CN105524241B - EO grades of wood-based plates preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent and preparation method thereof - Google Patents
EO grades of wood-based plates preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent and preparation method thereof Download PDFInfo
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- CN105524241B CN105524241B CN201610061548.6A CN201610061548A CN105524241B CN 105524241 B CN105524241 B CN 105524241B CN 201610061548 A CN201610061548 A CN 201610061548A CN 105524241 B CN105524241 B CN 105524241B
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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
- C08G12/26—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
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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
- C09J161/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic and acyclic or carbocyclic compounds
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a kind of EO grades of wood-based plate preparation methods of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, include the following steps：1. formaldehyde is put into reaction kettle；2. stirring, alkali is added to be adjusted to alkalescent；3. first batch urea and melamine are mixed in input reaction kettle；4. 85 90 DEG C of second lot urea are warming up in 60 80min adds in reaction kettle, and acid adding is adjusted；5. carry out polycondensation；6. alkali is added in reaction kettle, cooling stops polycondensation；7. third batch urea is added in reaction kettle, and keep the temperature；8. the 4th batch urea is added in into reaction kettle；9. being cooled to 40 DEG C or so, adjustment pH value is alkalescent, is discharged.Compared with the existing, the adhesive environmental protection that the present invention prepares, it is pollution-free for household industry.
Description
Technical field
The invention belongs to adhesive field, the system of more particularly to a kind of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of EO grades of wood-based plate
Preparation Method and preparation method thereof.
Background technology
With the promotion that people's living standard and Environmental security are realized, especially in California, USA CARB bills, Europe
After REACH regulations all propose the burst size of methanal of woodwork harsh requirement, manufacture trade barrier are formd, are influenced
The outlet of China's woodwork.
Standing grain perfume (or spice) plate substitutes traditional urea-formaldehyde resin adhesive using MDI glue, this is the basic reason of its not release formaldehyde.MDI glue
Name isocyanates, is a kind of very safe and stable compound.It can be used for making inner container of icebox material and Lycra fiber etc.
With human body closely related material, the man-made organ of the implantation human body such as manufacture artificial blood vessel, heart valve can also be used to.Therefore
It is very safe adhesive.Although not containing formaldehyde in isocyanates, cure incomplete isocyanate-monomer to people
The harm of body is also very big.From the point of view of cost, the cost that MDI adhesives stick agent than modified environment protection type urea formaldehyde resin adhesive is about high by ten
Times, this is also that maximum obstacle is promoted in enterprise.
And Central China part of the manufacturer produces ecological board using soybean-based protein adhesive, although not containing formaldehyde, there are glue for product
Connect low intensity, poor water resistance, easily it is mouldy the defects of, this seriously constrains the usage of product.
Invention content
An object of the present invention, which is that, provides a kind of preparation of the low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of EO grades of wood-based plate
Method, the adhesive environmental protection that the present invention prepares is pollution-free for household industry.
Technical solution is：The preparation method of the low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of a kind of EO grades of wood-based plate, including following step
Suddenly：
1. formaldehyde is put into reaction kettle；
2. stirring, alkali is added to be adjusted to alkalescent；
3. first batch urea and melamine are mixed in input reaction kettle；
4. being warming up to 85-90 DEG C in 60-110min, second lot urea is then added in into reaction kettle, and acid adding is adjusted；
5. carry out polycondensation；
6. alkali is added in reaction kettle, cooling stops polycondensation；
7. third batch urea is added in reaction kettle, and keep the temperature；
8. the 4th batch urea is added in into reaction kettle；
9. being cooled to 40 DEG C or so, adjustment pH value is alkalescent, is discharged.
Preferably, the formaldehyde addition is 24.55-37.00 parts by weight, the melamine addition is 2.43-
The sum of 4.00 parts by weight, each batch urea addition are that the total addition of urea is 22.89-39.5 parts by weight.
Preferably, the polycondensation time is 70-90min.
Preferably, the step 7. in, the soaking time be 15~30 minutes.
Preferably, 2. middle pH is 7.8-8.8 to the step, 4. middle pH is 5.0-6.5 to step, and 6. middle pH is 6.8- to step
8.0,8. middle pH is 6.8-7.7 to step, and 9. middle pH is 7.5-8.5 to step.
Compared with prior art, the beneficial effects of the present invention are：
The second object of the present invention is to provide a kind of EO grades of wood-based plate with low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent.
Technical solution is：
A kind of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of EO grades of wood-based plate, which adopts prepares with the aforedescribed process.
The present invention is directed to demand of the social development for environmental protection, while takes into account the performance for considering adhesive, purposes model
It encloses and the factor of production cost, processing is modified to traditional urea-formaldehyde resin adhesive, obtain performance and be produced into
This relatively preferable super EO grades of low aldehyde environment protection modification urea-formaldehyde resin adhesive.The 4.75mm sanded boards produced using this adhesive,
In March, 2015 by " national wood-based plate and Bamboo and wood product Quality Supervision and Inspection Center " detection, is examined according to GB/T11718-2009
Project reaches standard gauge provisioning request, wherein burst size of methanal 2.4mg/100g, well below E1 grades standard 8mg/100g.Meet
Health of people ecological requirements ensure safety nuisance free on the source of family product.Reach industry advanced level, be conducive to break through
Export trade barrier.
The present invention carries out 1 feed intake formaldehyde and melamine, 4 dispensing urea, increases the Lauxite in preparation process
The intermediates content of glue, these intermediates can improve timber intensity.
The present invention reduces intermediate detection step, operation is more convenient by controlling the reaction time.
Description of the drawings
Fig. 1 is flow chart schematic diagram of the present invention.
Specific embodiment
Below in conjunction with attached drawing 1, the invention will be further described.
As shown in Figure 1, a kind of preparation method of EO grades of wood-based plate with low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, including following step
Suddenly：
1. formaldehyde is put into reaction kettle.
2. stirring, alkali is added to be adjusted to alkalescent.
3. first urea (is accounted for into the 8~13% of urea total amount of feeding.) and melamine mixing input reaction kettle in.
4. 85-90 DEG C is warming up in 60-110min, then by second batch urea (account for urea total amount of feeding 23~
33%.) reaction kettle is added in, and acid adding is adjusted.
5. polycondensation is carried out, until terminal viscosity reaches 15~30 seconds.
6. alkali is added in reaction kettle, cooling stops polycondensation.
7. third batch urea (is accounted for into the 27~37% of urea total amount of feeding.) reaction kettle is added in, and keep the temperature 15~30 minutes.
8. the 4th batch of urea (is accounted for into the 25~32% of urea total amount of feeding.) add in reaction kettle.
9. being cooled to 40 DEG C or so, adjustment pH value is alkalescent, is discharged.
Embodiment 1
1. 37.0kg formaldehyde is put into reaction kettle.
2. stirring, alkali is added to adjust pH to 8.0-8.5.
3. the 10% of urea total amount and 4kg melamines are mixed in input reaction kettle.
4. being warming up to 85-88 DEG C in 60-80min, reaction kettle then is added in by the 28% of urea total amount, adds acid for adjusting pH
To 5.0-5.5.
5. polycondensation 60min.
6. plus adjusting PH with base is cooled to 70-75 DEG C to 6.8-7.2.
7. adding in reaction kettle by the 32% of urea total amount, and keep the temperature 20 minutes.
8. plus then adjusting PH with base adds in reaction kettle to 6.8-7.2 by the 30% of urea total amount.
9. being cooled to 40 DEG C, pH to 8.0-8.5, discharging are adjusted.
In the present embodiment, the total addition of urea is 39.5kg.
Embodiment 2
1. 40.6kg formaldehyde is put into reaction kettle.
2. stirring, alkali is added to adjust pH to 8.6-8.8.
3. the 12% of urea total amount and 4.0kg melamines are mixed in input reaction kettle.
4. being warming up to 85-88 DEG C in 60-80min, reaction kettle then is added in by the 32% of urea total amount, adds acid for adjusting pH
To 6.0-6.5.
5. polycondensation 45min.
6. plus adjusting PH with base is cooled to 70-75 DEG C to 7.8-8.0.
7. adding in reaction kettle by the 29% of urea total amount, and keep the temperature 15 minutes.
8. plus then adjusting PH with base adds in reaction kettle to 7.0-7.4 by the 27% of urea total amount.
9. being cooled to 40 DEG C, pH to 7.5-8.0, discharging are adjusted.
In the present embodiment, the total addition of urea is 40.0kg.
Embodiment 3
1. 24.55kg formaldehyde is put into reaction kettle.
2. stirring, alkali is added to adjust pH to 7.8-8.4.
3. the 8% of urea total amount and 2.43kg melamines are mixed in input reaction kettle.
4. being warming up to 85-88 DEG C in 60-80min, reaction kettle then is added in by the 24% of urea total amount, adds acid for adjusting pH
To 6.5-6.8.
5. polycondensation 80min.
6. plus adjusting PH with base is cooled to 70-75 DEG C to 7.8-8.0.
7. adding in reaction kettle by the 37% of urea total amount, and keep the temperature 15 minutes.
8. plus then adjusting PH with base adds in reaction kettle to 7.4-7.7 by the 31% of urea total amount.
9. being cooled to 40 DEG C, pH to 7.8-8.2, discharging are adjusted.
In the present embodiment, the total addition of urea is 22.89kg.
The embodiment 1-3 adhesives prepared are detected, testing result see the table below one.
Table one
In table one, viscosity is tested according to following methods：The adhesive of certain temperature is filled up into -4 glasss of painting, until glue overflows
Come；During filling, it is necessary to block the aperture calibrated.Extra glue is blown off with lid, then opens aperture.In lid
When removing, glue can flow down and be used together manual time-keeping.When liquid stream stops, stopwatch is pressed.
The adhesive that embodiment 1-3 is prepared is suppressed for plank, and results of property is shown in Table two.
Table two
As can be seen from Table II, Testing index reaches and is far superior to GB/T 11718-2009 national Specifications.It is made
Plank due to exist extremely micro free formaldehyde, have Anti-moth-eating or fungi-proofing effect, performance be better than formaldehydeless wood-based plate.
The adhesive that the present invention prepares is produced into fiberboard and delivers national wood-based plate and Bamboo and wood product quality surveillance inspection
Test Spot detection, burst size of methanal 2.4mg/100g.
Claims (7)
1. a kind of EO grades of wood-based plate preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, includes the following steps：
1. formaldehyde is put into reaction kettle；
2. stirring, alkali is added to be adjusted to alkalescent；
3. first batch urea and melamine are mixed in input reaction kettle；
4. being warming up to 85-90 DEG C in 60-110min, second lot urea is then added in into reaction kettle, and acid adding is adjusted；
5. carry out polycondensation；
6. alkali is added in reaction kettle, cooling stops polycondensation；
7. third batch urea is added in reaction kettle, and keep the temperature；
8. the 4th batch urea is added in into reaction kettle；
9. being cooled to 40 DEG C or so, adjustment pH values are alkalescent, are discharged.
2. the EO grades of wood-based plate according to claim 1 preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, feature exist
In：The formaldehyde addition be 24.55-37 parts by weight, the melamine addition be 2.43-4 parts by weight, each batch urea
The sum of addition is that the total addition of urea is 22.89-39.5 parts by weight.
3. the EO grades of wood-based plate according to claim 2 preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, feature exist
In：The first batch urea：Second lot urea：Third batch urea：4th batch urea is 8~13：23~33：27~
37：25~32.
4. the preparation of the low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of EO grade wood-based plates according to claim 1-3 any claims
Method, it is characterised in that：The polycondensation time is 70-90min.
5. the EO grades of wood-based plate according to claim 4 preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, feature exist
In：The step 7. in, the soaking time be 15~30 minutes.
6. the EO grades of wood-based plate according to claim 5 preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent, feature exist
In：2. middle pH is 7.8-8.8 to the step, and 4. middle pH is 5.0-6.5 to step, and 6. middle pH is 6.8-8.0, step 8. middle pH to step
For 6.8-7.7,9. middle pH is 7.5-8.5 to step.
7. a kind of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent of EO grades of wood-based plate, it is characterised in that：The adhesive uses claim 1-6
It is prepared by the method described in any claim.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610061548.6A CN105524241B (en) | 2016-01-28 | 2016-01-28 | EO grades of wood-based plates preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent and preparation method thereof |
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|---|---|---|---|
| CN201610061548.6A CN105524241B (en) | 2016-01-28 | 2016-01-28 | EO grades of wood-based plates preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent and preparation method thereof |
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| CN105524241A CN105524241A (en) | 2016-04-27 |
| CN105524241B true CN105524241B (en) | 2018-06-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106398611B (en) * | 2016-09-30 | 2019-12-24 | 云南玉加宝人造板有限公司 | Formula and preparation method of environment-friendly adhesive for floor base material |
| CN107033309A (en) * | 2017-03-28 | 2017-08-11 | 曾华 | A kind of preparation method of fiberboard adhesive |
| CN107325243B (en) * | 2017-08-16 | 2020-01-07 | 常熟理工学院 | Preparation method of environment-friendly urea-formaldehyde resin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104449503A (en) * | 2014-12-03 | 2015-03-25 | 绿洲森工股份有限公司 | Low-formaldehyde wood adhesive and preparation method thereof |
| 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 |
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- 2016-01-28 CN CN201610061548.6A patent/CN105524241B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104449503A (en) * | 2014-12-03 | 2015-03-25 | 绿洲森工股份有限公司 | Low-formaldehyde wood adhesive and preparation method thereof |
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