CN101709206A - Modified urea-formaldehyde resin glue and production method thereof - Google Patents
Modified urea-formaldehyde resin glue and production method thereof Download PDFInfo
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- CN101709206A CN101709206A CN200910229671A CN200910229671A CN101709206A CN 101709206 A CN101709206 A CN 101709206A CN 200910229671 A CN200910229671 A CN 200910229671A CN 200910229671 A CN200910229671 A CN 200910229671A CN 101709206 A CN101709206 A CN 101709206A
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- urea
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- polyvinyl alcohol
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Abstract
The invention relates to a modified urea-formaldehyde resin glue and a production method thereof. The modified urea-formaldehyde resin glue comprises the following raw materials in portions by weight: 1600-1800 portions of formaldehyde, 1000-1200 portions of urea, 80-120 portions of 18-20% ammonia water, 5-10 portions of polyvinyl alcohol, 80-120 portions of tripolycyanamide and 50-100 portions of deionized water. The production process comprises the following steps: respectively adding all the formaldehyde and the polyvinyl alcohol in a reaction kettle, and heating to 30-50 DEG C; adding all the ammonia water and the deionized water, and 50-65% of the urea after the polyvinyl alcohol is sufficiently dissolved; stopping heating after the temperature reaches 60-70 DEG C, leaving the materials to naturally heat up through reaction, and controlling the temperature below 100 DEG C; and when the viscosity reaches 15-20S measured by using a coating-400 test method, cooling and adding all the tripolycyanamide and the rest urea, cooling below 50 DEG C, and discharging the finished glue. When being used for producing veneer sheets, the glue has the advantages of quick precompaction molding, short production cycle, low content of free formaldehyde, high stability, environmental protection, low price and the like, and the veneer sheets are not easy to deform or crack.
Description
Technical field:
The invention belongs to chemical glue stick technical field, be specially a kind of modified urea-formaldehyde resin glue and production method thereof.
Background technology:
In recent years, along with progress of science and technology, domestic adhesives industry development is swift and violent day by day, and new building and finishing material are surging forward, and development trend brisk for supply and demand appears in glued board at home especially.At present the domestic production urea-formaldehyde glue generally all adopts this reaction principle of addition-polycondensation-addition, and this tackiness agent production cycle is long, free formaldehyde content is higher, the veneer squeeze time behind the gluing needs about 2 hours, has influenced client's productivity effect greatly.
Summary of the invention:
The objective of the invention is to overcome the prior art defective, produce a kind of modified urea-formaldehyde resin glue, this product has low toxicity, environmental protection, cheap, be used for plywood production bonding strength height, pre-molding is fast, with short production cycle, free formaldehyde content is low, good stability, do not ftracture, on-deformable characteristics.
The technical solution adopted in the present invention is: a kind of modified urea-formaldehyde resin glue, and raw materials used component and weight part ratio thereof are: formaldehyde 1600-1800, urea 1000-1200, the ammoniacal liquor 80-120 of concentration 18-20%, polyvinyl alcohol 5-10, trimeric cyanamide 80-120, deionized water 50-100.
Raw materials used component and weight part optimum proportion thereof are: formaldehyde 1650, urea 1075, the ammoniacal liquor 100 of concentration 18-20%, polyvinyl alcohol 6, trimeric cyanamide 100, deionized water 75.
Used polyvinyl alcohol model is commercially available model 17-99.
In the composition of raw materials, formaldehyde and urea are main body polycondensation raw material, and ammoniacal liquor mainly works to regulate pH value, and polyvinyl alcohol and formaldehyde reaction improve the initial viscosity of tackiness agent, and increase the snappiness after the adhesive applications, prevent cracking.Trimeric cyanamide can with formaldehyde reaction, the grafting carboxaldehyde radicals mainly is to participate in the later stage to catch the effect of formaldehyde.
The production method of above-mentioned a kind of modified urea-formaldehyde resin glue, production technique is as follows: add formaldehyde and the polyvinyl alcohol that gross weight is divided respectively in reactor, be warming up to 30-50 ℃, treat that polyvinyl alcohol fully dissolves the back and adds the ammoniacal liquor that gross weight is divided, the urea of deionized water and 55-65% total weight parts, be warmed up to 60-70 ℃ and stop heating, heat up by the reaction nature, and controlled temperature is no more than 100 ℃, when being coated with, employing begins cooling when-4 glasss of methods of testing record viscosity to 15S-20S, add the trimeric cyanamide of total weight parts and the urea of residuals weight part simultaneously, be cooled to below 50 ℃, blowing goes out finished product glue, and the entire reaction technological process is carried out under normal pressure.
The invention has the beneficial effects as follows that the modified urea-formaldehyde resin glue that uses the present invention to produce is used for plywood production, it is fast, with short production cycle to have a glued board pre-molding, and free formaldehyde content is low, good stability, not yielding and cracking, environmental protection, advantage such as cheap.
The correlation technique index of product of the present invention (urea-formaldehyde resin adhesive UF-01A technical indicator measured value) is as follows:
Product look shape: oyster white thick liquid, viscosity (25 ℃ are coated with one glass): 20-40S.Solids content: 〉=49% (get the 1-2g sample, 120 ℃ of constant temperature baking 2h carry out the analytical balance weighing);
From swimming formaldehyde :≤0.1% (sulfurous method reaches the GB/T14732-2006 related request);
Density: 1.2-1.22;
PH value: 6.0-7.0 (pH value precision test paper);
Curing speed: 〉=100S (100 ℃);
Store limit: 10d (5 ℃-25 ℃).
Embodiment
A kind of modified urea-formaldehyde resin glue UF-01A, raw materials used component and weight part optimum proportion thereof are: formaldehyde 1650, urea 1075, the ammoniacal liquor 100 of concentration 18-20%, commercially available model 17-99 polyvinyl alcohol 6, trimeric cyanamide 100, deionized water 75.
The production method of above-mentioned a kind of modified urea-formaldehyde resin glue UF-01A, production technique is as follows: add formaldehyde and the polyvinyl alcohol that gross weight is divided respectively in reactor, be warming up to 30-50 ℃, treat that polyvinyl alcohol fully dissolves the back and adds the ammoniacal liquor that gross weight is divided, the urea of deionized water and 55-65% total weight parts, be warmed up to 60-70 ℃, stop heating then, heat up by the reaction nature, and controlled temperature is no more than 100 ℃, begin cooling when-4 glasss of methods of testing record viscosity to 15S-20S when employing is coated with, add the trimeric cyanamide of total weight parts and the urea of residuals weight part simultaneously, be cooled to below 50 ℃, blowing goes out finished product glue, and the entire reaction technological process is carried out under normal pressure.
A: modified urea-formaldehyde resin glue process characteristic
In the resin that employing addition, condensation two elementary reaction traditional technologys are made, genes such as methylol key and secondary methyl ehter bond are more, so when being heating and curing, more because of the formaldehyde gas that hydrolysis discharges from resin, this is the one of the main reasons that causes the thermocompressor surrounding environment polluted by formaldehyde.
The urea-formaldehyde resin free formaldehyde of use explained hereafter of the present invention is low, the preheating moulding fast (veneer behind the gluing got final product pre-molding about 50 minutes at present, and common environmental protection glue squeeze time needs more than 2 hours).The production board burst size of methanal is low, the glue synthesis cycle short.Synopsis is as follows: (examination criteria GB/T14074-2006)
| Model | Batch | Viscosity (25 ℃) | Free aldehyde | PH value | Solids content | Synthesis cycle |
| Uf-01 (originally) | ??200907-70 | ??20S | ??0.18％ | ??7.3 | ??50.49％ | ??6h |
| Uf-01 (originally) | ??200907-103 | ??19S | ??0.20％ | ??7.8 | ??49.58％ | ??6h |
| ??Uf-01A | ??200907-69 | ??28S | ??0.07％ | ??6.5 | ??50.58％ | ??4h |
| ??Uf-01A | ??200907-104 | ??26S | ??0.05％ | ??6.2 | ??50.14％ | ??4h |
B: modified urea-formaldehyde resin glue using method
Use homogenizer, add urea-formaldehyde resin adhesive UF-01A glue, part filler, start stirrer and stir 10min, the back of waiting to stir adds the residue filler, stirs 15min, is modulated into required viscosity, and blowing uses.
C: recommend production technique
Two-sided resin added: 350-400g/m
2
Hot pressing temperature: 110-120 ℃
Hot pressing pressure: 8-12kg (is used for density of wood and is lower than 550kg/m
3)
12-16kg (is used for density of wood and is higher than 550kg/m
3).
Claims (5)
1. a modified urea-formaldehyde resin glue is characterized in that raw materials used component and weight part ratio thereof are: formaldehyde 1600-1800, urea 1000-1200, the ammoniacal liquor 80-120 of concentration 18-20%, polyvinyl alcohol 5-10, trimeric cyanamide 80-120, deionized water 50-100.
2. a kind of modified urea-formaldehyde resin glue as claimed in claim 1 is characterized in that raw materials used component and weight part optimum proportion thereof are: formaldehyde 1650, urea 1075, the ammoniacal liquor 100 of concentration 18-20%, polyvinyl alcohol 6, trimeric cyanamide 100, deionized water 75.
3. a kind of modified urea-formaldehyde resin glue as claimed in claim 1 is characterized in that used polyvinyl alcohol model is 17-99.
4. the production method of a kind of modified urea-formaldehyde resin glue as claimed in claim 1, it is characterized in that production technique is as follows: in reactor, add formaldehyde and the polyvinyl alcohol that gross weight is divided respectively, be warming up to 30-50 ℃, treat that polyvinyl alcohol fully dissolves the back and adds the ammoniacal liquor that gross weight is divided, the urea of deionized water and 55-65% total weight parts, be warmed up to 60-70 ℃ and stop heating, heat up by the reaction nature, and controlled temperature is no more than 100 ℃, when being coated with, employing begins cooling when-4 glasss of methods of testing record viscosity to 15S-20S, add the trimeric cyanamide of total weight parts and the urea of residuals weight part simultaneously, be cooled to below 50 ℃, blowing goes out finished product glue, and the entire reaction technological process is carried out under normal pressure.
5. the production method of a kind of modified urea-formaldehyde resin glue as claimed in claim 4, it is characterized in that production technique is as follows: in reactor, add formaldehyde and the polyvinyl alcohol that gross weight is divided respectively, be warming up to 40 ℃, treat that polyvinyl alcohol fully dissolves the back and adds the ammoniacal liquor that gross weight is divided, 63% of deionized water and urea total weight parts, be warmed up to 60-70 ℃, heat up by the reaction nature, and controlled temperature is no more than 100 ℃, when being coated with, employing begins cooling when-4 glasss of methods of testing record viscosity to 18S, add the trimeric cyanamide of total weight parts and the urea of residuals weight part simultaneously, be cooled to 45 ℃, blowing goes out finished product glue, and the entire reaction technological process is carried out under normal pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910229671A CN101709206A (en) | 2009-10-29 | 2009-10-29 | Modified urea-formaldehyde resin glue and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910229671A CN101709206A (en) | 2009-10-29 | 2009-10-29 | Modified urea-formaldehyde resin glue and production method thereof |
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| Publication Number | Publication Date |
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| CN101709206A true CN101709206A (en) | 2010-05-19 |
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| CN200910229671A Pending CN101709206A (en) | 2009-10-29 | 2009-10-29 | Modified urea-formaldehyde resin glue and production method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277114A (en) * | 2011-06-17 | 2011-12-14 | 江苏赛奥生化有限公司 | Preparation method of bacterial protein urea formaldehyde adhesive |
| CN102490217A (en) * | 2011-12-02 | 2012-06-13 | 朱江福 | Thin board veneering method for bamboo floor |
| CN102658572A (en) * | 2012-05-08 | 2012-09-12 | 河北爱美森木材加工有限公司 | Impregnation liquid for fast growing wood |
| CN102658573A (en) * | 2012-05-08 | 2012-09-12 | 河北爱美森木材加工有限公司 | Fast growing wood steeping liquor, method for preparing fast growing wood steeping liquor and method for steeping wood |
| CN103087661A (en) * | 2012-12-21 | 2013-05-08 | 淮南市金海达树脂有限责任公司 | Adhesive for bamboo and wood products and preparation method thereof |
| CN103805101A (en) * | 2013-12-31 | 2014-05-21 | 广西吉顺能源科技有限公司 | Low-formaldehyde high-strength adhesive and preparation method thereof |
| CN105273150A (en) * | 2015-12-07 | 2016-01-27 | 广西南宁德源胶粘剂有限公司 | Preparation method of urea resin used for biological plate base material |
| CN107686545A (en) * | 2017-10-17 | 2018-02-13 | 广东奕宏化工有限公司 | A kind of modified urea-formaldehyde resin and its preparation method and application |
-
2009
- 2009-10-29 CN CN200910229671A patent/CN101709206A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277114B (en) * | 2011-06-17 | 2013-03-13 | 江苏赛奥生化有限公司 | Preparation method of bacterial protein urea formaldehyde adhesive |
| CN102277114A (en) * | 2011-06-17 | 2011-12-14 | 江苏赛奥生化有限公司 | Preparation method of bacterial protein urea formaldehyde adhesive |
| CN102490217A (en) * | 2011-12-02 | 2012-06-13 | 朱江福 | Thin board veneering method for bamboo floor |
| CN102658572B (en) * | 2012-05-08 | 2014-05-28 | 河北爱美森木材加工有限公司 | Impregnation liquid for fast growing wood |
| CN102658572A (en) * | 2012-05-08 | 2012-09-12 | 河北爱美森木材加工有限公司 | Impregnation liquid for fast growing wood |
| CN102658573A (en) * | 2012-05-08 | 2012-09-12 | 河北爱美森木材加工有限公司 | Fast growing wood steeping liquor, method for preparing fast growing wood steeping liquor and method for steeping wood |
| CN102658573B (en) * | 2012-05-08 | 2014-07-30 | 河北爱美森木材加工有限公司 | Fast growing wood steeping liquor, method for preparing fast growing wood steeping liquor and method for steeping wood |
| CN103087661B (en) * | 2012-12-21 | 2014-11-12 | 淮南市金海达树脂有限责任公司 | Adhesive for bamboo and wood products and preparation method thereof |
| CN103087661A (en) * | 2012-12-21 | 2013-05-08 | 淮南市金海达树脂有限责任公司 | Adhesive for bamboo and wood products and preparation method thereof |
| CN103805101A (en) * | 2013-12-31 | 2014-05-21 | 广西吉顺能源科技有限公司 | Low-formaldehyde high-strength adhesive and preparation method thereof |
| CN105273150A (en) * | 2015-12-07 | 2016-01-27 | 广西南宁德源胶粘剂有限公司 | Preparation method of urea resin used for biological plate base material |
| CN105273150B (en) * | 2015-12-07 | 2017-09-29 | 广西南宁德源胶粘剂有限公司 | A kind of preparation method of ecological board base material Lauxite |
| CN107686545A (en) * | 2017-10-17 | 2018-02-13 | 广东奕宏化工有限公司 | A kind of modified urea-formaldehyde resin and its preparation method and application |
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Application publication date: 20100519 |