CN112063343A - High-performance resin-based adhesive and preparation method thereof - Google Patents
High-performance resin-based adhesive and preparation method thereof Download PDFInfo
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- CN112063343A CN112063343A CN202010999960.9A CN202010999960A CN112063343A CN 112063343 A CN112063343 A CN 112063343A CN 202010999960 A CN202010999960 A CN 202010999960A CN 112063343 A CN112063343 A CN 112063343A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
- C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09J161/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic and acyclic or carbocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
A high-performance resin-based adhesive and a preparation method thereof relate to a resin-based adhesive and a preparation method thereof. The invention solves the problems of poor bonding performance and high free formaldehyde content of the existing urea-formaldehyde resin adhesive. The high-performance resin-based adhesive consists of urea-formaldehyde resin, a filler, an anti-aging agent and a modifier; the preparation method comprises the following steps: firstly, preparing urea-formaldehyde resin; secondly, preparing a modifier; and thirdly, preparing the adhesive. The invention is used for the high-performance resin-based adhesive and the preparation thereof.
Description
Technical Field
The invention relates to a resin-based adhesive and a preparation method thereof.
Background
The urea-formaldehyde resin adhesive has sufficient raw materials and low cost, is widely applied in social production and life, is an adhesive variety with the largest dosage, and particularly accounts for about 90 percent of the total dosage in the manufacturing of artificial boards in the wood processing industry. The urea-formaldehyde resin is prepared by condensation polymerization of urea and formaldehyde, has a high curing rate, and still has the defects of poor bonding performance, high free formaldehyde content and the like, so that environmental pollution is caused, and the human health is damaged.
Disclosure of Invention
The invention provides a high-performance resin-based adhesive and a preparation method thereof, aiming at solving the problems of poor bonding performance and high free formaldehyde content of the existing urea-formaldehyde resin adhesive.
A high-performance resin-based adhesive comprises, by mass, 70-90 parts of urea-formaldehyde resin, 8-15 parts of a filler, 3-6 parts of an anti-aging agent and 3-15 parts of a modifier;
the modifier consists of 1 to 10 parts of silicon dioxide particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate in parts by weight.
A preparation method of a high-performance resin-based adhesive is carried out according to the following steps:
firstly, preparing urea-formaldehyde resin:
weighing formaldehyde, urea and melamine, and dividing the urea into three batches according to the mass, wherein the first batch of urea accounts for 55 percent of the total amount of the urea, the second batch of urea accounts for 35 percent of the total amount of the urea, and the third batch of urea accounts for 10 percent of the total amount of the urea;
the molar ratio of the formaldehyde to the total amount of the urea is (1.2-1.0) to 1; the melamine accounts for 1-3% of the total mass of the urea;
secondly, adding formaldehyde into a four-neck flask, heating and stirring to 40-50 ℃, adjusting the pH to 8.5-9.0, adding a first batch of urea and melamine, heating to 85-90 ℃, and reacting for 40-60 min;
thirdly, adjusting the pH value to 5.0-5.5 by using an acid catalyst, adding a second batch of urea, preserving the temperature for 20-40 min, and observing the atomization phenomenon;
the acid catalyst is trifluoromethanesulfonic acid with the mass percentage of 10% -20%;
fourthly, when the atomization phenomenon occurs, adjusting the pH value to 8.5-9.0, adding a third batch of urea, and reacting for 20-40 min;
fifthly, adjusting the pH value to 7.5-8.0, cooling to room temperature, and discharging to obtain urea-formaldehyde resin;
secondly, preparing a modifier:
weighing 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate according to the mass parts, and then mixing the weighed 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate to obtain a modifier;
thirdly, preparing the adhesive:
weighing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier according to the mass parts, and then mixing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier to obtain the high-performance resin-based adhesive.
The invention has the beneficial effects that:
the high-performance resin-based adhesive prepared by the invention has excellent adhesive bonding strength, and the highest shearing strength can reach 2.13 MPa;
the formaldehyde emission of the plywood bonded by the high-performance resin-based adhesive prepared by the invention is lower than 0.12mg/L, the plywood can be directly applied indoors, the plywood is safe and environment-friendly, and the comprehensive performance is obviously improved.
The invention relates to a high-performance resin-based adhesive and a preparation method thereof.
Detailed Description
The first embodiment is as follows: the high-performance resin-based adhesive comprises, by mass, 70-90 parts of urea-formaldehyde resin, 8-15 parts of a filler, 3-6 parts of an anti-aging agent and 3-15 parts of a modifier;
the modifier consists of 1 to 10 parts of silicon dioxide particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate in parts by weight.
The beneficial effects of the embodiment are as follows:
the high-performance resin-based adhesive prepared by the embodiment has excellent bonding strength, and the highest shearing strength can reach 2.13 MPa;
the formaldehyde emission of the plywood bonded by the high-performance resin-based adhesive prepared by the embodiment is lower than 0.12mg/L, the plywood can be directly applied indoors, safety and environmental protection are realized, and the comprehensive performance is obviously improved.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the anti-aging agent is one or a mixture of two of calcium hydroxide and polyvinyl alcohol. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the filler is one or a mixture of more of calcium carbonate, kaolin and starch. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the embodiment provides a preparation method of a high-performance resin-based adhesive, which is carried out according to the following steps:
firstly, preparing urea-formaldehyde resin:
weighing formaldehyde, urea and melamine, and dividing the urea into three batches according to the mass, wherein the first batch of urea accounts for 55 percent of the total amount of the urea, the second batch of urea accounts for 35 percent of the total amount of the urea, and the third batch of urea accounts for 10 percent of the total amount of the urea;
the molar ratio of the formaldehyde to the total amount of the urea is (1.2-1.0) to 1; the melamine accounts for 1-3% of the total mass of the urea;
secondly, adding formaldehyde into a four-neck flask, heating and stirring to 40-50 ℃, adjusting the pH to 8.5-9.0, adding a first batch of urea and melamine, heating to 85-90 ℃, and reacting for 40-60 min;
thirdly, adjusting the pH value to 5.0-5.5 by using an acid catalyst, adding a second batch of urea, preserving the temperature for 20-40 min, and observing the atomization phenomenon;
the acid catalyst is trifluoromethanesulfonic acid with the mass percentage of 10% -20%;
fourthly, when the atomization phenomenon occurs, adjusting the pH value to 8.5-9.0, adding a third batch of urea, and reacting for 20-40 min;
fifthly, adjusting the pH value to 7.5-8.0, cooling to room temperature, and discharging to obtain urea-formaldehyde resin;
secondly, preparing a modifier:
weighing 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate according to the mass parts, and then mixing the weighed 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate to obtain a modifier;
thirdly, preparing the adhesive:
weighing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier according to the mass parts, and then mixing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier to obtain the high-performance resin-based adhesive.
The beneficial effects of the embodiment are as follows:
the high-performance resin-based adhesive prepared by the embodiment has excellent bonding strength, and the highest shearing strength can reach 2.13 MPa;
the formaldehyde emission of the plywood bonded by the high-performance resin-based adhesive prepared by the embodiment is lower than 0.12mg/L, the plywood can be directly applied indoors, safety and environmental protection are realized, and the comprehensive performance is obviously improved.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that: in the third step, the anti-aging agent is one or a mixture of two of calcium hydroxide and polyvinyl alcohol. The rest is the same as the fourth embodiment.
The sixth specific implementation mode: the present embodiment is different from the fourth or fifth embodiment in that: in the third step, the filler is one or a mixture of more of calcium carbonate, kaolin and starch. The other is the same as the fourth or fifth embodiment.
The seventh embodiment: this embodiment differs from one of the fourth to sixth embodiments in that: the molar ratio of the total amount of the formaldehyde and the urea in the first step is (1.2-1.0): 1; the melamine accounts for 1% -3% of the total mass of the urea in the first step. The others are the same as the fourth to sixth embodiments.
The specific implementation mode is eight: this embodiment is different from one of the fourth to seventh embodiments in that: adding formaldehyde into a four-neck flask, heating and stirring to 50 ℃, adjusting the pH value to 9.0, adding a first batch of urea and melamine, heating to 90 ℃, and reacting for 50 min. The rest is the same as the fourth to seventh embodiments.
The specific implementation method nine: this embodiment is different from the fourth to eighth embodiment in that: in the step one, the pH is adjusted to 5.0 by using an acid catalyst, a second batch of urea is added, the temperature is kept for 30min, and the atomization phenomenon is observed. The others are the same as the fourth to eighth embodiments.
The detailed implementation mode is ten: this embodiment is different from one of the fourth to ninth embodiments in that: in the first step, after the atomization phenomenon occurs, the pH value is adjusted to 9.0, and a third batch of urea is added for reaction for 30 min. The rest is the same as the fourth to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
the first embodiment is as follows:
a high-performance resin-based adhesive comprises, by mass, 80 parts of urea-formaldehyde resin, 10 parts of a filler, 4 parts of an anti-aging agent and 7 parts of a modifier;
the modifier consists of 8 parts of silicon dioxide particles, 3 parts of light calcium carbonate, 3 parts of titanium dioxide particles, 0.2 part of ferric chloride, 3 parts of polyethylene glycol and 0.4 part of sodium dodecyl sulfate in parts by weight;
the anti-aging agent is calcium hydroxide;
the filler is calcium carbonate;
a preparation method of a high-performance resin-based adhesive is carried out according to the following steps:
firstly, preparing urea-formaldehyde resin:
weighing formaldehyde, urea and melamine, and dividing the urea into three batches according to the mass, wherein the first batch of urea accounts for 55 percent of the total amount of the urea, the second batch of urea accounts for 35 percent of the total amount of the urea, and the third batch of urea accounts for 10 percent of the total amount of the urea;
the molar ratio of the formaldehyde to the total amount of the urea is 1.0: 1; the melamine accounts for 2 percent of the total mass of the urea;
adding formaldehyde into a four-neck flask, heating and stirring to 45 ℃, adjusting the pH to 9.0, adding a first batch of urea and melamine, heating to 90 ℃, and reacting for 50 min;
thirdly, adjusting the pH value to 5.0 by using an acid catalyst, adding a second batch of urea, keeping the temperature for 30min, and observing the atomization phenomenon;
the acid catalyst is trifluoromethanesulfonic acid with a mass percentage of 15%;
fourthly, when the atomization phenomenon occurs, adjusting the pH value to 9.0, adding a third batch of urea, and reacting for 30 min;
fifthly, adjusting the pH value to 8.0, cooling to room temperature, and discharging to obtain urea-formaldehyde resin;
secondly, preparing a modifier:
weighing 8 parts of silica particles, 3 parts of light calcium carbonate, 3 parts of titanium dioxide particles, 0.2 part of ferric chloride, 3 parts of polyethylene glycol and 0.4 part of sodium dodecyl sulfate according to the mass parts, and then mixing the weighed 8 parts of silica particles, 3 parts of light calcium carbonate, 3 parts of titanium dioxide particles, 0.2 part of ferric chloride, 3 parts of polyethylene glycol and 0.4 part of sodium dodecyl sulfate to obtain a modifier;
thirdly, preparing the adhesive:
weighing 80 parts of urea-formaldehyde resin, 10 parts of filler, 4 parts of anti-aging agent and 7 parts of modifier in parts by mass, and then mixing the weighed 80 parts of urea-formaldehyde resin, 10 parts of filler, 4 parts of anti-aging agent and 7 parts of modifier to obtain the high-performance resin-based adhesive.
Adhesive bond strength (expressed as shear strength) test: the method is characterized in that the method comprises the steps of measuring according to II-type plywood in GB/T17657-2013 standard, measuring by using a microcomputer-controlled electronic universal tester, and measuring by using a microcomputer-controlled electronic universal tester (the tensile rate is 50 mm/min; a test piece is soaked in water at 63 ℃ for 3 hours and then measured at 25 ℃), wherein the highest shear strength can reach 2.13 MPa.
The method for preparing the plywood by using the high-performance resin-based adhesive comprises the following steps:
1) preparing glue: uniformly mixing the high-performance resin-based adhesive and ammonium chloride in a weight ratio of 100: 1;
2) a Liuan veneer: the breadth is 100mm multiplied by 25mm multiplied by 1mm, the water content is 8 percent to 12 percent, and the double-side sizing amount is 360g/m2；
3) A hot-pressing curing process: the hot pressing temperature is 110 ℃, the hot pressing pressure is (1.0 +/-0.1) MPa, and the hot pressing time is 1 min/mm.
Testing formaldehyde emission of the plywood: according to the GB/T17657-2013 standard, an ultraviolet spectrophotometer is adopted for determination, and the determination result is 0.021 mg/L.
Claims (10)
1. A high-performance resin-based adhesive is characterized by comprising 70-90 parts by mass of urea-formaldehyde resin, 8-15 parts by mass of a filler, 3-6 parts by mass of an anti-aging agent and 3-15 parts by mass of a modifier;
the modifier consists of 1 to 10 parts of silicon dioxide particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate in parts by weight.
2. The high-performance resin-based adhesive according to claim 1, wherein the anti-aging agent is one or a mixture of calcium hydroxide and polyvinyl alcohol.
3. The high-performance resin-based adhesive according to claim 1, wherein the filler is one or a mixture of calcium carbonate, kaolin and starch.
4. The preparation method of the high-performance resin-based adhesive as claimed in claim 1, which is carried out according to the following steps:
firstly, preparing urea-formaldehyde resin:
weighing formaldehyde, urea and melamine, and dividing the urea into three batches according to the mass, wherein the first batch of urea accounts for 55 percent of the total amount of the urea, the second batch of urea accounts for 35 percent of the total amount of the urea, and the third batch of urea accounts for 10 percent of the total amount of the urea;
the molar ratio of the formaldehyde to the total amount of the urea is (1.2-1.0) to 1; the melamine accounts for 1-3% of the total mass of the urea;
secondly, adding formaldehyde into a four-neck flask, heating and stirring to 40-50 ℃, adjusting the pH to 8.5-9.0, adding a first batch of urea and melamine, heating to 85-90 ℃, and reacting for 40-60 min;
thirdly, adjusting the pH value to 5.0-5.5 by using an acid catalyst, adding a second batch of urea, preserving the temperature for 20-40 min, and observing the atomization phenomenon;
the acid catalyst is trifluoromethanesulfonic acid with the mass percentage of 10% -20%;
fourthly, when the atomization phenomenon occurs, adjusting the pH value to 8.5-9.0, adding a third batch of urea, and reacting for 20-40 min;
fifthly, adjusting the pH value to 7.5-8.0, cooling to room temperature, and discharging to obtain urea-formaldehyde resin;
secondly, preparing a modifier:
weighing 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate according to the mass parts, and then mixing the weighed 1 to 10 parts of silica particles, 1 to 10 parts of light calcium carbonate, 1 to 10 parts of titanium dioxide particles, 0.1 to 0.5 part of ferric chloride, 1 to 5 parts of polyethylene glycol and 0.1 to 0.5 part of sodium dodecyl sulfate to obtain a modifier;
thirdly, preparing the adhesive:
weighing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier according to the mass parts, and then mixing 70-90 parts of urea-formaldehyde resin, 8-15 parts of filler, 3-6 parts of anti-aging agent and 3-15 parts of modifier to obtain the high-performance resin-based adhesive.
5. The method for preparing a high-performance resin-based adhesive according to claim 4, wherein the anti-aging agent in step three is one or a mixture of two of calcium hydroxide and polyvinyl alcohol.
6. The method for preparing the high-performance resin-based adhesive according to claim 4, wherein the filler in the third step is one or a mixture of calcium carbonate, kaolin and starch.
7. The preparation method of the high-performance resin-based adhesive according to claim 4, wherein the molar ratio of the total amount of the formaldehyde and the urea in the first step (1.2-1.0) is 1; the melamine accounts for 1% -3% of the total mass of the urea in the first step.
8. The method for preparing the high-performance resin-based adhesive according to claim 4, wherein the first step of adding formaldehyde into a four-neck flask, heating and stirring to 50 ℃, adjusting the pH to 9.0, adding the first batch of urea and melamine, heating to 90 ℃, and reacting for 50 min.
9. The method for preparing a high performance resin based adhesive according to claim 4, wherein in the step one, pH is adjusted to 5.0 by acid catalyst, a second batch of urea is added, heat preservation is performed for 30min, and atomization is observed.
10. The method for preparing a high performance resin based adhesive according to claim 4, wherein in the first step, after the atomization phenomenon occurs, the pH is adjusted to 9.0, and a third batch of urea is added to react for 30 min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061413A (en) * | 2021-03-26 | 2021-07-02 | 广西南宁市完美木业有限公司 | Adhesive capable of prolonging service life of building template and preparation method thereof |
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| CN103540282A (en) * | 2013-09-16 | 2014-01-29 | 浙江农林大学 | Urea-formaldehyde resin wood adhesive modifier and applications thereof |
| CN104745128A (en) * | 2015-04-10 | 2015-07-01 | 徐伟鹏 | Urea resin adhesive and application thereof in plywood |
| CN107325243A (en) * | 2017-08-16 | 2017-11-07 | 常熟理工学院 | The preparation method of environment protection type urea formaldehyde resin |
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2020
- 2020-09-22 CN CN202010999960.9A patent/CN112063343A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540282A (en) * | 2013-09-16 | 2014-01-29 | 浙江农林大学 | Urea-formaldehyde resin wood adhesive modifier and applications thereof |
| CN104745128A (en) * | 2015-04-10 | 2015-07-01 | 徐伟鹏 | Urea resin adhesive and application thereof in plywood |
| CN107325243A (en) * | 2017-08-16 | 2017-11-07 | 常熟理工学院 | The preparation method of environment protection type urea formaldehyde resin |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113061413A (en) * | 2021-03-26 | 2021-07-02 | 广西南宁市完美木业有限公司 | Adhesive capable of prolonging service life of building template and preparation method thereof |
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Application publication date: 20201211 |