesive and preparation method and application thereof |
| CN111944466A (en) * | 2020-08-24 | 2020-11-17 | 香河天亚木业有限公司 | Urea-formaldehyde glue for producing shaving board and preparation method thereof |
| CN111978901A (en) * | 2020-08-31 | 2020-11-24 | 四川华象林产工业有限公司 | Melamine modified urea-formaldehyde resin for adhering solid wood floor and preparation method thereof |
| CN113146786A (en) * | 2021-03-25 | 2021-07-23 | 广西贺州恒达板业股份有限公司 | Preparation method of anti-corrosion finger-jointed board wood |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107151298A (en) | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof | |
| CN105345911B (en) | Fire-retardant stalk-shaving board and its manufacture method | |
| CN100588520C (en) | Environment-friendly type middle and higher density Fibreboard Production technology | |
| CN105599419B (en) | Net aldehyde antibacterial melamine impregnated paper method for composite material | |
| CN101624436B (en) | Environment-protective urea-formaldehyde resin with novel structure as well as preparation method and application thereof | |
| CN100384899C (en) | Urea resin and production thereof | |
| CN101791817A (en) | Production method of environmental-friendly type low-cost middle and high density fiber board | |
| CN111805678B (en) | Preparation method of flame-retardant shaving board | |
| CN101200624A (en) | Lumber adhesive agent additives and preparation technique | |
| CN1884332B (en) | Urea-formaldehyde resin and its preparation method | |
| CN103740324B (en) | A kind of adhesion agent for artificial board and its preparation method and application | |
| CN102604021A (en) | Method for synthesizing urea-formaldehyde resin containing micro free formaldehyde for E0-level artificial boards | |
| CN108372570A (en) | A kind of preparation method of the moisture-proof wheat straw board of fire resisting | |
| CN109370512A (en) | A kind of glued board walnut cake protein adhesive and preparation method thereof | |
| CN104830258A (en) | Modified urea-formaldehyde resin adhesive used for high-dampness-proof fiber board | |
| CN101298159B (en) | Processing technique of medium density fiber plate suitable for routing board | |
| CN103484045A (en) | Adhesive with ultralow formaldehyde release amount, and preparation method of same | |
| CN110272707A (en) | Milling fiberboard is engraved in a kind of isocyanates gluing agent combination material and its manufacture | |
| CN105345913B (en) | High water resistance muf resin used for shaving board and production technology and application | |
| CN109111875A (en) | A kind of Lauxite drop aldehyde curing accelerator and the preparation method and application thereof, a kind of wood-based plate | |
| CN105273150B (en) | A kind of preparation method of ecological board base material Lauxite | |
| CN100404574C (en) | Low formaldehyde release volume urea formaldehyde resin preparation method | |
| CN101245172B (en) | Urea formaldehyde condensate additive agent, production method and urea formaldehyde condensate adhesive agent | |
| CN105666632B (en) | A kind of manufacture method of antitheft door door-plate environment friendly corrosion protection medium density fibre board (MDF) | |
| CN100447216C (en) | Flame-proof non-formaldehyde wood adhesive and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170912 |
|
| RJ01 | Rejection of invention patent application after publication |