CN102115652A - Sucrose-melamine-formaldehyde (SMF) copolycondensation resin wood adhesive and preparation method thereof - Google Patents
Sucrose-melamine-formaldehyde (SMF) copolycondensation resin wood adhesive and preparation method thereof Download PDFInfo
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- CN102115652A CN102115652A CN2010106179801A CN201010617980A CN102115652A CN 102115652 A CN102115652 A CN 102115652A CN 2010106179801 A CN2010106179801 A CN 2010106179801A CN 201010617980 A CN201010617980 A CN 201010617980A CN 102115652 A CN102115652 A CN 102115652A
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Abstract
The invention discloses a sucrose-melamine-formaldehyde (SMF) copolycondensation resin wood adhesive and a preparation method thereof. The adhesive is mainly obtained by performing copolycondensation on sucrose, melamine and formaldehyde, wherein the molar ratio of the sucrose to the melamine is (0.4-0.7):1; the adhesive is yellowish or golden brown liquid with the solid content between 46 percent and 50 percent, the pH between 8.5 and 9.0 and the shelf life between 30 and 60 days. The adhesive is obtained by modifying melamine-formaldehyde (MF) resin with sucrose. The adhesive is mainly prepared by introducing the sucrose into a copolymerization system at a high volume through a single medium. By adopting the method, copolycondensation of a sucrose-melamine-formaldehyde ternary system is effectively realized, the synthesized SMF has similar performance with pure MF, lower cost and longer shelf life, can substitute the current widely applied MF resin wood adhesive and is suitable for the production technology of various artificial boards.
Description
Technical field
The present invention relates to the melamine-formaldehyde resin adhesive stick of modification, especially relate to a kind of sucrose-carbamide condensation copolymerization resin wood adhesive and preparation method thereof.
Background technology
Though terpolycyantoamino-formaldehyde resin (melamine-formaldehyde resin, abbreviation MF) thermotolerance and the water tolerance of tackiness agent all are higher than urea-formaldehyde resin adhesive, and it is suitable with synvaren, price is also low slightly than the latter, but, because trimeric cyanamide costs an arm and a leg, thereby produce the cost height of melamine-formaldehyde resin adhesive stick, there is crisp, the easy defective such as break of glue-line short, after solidifying storage period in such tackiness agent simultaneously.Therefore,, reduce production costs, improve physical and chemical performance, improve its stability, become the adhesive industry problem demanding prompt solution how by MF is carried out modification.
He Naiye etc. (properties-correcting agent is to low pressure short period terpolycyantoamino-formaldehyde resin Effect on Performance. Chinese tackiness agent .2009,18 (5): 21-24) once with the properties-correcting agent of industrial sucrose as low pressure short period terpolycyantoamino-formaldehyde resin, the gained resin solid content is low, the polycondensation time short, and sucrose low price, renewable, reduced production cost greatly.In addition, sucrose contains the stability increase storage period that 8 hydroxyls can improve resin, reduces its fragility.Yet industrial sucrose modification MF reacts violent, wayward in the research, and resin is still shorter relatively storage period, only has 7～9 days.
Summary of the invention
The technical problem to be solved in the present invention provides sucrose-carbamide condensation copolymerization resin wood adhesive that a kind of storage period is long, production cost is lower and preparation method thereof.
Adopt following technical scheme for solving the problems of the technologies described above the present invention: sucrose-carbamide condensation copolymerization resin wood adhesive, mainly form by sucrose, trimeric cyanamide and formaldehyde condensation copolymerization, the mol ratio of sucrose and trimeric cyanamide is 0.4～0.7: 1; This tackiness agent is yellowish or golden yellow liquid, and solids content is 46～50%, and pH is 8.5～9.0, and be 30～60 days storage period.
The preparation method of above-mentioned tackiness agent comprises the steps:
(1) getting 220 weight part massfractions is 37% formalin, regulate pH to 8.5～9.0 with sodium hydroxide solution, the borax that stirs adding 0.25～0.33% down is as linking agent, react adding 126 weight part trimeric cyanamides, 137～240 weight part sucrose after 5～15 minutes, be warmed up to 88～98 ℃ gradually;
(2) in insulation reaction under this temperature after 30 minutes, thin up resin solid content to 46～50% when assaying reaction liquid water extent of dilution reaches 2～3 times is regulated pH to 8.5～9.0 postcooling blowings with sodium hydroxide solution, promptly.
The present invention adopts sucrose that terpolycyantoamino-formaldehyde resin is carried out modification and handles, and obtains a kind of sucrose-carbamide condensation copolymerization resin (sucrose-melamine-formaldehyde resin is called for short SMF) wood adhesive.Preparing this tackiness agent mainly is to introduce sucrose in copolymerization system by single medium heavy body, realize the copolycondensation of sucrose, trimeric cyanamide and formaldehyde ternary system effectively, synthetic SMF is similar to pure MF performance, cost is lower, storage period is longer, alternative present widely used terpolycyantoamino-formaldehyde resin wood adhesive, and the production technique of suitable various wood-based plates.
Embodiment
Embodiment 1
(1) getting 220 weight part massfractions is 37% formalin, regulate pH to 8.5 with sodium hydroxide solution, the borax that stirs adding 0.25% down reacts adding 126 weight part trimeric cyanamides, 137 weight part sucrose after 5 minutes as linking agent, is warmed up to 88～96 ℃ gradually;
(2) in insulation reaction under this temperature after 30 minutes, thin up resin solid content to 46～48% when assaying reaction liquid water extent of dilution reaches 2 times, regulate pH to 8.5 postcooling blowing with sodium hydroxide solution, promptly get sucrose-carbamide condensation copolymerization resin wood adhesive.
In the preparation of this example, the mol ratio of sucrose and trimeric cyanamide is 0.4: 1; The gained tackiness agent is golden yellow liquid, and solids content is 46～48%, and pH is 8.5, and be 30～60 days storage period.
Embodiment 2
(1) getting 220 weight part massfractions is 37% formalin, regulate pH to 8.5 with sodium hydroxide solution, the borax that stirs adding 0.30% down reacts adding 126 weight part trimeric cyanamides, 188 weight part sucrose after 10 minutes as linking agent, is warmed up to 90～98 ℃ gradually;
(2) in insulation reaction under this temperature after 30 minutes, thin up resin solid content to 47～49% when assaying reaction liquid water extent of dilution reaches 2.5 times, regulate pH to 8.5 postcooling blowing with sodium hydroxide solution, promptly get sucrose-carbamide condensation copolymerization resin wood adhesive.
In the preparation of this example, the mol ratio of sucrose and trimeric cyanamide is 0.55: 1; The gained tackiness agent is a weak yellow liquid, and solids content is 47～49%, and pH is 8.5, and be 30～50 days storage period.
Embodiment 3
(1) getting 220 weight part massfractions is 37% formalin, regulate pH to 9.0 with sodium hydroxide solution, the borax that stirs adding 0.33% down reacts adding 126 weight part trimeric cyanamides, 240 weight part sucrose after 15 minutes as linking agent, is warmed up to 90～98 ℃ gradually;
(2) in insulation reaction under this temperature after 30 minutes, thin up resin solid content to 48～50% when assaying reaction liquid water extent of dilution reaches 3 times, regulate pH to 9.0 postcooling blowing with sodium hydroxide solution, promptly get sucrose-carbamide condensation copolymerization resin wood adhesive.
In the preparation of this example, the mol ratio of sucrose and trimeric cyanamide is 0.7: 1; The gained tackiness agent is golden yellow liquid, and solids content is 48～50%, and pH is 9.0, and be 30～40 days storage period.
The embodiment of the invention 1 to 3 gained sucrose-carbamide condensation copolymerization resin (SMF) wood adhesive and commercially available terpolycyantoamino-formaldehyde resin (MF) adhesive products technical indicator are compared, as shown in table 1.
Table 1SMF wood adhesive and MF adhesive technology index comparison sheet
As seen, SMF wood adhesive of the present invention is similar to commercially available pure MF tackiness agent performance, but the curing situation is better, storage period is longer.
The bonding strength of glued board by I class glued board (〉=0.7MPa) detect, its detection method is boiled quick test method (result who records multiply by the bonding strength value of coefficient 0.9 as the examination and test of products) with reference to the 3h of regulation among standard GB/T9846.1～9846.8-2004 " glued board " and the GB/T 17657-1999 " Test methods of evaluating the properties of woodbased panels and surface decorated woodbased panels ".
Claims (2)
1. sucrose-carbamide condensation copolymerization resin wood adhesive is characterized in that this tackiness agent is mainly formed by sucrose, trimeric cyanamide and formaldehyde condensation copolymerization, and the mol ratio of described sucrose and trimeric cyanamide is 0.4～0.7: 1; This tackiness agent is yellowish or golden yellow liquid, and solids content is 46～50%, and pH is 8.5～9.0, and be 30～60 days storage period.
2. the preparation method of sucrose according to claim 1-carbamide condensation copolymerization resin wood adhesive is characterized in that this preparation method comprises the steps:
(1) getting 220 weight part massfractions is 37% formalin, regulate pH to 8.5～9.0 with sodium hydroxide solution, the borax that stirs adding 0.25～0.33% down is as linking agent, react adding 126 weight part trimeric cyanamides, 137～240 weight part sucrose after 5～15 minutes, be warmed up to 88～98 ℃ gradually;
(2) in insulation reaction under this temperature after 30 minutes, thin up resin solid content to 46～50% when assaying reaction liquid water extent of dilution reaches 2～3 times is regulated pH to 8.5～9.0 postcooling blowings with sodium hydroxide solution, promptly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010617980 CN102115652B (en) | 2010-12-31 | 2010-12-31 | Sucrose-melamine-formaldehyde (SMF) copolycondensation resin wood adhesive and preparation method thereof |
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| CN 201010617980 CN102115652B (en) | 2010-12-31 | 2010-12-31 | Sucrose-melamine-formaldehyde (SMF) copolycondensation resin wood adhesive and preparation method thereof |
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| CN102115652A true CN102115652A (en) | 2011-07-06 |
| CN102115652B CN102115652B (en) | 2013-04-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074016A (en) * | 2013-01-25 | 2013-05-01 | 广西大学 | Sugarcane juice-melamine-formaldehyde resin adhesive and preparation method thereof |
| CN103666350A (en) * | 2013-12-11 | 2014-03-26 | 广西大学 | Maltose-melamine-formaldehyde copolycondensation resin wood adhesive and preparation method thereof |
| CN111909642A (en) * | 2020-08-13 | 2020-11-10 | 常州市贝美家居科技有限公司 | Melamine formaldehyde resin adhesive, calcium silicate composite floor and production process |
| CN112339049A (en) * | 2020-10-27 | 2021-02-09 | 阜南县明强柳编工艺品有限公司 | Treatment method for improving grain strength of willow board |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517023A (en) * | 2006-09-18 | 2009-08-26 | Pq硅石英国有限公司 | Compositions and methods for resin-based wood glues |
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2010
- 2010-12-31 CN CN 201010617980 patent/CN102115652B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517023A (en) * | 2006-09-18 | 2009-08-26 | Pq硅石英国有限公司 | Compositions and methods for resin-based wood glues |
Non-Patent Citations (2)
| Title |
|---|
| 张立芳: "《合成树脂饰面人造板》", 31 March 2004, 化学工业出版社 * |
| 陈栓虎等: "果糖三聚氰胺树脂胶粘剂的合成", 《粘结》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074016A (en) * | 2013-01-25 | 2013-05-01 | 广西大学 | Sugarcane juice-melamine-formaldehyde resin adhesive and preparation method thereof |
| CN103666350A (en) * | 2013-12-11 | 2014-03-26 | 广西大学 | Maltose-melamine-formaldehyde copolycondensation resin wood adhesive and preparation method thereof |
| CN103666350B (en) * | 2013-12-11 | 2016-04-20 | 广西大学 | Maltose-carbamide condensation copolymerization resin wood adhesive and preparation method thereof |
| CN111909642A (en) * | 2020-08-13 | 2020-11-10 | 常州市贝美家居科技有限公司 | Melamine formaldehyde resin adhesive, calcium silicate composite floor and production process |
| CN112339049A (en) * | 2020-10-27 | 2021-02-09 | 阜南县明强柳编工艺品有限公司 | Treatment method for improving grain strength of willow board |
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