CN109762495A - A kind of ureaformaldehyde viscose binder and preparation method thereof - Google Patents
A kind of ureaformaldehyde viscose binder and preparation method thereof Download PDFInfo
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- CN109762495A CN109762495A CN201711095822.2A CN201711095822A CN109762495A CN 109762495 A CN109762495 A CN 109762495A CN 201711095822 A CN201711095822 A CN 201711095822A CN 109762495 A CN109762495 A CN 109762495A
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Abstract
The present invention relates to urea-formaldehyde glue technical field of adhesive, especially a kind of additive and preparation method thereof for the ureaformaldehyde viscose binder for being related to wood-based plate.By weight, consisting of: 400~500 parts of 36% formaldehyde, 200~300 parts of urea, 25~30 parts of melamine, 0.5~0.9 part of polyvinyl alcohol, mass fraction is 2~4 parts of ammonium hydroxide of 26%, 0.6~0.8 part of dodecyl sodium sulfate, 0.5~0.7 part of formaldehyde reducing agent.It is using the beneficial effect of technical solution of the present invention: urea-formaldehyde glue adhesive additive of the invention, reduce amount of the ureaformaldehyde viscose binder middle reaches from formaldehyde, improve the capability and performance of urea-formaldehyde glue, viscosity increased, and ureaformaldehyde viscose binder of the invention is at low cost, preparation is simple, convenient for promoting the use of.
Description
Technical field
The present invention relates to urea-formaldehyde glue technical field of adhesive, especially a kind of ureaformaldehyde viscose binder for being related to wood-based plate
Additive and preparation method thereof.
Background technique
Wood-based plate is centainly to be machined using timber or other culled wood plants as raw material and be separated into various unit materials
Afterwards, apply or do not apply plate or molded article made of adhesive and other additives are checked.It mainly include glued board, wood shavings
The three categories product such as plate and fiberboard, extension product and deep processed product reach hundreds of.The generation of wood-based plate improves timber
Comprehensive utilization ratio, 1 cubic metre of wood-based plate can replace 3~5 cubic metres of logs to use.
Formaldehyde is the raw material for manufacturing synthetic resin, paint, plastics and staple fibre, is wood-based panel industry manufacture Lauxite
The important source material of glue and phenolic resin glue.The places such as the new home of people and office will carry out interior decoration and purchase furniture,
Since finishing and Furniture manufacture will use a large amount of artificial boards, and produces wood-based plate and need the use of the high formaldehyde of toxicity to be largely original
The adhesive for expecting manufacture generally up to 15 years, causes formaldehyde to become room air since the Form aldehyde release phase in adhesive is very long
In major pollutants.Formaldehyde becomes more highly toxic substance, and formaldehyde is on China's toxic chemical priority acccess control list
Second.Formaldehyde is determined as carcinogenic and causes deformed material by the World Health Organization, is generally acknowledged allergen, and latent
Pressure mutation one of substance.Long Term Contact low dosage formaldehyde can cause chronic respiratory disease, cause nasopharyngeal carcinoma, brain tumor,
The gene mutation of nucleus, commissure and DNA and protein commissure and the reparation for inhibiting DNA damage in DNA one-sided love.
The method for reducing burst size of methanal in wood-based plate mainly has: (1) using low mole prop0rtion modified urea-formaldehyde resin adhesive；
(2) formaldehyde catching agent is added in ureaformaldehyde viscose binder in wood-based plate；(3) wood-based plate is post-processed.But these technologies
For scheme all there is defect, although (1) can be effectively reduced wood-based panel product using low mole prop0rtion modified urea-formaldehyde viscose binder
Burst size of methanal, but the check intensity of product often also reduces；(2) it is caught in wood-based plate with addition formaldehyde in ureaformaldehyde viscose binder
Agent is caught, although effectively reducing the burst size of free formaldehyde, reduces the bonding strength of wood-based plate simultaneously, and mention significantly
The high cost of adhesive；(3) equipment cost for post-processing, but post-processing to wood-based plate is often bigger.
Summary of the invention
The technical problem to be solved by the present invention is overcoming the deficiencies in the prior art, a kind of ureaformaldehyde glue bond is provided
Additive of agent and preparation method thereof.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of ureaformaldehyde viscose binder, by weight, consisting of: 400~500 parts of 36% formaldehyde, urea 200~
300 parts, 25~30 parts of melamine, 0.5~0.9 part of polyvinyl alcohol, mass fraction is 2~4 parts of ammonium hydroxide of 26%, dodecyl
0.6~0.8 part of sodium sulfonate, 0.5~0.7 part of formaldehyde reducing agent.
Further, the formaldehyde reducing agent by weight, consisting of: 4~6 parts of formaldehyde scavenger, stearic acid 0.2~
0.5 part, 1.8~2.0 parts of potassium chloride.
Further, 5 parts of the formaldehyde scavenger, 0.35 part of stearic acid, 1.9 parts of potassium chloride.
Further, the formaldehyde scavenger is selected from: one of thiocarbamide, melamine.
Further, 450 parts of 36% formaldehyde, 250 parts of urea, 27 parts of melamine, 0.7 part of polyvinyl alcohol, quality point
Number is 3 parts of ammonium hydroxide, 0.7 part of dodecyl sodium sulfate, 0.6 part of formaldehyde reducing agent of 26%.
The method for preparing above-mentioned ureaformaldehyde viscose binder, the method are as follows:
(1) 400~500 parts of formaldehyde of 36% are weighed by ratio of weight and the number of copies, 200~300 parts of urea, melamine 25~30
Part, 0.5~0.9 part of polyvinyl alcohol, mass fraction is 2~4 parts of ammonium hydroxide of 26%, 0.6~0.8 part of dodecyl sodium sulfate, is dropped
0.5~0.7 part of aldehyde agent.
(2) in step (1) weighed 36% formaldehyde is added in reaction kettle, 30~35 DEG C is warming up to, with 32~40%
Sodium hydroxide solution adjust pH value be 8.0, be added 150~200 parts of urea, be uniformly mixed, with 32~40% sodium hydroxide
It is 6.1~6.3 that solution, which adjusts pH value, is warming up to 90 DEG C, keeps the temperature 30~40min, obtains mixed liquor；
(3) it is 4.5~4.7 with the pH value of mixed liquor in acetic acid regulating step (2), mixed liquor is added drop-wise to 11~15 DEG C
In water, after reaction, then adjusting pH value with 32~40% sodium hydroxide solution is that adjust pH value be 6.8, adds 50~
Weighed melamine, polyvinyl alcohol, the ammonium hydroxide that mass fraction is 26%, dodecyl sodium sulfonate in 100 parts of urea, step 1
Sodium and formaldehyde reducing agent use 32~40% sodium hydroxide solution to adjust pH value again after mixing evenly, when mixed liquor is cooled to 35 DEG C
For 7.6~8.3 to get urea-formaldehyde glue.
Be using the beneficial effect of technical solution of the present invention: urea-formaldehyde glue adhesive additive of the invention reduces urea
The amount of free formaldehyde in aldehyde viscose binder, improves the capability and performance of urea-formaldehyde glue, and viscosity increased, and ureaformaldehyde of the invention
Viscose binder is at low cost, and preparation is simple, convenient for promoting the use of.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
Embodiment 1
A kind of ureaformaldehyde viscose binder, by weight, consisting of: 400 parts of 36% formaldehyde, 200 parts of urea, melamine
25 parts of amine, 0.5 part of polyvinyl alcohol, mass fraction is 2 parts of ammonium hydroxide, 0.6 part of dodecyl sodium sulfate, 0.5 part of formaldehyde reducing agent of 26%.
The mass parts of above-mentioned formaldehyde reducing agent form are as follows: 4 parts of thiocarbamide, 0.2 part of stearic acid, 1.8 parts of potassium chloride.
Above-mentioned ureaformaldehyde viscose binder the preparation method is as follows:
(1) 400 parts of formaldehyde of 36% are weighed by ratio of weight and the number of copies, 200 parts of urea, 25 parts of melamine, polyvinyl alcohol 0.5
Part, mass fraction is 2 parts of ammonium hydroxide, 0.6 part of dodecyl sodium sulfate, 0.5 part of formaldehyde reducing agent of 26%.
(2) in step (1) weighed 36% formaldehyde is added in reaction kettle, 30 DEG C is warming up to, with 32~40% hydrogen
It is 8.0 that sodium hydroxide solution, which adjusts pH value, is added 150 parts of urea, is uniformly mixed, and adjusts pH with 32~40% sodium hydroxide solution
Value is 6.1~6.3, is warming up to 90 DEG C, keeps the temperature 30~40min, obtains mixed liquor；
(3) it is 4.5~4.7 with the pH value of mixed liquor in acetic acid regulating step (2), mixed liquor is added drop-wise to 11 DEG C of water
In, after reaction, then with 32~40% sodium hydroxide solution adjust pH value be adjust pH value be 6.8, add 50 parts
Weighed melamine, polyvinyl alcohol, ammonium hydroxide, dodecyl sodium sulfate and the drop that mass fraction is 26% in urea, step 1
Aldehyde agent, use again after mixing evenly, when mixed liquor is cooled to 35 DEG C 32~40% sodium hydroxide solution adjust pH value be 7.6~
8.3 to get urea-formaldehyde glue.
Ureaformaldehyde viscose binder of the invention is added in wood-based plate, tests burst size of methanal 1.1mg/100g, meets E1 mark
It is quasi-.
Embodiment 2
A kind of ureaformaldehyde viscose binder, by weight, consisting of: 450 parts of 36% formaldehyde, 250 parts of urea, melamine
27 parts of amine, 0.7 part of polyvinyl alcohol, mass fraction is 3 parts of ammonium hydroxide, 0.7 part of dodecyl sodium sulfate, 0.6 part of formaldehyde reducing agent of 26%.
The mass parts of above-mentioned formaldehyde reducing agent form are as follows: 5 parts of melamine, 0.35 part of stearic acid, 1.9 parts of potassium chloride.
Above-mentioned ureaformaldehyde viscose binder the preparation method is as follows:
(1) 450 parts of formaldehyde of 36% are weighed by ratio of weight and the number of copies, 250 parts of urea, 27 parts of melamine, polyvinyl alcohol 0.7
Part, mass fraction is 3 parts of ammonium hydroxide, 0.7 part of dodecyl sodium sulfate, 0.6 part of formaldehyde reducing agent of 26%.
(2) in step (1) weighed 36% formaldehyde is added in reaction kettle, 35 DEG C is warming up to, with 32~40% hydrogen
It is 8.0 that sodium hydroxide solution, which adjusts pH value, is added 200 parts of urea, is uniformly mixed, and adjusts pH with 32~40% sodium hydroxide solution
Value is 6.1~6.3, is warming up to 90 DEG C, keeps the temperature 30~40min, obtains mixed liquor；
(3) it is 4.5~4.7 with the pH value of mixed liquor in acetic acid regulating step (2), mixed liquor is added drop-wise to 13 DEG C of water
In, after reaction, then with 32~40% sodium hydroxide solution adjust pH value be adjust pH value be 6.8, add 50 parts
Weighed melamine, polyvinyl alcohol, ammonium hydroxide, dodecyl sodium sulfate and the drop that mass fraction is 26% in urea, step 1
Aldehyde agent, use again after mixing evenly, when mixed liquor is cooled to 35 DEG C 32~40% sodium hydroxide solution adjust pH value be 7.6~
8.3 to get urea-formaldehyde glue.
Ureaformaldehyde viscose binder of the invention is added in wood-based plate, tests burst size of methanal 0.6mg/100g, meets E1 mark
It is quasi-.
Embodiment 3
A kind of ureaformaldehyde viscose binder, by weight, consisting of: 500 parts of 36% formaldehyde, 300 parts of urea, melamine
30 parts of amine, 0.9 part of polyvinyl alcohol, mass fraction is 4 parts of ammonium hydroxide, 0.8 part of dodecyl sodium sulfate, 0.7 part of formaldehyde reducing agent of 26%.
The mass parts of above-mentioned formaldehyde reducing agent form are as follows: 6 parts of melamine, 0.5 part of stearic acid, 2.0 parts of potassium chloride.
Above-mentioned ureaformaldehyde viscose binder the preparation method is as follows:
(1) 500 parts of formaldehyde of 36% are weighed by ratio of weight and the number of copies, 300 parts of urea, 30 parts of melamine, polyvinyl alcohol 0.9
Part, mass fraction is 4 parts of ammonium hydroxide, 0.8 part of dodecyl sodium sulfate, 0.7 part of formaldehyde reducing agent of 26%.
(2) in step (1) weighed 36% formaldehyde is added in reaction kettle, 35 DEG C is warming up to, with 32~40% hydrogen
It is 8.0 that sodium hydroxide solution, which adjusts pH value, is added 200 parts of urea, is uniformly mixed, and adjusts pH with 32~40% sodium hydroxide solution
Value is 6.1~6.3, is warming up to 90 DEG C, keeps the temperature 30~40min, obtains mixed liquor；
(3) it is 4.5~4.7 with the pH value of mixed liquor in acetic acid regulating step (2), mixed liquor is added drop-wise to 15 DEG C of water
In, after reaction, then with 32~40% sodium hydroxide solution adjust pH value be adjust pH value be 6.8, add 100 parts
Weighed melamine, polyvinyl alcohol, ammonium hydroxide, dodecyl sodium sulfate and the drop that mass fraction is 26% in urea, step 1
Aldehyde agent, use again after mixing evenly, when mixed liquor is cooled to 35 DEG C 32~40% sodium hydroxide solution adjust pH value be 7.6~
8.3 to get urea-formaldehyde glue.
Ureaformaldehyde viscose binder of the invention is added in wood-based plate, tests burst size of methanal 0.36mg/100g, meets E0 mark
It is quasi-.
Although above-described embodiment is described in detail technical solution of the present invention, technical side of the invention
Case is not limited to above embodiments, in the case where not departing from thought and objective of the invention, to technical solution of the present invention institute
Any change done falls within claims of the present invention limited range.
Claims (6)
1. a kind of ureaformaldehyde viscose binder, which is characterized in that by weight, consisting of: 400~500 parts of 36% formaldehyde, urine
200~300 parts of element, 25~30 parts of melamine, 0.5~0.9 part of polyvinyl alcohol, mass fraction is 2~4 parts of ammonium hydroxide of 26%,
0.6~0.8 part of dodecyl sodium sulfate, 0.5~0.7 part of formaldehyde reducing agent.
2. a kind of ureaformaldehyde viscose binder according to claim 1, which is characterized in that the formaldehyde reducing agent by weight,
Composition are as follows: 4~6 parts of formaldehyde scavenger, 0.2~0.5 part of stearic acid, 1.8~2.0 parts of potassium chloride.
3. a kind of ureaformaldehyde viscose binder according to claim 2, it is characterised in that: 5 parts of the formaldehyde scavenger, stearic acid
0.35 part, 1.9 parts of potassium chloride.
4. a kind of ureaformaldehyde viscose binder according to claim 2, which is characterized in that the formaldehyde scavenger is selected from: thiocarbamide,
One of melamine.
5. a kind of ureaformaldehyde viscose binder according to claim 1, which is characterized in that by weight, consisting of: 36%
450 parts of formaldehyde, 250 parts of urea, 27 parts of melamine, 0.7 part of polyvinyl alcohol, mass fraction is 3 parts of ammonium hydroxide of 26%, 12
0.7 part of sodium alkyl sulfonate, 0.6 part of formaldehyde reducing agent.
6. preparing a kind of method of ureaformaldehyde viscose binder as described in claim 1, which is characterized in that the method is as follows:
(1) 400~500 parts of formaldehyde of 36% are weighed by ratio of weight and the number of copies, 200~300 parts of urea, 25~30 parts of melamine,
0.5~0.9 part of polyvinyl alcohol, mass fraction is 2~4 parts of ammonium hydroxide of 26%, 0.6~0.8 part of dodecyl sodium sulfate, formaldehyde reducing agent
0.5~0.7 part.
(2) in step (1) weighed 36% formaldehyde is added in reaction kettle, 30~35 DEG C is warming up to, with 32~40% hydrogen
It is 8.0 that sodium hydroxide solution, which adjusts pH value, is added 150~200 parts of urea, is uniformly mixed, with 32~40% sodium hydroxide solution
Adjusting pH value is 6.1~6.3, is warming up to 90 DEG C, keeps the temperature 30~40min, obtains mixed liquor；
(3) it is 4.5~4.7 with the pH value of mixed liquor in acetic acid regulating step (2), mixed liquor is added drop-wise to 11~15 DEG C of water
In, after reaction, then with 32~40% sodium hydroxide solution adjust pH value be adjust pH value be 6.8, add 50~100
Part urea, weighed melamine, polyvinyl alcohol, the ammonium hydroxide that mass fraction is 26%, dodecyl sodium sulfate in step 1
And formaldehyde reducing agent, after mixing evenly, adjusting pH value with 32~40% sodium hydroxide solution again when mixed liquor is cooled to 35 DEG C is
7.6~8.3 to get urea-formaldehyde glue.
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| CN201711095822.2A CN109762495A (en) | 2017-11-09 | 2017-11-09 | A kind of ureaformaldehyde viscose binder and preparation method thereof |
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| CN201711095822.2A CN109762495A (en) | 2017-11-09 | 2017-11-09 | A kind of ureaformaldehyde viscose binder and preparation method thereof |
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Cited By (1)
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| CN115074063A (en) * | 2022-07-15 | 2022-09-20 | 费县凯鑫利木业有限公司 | Low-formaldehyde environment-friendly urea-formaldehyde glue for producing plates |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115074063A (en) * | 2022-07-15 | 2022-09-20 | 费县凯鑫利木业有限公司 | Low-formaldehyde environment-friendly urea-formaldehyde glue for producing plates |
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