CN101698786A - Adhesive for orienting shaving board and production method thereof - Google Patents

Adhesive for orienting shaving board and production method thereof Download PDF

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Publication number
CN101698786A
CN101698786A CN200910229672A CN200910229672A CN101698786A CN 101698786 A CN101698786 A CN 101698786A CN 200910229672 A CN200910229672 A CN 200910229672A CN 200910229672 A CN200910229672 A CN 200910229672A CN 101698786 A CN101698786 A CN 101698786A
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China
Prior art keywords
formaldehyde
adhesive
urea
total weight
weight parts
Prior art date
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Pending
Application number
CN200910229672A
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Chinese (zh)
Inventor
卞杰
卞豹
曹洪旭
袁新军
刘新红
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QUFU HUIDI CHEMICALS CO Ltd
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QUFU HUIDI CHEMICALS CO Ltd
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Priority to CN200910229672A priority Critical patent/CN101698786A/en
Publication of CN101698786A publication Critical patent/CN101698786A/en
Pending legal-status Critical Current

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Abstract

The invention provides adhesive for orienting a shaving board, which adopts formaldehyde and urea as main raw materials, and performs a condensation polymerization reaction to synthesize a macromoleclar polymer under the action of catalyst. The adhesive comprises the following raw materials in parts by weight: 1,200 to 1,300 parts of formaldehyde, 600 to 800 parts of urea, 250 to 350 parts of melamine, 2 to 8 parts of polyving akohol, 50 to 150 parts of water, and 8 to 12 parts of formaldehyde scavenger. In the production process, the formaldehyde and the urea are raw materials of the condensation polymerization reaction of a main body, the polyvinyl alcohol reacts with the formaldehyde to improve the initial viscosity, improve the flexibility and avoid cracking. The melamine reacts with the formaldehyde, and is grafted with carboxaldehyde radicals to play a role of capturing the formaldehyde, and the whole reaction is performed under a stirring state in a reaction kettle at normal pressure. The adhesive has the advantages of low toxicity, environmental protection and low price; when the adhesive is applied to the production of the shaving board, the adhesion strength is high, the releasing amount of the formaldehyde is low, the content of free formaldehyde is less than 0.1 percent, and the veneer has good stability and cannot be easily deformed.

Description

A kind of adhesive for orienting shaving board and production method thereof
Technical field
The present invention relates to a kind of field of fine chemical, be specially a kind of adhesive for orienting shaving board 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 development trend brisk for supply and demand appears in oriented wood chipboard processing at home.Yet the common urea-formaldehyde resin adhesive series tackiness agent that domestic oriented wood chipboard production is adopted always makes the oriented wood chipboard production of production still have phenomenons such as moistureproof water resisting property is poor, intensity is low, free formaldehyde content exceeds standard.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of adhesive for orienting shaving board and production method thereof are provided, tackiness agent is more suitable for oriented wood chipboard production, makes the moistureproof water resisting property enhancing of shaving board, intensity height, free formaldehyde content reduce advantages such as environmental protection.
For achieving the above object, the technical solution adopted in the present invention is: a kind of adhesive for orienting shaving board, adopting formaldehyde, urea is main raw material, and polycondensation synthetic high molecular polymer takes place under the effect of catalyzer, it is characterized in that raw material also comprises polyvinyl alcohol, trimeric cyanamide, raw materials used weight part ratio is: formaldehyde 1200-1300, urea 600-800, trimeric cyanamide 250-350, polyvinyl alcohol 2-8, water 50-150, formaldehyde-trapping agent 8-12.
The best proportioning of raw materials used weight part is: formaldehyde 1240, urea 683, trimeric cyanamide 286, polyvinyl alcohol 6, water 100, formaldehyde-trapping agent 10.
The model of described polyvinyl alcohol is the 17-99 type.
Described formaldehyde-trapping agent is that produce in Hebei, and model is EH-3A.
In the composition of raw materials, formaldehyde and urea are main body polycondensation raw material, 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.
Above-mentioned adhesive for orienting shaving board production method, production process is: the formaldehyde of squeezing into earlier total weight parts in reactor, water, regulate pH value to 8.0-9.5, add the total weight parts polyvinyl alcohol again and be warmed up to 30-50 ℃, the 5-10% that adds the trimeric cyanamide total weight parts again, the 60-70% of urea total weight parts, slowly be warmed up to 95-100 ℃, be incubated 10-15 minute, the re-adjustment pH value is to 5.2-5.4, controlled temperature is to 85-95 ℃ then, survey colloid viscosity with being coated with-4 glasss of heat, when viscosity reaches 17S-20S, add the trimeric cyanamide of total weight parts formaldehyde-trapping agent and residuals weight part, insulation is 20-40 minute between temperature control 75-85 ℃, the urea that adds residuals weight part again, insulation is 10-30 minute between temperature control 70-80 ℃, vacuumizes then 20-30 minute, cool at last below 50 ℃, transfer pH value to 8.0-9.0, blowing goes out finished product glue, and entire reaction course is carried out under the normal-pressure reaction kettle whipped state.
More specifically explain above-mentioned production process: the formaldehyde of in reactor, squeezing into earlier total weight parts, water, add sodium hydroxide solution and regulate pH value to 8.5, add the total weight parts polyvinyl alcohol again and be warmed up to 40 ℃, add 7.5% of trimeric cyanamide total weight parts again, 65% of urea total weight parts, slowly be warmed up to 98 ℃, be incubated 10 minutes, regulate pH value to 5.2-5.4 with formic acid solution again, controlled temperature to 90 ℃ then, survey colloid viscosity with being coated with-4 glasss of heat, when viscosity arrives 17S-20S, the trimeric cyanamide that adds total weight parts formaldehyde-trapping agent EH-3A and residuals weight part, temperature control to 80 ℃ insulation 20-40 minute, the urea that adds residuals weight part again, 70 ℃ of insulations of temperature control 10-30 minute, vacuumized then 20-30 minute, and cooled at last below 50 ℃, transfer pH value to 8.0-9.0, blowing goes out finished product glue, and entire reaction course is carried out under the normal-pressure reaction kettle whipped state.
The invention has the beneficial effects as follows that this product has low toxicity, environmental protection, cheap advantage, is applied to shaving board production bonding strength height, burst size of methanal is low, free formaldehyde content<0.1%, glued board good stability, not yielding, cracking.
The product correlation technique index of oriented wood chipboard (OSB special adhesive) MUF-01A that employing the technology of the present invention is produced is as follows:
Product look shape: oyster white thick liquid, viscosity (25 ℃ are coated with one 4 glasss): 20-40S;
Solids content: 〉=52% (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: 7.0-9.0 (pH value precision test paper);
Curing speed: 〉=100S (100 ℃);
Store limit: 10d (5 ℃-25 ℃).
Embodiment
Most preferred embodiment: a kind of adhesive for orienting shaving board, the best proportioning of raw materials used weight part is: formaldehyde 1240, urea 683, trimeric cyanamide 286, polyvinyl alcohol 6, water 100, formaldehyde-trapping agent EH-3A 10.
Optimised process is: the formaldehyde of squeezing into earlier total weight parts in reactor, water, add sodium hydroxide solution and regulate pH value to 8.5, add the total weight parts polyvinyl alcohol again and be warmed up to 40 ℃, add 7.5% of trimeric cyanamide total weight parts again, 65% of urea total weight parts, slowly be warmed up to 98 ℃, be incubated 10 minutes, regulate pH value to 5.2-5.4 with formic acid solution again, controlled temperature to 90 ℃ then, survey colloid viscosity with being coated with-4 glasss of hot methods, when viscosity arrives 17S-20S, the trimeric cyanamide that adds total weight parts formaldehyde-trapping agent EH-3A and residuals weight part, temperature control to 80 ℃ is incubated 20-40 minute, the urea that adds residuals weight part again, 70 ℃ of insulations of temperature control 10-30 minute vacuumized 20-30 minute then, cooled at last below 50 ℃, transfer pH value to go out finished product glue to the 8.0-9.0 blowing, entire reaction course is carried out under the normal-pressure reaction kettle whipped state.

Claims (6)

1. adhesive for orienting shaving board, adopting formaldehyde, urea is main raw material, polycondensation synthetic high molecular polymer takes place under the effect of catalyzer, it is characterized in that raw material also comprises polyvinyl alcohol, trimeric cyanamide, raw materials used weight part ratio is: formaldehyde 1200-1300, urea 600-800, trimeric cyanamide 250-350, polyvinyl alcohol 2-8, water 50-150, formaldehyde-trapping agent 8-12.
2. a kind of adhesive for orienting shaving board as claimed in claim 1 is characterized in that raw materials used weight part ratio is: formaldehyde 1240, urea 683, trimeric cyanamide 286, polyvinyl alcohol 6, water 100, formaldehyde-trapping agent 10.
3. a kind of adhesive for orienting shaving board as claimed in claim 1, the model that it is characterized in that described polyvinyl alcohol is the 17-99 type.
4. a kind of adhesive for orienting shaving board as claimed in claim 1 is characterized in that described formaldehyde-trapping agent is that produce in Hebei, and model is EH-3A.
5. a kind of adhesive for orienting shaving board production method as claimed in claim 1, it is characterized in that production process is: the formaldehyde of in reactor, squeezing into earlier total weight parts, water, regulate pH value to 8.0-9.5, add the total weight parts polyvinyl alcohol again and be warmed up to 30-50 ℃, the 5-10% that adds the trimeric cyanamide total weight parts again, the 60-70% of urea total weight parts, slowly be warmed up to 95-100 ℃, be incubated 10-15 minute, the re-adjustment pH value is to 5.2-5.4, controlled temperature is to 85-95 ℃ then, survey colloid viscosity with being coated with-4 glasss of heat, when viscosity reaches 17S-20S, add the trimeric cyanamide of total weight parts formaldehyde-trapping agent and residuals weight part, insulation is 20-40 minute between temperature control 75-85 ℃, the urea that adds residuals weight part again, insulation is 10-30 minute between temperature control 70-80 ℃, vacuumizes then 20-30 minute, cool at last below 50 ℃, transfer pH value to 8.0-9.0, blowing goes out finished product glue, and entire reaction course is carried out under the normal-pressure reaction kettle whipped state.
6. a kind of adhesive for orienting shaving board production method as claimed in claim 5, it is characterized in that in reactor, squeezing into earlier the formaldehyde of total weight parts, water, add sodium hydroxide solution and regulate pH value to 8.5, add the total weight parts polyvinyl alcohol again and be warmed up to 40 ℃, add 7.5% of trimeric cyanamide total weight parts again, 65% of urea total weight parts, slowly be warmed up to 98 ℃, be incubated 10 minutes, regulate pH value to 5.2-5.4 with formic acid solution again, controlled temperature to 90 ℃ then, survey colloid viscosity with being coated with-4 glasss of heat, when viscosity reaches 17S-20S, add the trimeric cyanamide of total weight parts formaldehyde-trapping agent EH-3A and residuals weight part, temperature control to 80 ℃ insulation 20-40 minute, the urea that adds residuals weight part again, 70 ℃ of insulations of temperature control 10-30 minute vacuumized 20-30 minute then, cool at last below 50 ℃, transfer pH value to 8.0-9.0, blowing goes out finished product glue, and entire reaction course is carried out under the normal-pressure reaction kettle whipped state.
CN200910229672A 2009-10-29 2009-10-29 Adhesive for orienting shaving board and production method thereof Pending CN101698786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910229672A CN101698786A (en) 2009-10-29 2009-10-29 Adhesive for orienting shaving board and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910229672A CN101698786A (en) 2009-10-29 2009-10-29 Adhesive for orienting shaving board and production method thereof

Publications (1)

Publication Number Publication Date
CN101698786A true CN101698786A (en) 2010-04-28

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104479601A (en) * 2014-10-29 2015-04-01 大亚人造板集团有限公司 High-moisture resistance urea-formaldehyde resin adhesive and preparation method thereof
CN105984185A (en) * 2015-02-03 2016-10-05 广西南宁绿园北林木业有限公司 Oriented strand board (OSB)
CN107083208A (en) * 2017-05-08 2017-08-22 贵港市鑫宏木业有限公司 The special viscose glue mixture of wood plywood
CN107984588A (en) * 2017-12-31 2018-05-04 寿光市鲁丽木业股份有限公司 The oriented wood chipboard and its production method of a kind of high-strength high-elasticity modulus
CN111978900A (en) * 2020-08-18 2020-11-24 山东千森木业集团有限公司 Production process of impregnating compound for plate production
CN115820178A (en) * 2022-12-20 2023-03-21 巴中建丰新材料有限公司 Glue for F4 star-grade shaving board, shaving board and preparation method of shaving board

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104479601A (en) * 2014-10-29 2015-04-01 大亚人造板集团有限公司 High-moisture resistance urea-formaldehyde resin adhesive and preparation method thereof
CN105984185A (en) * 2015-02-03 2016-10-05 广西南宁绿园北林木业有限公司 Oriented strand board (OSB)
CN107083208A (en) * 2017-05-08 2017-08-22 贵港市鑫宏木业有限公司 The special viscose glue mixture of wood plywood
CN107984588A (en) * 2017-12-31 2018-05-04 寿光市鲁丽木业股份有限公司 The oriented wood chipboard and its production method of a kind of high-strength high-elasticity modulus
CN111978900A (en) * 2020-08-18 2020-11-24 山东千森木业集团有限公司 Production process of impregnating compound for plate production
CN115820178A (en) * 2022-12-20 2023-03-21 巴中建丰新材料有限公司 Glue for F4 star-grade shaving board, shaving board and preparation method of shaving board

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Application publication date: 20100428