CN105199065B - A kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method - Google Patents
A kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method Download PDFInfo
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- CN105199065B CN105199065B CN201510621210.7A CN201510621210A CN105199065B CN 105199065 B CN105199065 B CN 105199065B CN 201510621210 A CN201510621210 A CN 201510621210A CN 105199065 B CN105199065 B CN 105199065B
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Abstract
The present invention proposes a kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method, including the following various components of weight proportion：Formaldehyde：36% 4000 parts of formalin；Carbonyl diamide：2400 parts 2700 parts；Melamine：450 parts；Water：500 parts；Auxiliary agent：45 parts, the auxiliary agent is hexa, and including hexa, wherein the molar ratio of formaldehyde and carbonyl diamide is 1.09, to solve the problem of in the prior art composite material burst size of methanal it is excessively high and meanwhile when handling formaldehyde it is with high costs.
Description
Technical field
The invention belongs to interior decoration technical field, more particularly to a kind of low formaldehyde urine glue and low formaldehyde urine glue preparation side
Method.
Background technology
At present, domestic and international more than 90% furniture of composite material employs the manufacture of formaldehydes adhesive, therefore, no matter taking
Which kind of drop aldehyde measure, final products always have the release of free formaldehyde, different degrees of so as to be caused to indoor air quality
It influences.For molded furniture of composite material, to reduce its burst size of methanal needs to improve environmental protection grade in other words, generally adopts
With coating process, closing method or display method.Coating process is that the chemical substance that will be chemically reacted and cleared up with formaldehyde is coated in
The surface of furniture is coated agent after the formaldehyde of inside of furniture migrates or diffuses to surface and captures and degrade, but its deficiency
It is in furniture item surface compact, coating agent is difficult to penetrate into capture of the inside of furniture to free formaldehyde, thus its effect only limits
In surface effect, belong to passive-type drop aldehyde technology, and coating agent has a timeliness in itself, and furniture of composite material first
Aldehyde release time is 5~15 years or more, therefore technology drop aldehyde effect is very limited.Closing method is by molded furniture
The materials such as part surface wax, paint, adhesive are applied, and free formaldehyde is sealed in inside of furniture, slows down formaldehyde
Rate of release, this method is simple and effective, but implementation is relatively difficult, and sawed-off face when particularly furniture room is mated formation is difficult to carry out envelope
Close, also closed material with the variation of time and environmental condition, itself can generate it is a large amount of it is microcosmic on channel, therefore long-term effect
Fruit is difficult to keep.The method of displaying is to store furniture finished product for a long time, the free formaldehyde in furniture is made to extend at any time, the change of humiture
Change and natural degradation, this method has the advantages that be not required to substance input, but due under natural conditions environment temperature it is too low, formaldehyde divides
Sub- kinetic energy is insufficient, can not effectively overcome adsorption energy and be difficult to natural degradation in the short term, this is Furniture manufacturing person and consumer
It is flagrant.
Therefore, it in view of said program is in actual fabrication and in place of implementing using upper missing, and corrected, improved, together
When in line with the spirit and theory asked, and by profession knowledge, the auxiliary of experience and multi-party clever thought, experiment after, just found
Go out the present invention, spy provides a kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method, can not only substantially reduce composite material again
The content of release formaldehyde in air, and additional processing is not needed to, it is of low cost.
Invention content
The present invention proposes a kind of low formaldehyde urine glue, solves composite material releasable for maldehyde content in air in the prior art
It is excessively high, and need, by different processing, to lead to the problem of with high costs.
The technical proposal of the invention is realized in this way：The present invention provides a kind of low formaldehyde urine glue, including weight proportion such as
Under various components：The formalin of 36% concentration：4000 parts；Carbonyl diamide：2400-2700 parts；Melamine：450 parts；
Water：500 parts；Auxiliary agent：45 parts.
As a preferred embodiment, auxiliary agent is methenamine, including hexa.
As a preferred embodiment, the molar ratio of formaldehyde and carbonyl diamide is in the low formaldehyde urine glue of the present invention
1.09。
On the other hand, the present invention also provides a kind of low formaldehyde urine glue preparation method, including step：
S101：Add 45 parts of auxiliary agents；
S201：The formalin of 4000 parts a concentration of 36% of addition, and adjust pH value and rise to 9.0；
S301：Add 1500-1800 parts of carbonyl diamides；
S401：Add 450 parts of melamines；
S501：Surplus 900 carbonyl diamides of addition；
S601：Add 500 parts of water.
As a preferred embodiment, the auxiliary agent is hexa, including hexa.
Lye or organic is added as a preferred embodiment, adjusting pH value in the step S201 and being used to 9.0
The mode of alkali realizes that the lye includes sodium hydroxide solution, and the organic base includes triethanolamine, triethylamine, triethylene two
Any one or a few in amine, tetramethylethylenediamine.
As a preferred embodiment, it is additionally provided with step S302 after the step S301：Heated, risen
Then temperature keeps the temperature 30min-40min to 80 DEG C or more.
As a preferred embodiment, it is additionally provided with step S303 after the step S302：Addition acid, adjusts pH value
It is down to 5.5-6.0.
As a preferred embodiment, the acid is any one or a few in hydrochloric acid, sulfuric acid or nitric acid.
As a preferred embodiment, it is additionally provided with step S701 after the step S601：Cooling processing is adjusted to 70 DEG C
Section viscosity reaches four glasss of the painting using 100 ± 1ml, drop net time 13S.
After employing above-mentioned technical proposal, the beneficial effects of the invention are as follows：Using rational in the low formaldehyde urine glue of the present invention
Formaldehyde, carbonyl diamide, melamine weight proportion, and using hexa as auxiliary agent, and pass through and add phosphinylidyne in two times
Diamines and first control raw material react in alkaline environment, then the sequence to react in acidic environment, along with each
Temperature control during reaction, makes the comparison that reaction carries out abundant, and the fracture of ehter bond is less, and the formaldehyde to dissociate in air is reduced, and
And hydroxyl cross-linking reaction in the process greatly strengthens intensity and humidity resistance, has not only ensured the feature of environmental protection of product, but also ensure product
Practicability.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow chart that the low formaldehyde of the present invention urinates glue preparation method.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
The low formaldehyde urine glue of the present invention, including the following various components of weight proportion：A concentration of 36% formalin：
4000 parts；Carbonyl diamide：2400 parts；Melamine：450 parts；Water：500 parts；Auxiliary agent：45 parts.
Embodiment two
The low formaldehyde urine glue of the present invention, including the following various components of weight proportion：A concentration of 36% formalin：
4000 parts；Carbonyl diamide：2500 parts；Melamine：450 parts；Water：500 parts；Auxiliary agent：45 parts.
Embodiment three
The low formaldehyde urine glue of the present invention, including the following various components of weight proportion：A concentration of 36% formalin：
4000 parts；Carbonyl diamide：2600 parts；Melamine：450 parts；Water：500 parts；Auxiliary agent：45 parts.
With reference to reference to as shown in Figure 1, the preparation method flow of this low formaldehyde urine glue is discussed in detail, including step：
S101：Add 45 parts of auxiliary agents；
S201：The formalin of 4000 parts a concentration of 36% of addition, and adjust pH value and rise to 9.0；
S301：Add 1600 parts of carbonyl diamides；
S302：Heated, be warming up to 80 DEG C or more, then keep the temperature 30min-40min；
S303：Acidic buffer is added, pH value is adjusted and is down to 5.5-6.0；
S401：Add 450 parts of melamines；
S501：Surplus 900 carbonyl diamides of addition；
S601：Add 500 parts of water.
S701：To 70 DEG C, adjusting viscosity reaches four glasss of the painting using 100 ± 1ml, drop net time 13S for cooling processing.
Based on above-mentioned design, the present invention is specifically disclosed directly below：
S101：Add 45 parts of auxiliary agents；Hexa may be used in auxiliary agent.
S201：The formalin of 4000 parts a concentration of 36% of addition, and adjust pH value and rise to 9.0；Due to the PH of formaldehyde
Value is approximately equal to neutrality 7.0 or so, adjusts pH value by adding sodium hydroxide solution or other alkaline buffers and is raised to
9.0, wherein alkaline buffer can be organic lye such as triethanolamine, triethylamine, in triethylene diamine, tetramethylethylenediamine
Any one or a few.
Treat that pH value performs step S301 after being stable at 9.0：1500 parts of carbonyl diamides are added, 4000 parts a concentration of 36%
Two-step reaction occurs under alkaline condition for formalin and 1600 parts of carbonyl diamides, in order to make reaction more abundant, in step
Step S302 is additionally provided with after S301：Heated, be warming up to 80 DEG C or more, and keep the temperature 30-45min, in this mistake
Formaldehyde mainly reacts with carbonyl diamide in journey, the first step：NH2CON H2+HCHO→NH2CONHCH2OH；Second step：
NH2CONHCH2OH+HCHO → HOCH2NHCONHCHOH, the i.e. first step and second step generation methylolurea element.
Step S303 is additionally provided with after step S302：PH value adjustment is carried out, makes the pH value stabilization of liquid in 5.5-6.0
Between, realized in the process by addition acidic buffer, it is specific acid slow in liquid may be used nitric acid, sulfuric acid, formic acid or
Any one in person's hydrochloric acid, wherein preferred nitric acid, after pH value stabilization is between 5.5-6.0, then carries out at heat preservation
Reason, processing time are advisable with more than 30min, at this time in acid condition, when methylolurea element solution is acidified, form hydroxyl first
The exothermic reaction of base urea：-NHCONH2+HOCH2NHCONH→-[NHCONHCH2NHCONH]-+H2O.
Step S401 is provided with after step S303：Add 450 parts of melamines；Melamine is sent out with methylolurea element
Raw addition reaction, one, two ... production melamine methylol of generation, generally mainly with monohydroxy melamine and dihydroxymethyl three
Based on poly cyanamid, in order to further promote the progress of reaction；Step S501 is successively provided with after step S402：Addition is surplus
900 parts of carbonyl diamides add carbonyl diamide in the later stage of reaction, can absorb because of the free first that temperature is excessively high and generates
Aldehyde, and since crosslink density increases, the dry strength and wet strength of plank are further improved, simultaneously because previous reaction
The control of middle temperature is excessively high, easily generates formaldehyde, and adding carbonyl diamide can be with；And and step S601：500 parts of water are added,
There is step S701 after step S601：Cooling processing is to 70 DEG C, and adjusting viscosity reaches four glasss of the painting using 100 ± 1ml, when dripping net
Between 13S, plastic mass is best at this time, and further improves its strength character and humidity resistance, and formaldehyde is water-soluble in present embodiment
The molar ratio of formaldehyde and melamine in liquid is 1.09.
With methylol urea solution before polycondensation reaction occurs for melamine methylol, generates copolymer resins, is set in copolymerization
During fat is formed, the connection between melamine and carbonyl diamide mainly passes through the methylene bridge between methylolation product
Key and ehter bond are formed by connecting, and at suitable temperature and acid or alkali environment, the absorption peak of methylol is in high state, copolymerization
Resin finally becomes tridimensional network.And basis of the methylol as entire curing reaction, in whole process, methylol it
Between cross-linking reaction, methylolurea or melamine methylol and reactive hydrogen remaining in melamine between react, ehter bond
Fracture transformation I, a fracture part for ehter bond is converted into free formaldehyde under heat effect, due to being used in step S402
Cool down processing mode, make its temperature reach 70 DEG C hereinafter, therefore and further reduced in air dissociate formaldehyde, contain it
Amount is significantly less than the content of the B grades technology requirement 3.0mg/L of national regulation, but has reached 0.6mg/L, makes to exist due to formaldehyde
And cause to minimize the risk that human body damages.
It should be pointed out that effect is most at 1600 parts for the number of the carbonyl diamide in present embodiment in step S301
It is good, but control its weight proportion that can meet the production requirement of low formaldehyde urine glue at 1500 parts to 1800 parts, and step
The number of carbonyl diamide effect at 900 parts reaches best, but other also can be basic in range internal control carbonyl diamide in S501
It meets the requirements.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (4)
1. a kind of low formaldehyde urine glue preparation method, which is characterized in that including step：
S101：Add 45 parts of auxiliary agents；
S201：A concentration of 36% 4000 parts of formalin is added, and adjusts pH value and rises to 9.0；
S301：Add 1500 parts of -1800 parts of carbonyl diamides；
Step S302 is additionally provided with after the step S301：Heated, be warming up to 80 DEG C or more, then keep the temperature 30min-
40min；
Step S303 is additionally provided with after the step S302：Acid solution is added, pH values is adjusted and is down to 5.5-6.0；
S401：Add 450 parts of melamines；
S501：Add remaining 900 parts of carbonyl diamides；
S601：Add 500 parts of water.
2. low formaldehyde urine glue preparation method according to claim 1, which is characterized in that the auxiliary agent is hexa-methylene four
Amine.
3. low formaldehyde urine glue preparation method according to claim 1, which is characterized in that the formaldehyde and the carbonyl diamide
Molar ratio be 1.09.
4. low formaldehyde urine glue preparation method according to claim 1, which is characterized in that adjust pH in the step S201
Value realizes that the lye includes sodium hydroxide to 9.0 by the way of addition lye or organic base.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510621210.7A CN105199065B (en) | 2015-09-25 | 2015-09-25 | A kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510621210.7A CN105199065B (en) | 2015-09-25 | 2015-09-25 | A kind of low formaldehyde urine glue and low formaldehyde urine glue preparation method |
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| CN105199065B true CN105199065B (en) | 2018-06-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103740052B (en) * | 2013-12-09 | 2015-11-18 | 辽宁盖亚科技开发有限责任公司 | Water sucting glue and preparation method thereof, application |
| CN103666351B (en) * | 2013-12-13 | 2017-05-03 | 广西大学 | Modified urea-formaldehyde glue for base material laminated board of laminated solid wood floor and preparation method thereof |
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Effective date of registration: 20190301 Address after: 262700 South Side of Fuji Road, Shouguang City, Weifang City, Shandong Province Patentee after: SHANDONG HONSOAR CABINET MATERIAL CO., LTD. Address before: 262700 Fuji Street 678, Dongcheng Industrial Park, Shouguang City, Weifang City, Shandong Province Patentee before: SHOUGUANG DONGYU HONGXIANG WOOD INDUSTRY CO., LTD. |