CN101037576A - Formaldehyde elimination agent and preparation method thereof - Google Patents
Formaldehyde elimination agent and preparation method thereof Download PDFInfo
- Publication number
- CN101037576A CN101037576A CN 200710063499 CN200710063499A CN101037576A CN 101037576 A CN101037576 A CN 101037576A CN 200710063499 CN200710063499 CN 200710063499 CN 200710063499 A CN200710063499 A CN 200710063499A CN 101037576 A CN101037576 A CN 101037576A
- Authority
- CN
- China
- Prior art keywords
- formaldehyde
- urea
- eliminating agent
- formaldehyde eliminating
- quotient
- 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.)
- Granted
Links
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a formaldehyde eliminating agent and preparing method thereof. Weight proportioning of raw material for the formaldehyde eliminating agent is: 100-300 quotient of formaldehyde, 150-700 quotient of urea, 50-500 quotient of water, 10-80 quotient of accelerant, 0.1-5 quotient of stabilizer, and 1-20 quotient of catalyst. The preparing method includes steps: adding each component into reaction kettle in turn, stirring the mixture at temperature of 20-50 DEG C until equally mixed and whole dissolved, adjusting pH between 7.5-9.0, and stirring until stable. Advantages of the formaldehyde eliminating agent are: preparing cost is low, formaldehyde eliminating effect is evident and permanent when the formaldehyde eliminating agent is used with urea-formaldehyde resin glue or melamine modified urea-formaldehyde resin glue for synthetic plate of incompetent formaldehyde releasing amount and E2 level synthetic plate, making formaldehyde releasing amount of incompetent and E2 level middle/high density fiber board reach to E2 and E1 level separately and observably reducing preparing cost of the middle/high density fiber board without reducing mechanics capability of the synthetic plate.
Description
Technical field
The present invention relates to a kind of preparation of eliminating harmful chemical and preparation method thereof, particularly a kind of preparation of eliminating in formaldehyde and preparation method thereof that is used to.
Background technology
Along with improving constantly of living standards of the people, decorations, purchase new furniture and become usual thing in the people life.All kinds of wood-based plates of often a large amount of uses during decorations and furniture are made are as glued board, core-board, medium density fibre board (MDF), shaving board etc.In fact, the output of China's wood-based plate in 2005 has surpassed 6,000 ten thousand m
3, consume 3m per capita
2Wood-based plate.And the tackiness agent 90% that these wood-based plates use is urea-formaldehyde resin and modified product thereof, exists formaldehyde and discharges problem, usually becomes the main source that formaldehyde in indoor air is polluted.Though the burst size of methanal of these wood-based plates can be gradually in for some time descends, also can keep a metastable burst size for a long time after dropping to a certain degree.The formaldehyde pollution is very serious in China city, the newly-decorated household in rural area at present, generally exceeds the national standard several times.
Formaldehyde is the higher material of toxicity, preferentially controls on the list formaldehyde at China's noxious chemical and is in second.Formaldehyde has hormesis to eye, mucous membrane and respiratory tract, can cause chronic respiratory tract disease, allergic rhinitis, lower immune function etc., causes sleep disorder; Formaldehyde is considered to the potential carcinogenic substance, may be the inducement of rhinocarcinoma, laryngocarcinoma, skin carcinoma.Therefore, eliminate formaldehyde and pollute, purifying the air of a room more and more causes people's attention.
At present, people eliminate the main method that formaldehyde in indoor air pollutes and are to use formaldehyde eliminating agent.But, usual production of Xiao Shouing and the ubiquitous problem of patented technology product are in the market: 1, formaldehyde eliminating agent is on the high side, and elimination weak effect, it is limited and persistence effect is poor to show as within a certain period of time formaldehyde amount of cancellation, and the validity period of these formaldehyde eliminating agents has only several days time usually; 2, because most of formaldehyde eliminating agent using method are normally eliminated the formaldehyde that distributes by the surface that one or many is sprayed at wood-based plate or furniture, therefore not only use inconvenience, and, in addition, also has the defective of secondary pollution to the ancillary cost that the human consumer has brought; Though 3 some formaldehyde eliminating agent can be directly used in the urea-formaldehyde resin,, often cause the serious and Wood-based Panel Production efficient reduction of cost raising, wood-based plate mechanical properties decrease of wood-based plate so that produce the lower wood-based panel product of burst size of methanal.
For example, publication number is to disclose a kind of formaldehyde eliminating agent in the patent documentation of CN1404891A, owing to used hydrazide kind compound in the preparation process of this formaldehyde eliminating agent, therefore causes costing an arm and a leg of formaldehyde eliminating agent; In addition, the using method of this formaldehyde eliminating agent is with its even spraying or brushes on the surface of wood-based plate or the surfaces externally and internally of furniture, or, therefore make troubles, and increased human consumer's extra-expense to the human consumer with its an amount of vaporific being sprayed in the room air.
Publication number is to disclose a kind of urea-formaldehyde resin additive among the CN1382744, and this additive is by after urea and Mierocrystalline cellulose are added an amount of water dissolution, adds an amount of Tai-Ace S 150 and sodium hydroxide, adds solidifying agent again and makes as ammonia chloride.Though can directly joining, uses in the urea-formaldehyde resin adhesive this urea-formaldehyde resin additive so that eliminate residual free aldehyde in the urea-formaldehyde resin, but owing to contain urea in this additive, its mechanism of eliminating formaldehyde just is equivalent to reduce the mol ratio of urea-formaldehyde resin, therefore can cause the Joint strength of wood-based plate to descend; In addition, contain a large amount of Mierocrystalline celluloses in this additive, can increase the viscosity of urea-formaldehyde resin, therefore be not suitable for the production of shaving board and fiberboard.
Summary of the invention
Primary and foremost purpose of the present invention is the problem that exists at prior art, provide a kind of and can directly add the formaldehyde eliminating agent that uses in the urea-formaldehyde resin adhesive, the formaldehyde elimination factor height of this formaldehyde eliminating agent, effect is lasting and cost is low, make when preparing wood-based plate with the urea-formaldehyde resin that is added with this formaldehyde eliminating agent, can be in the production efficiency that can not reduce wood-based plate, do not improve under the prerequisite of Wood-based Panel Production cost, produce the environmental protection wood-based plate that mechanical property is good and burst size of methanal is low, fundamentally eliminate the formaldehyde pollution problem in the room air that wood-based plate and goods thereof bring.
For realizing the object of the invention, formaldehyde eliminating agent of the present invention is made up of following materials of weight proportions:
Formaldehyde 100-300 part; Urea: 150-700 part; Water: 50-500 part; Promotor: 10-80 part; Stablizer: 0.1-5 part; Catalyzer: 1-20 part.
Another object of the present invention provides a kind of method for preparing formaldehyde eliminating agent, may further comprise the steps:
1, carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde: 100-300 part
Urea: 150-700 part
Water: 50-500 part
Promotor: 10-80 part
Stablizer: 0.1-5 part
Catalyzer: 1-20 part
2, above-mentioned raw materials is added reactor successively, add fashionable the beginning and stir, the intensification temperature is controlled at 20-50 ℃, stirs;
3, be stirred to whole dissolvings, detect the pH value, finally adjust the pH value, continue to be stirred to steady state, sampling analysis, stored for future use 7.5～9.0.
Preferred especially above-mentioned raw materials is following weight proportion:
200 parts in formaldehyde; Urea: 250-400 part; Water: 150-450 part; Promotor: 20-50 part; Stablizer: 0.1-3 part; Catalyzer: 1-15 part.
Particularly, dispersion medium of the present invention is a water, and preferred distilled water or deionized water also can be high-quality well water.
Particularly, promotor is one or more of magnesium chloride, calcium chloride, Repone K, industrial sodium-chlor;
Particularly, stablizer is selected from one or more in borax, calcium metaborate, the sodium metaborate;
Particularly, catalyzer is selected from one or more of ammoniacal liquor, sodium hydroxide solution.
The advantage of product of the present invention is:
1, with burst size of methanal not up to standard in/high density fiberboard and E2 level in/urea-formaldehyde resin adhesive (UF) that high density fiberboard uses in producing or cyanurotriamide modified urea resin (MUF) be when glue is used, can make not up to standard in/burst size of methanal of high density fiberboard reaches the E2 level, make in the E2 level/burst size of methanal of high density fiberboard reaches the E1 level, and formaldehyde elimination effect is lasting, no longer bounce-back.
2, formaldehyde eliminating agent of the present invention can be used with UF or MUF, and does not reduce the production efficiency of wood-based plate.
3, because formaldehyde eliminating agent major ingredient of the present invention is formaldehyde and urea, low production cost, when being used for muf resin, alternative part or equivalent urea-formaldehyde resin, therefore can reduce the cost of high-grade product, and not influence every physical and mechanical property of the wood-based panel product of manufacturing.
4, formaldehyde eliminating agent of the present invention both can directly add in the glue process of urea-formaldehyde resin, also can use in the impregnation process of preparation wood-based plate, and was therefore easy to operate, used flexibly.
When 5, in building board production process, using formaldehyde eliminating agent of the present invention, do not need to adjust original processing parameter, do not need new facility investment.
Embodiment
Embodiment 1
1, carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 200kg
Water: 300kg
Calcium chloride: 20kg
Borax: 1kg
Urea: 350kg
Sodium hydroxide solution (concentration 30%): 2kg
2, above-mentioned raw materials is added reactor successively, add fashionable the beginning and stir, the intensification temperature is controlled at 40 ℃, stirs;
3, be stirred to whole dissolvings, solution is observed in sampling, does not have suspended substance, detects pH value, finally with concentration be 30% sodium hydroxide solution adjustment pH value at 8.5-9.0, continue to be stirred to steady state, sampling analysis, stored for future use.
The technical indicator of product sees Table 1.
The technical indicator of table 1 product
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 46-50 | 10-13 | 8.5-9.0 | 1.05-1.15 | ≥15 |
Although the intensification temperature in the present embodiment is 40 ℃, it can be controlled at the arbitrary temp value in the 20-50 temperature range.
Embodiment 2
1, carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 200kg
Water: 200kg
Calcium chloride: 50kg
Borax: 1kg
Urea: 350kg
Ammoniacal liquor (concentration 25%): 12kg
2, except that the intensification temperature be 20 ℃, pH value 7.5-8.0, all the other steps are identical with embodiment 1.
The technical indicator of product sees Table 2.
Table 2
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 52-56 | 11-13 | 7.5-8.0 | 1.10-1.20 | ≥15 |
Embodiment 3
1, carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 200kg
Water: 300kg
Calcium chloride: 40kg
Borax: 0.1kg
Urea: 400kg
Ammoniacal liquor (concentration 25%): 15kg
2, be that 50 ℃, pH value are the 7.5-8.0 except that the intensification temperature, all the other steps are identical with embodiment 1.
The technical indicator of technical target of the product sees Table 3
Table 3
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 52-56 | 11-13 | 7.5-8.0 | 1.10-1.20 | ≥15 |
Embodiment 4
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 200kg
Water: 150kg
Calcium chloride: 20kg
Borax: 3kg
Urea: 250kg
Ammoniacal liquor (concentration 25%): 1kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 4.
Table 4
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 52-56 | 11-13 | 8.5-9.0 | 1.10-1.20 | ≥15 |
Embodiment 5
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 100kg
Water: 250kg
Magnesium chloride: 20kg
Calcium metaborate: 3kg
Urea: 250kg
Sodium hydroxide (concentration 30%): 1kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 5.
Table 5
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 42-48 | 10-12 | 8.5-9.0 | 1.05-1.10 | ≥15 |
Embodiment 6
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 100kg
Water: 500kg
Magnesium chloride: 20kg
Calcium metaborate: 5kg
Urea: 700kg
Ammoniacal liquor (concentration 25%): 20kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 6.
Table 6
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 42-48 | 10-12 | 8.5-9.0 | 1.05-1.10 | ≥15 |
Embodiment 7
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 100kg
Water: 150kg
Magnesium chloride: 10kg
Calcium metaborate: 0.1kg
Urea: 150kg
Ammoniacal liquor (concentration 25%): 8kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 7.
Table 7
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 45-50 | 10-12 | 8.5-9.0 | 1.05-1.15 | ≥15 |
Embodiment 8
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration is 37%): 300kg
Water: 200kg
Repone K: 20kg
Calcium metaborate: 1kg
Urea: 350kg
Sodium hydroxide solution (concentration 30%): 2kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 8.
Table 8
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 42-48 | 10-12 | 8.5-9.0 | 1.05-1.10 | ≥15 |
Embodiment 9
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 300kg
Water: 150kg
Repone K: 50kg
Sodium metaborate: 1kg
Urea: 300kg
Ammoniacal liquor (concentration 25%): 12kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 9.
Table 9
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 50-56 | 10-12 | 8.5-9.0 | 1.05-1.15 | ≥15 |
Embodiment 10
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 200kg
Water: 50kg
Repone K: 10kg
Sodium metaborate: 0.1kg
Urea: 150kg
Ammoniacal liquor (concentration 25%): 8kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 10.
Table 10
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 46-52 | 10-12 | 8.5-9.0 | 1.05-1.10 | ≥15 |
Embodiment 11
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 300kg
Water: 200kg
Sodium-chlor: 20kg
Sodium metaborate: 3kg
Urea: 250kg
Sodium hydroxide solution (concentration 30%): 1kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 11.
Table 11
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 45-50 | 10-12 | 8.5-9.0 | 1.05-1.10 | ≥15 |
Embodiment 12
Carrying out raw material by following weight proportion gets the raw materials ready:
Formaldehyde (concentration 37%): 300kg
Water: 400kg
Sodium-chlor: 80kg
Sodium metaborate: 5kg
Urea: 700kg
Ammoniacal liquor (concentration 25%): 20kg
All the other steps are identical with embodiment 1.
The technical indicator of product sees Table 12.
Table 12
| Solids content (%) | Viscosity (being coated with-4 glasss) (25 ℃, S) | The pH value | Density (g/cm 3) | Storage period (20 ℃) (my god) |
| 55-65 | 11-13 | 8.5-9.0 | 1.10-1.20 | ≥15 |
Experimental example 1-12
During the medium density fibre board (MDF) of the burst size of methanal at the medium density fibre board (MDF) of being produced (burst size of methanal surpasses the E2 level, greater than 30mg/100g) not up to standard is produced, use the formaldehyde eliminating agent of embodiment of the invention 1-12 respectively.
The urea-formaldehyde resin mol ratio that adopts in this medium density fibre board (MDF) production not up to standard is 1.2, and viscosity is 11-16s (being coated with-4 glasss, 25 ℃), and solids content is 50%, and free formaldehyde content is 0.32%.Add the solid ammonium chloride of 0.5% weight part during use, stirring gets final product.
Experimental example 1-12 is to be to add in the above-mentioned urea-formaldehyde resin in 10: 100 and 25: 100 the formaldehyde eliminating agent of embodiment 1-12 by the part by weight of formaldehyde eliminating agent and urea-formaldehyde resin respectively, add solid ammonium chloride during use, the addition of ammonium chloride is 0.5% of the above-mentioned urea-formaldehyde resin gross weight that is added with formaldehyde eliminating agent, by normal process (resin added: 10%, hot pressing temperature: 180-190 ℃, hot pressing time: 20s/mm, pressure 4MPa.) produce the thick medium density fibre board (MDF) of 16mm, and the medium density fiber panel products of producing is carried out Performance Detection by GB/T17657-1999 " wood-based plate and face artificial board physicochemical property experimental technique " detection method, burst size of methanal detects with perforation method.
Reference examples 1
Adopt above-mentioned urea-formaldehyde resin (not adding formaldehyde eliminating agent of the present invention) in contrast, according to the thick medium density fibre board (MDF) of same explained hereafter 16mm.Detected result is as shown in table 13.
Table 13 medium density fibre board (MDF) performance test results
| Experimental example | Addition (%) | Burst size of methanal (mg/100g) | Compare formaldehyde with reference examples 1 and discharge reduction amount (%) | MOR (MPa) | Internal bond strength (MPa) |
| Experimental example 1 | 10 | 18 | 57.1 | 29 | 0.72 |
| 25 | 7 | 83.3 | 26 | 0.68 | |
| Experimental example 2 | 10 | 19 | 54.8 | 28 | 0.69 |
| 25 | 8 | 81.0 | 26 | 0.65 | |
| Experimental example 3 | 10 | 16 | 61.9 | 28 | 0.66 |
| 25 | 7 | 83.3 | 26 | 0.64 | |
| Experimental example 4 | 10 | 20 | 52.4 | 29 | 0.71 |
| 25 | 8 | 81.0 | 25 | 0.65 | |
| Experimental example 5 | 10 | 16 | 61.9 | 28 | 0.67 |
| 25 | 8 | 81.0 | 25 | 0.63 | |
| Experimental example 6 | 10 | 15 | 64.3 | 27 | 0.68 |
| 25 | 7 | 83.3 | 25 | 0.65 |
| Experimental example 7 | 10 | 18 | 57.1 | 28 | 0.67 |
| 25 | 8 | 81.0 | 26 | 0.65 | |
| Experimental example 8 | 10 | 21 | 50.0 | 28 | 0.69 |
| 25 | 9 | 78.6 | 25 | 0.66 | |
| Experimental example 9 | 10 | 23 | 45.2 | 29 | 0.74 |
| 25 | 10 | 76.2 | 27 | 0.66 | |
| Experimental example 10 | 10 | 20 | 52.4 | 29 | 0.69 |
| 25 | 8 | 81.0 | 27 | 0.67 | |
| Experimental example 11 | 10 | 21 | 50.0 | 29 | 0.69 |
| 25 | 10 | 76.2 | 26 | 0.67 | |
| Experimental example 12 | 10 | 13 | 69.0 | 29 | 0.68 |
| 25 | 6 | 85.7 | 27 | 0.67 | |
| Reference examples 1 | 0 | 42 | - | 28 | 0.67 |
As can be seen from the above table, formaldehyde eliminating agent of the present invention effectively reduces the not burst size of methanal of fiberboard up to standard, compared with the control, addition is 10% o'clock of urea-formaldehyde resin, can reduce burst size of methanal more than 50%, can make fibreboard product not up to standard reach national E2 grade standard, and mechanical property remains unchanged substantially, meet national standard.(burst size of methanal national standard: E2 level≤30mg/100g, E1 level≤9mg/100g; Wood-based plate mechanical property national standard: MOR 〉=20MPa, internal bond strength 〉=0.55MPa.)
Experiment finds that during 25% addition, the mechanical property of wood-based plate has the decline sign compared with the control.Therefore, addition is advisable to be no more than 25%.
Because additive of the present invention directly applies in the urea-formaldehyde resin, has fundamentally reduced burst size of methanal, therefore this elimination effect has chronicity.
Experimental example 13-24
Experimental example 13-24 uses the formaldehyde eliminating agent of embodiment of the invention 1-12 respectively for being in the medium density fibre board (MDF) production of E2 level at the medium density fibre board (MDF) of being produced.
The urea-formaldehyde resin mol ratio that adopts in this E2 level medium density fibre board (MDF) production is 1.1, and viscosity is 11-16s (being coated with-4 glasss, 25 ℃), and solids content is 50%, and free formaldehyde content is 0.18%.Add the solid ammonium chloride of 0.5% weight part during use, stirring gets final product.
The concrete experimental technique of experimental example 13-24 is to be to add in the above-mentioned urea-formaldehyde resin in 10: 100 and 25: 100 by the part by weight of formaldehyde eliminating agent and urea-formaldehyde resin respectively with the formaldehyde eliminating agent of embodiment 1-12, add solid ammonium chloride during use, the addition of ammonium chloride is 0.5% of the above-mentioned urea-formaldehyde resin gross weight that is added with formaldehyde eliminating agent, and stirring gets final product.(with experimental example 1-12) carries out medium density fibre board (MDF) production by normal process, and product is carried out Performance Detection.
Reference examples 2
Adopt above-mentioned urea-formaldehyde resin, except that not adding formaldehyde eliminating agent of the present invention, all the other are identical with experimental example 13-24, and are above-mentioned according to the thick medium density fibre board (MDF) of same explained hereafter 16mm.Detected result is as shown in table 14.
Table 14 medium density fibre board (MDF) performance test results
| Experimental example | Addition (%) | Burst size of methanal (mg/100g) | Formaldehyde discharges reduction amount (%) compared with the control | MOR (MPa) | Internal bond strength (MPa) |
| Experimental example 13 | 10 | 8 | 61.9 | 26 | 0.68 |
| 25 | 5 | 76.2 | 24 | 0.64 | |
| Experimental example 14 | 10 | 8 | 61.9 | 26 | 0.66 |
| 25 | 6 | 71.4 | 23 | 0.62 | |
| Experimental example 15 | 10 | 7 | 66.7 | 28 | 0.61 |
| 25 | 3 | 85.7 | 22 | 0.60 | |
| Experimental example 16 | 10 | 9 | 57.1 | 27 | 0.71 |
| 25 | 5 | 76.2 | 25 | 0.59 | |
| Experimental example 17 | 10 | 7 | 66.7 | 24 | 0.67 |
| 25 | 5 | 76.2 | 25 | 0.63 | |
| Experimental example 18 | 10 | 7 | 66.7 | 27 | 0.64 |
| 25 | 4 | 81.0 | 24 | 0.61 | |
| Experimental example 19 | 10 | 8 | 61.9 | 28 | 0.67 |
| 25 | 5 | 76.2 | 23 | 0.57 | |
| Experimental example 20 | 10 | 9 | 57.1 | 28 | 0.66 |
| 25 | 6 | 71.4 | 24 | 0.59 | |
| Experimental example 21 | 10 | 9 | 57.1 | 28 | 0.68 |
| 25 | 5 | 76.2 | 26 | 0.64 | |
| Experimental example 22 | 10 | 9 | 57.1 | 25 | 0.62 |
| 25 | 6 | 71.4 | 21 | 0.58 |
| Experimental example 23 | 10 | 9 | 57.1 | 26 | 0.68 |
| 25 | 6 | 71.4 | 24 | 0.59 | |
| Experimental example 24 | 10 | 7 | 66.7 | 25 | 0.64 |
| 25 | 3 | 85.7 | 24 | 0.60 | |
| Reference examples 2 | 0 | 21 | - | 25 | 0.64 |
As can be seen from Table 8, formaldehyde eliminating agent of the present invention effectively reduces the burst size of methanal of medium density fibre board (MDF), addition is 10% o'clock of urea-formaldehyde resin, can reduce burst size of methanal more than 57%, can make E2 level product reach national E1 grade standard (burst size of methanal national standard: E1 level≤9mg/100g); And mechanical property is constant substantially, meets national standard (wood-based plate mechanical property national standard: MOR 〉=20MPa, internal bond strength 〉=0.55MPa).
Experiment finds that during 25% addition, the mechanical property of wood-based plate has the decline sign compared with the control.Therefore, addition is advisable to be no more than 25%.
Because additive of the present invention directly applies in the urea-formaldehyde resin, has fundamentally reduced burst size of methanal, therefore this elimination effect has chronicity.
Claims (10)
1, a kind of formaldehyde eliminating agent is characterized in that being made up of following materials of weight proportions:
Formaldehyde 100-300 part
Urea 150-700 part
Water 50-500 part
Promotor 10-80 part
Stablizer 0.1-5 part
Catalyzer 1-20 part
2, formaldehyde eliminating agent as claimed in claim 1 is characterized in that the weight proportion of described raw material is preferably:
200 parts in formaldehyde
Urea 250-400 part
Water 150-450 part
Promotor 20-50 part
Stablizer 0.1-3 part
Catalyzer 1-15 part
3, formaldehyde eliminating agent as claimed in claim 1 or 2 is characterized in that described promotor is one or more in magnesium chloride, calcium chloride, Repone K, the industrial sodium-chlor.
4, formaldehyde eliminating agent as claimed in claim 1 or 2 is characterized in that described stablizer is selected from one or more in borax, calcium metaborate, the sodium metaborate.
5, formaldehyde eliminating agent as claimed in claim 1 or 2 is characterized in that described catalyzer is selected from one or both in ammoniacal liquor, the sodium hydroxide solution.
6, the preparation method of formaldehyde eliminating agent as claimed in claim 1 may further comprise the steps:
A), carrying out raw material by described weight proportion gets the raw materials ready;
B), described raw material is added reactor successively, add fashionable the beginning and stir, the intensification temperature is controlled at 20-50 ℃, stirs;
C), be stirred to whole dissolvings, detect pH value, adjustment pH value is at 7.5-9.0.
7, preparation method as claimed in claim 6 is characterized in that the weight proportion of described raw material is preferred:
200 parts in formaldehyde
Urea 250-400 part
Water 150-450 part
Promotor 20-50 part
Stablizer 0.1-3 part
Catalyzer 1-15 part
8,, it is characterized in that described promotor is one or more of magnesium chloride, calcium chloride, Repone K, industrial sodium-chlor as claim 6 or 7 described preparation methods.
9,, it is characterized in that described stablizer is selected from one or more in borax, calcium metaborate, the sodium metaborate as claim 6 or 7 described preparation methods.
10,, it is characterized in that described catalyzer is selected from one or both in ammoniacal liquor, the sodium hydroxide solution as claim 6 or 7 described formaldehyde eliminating agents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100634990A CN101037576B (en) | 2007-02-02 | 2007-02-02 | Formaldehyde elimination agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100634990A CN101037576B (en) | 2007-02-02 | 2007-02-02 | Formaldehyde elimination agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101037576A true CN101037576A (en) | 2007-09-19 |
| CN101037576B CN101037576B (en) | 2010-08-25 |
Family
ID=38888755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100634990A Expired - Fee Related CN101037576B (en) | 2007-02-02 | 2007-02-02 | Formaldehyde elimination agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101037576B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086361A (en) * | 2010-06-28 | 2011-06-08 | 永港伟方（北京）科技股份有限公司 | High-efficiency extender for environmentally-friendly urea formaldehyde resin, and preparation and use thereof |
| CN101125212B (en) * | 2007-09-24 | 2011-06-15 | 北京林业大学 | Formaldehyde absorptive reagent and preparation process thereof |
| CN102399514A (en) * | 2011-10-13 | 2012-04-04 | 北京林业大学 | Formaldehyde eliminating agent and preparation method thereof |
| CN107485992A (en) * | 2017-09-15 | 2017-12-19 | 安徽中弘科技发展有限公司 | A kind of formaldehyde eliminating agent and preparation method thereof |
| CN107694323A (en) * | 2017-11-24 | 2018-02-16 | 宁夏浦士达环保科技有限公司 | Modifying agent, the modified high-efficient for removing formaldehyde remove formaldehyde activity charcoal and preparation method |
| CN107802979A (en) * | 2017-09-20 | 2018-03-16 | 苏州科技大学 | The method that interior decoration removes formaldehyde |
| CN110237662A (en) * | 2019-07-08 | 2019-09-17 | 石家庄常宏建筑装饰工程有限公司 | The plate aldehyde remover and preparation method thereof of anion can be discharged |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547350A (en) * | 1983-02-09 | 1985-10-15 | Gesser Hyman D | Abatement of indoor pollutants |
| CN1463753A (en) * | 2002-06-11 | 2003-12-31 | 成都航利生物材料研究所 | Novel methylene oxide scavenging agent |
-
2007
- 2007-02-02 CN CN2007100634990A patent/CN101037576B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125212B (en) * | 2007-09-24 | 2011-06-15 | 北京林业大学 | Formaldehyde absorptive reagent and preparation process thereof |
| CN102086361A (en) * | 2010-06-28 | 2011-06-08 | 永港伟方（北京）科技股份有限公司 | High-efficiency extender for environmentally-friendly urea formaldehyde resin, and preparation and use thereof |
| CN102086361B (en) * | 2010-06-28 | 2013-09-18 | 永港伟方（北京）科技股份有限公司 | High-efficiency extender for environmentally-friendly urea formaldehyde resin, and preparation and use thereof |
| CN102399514A (en) * | 2011-10-13 | 2012-04-04 | 北京林业大学 | Formaldehyde eliminating agent and preparation method thereof |
| CN102399514B (en) * | 2011-10-13 | 2013-03-20 | 北京林业大学 | Formaldehyde eliminating agent and preparation method thereof |
| CN107485992A (en) * | 2017-09-15 | 2017-12-19 | 安徽中弘科技发展有限公司 | A kind of formaldehyde eliminating agent and preparation method thereof |
| CN107802979A (en) * | 2017-09-20 | 2018-03-16 | 苏州科技大学 | The method that interior decoration removes formaldehyde |
| CN107694323A (en) * | 2017-11-24 | 2018-02-16 | 宁夏浦士达环保科技有限公司 | Modifying agent, the modified high-efficient for removing formaldehyde remove formaldehyde activity charcoal and preparation method |
| CN110237662A (en) * | 2019-07-08 | 2019-09-17 | 石家庄常宏建筑装饰工程有限公司 | The plate aldehyde remover and preparation method thereof of anion can be discharged |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101037576B (en) | 2010-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101037576A (en) | Formaldehyde elimination agent and preparation method thereof | |
| CN1298769C (en) | Self-photoinitiating multifunctional acrylates | |
| CN1495146A (en) | Universal oil well cement additive and method | |
| CN1007729B (en) | Water-absorbent resin composition | |
| CN1207087A (en) | Novel binding phase for phosphorus-magnesium cements and use thereof | |
| CN1820806A (en) | General multifunctional foam fire-extinguishing agent and its preparing method | |
| CN1128530A (en) | Flame-resistant polycarbamide foam | |
| CN88102433A (en) | The condition that is used for tooth or sclerotin forms liquid | |
| CN1183118C (en) | 4-alkoxy-cyclohexane-1-amino-carboxylic acid esters and method for the production thereof | |
| CN1948212A (en) | Inner wall surface decoration material and its preparation method | |
| CN1878573A (en) | Deodorant and deodorizing article | |
| CN1450015A (en) | Building material additives with automatic humidity-regulating function and preparation process and use thereof | |
| CN100337761C (en) | Waste construction material soil conversion method | |
| CN1603547A (en) | Wall surface decoration material | |
| CN101028254A (en) | Sustaining agent of Duosuo theosine and its preparation | |
| CN1317396C (en) | Leather tanning agent of modified aminoresin and preparation method thereof | |
| CN1403522A (en) | Composite adhesive specially for heat insulating polystyrene outer-wall board | |
| CN1852885A (en) | Method for producing nitrile compound, carboxylic acid compound or carboxylate compound | |
| CN1907955A (en) | Method of preparing potassium phenylaminoacetate in industrial scale from acrylonitrile apparatus by-product formonitrile | |
| CN1040202C (en) | Mineral-fiber compositions | |
| CN1911976A (en) | Rubber powder/acrylic acid/montmorillonite high water absorption resin and its synthesis method | |
| CN1048999C (en) | Filtering-loss reducing agent of humic resin and its prepn | |
| CN1233715C (en) | Cross-linked shperical macroporous cellulose bead and clean preparing process by jetting method | |
| CN1301317C (en) | Environment-friendly coke-saving liquid agent and preparation method and application thereof | |
| CN1727427A (en) | Adhesive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100825 Termination date: 20170202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |