CN102391805A - Modified urea-formaldehyde resin adhesive for concrete formwork and production method of adhesive - Google Patents
Modified urea-formaldehyde resin adhesive for concrete formwork and production method of adhesive Download PDFInfo
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- CN102391805A CN102391805A CN2011102005951A CN201110200595A CN102391805A CN 102391805 A CN102391805 A CN 102391805A CN 2011102005951 A CN2011102005951 A CN 2011102005951A CN 201110200595 A CN201110200595 A CN 201110200595A CN 102391805 A CN102391805 A CN 102391805A
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- formaldehyde resin
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- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical class OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 title claims abstract description 22
- 239000000853 adhesive Substances 0.000 title claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000009415 formwork Methods 0.000 title abstract 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 63
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004202 carbamide Substances 0.000 claims abstract description 39
- 239000002253 acid Substances 0.000 claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 51
- 239000000376 reactant Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 19
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims description 11
- 150000001912 cyanamides Chemical class 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 abstract description 3
- 229920000877 Melamine resin Polymers 0.000 abstract 1
- 235000019256 formaldehyde Nutrition 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 11
- 239000003292 glue Substances 0.000 description 11
- 229920001807 Urea-formaldehyde Polymers 0.000 description 7
- 239000002585 base Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000007731 hot pressing Methods 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 244000166124 Eucalyptus globulus Species 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000006068 polycondensation reaction Methods 0.000 description 3
- NPJDPKXNWFMWHO-UHFFFAOYSA-N C=O.NC(N)=O.NC#N Chemical compound C=O.NC(N)=O.NC#N NPJDPKXNWFMWHO-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- -1 cyanurotriamide modified urea-formaldehyde resin Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Phenolic Resins Or Amino Resins (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a modified urea-formaldehyde resin adhesive for a concrete formwork, which is mainly prepared from the following raw materials in parts by weight: 50 to 60 parts of formaldehyde with the mass concentration of 37 percent, 20 to 30 parts of urea with purity of 98 percent, 6 to 8 parts of melamine, 0.1 to 0.2 part of tackifier and 0.2 to 0.3 part of accelerant. The adhesive has an Uron-ring improved structure, so that the waterproofness of the formwork can be improved. The invention also discloses a production method of the adhesive, which comprises three steps of strong acid, weak acid and weak base. The reaction between the formaldehyde and the urea under a strong acid reaction condition can be effectively controlled by controlling temperature, pH value, charging speed, charging time and molar ratio. Meanwhile, two endpoint control indexes which are simple and convenient and are easy to operate are provided, and therefore processing implementing can be controlled conveniently and accurately.
Description
Technical field
The invention belongs to the modified urea-formaldehyde resin adhesive field, relate in particular to a kind of concrete form with modified urea-formaldehyde resin adhesive and working method thereof.
Background technology
In recent years, China one jumped and became Wood-based Panel Production big country in the world, and national wood-based plate output in 2009 reaches 11546.65 ten thousand steres, and wherein wood veneer accounts for 4451.24 ten thousand steres.Concrete (building) template is the main application of wood veneer, and it mainly is used in outdoor, not only wants load-bearing will withstand also that burning sun tans by the sun and the drip washing of bust shower must not be ftractureed; Simultaneously, the necessary repeatedly dismounting of concrete form, use repeatedly are to reduce the consumption of capital construction cost and timber.In order to detect the bonding strength of concrete form; Plywood for concrete form standard GB/T 17656-2008 has adopted among standard GB/T 17657-1999 (Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels) detection method about type, and promptly the sample bonding strength must be boiled the test of baking circulation method through boiled 28 hours of being formed in four hours by twice boiling water.
As everyone knows, the physical and mechanical property index of wood-based plate mainly relies on the resin adhesive that is adopted to guarantee.If adopt the good resol of water tolerance can obtain well (to wet) bonding strength, but the phenolic glue price is higher, and solidification value is high, speed is slow, and is very strict to the veneer water content requirement.Therefore, many in the market with cyanurotriamide modified at high proportion urea-formaldehyde resin adhesive.Wherein, the trimeric cyanamide urea-formaldehyde glue of alternative phenolic glue has been introduced in the timber mill, Sanya, and its proportioning raw materials is a trimeric cyanamide: urea=(0.5～0.7): 1 (mass ratio); F/U＞2 (mol ratio of formaldehyde and urea), manufacturing processed can be summarized as weak base-weak acid-weak base three steps (Chen Bin, trimeric cyanamide urea-formaldehyde glue 1# and the application on concrete form thereof; Forest product industry; 2001,3,34).Strong acid (pH＜3) technology has the advantage (being that formaldehyde and urea generate the strong Uron ring structure of certain proportion water tolerance) of improving the urea-formaldehyde resin structure; But produce gel owing to speed of response under the strong acid condition is exceedingly fast, be prone to make the inventory disposal of whole pot, therefore; From security consideration, all do not adopt usually.For this reason, Xibei Forest College has proposed a kind of preparation method who is used for the urea-formaldehyde resin of wood veneer, adopts F/U=1.7; Manufacturing processed is strong acid-weak acid-weak base three steps, omnidistance controlled temperature≤40 ℃ (Chang Juncheng, the research of urea and formaldehyde reaction relation in strong acid media; Bonding; 1992,1,1-2); Chinese patent " a kind of industrialized preparing process of urea-formaldehyde resin " (patent No. 200910030661.8 open days on 09 23rd, 2009) proposes to add stopper to produce a kind of urea-formaldehyde resin that is used for wad in the strong acid stage, and its finished product burst size of methanal is less than 28mg/100g.Yet the correlated response thing is all very responsive to temperature, feed rate, mol ratio, pH value and the residence time under the strong acid, no matter is control low temperature or adding stopper, all has certain degree of difficulty.
Summary of the invention
The technical problem that the present invention will solve provides a kind of well behaved concrete form and uses modified urea-formaldehyde resin adhesive.
Another technical problem that the present invention will solve provides the working method of the simple and clear and lower-cost concrete form of a kind of safe and reliable, easy operation, terminal point control with modified urea-formaldehyde resin adhesive.
Adopt following technical scheme for solving the problems of the technologies described above the present invention: concrete form is used modified urea-formaldehyde resin adhesive, is mainly processed by the raw material of following parts by weight: 20～30 parts in the urea of 50～60 parts in the formaldehyde of mass concentration 37%, purity 98%, 6～8 parts of trimeric cyanamides, 0.1～0.2 part of tackifier, 0.2～0.3 part of promotor.
Tackifier are Z 150PH; Promotor is vulkacit H, Dyhard RU 100 or both mixtures.
Raw material also comprises an amount of sodium hydroxide and hydrochloric acid.
Concrete form is with the working method of modified urea-formaldehyde resin adhesive, and this method may further comprise the steps:
< 1>formaldehyde and Z 150PH are dropped in the reaction kettle, agitator, the beginning heat temperature raising, temperature-stable adds mass concentration 30～36% in the time of 47～48 ℃ salt acid for adjusting pH value is 1.7～2.0;
<2>Temperature-stable added first urea equably in 7～12 minutes in the time of 51～53 ℃, it is F/U that its amount should make the mol ratio of reinforced back formaldehyde and urea
1=2.8～3.0, temperature rises to 81～85 ℃;
<3>Using the aqueous sodium hydroxide solution adjusting pH of mass concentration 25～30% immediately is 5.5～6.2, when temperature is 81～85 ℃, adds second batch of urea equably, and it is F/U that its amount should make the mol ratio of formaldehyde and urea
1+2=2.1～2.3; Stir to add after 10 minutes and account for first trimeric cyanamide of total trimeric cyanamide amount 25～40% and first promotor that accounts for total promotion dosage 1/3; Checking and adjust reactant pH is 6.8～7.2; Use muddy some method observation reactant at water form, to be white in color vaporific in 30 ℃ of water be first terminal point when reactant drips to;
< 4>reach first terminal point after, it is 7.5～8.5 that the aqueous sodium hydroxide solution that adds mass concentration 25～30% is regulated pH, adds residue trimeric cyanamide and promotor, controlled temperature stirred 20 minutes at 82 ± 1 ℃;
< 5>add residue urea, 78 ± 2 ℃ of reactions down, uses muddy some method to observe reactant at water form, to be white in color vaporific in 55～65 ℃ of water be second terminal point when reactant drips to;
< 6>reach and begin cooling behind second terminal point, when temperature was reduced to 35～45 ℃, it was 7.5～8.0 back dischargings that the aqueous sodium hydroxide solution that adds mass concentration 25～30% is regulated pH.
Contriver's abandoning tradition weak acid technology (weak base-weak acid-weak base) is used strong acid (pH 1.7～2.0) technology (strong acid-weak acid-weak base) glue instead.To reactant under the strong acid condition to mole highstrung characteristics of the residence time when; The custom that discarded common urea feeds intake fast; The working method that proposition evenly added in 7～12 minutes; The gelling phenomenon appears to avoid the too fast local molar ratio that causes of urea adding low excessively, can not cross causing overstand slowly.Temperature, pH value, feed rate, reinforced time and mol ratio that the strong acid stage must grasp are proposed simultaneously; According to these concrete operations step and precise information; Need not to add stopper and also need not hang down temperature control; Also can control reaction safely and reliably, obtain to improve the urea-formaldehyde resin (containing the Uron ring) of structure.Certainly reaction kettle varies in size, and feeding quantity and reinforced time also need corresponding adjustment, but finally with the temperature that adds material at 81～85 ℃ and do not produce the gelling phenomenon and be as the criterion.Then, under weak acid-weak base condition,, can strengthen the physical and mechanical property of urea-formaldehyde resin adhesive again, thereby use modified urea-formaldehyde resin adhesive with the preferable concrete form of less trimeric cyanamide obtained performance with cyanurotriamide modified, specifically:
After first urea feeds intake and finishes, add alkali immediately and make the reactant disengaging strong acid stage and get into weak acid stage.Still exist a large amount of free formaldehydes in the reaction mass this moment.Thereby must add second batch of urea, and the mol ratio of control formaldehyde and urea is to guarantee resin quality.Because the existing water-fast effect that improves intensity that has again of trimeric cyanamide makes it at weak acid and near participating in reaction under the neutrallty condition so drop into trimeric cyanamide, generate cyanurotriamide modified urea-formaldehyde resin (MUF) simultaneously.After first terminal point arrives, add alkali and make reactant get into the weak base stage, and add second batch of trimeric cyanamide, add the 3rd batch of urea again behind the stirring certain hour, they are reacted under the weak base condition, thereby play the effect of urea-formaldehyde resin being carried out further modification.
In addition, working method of the present invention has two simple and clear, maneuverable terminal point controlling index (promptly splash into reactant respectively white cloud and mist whether to occur in 30 ℃ and 55～65 ℃ of water be sign), with the convenient process of controlling.
Embodiment
Embodiment 1
1, prescription is formed
The mol ratio of formaldehyde and urea is F/U=2.04,530 parts in formaldehyde (concentration 37%), 197 parts in urea (purity 98%), 65 parts of trimeric cyanamides, 1.4 parts of Z 150PH, 1 part of vulkacit H, 2 parts of Dyhard RU 100s.
2, adhesive-preparing technology
< 1>with in 530 parts of formalins and 1.4 parts of input reaction kettles of Z 150PH, agitator, the beginning heat temperature raising stops heating when being warmed up to 38～40 ℃, and when temperature inertia increased to 48 ℃, the salt acid for adjusting pH value of use 31～36% was 1.7～2.0;
When < 2>temperature increases to 51 ℃, evenly add 140 parts in first urea in 7～10 minutes, temperature is raised to 83～85 ℃;
< 3>using 25～30% aqueous sodium hydroxide solutions to regulate pH immediately is 5.8～6.2;, temperature adds 35 parts in second batch of urea when being 83～85 ℃ equably; Stir after 10 minutes and to add 25 parts of trimeric cyanamides and 1 part of vulkacit H, checking and adjust reactant pH is 6.8～7.2, uses muddy some method to observe; Reactant is splashed in 30 ℃ of water, and the cloud that is white in color is first terminal point;
< 4>reach first terminal point after, adding 25～30% aqueous sodium hydroxide solutions, to regulate pH be 7.5～8.5, adds 2 parts of 40 parts of trimeric cyanamides and Dyhard RU 100s, temperature is controlled at 82 ± 1 ℃, stirs 20 minutes;
< 5>add 22 parts in the 3rd batch of urea, be allowed to condition at and carry out polycondensation (reactant is splashed in 55～65 ℃ of water, and the cloud that is white in color is second terminal point) under 78 ± 2 ℃;
< 6>reach and begin cooling behind second terminal point, when temperature was reduced to 35～45 ℃, adding 25～30% aqueous sodium hydroxide solution, to regulate pH be 7.5～8.0 back dischargings.
3, the quality of glue (seeing table 1)
The quality condition of table 1 embodiment 1 glue
4, making sheet effect
< 1>mask-making technology significant parameter
Nine layers of Eucalyptus veneer, the thick 1.5～1.8mm of veneer, water ratio≤14%, tackiness agent add 10% wheat-flour, do not add solidifying agent, resin added 200～250g/m
2
Hot pressing temperature=105～110 ℃, hot pressing time=1.2～1.5min/mm.
< 2>concrete form quality (thickness of slab 15mm sees table 2)
The quality condition of table 2 embodiment 1 concrete form
Embodiment 2
1, prescription is formed
The mol ratio of formaldehyde and urea is F/U=1.82,590 parts in formaldehyde (concentration 37%), 245 parts in urea (purity 98%), 75 parts of trimeric cyanamides, 1.5 parts of Z 150PH, 1 part of vulkacit H, 2 parts of Dyhard RU 100s;
2, adhesive-preparing technology
< 1>with in 590 parts of formalins and 1.5 parts of input reaction kettles of Z 150PH, agitator, the beginning heat temperature raising stops heating when being warmed up to 38～40 ℃, and when temperature inertia increased to 48 ℃, the salt acid for adjusting pH value of use 31～36% was 1.7～2.0;
When < 2>temperature increases to 51 ℃, evenly add 156 parts in first urea in 7～10 minutes, temperature is raised to 81～85 ℃.
< 3>using 25～30% aqueous sodium hydroxide solutions to regulate pH immediately is 5.5～6.0;, temperature adds 38 parts in second batch of urea when being 83～85 ℃ equably; Stir after 10 minutes and to add 30 parts of trimeric cyanamides and 1 part of vulkacit H, checking and adjust reactant pH is 6.8～7.2, uses muddy some method to observe; Reactant is splashed in 30 ℃ of water, and the cloud that is white in color is first terminal point;
< 4>reach first terminal point after, adding 25～30% aqueous sodium hydroxide solutions, to regulate pH be 7.5～8.5, adds 2 parts of 45 parts of trimeric cyanamides and Dyhard RU 100s, temperature is controlled at 82 ± 1 ℃, stirs 20 minutes;
< 5>add 51 parts in the 3rd batch of urea, be allowed to condition at and carry out polycondensation under 78 ± 2 ℃ (reactant is splashed in 55～65 ℃ of water, and the cloud and mist that is white in color is second terminal point;
< 6>reach and begin cooling behind second terminal point, when temperature was reduced to 35～45 ℃, adding 25～30% aqueous sodium hydroxide solution, to regulate pH be 7.5～8.0 back dischargings.
3, the quality of glue (seeing table 3)
The quality condition of table 3 embodiment 2 glue
4, making sheet effect
< 1>mask-making technology significant parameter
Nine layers of Eucalyptus veneer, the thick 1.5～1.8mm of veneer, water ratio≤14%, tackiness agent add 10% wheat-flour, do not add solidifying agent, resin added 200～250g/m
2
Hot pressing temperature=105～110 ℃, hot pressing time=1.2～1.5min/mm.
< 2>concrete form quality (thickness of slab 15mm sees table 4)
The quality condition of table 4 embodiment 2 concrete forms
Embodiment 3
1, prescription is formed
The mol ratio of formaldehyde and urea is F/U=2.107,1200 parts in formaldehyde (concentration 37%), 430 parts in urea (purity 98%), 115 parts of trimeric cyanamides, 3 parts of Z 150PH, 2 parts of vulkacit Hs, 4 parts of Dyhard RU 100s;
2, adhesive-preparing technology
< 1>with in 1200 parts of formalins and 3 parts of input reaction kettles of Z 150PH, agitator, the beginning heat temperature raising stops heating when being warmed up to 37～38 ℃, and when temperature inertia increased to 47 ℃, the salt acid for adjusting pH value of use 30～36% was 1.7～2.0;
When < 2>temperature increases to 51 ℃, evenly add 312 parts in first urea in 10～12 minutes, temperature is raised to 83～85 ℃.
< 3>using 25～30% aqueous sodium hydroxide solutions to regulate pH immediately is 5.5～6.0;, temperature adds 76 parts in second batch of urea when being 83～85 ℃ equably; Stir after 10 minutes and to add 40 parts of trimeric cyanamides and 2 parts of vulkacit Hs, checking and adjust reactant pH is 6.8～7.2, uses muddy some method to observe; Reactant is splashed in 30 ℃ of water, and the cloud that is white in color is first terminal point;
< 4>reach first terminal point after, adding 25～30% aqueous sodium hydroxide solutions, to regulate pH be 7.5～8.5, adds 4 parts of 75 parts of trimeric cyanamides and Dyhard RU 100s, temperature is controlled at 82 ± 1 ℃, stirs 20 minutes;
< 5>add 42 parts in the 3rd batch of urea, be allowed to condition at and carry out polycondensation under 78 ± 2 ℃ (reactant is splashed in 55～65 ℃ of water, and the cloud and mist that is white in color is second terminal point;
< 6>reach and begin cooling behind second terminal point, when temperature was reduced to 35～45 ℃, adding 25～30% aqueous sodium hydroxide solution, to regulate pH be 7.5～8.0 back dischargings.
3, the quality of glue (seeing table 5)
The quality condition of table 5 embodiment 3 glue
4, making sheet effect
< 1>mask-making technology significant parameter
Nine layers of Eucalyptus veneer, the thick 1.5～1.8mm of veneer, water ratio≤14%, tackiness agent add 10% wheat-flour, do not add solidifying agent, resin added 200～250g/m
2
Hot pressing temperature=105～110 ℃, hot pressing time=1.2～1.5min/mm.
< 2>concrete form quality (thickness of slab 15mm sees table 6)
The quality condition of table 6 embodiment 3 concrete forms
Claims (4)
1. a concrete form is used modified urea-formaldehyde resin adhesive, it is characterized in that mainly being processed by the raw material of following parts by weight: 20～30 parts in the urea of 50～60 parts in the formaldehyde of mass concentration 37%, purity 98%, 6～8 parts of trimeric cyanamides, 0.1～0.2 part of tackifier, 0.2～0.3 part of promotor.
2. concrete form according to claim 1 is used modified urea-formaldehyde resin adhesive, it is characterized in that: said tackifier are Z 150PH; Said promotor is vulkacit H, Dyhard RU 100 or both mixtures.
3. concrete form according to claim 1 and 2 is used modified urea-formaldehyde resin adhesive, it is characterized in that: said raw material also comprises an amount of sodium hydroxide and hydrochloric acid.
4. concrete form according to claim 3 is characterized in that with the working method of modified urea-formaldehyde resin adhesive this method may further comprise the steps:
< 1>formaldehyde and Z 150PH are dropped in the reaction kettle, agitator, the beginning heat temperature raising, temperature-stable adds mass concentration 30～36% in the time of 47～48 ℃ salt acid for adjusting pH value is 1.7～2.0;
<2>Temperature-stable added first urea equably in 7～12 minutes in the time of 51～53 ℃, it is F/U that its amount should make the mol ratio of reinforced back formaldehyde and urea
1=2.8～3.0, temperature rises to 81～85 ℃;
<3>Using the aqueous sodium hydroxide solution adjusting pH of mass concentration 25～30% immediately is 5.5～6.2, when temperature is 81～85 ℃, adds second batch of urea equably, and it is F/U that its amount should make the mol ratio of formaldehyde and urea
1+2=2.1～2.3; Stir to add after 10 minutes and account for first trimeric cyanamide of total trimeric cyanamide amount 25～40% and first promotor that accounts for total promotion dosage 1/3; Checking and adjust reactant pH is 6.8～7.2; Use muddy some method observation reactant at water form, to be white in color vaporific in 30 ℃ of water be first terminal point when reactant drips to;
< 4>reach first terminal point after, it is 7.5～8.5 that the aqueous sodium hydroxide solution that adds mass concentration 25～30% is regulated pH, adds residue trimeric cyanamide and promotor, controlled temperature stirred 20 minutes at 82 ± 1 ℃;
< 5>add residue urea, 78 ± 2 ℃ of reactions down, uses muddy some method to observe reactant at water form, to be white in color vaporific in 55～65 ℃ of water be second terminal point when reactant drips to;
< 6>reach and begin cooling behind second terminal point, when temperature was reduced to 35～45 ℃, it was 7.5～8.0 back dischargings that the aqueous sodium hydroxide solution that adds mass concentration 25～30% is regulated pH.
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| CN105368356A (en) * | 2015-11-27 | 2016-03-02 | 广西大学 | Preparation method for modified urea-formaldehyde adhesive used for moisture-proof and environmentally friendly medium density fiberboard |
| CN105820783A (en) * | 2016-03-18 | 2016-08-03 | 扬州捷高新材料科技有限公司 | Industrial production method of urea-formaldehyde resin with ultralow release amount of formaldehyde |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157567A (en) * | 1984-12-28 | 1986-07-17 | Daicel Chem Ind Ltd | Adhesive for plywood |
| CN1670104A (en) * | 2005-03-02 | 2005-09-21 | 上海市建筑科学研究院有限公司 | Low-release aldehyde adhesive and its preparation method and use |
| CN101244571A (en) * | 2008-03-21 | 2008-08-20 | 中国林业科学研究院林产化学工业研究所 | Method for manufacturing E0 level wood veneer |
| CN101538355A (en) * | 2009-04-20 | 2009-09-23 | 扬州市吉隆化工有限公司 | Industrialized production method of urea-formaldehyde resin |
-
2011
- 2011-07-18 CN CN 201110200595 patent/CN102391805B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157567A (en) * | 1984-12-28 | 1986-07-17 | Daicel Chem Ind Ltd | Adhesive for plywood |
| CN1670104A (en) * | 2005-03-02 | 2005-09-21 | 上海市建筑科学研究院有限公司 | Low-release aldehyde adhesive and its preparation method and use |
| CN101244571A (en) * | 2008-03-21 | 2008-08-20 | 中国林业科学研究院林产化学工业研究所 | Method for manufacturing E0 level wood veneer |
| CN101538355A (en) * | 2009-04-20 | 2009-09-23 | 扬州市吉隆化工有限公司 | Industrialized production method of urea-formaldehyde resin |
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