CN104513641A - Preparation method of low formaldehyde emission adhesive - Google Patents
Preparation method of low formaldehyde emission adhesive Download PDFInfo
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- CN104513641A CN104513641A CN201310679683.3A CN201310679683A CN104513641A CN 104513641 A CN104513641 A CN 104513641A CN 201310679683 A CN201310679683 A CN 201310679683A CN 104513641 A CN104513641 A CN 104513641A
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Abstract
The invention discloses a preparation method of a low formaldehyde emission adhesive, and relates to the technical filed of adhesives for artificial boards. The low formaldehyde emission adhesive comprises 10800 parts of formaldehyde, 8400 parts of urea, 175 parts of melamine and 75 parts of an assistant. Examination results show that the formaldehyde emission of the adhesive is 3-7mg/100g (0.1-0.3mg/L of a drier method), and the adhesion strength and the bending strength of the adhesive accord with national standards, so artificial boards made by using the adhesive disclosed in the invention have near zero harms to human bodies, and maintain the quality of indoor air good; the preparation method is simple; and the adhesive has good stability.
Description
Technical field
The present invention relates to adhesion agent for artificial board technical field, especially a kind of preparation method of low burst size of methanal tackiness agent.
Background technology
Tackiness agent and adhesive technology have demonstrated incomparable vigor and vitality, and its importance grows with each passing day, and practicality makes us belonging to order, applies increasingly extensive.At present, the tackiness agent of China is mainly main production raw material with formaldehyde, i.e. urea-formaldehyde resin adhesive, Phenol aldehyde resin and melamine-formaldehyde resin adhesive, its output account for that whole wood-based panel industry sticks with glue agent more than 90%, wherein, urea-formaldehyde resin adhesive due to low cost of manufacture, raw material be easy to get, bonding strength is high, color and luster is close to plurality of advantages such as timber, and being subject to the favor of most of artificial board enterprise, its consumption accounts for more than 85% of above-mentioned three kinds of tackiness agent total amounts.
Along with the raising of living standards of the people, living conditions improve, a large amount of woodworking article is applied to interior decoration, and urea-formaldehyde resin adhesive is in glue and sheeting process, and the wood-based plate to make with urea-formaldehyde resin adhesive is in life-time service process, can continue to discharge free formaldehyde in a large number, and this free formaldehyde could to be removed after 15 years; Therefore, very serious to the injury of the mankind, be also one of important sources of room air pollution; The worsening shortages of petroleum resources, and the continuous enhancing of people's environmental consciousness, human society must walk the road of Sustainable development, and therefore, the substitute finding traditional urea-formaldehyde resin adhesive has become the problem continuing to solve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of low burst size of methanal tackiness agent, and it can solve, and existing tackiness agent burst size of methanal is high, the problem of contaminate environment, infringement HUMAN HEALTH.
In order to solve the problem, technical scheme of the present invention is: the preparation method of this low burst size of methanal tackiness agent, comprises the raw material of following weight part:
10800 parts, formaldehyde; 8400 parts, urea; Trimeric cyanamide 175 parts; Auxiliary agent 75 parts;
Comprise the steps:
A. formaldehyde is added in reactor, add alkali and regulate pH value to 8.51 ~ 8.7; Add first urea and trimeric cyanamide, temperature is 30 DEG C ~ 35 DEG C, forms solution A; First urea accounts for 45.8% of total urea amount;
B. reaction at temperature slowly being risen to 89 DEG C ~ 90 DEG C by solution A in 40 minutes ~ 50 minutes, then adds acid and pH value is adjusted to 6.5, be incubated 32 minutes, obtain solution B;
When C. solution B being cooled to 88 DEG C, in solution B, acid adding regulates pH value to 5.3 ~ 5.4, and temperature is controlled to react at 89 DEG C ~ 90 DEG C; Beginning timing from acid adding, within 110 ~ 120 minutes, reaction end viscosity 21 seconds/30 DEG C ~ 22 seconds/30 DEG C, obtains solution C;
When D. solution C being cooled to 80 DEG C ~ 82 DEG C, in solution C, add auxiliary agent, and add alkali adjustment pH value to 7.1 ~ 7.3, then add second batch urea, react 20 minutes at 70 DEG C ~ 75 DEG C temperature, obtain solution D; Second batch urea accounts for 17.3% of total urea amount;
When E. solution D being cooled to 70 DEG C ~ 72 DEG C, add the 3rd batch of urea, keep temperature to be react 20 minutes at 63 DEG C ~ 65 DEG C, obtain solution E; 3rd batch of urea accounts for 20.2% of total urea amount;
When F. solution E being slowly cooled to 52 DEG C ~ 55 DEG C, adding alkali and regulate pH value to 7.1 ~ 7.3, then add the 4th batch of urea, keep being cooled to 40 DEG C after 10 minutes, then add alkali adjustment pH value to 7.5 ~ 8.0, put glue, can this tackiness agent be obtained.
In technique scheme, scheme can also be more specifically: described promotor comprises: described auxiliary agent comprises: trolamine 8 parts; Vulkacit H 9 parts; Polyvinyl alcohol 6 parts; Phthalic acid 10 parts, the raw material of weight part.
Owing to adopting technique scheme, the present invention has following beneficial effect:
Through inspection, tackiness agent burst size of methanal of the present invention is 3 mg/100g ~ 7mg/100g(condensed steam water 0.1 ~ 0.3mg/L), and bond strength and bending strength meet national standard, therefore, the artificial board obtained with this tackiness agent damages close to zero human body and IAQ (indoor air quality) is good, and preparation technology is simple, easily operates, to equipment of resin making without particular requirement; Raw material is common industrial chemicals, and wide material sources, easily buy, and do not limit by market; Obtained Adhensive performance is stablized, and free formaldehyde is low, detects free formaldehyde content be less than 0.05% through life-time service.
Embodiment
By embodiment, the present invention is described in further detail below:
Embodiment 1
The preparation method of this low burst size of methanal tackiness agent, comprises the raw material of following weight:
10800 kilograms, formaldehyde; 8400 kilograms, urea; Trimeric cyanamide 175 kilograms; Auxiliary agent 75 kilograms;
Comprise the steps:
A. formaldehyde is added in reactor, add alkali and regulate pH value to 8.51; Add first urea and trimeric cyanamide, temperature is 30 DEG C ~ 35 DEG C, forms solution A; First urea accounts for 45.8% of total urea amount;
B. reaction at temperature slowly being risen to 89 DEG C ~ 90 DEG C by solution A in 40 minutes, then adds acid and pH value is adjusted to 6.5, be incubated 32 minutes, obtain solution B;
When C. solution B being cooled to 88 DEG C, in solution B, acid adding regulates pH value to 5.3, and temperature is controlled to react at 89 DEG C ~ 90 DEG C; Beginning timing from acid adding, within 110 minutes, reaction end viscosity 21 seconds/30 DEG C, obtains solution C;
When D. solution C being cooled to 80 DEG C ~ 82 DEG C, in solution C, add auxiliary agent, and add alkali adjustment pH value to 7.1, then add second batch urea, react 20 minutes at 70 DEG C ~ 75 DEG C temperature, obtain solution D; Second batch urea accounts for 17.3% of total urea amount; Auxiliary agent comprises: trolamine 8 kilograms; Vulkacit H 9 kilograms; Polyvinyl alcohol 6 kilograms; Phthalic acid 10 kilograms, the raw material of weight;
When E. solution D being cooled to 70 DEG C ~ 72 DEG C, add the 3rd batch of urea, keep temperature to be react 20 minutes at 63 DEG C ~ 65 DEG C, obtain solution E; 3rd batch of urea accounts for 20.2% of total urea amount;
When F. solution E being slowly cooled to 52 DEG C ~ 55 DEG C, adding alkali and regulate pH value to 7.1, then add the 4th batch of urea, keep being cooled to 40 DEG C after 10 minutes, then add alkali adjustment pH value to 7.5, put glue, can this tackiness agent be obtained.
Embodiment 2:
The preparation method of this low burst size of methanal tackiness agent, comprises the raw material of following weight:
10800 kilograms, formaldehyde; 8400 kilograms, urea; Trimeric cyanamide 175 kilograms; Auxiliary agent 75 kilograms;
Comprise the steps:
A. formaldehyde is added in reactor, add alkali and regulate pH value to 8.67; Add first urea and trimeric cyanamide, temperature is 30 DEG C ~ 35 DEG C, forms solution A; First urea accounts for 45.8% of total urea amount;
B. reaction at temperature slowly being risen to 89 DEG C ~ 90 DEG C by solution A in 50 minutes, then adds acid and pH value is adjusted to 6.5, be incubated 32 minutes, obtain solution B;
When C. solution B being cooled to 88 DEG C, in solution B, acid adding regulates pH value to 5.4, and temperature is controlled to react at 89 DEG C ~ 90 DEG C; Beginning timing from acid adding, within 120 minutes, reaction end viscosity 22 seconds/30 DEG C, obtains solution C;
When D. solution C being cooled to 80 DEG C ~ 82 DEG C, in solution C, add auxiliary agent, and add alkali adjustment pH value to 7.3, then add second batch urea, react 20 minutes at 70 DEG C ~ 75 DEG C temperature, obtain solution D; Second batch urea accounts for 17.3% of total urea amount; Auxiliary agent comprises: trolamine 8 kilograms; Vulkacit H 9 kilograms; Polyvinyl alcohol 6 kilograms; Phthalic acid 10 kilograms, the raw material of weight;
When E. solution D being cooled to 70 DEG C ~ 72 DEG C, add the 3rd batch of urea, keep temperature to be react 20 minutes at 63 DEG C ~ 65 DEG C, obtain solution E; 3rd batch of urea accounts for 20.2% of total urea amount;
When F. solution E being slowly cooled to 52 DEG C ~ 55 DEG C, adding alkali and regulate pH value to 7.3, then add the 4th batch of urea, keep being cooled to 40 DEG C after 10 minutes, then add alkali adjustment pH value to 8.0, put glue, can this tackiness agent be obtained.
Embodiment 3:
The preparation method of this low burst size of methanal tackiness agent, comprises the raw material of following weight:
10800 kilograms, formaldehyde; 8400 kilograms, urea; Trimeric cyanamide 175 kilograms; Auxiliary agent 75 kilograms;
Comprise the steps:
A. formaldehyde is added in reactor, add alkali and regulate pH value to 8.7; Add first urea and trimeric cyanamide, temperature is 30 DEG C ~ 35 DEG C, forms solution A; First urea accounts for 45.8% of total urea amount;
B. reaction at temperature slowly being risen to 89 DEG C ~ 90 DEG C by solution A in 46 minutes, then adds acid and pH value is adjusted to 6.5, be incubated 32 minutes, obtain solution B;
When C. solution B being cooled to 88 DEG C, in solution B, acid adding regulates pH value to 5.36, and temperature is controlled to react at 89 DEG C ~ 90 DEG C; Beginning timing from acid adding, within 114 minutes, reaction end viscosity 21 seconds/30 DEG C, obtains solution C;
When D. solution C being cooled to 80 DEG C ~ 82 DEG C, in solution C, add auxiliary agent, and add alkali adjustment pH value to 7.2, then add second batch urea, react 20 minutes at 70 DEG C ~ 75 DEG C temperature, obtain solution D; Second batch urea accounts for 17.3% of total urea amount; Auxiliary agent comprises: trolamine 8 kilograms; Vulkacit H 9 kilograms; Polyvinyl alcohol 6 kilograms; Phthalic acid 10 kilograms, the raw material of weight;
When E. solution D being cooled to 70 DEG C ~ 72 DEG C, add the 3rd batch of urea, keep temperature to be react 20 minutes at 63 DEG C ~ 65 DEG C, obtain solution E; 3rd batch of urea accounts for 20.2% of total urea amount;
When F. solution E being slowly cooled to 52 DEG C ~ 55 DEG C, adding alkali and regulate pH value to 7.2, then add the 4th batch of urea, keep being cooled to 40 DEG C after 10 minutes, then add alkali adjustment pH value to 7.7, put glue, can this tackiness agent be obtained.
For verifying the effect of invention adhesive, this tackiness agent being made wood-based plate and detects:
Softening to woodchip, washing, boiling, defibrator process are become fiber, then apply tackiness agent of the present invention, urea and ammonium chloride mixed curing agent, then drying, selection by winnowing, shaping, the hot pressing of mating formation, jack saw, cooling, last sanding cutting edge gets product artificial board.
Described artificial board gluing amount is over dry glue/bone dry fiber=17%, finished product lumber gage lattice are 2440 × 1220 × 15mm, density: 700kg/m
3; According to national standard, sampling Detection is as follows:
Claims (2)
1. a preparation method for low burst size of methanal tackiness agent, is characterized in that: the raw material comprising following weight part:
10800 parts, formaldehyde; 8400 parts, urea; Trimeric cyanamide 175 parts; Auxiliary agent 75 parts;
Comprise the steps:
A. formaldehyde is added in reactor, add alkali and regulate pH value to 8.51 ~ 8.7; Add first urea and trimeric cyanamide, temperature is 30 DEG C ~ 35 DEG C, forms solution A; First urea accounts for 45.8% of total urea amount;
B. reaction at temperature slowly being risen to 89 DEG C ~ 90 DEG C by solution A in 40 minutes ~ 50 minutes, then adds acid and pH value is adjusted to 6.5, be incubated 32 minutes, obtain solution B;
When C. solution B being cooled to 88 DEG C, in solution B, acid adding regulates pH value to 5.3 ~ 5.4, and temperature is controlled to react at 89 DEG C ~ 90 DEG C; Beginning timing from acid adding, within 110 ~ 120 minutes, reaction end viscosity 21 seconds/30 DEG C ~ 22 seconds/30 DEG C, obtains solution C;
When D. solution C being cooled to 80 DEG C ~ 82 DEG C, in solution C, add auxiliary agent, and add alkali adjustment pH value to 7.1 ~ 7.3, then add second batch urea, react 20 minutes at 70 DEG C ~ 75 DEG C temperature, obtain solution D; Second batch urea accounts for 17.3% of total urea amount;
When E. solution D being cooled to 70 DEG C ~ 72 DEG C, add the 3rd batch of urea, keep temperature to be react 20 minutes at 63 DEG C ~ 65 DEG C, obtain solution E; 3rd batch of urea accounts for 20.2% of total urea amount;
When F. solution E being slowly cooled to 52 DEG C ~ 55 DEG C, adding alkali and regulate pH value to 7.1 ~ 7.3, then add the 4th batch of urea, keep being cooled to 40 DEG C after 10 minutes, then add alkali adjustment pH value to 7.5 ~ 8.0, put glue, can this tackiness agent be obtained.
2. the preparation method of low burst size of methanal tackiness agent according to claim 1, is characterized in that: described auxiliary agent comprises: trolamine 8 parts; Vulkacit H 9 parts; Polyvinyl alcohol 6 parts; Phthalic acid 10 parts, the raw material of weight part.
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| CN201310679683.3A CN104513641B (en) | 2013-12-15 | 2013-12-15 | The preparation method of low burst size of methanal adhesive |
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| CN201310679683.3A CN104513641B (en) | 2013-12-15 | 2013-12-15 | The preparation method of low burst size of methanal adhesive |
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| CN104513641B CN104513641B (en) | 2016-09-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524241A (en) * | 2016-01-28 | 2016-04-27 | 四川建丰林业有限公司 | Preparation method of low-formaldehyde and environment-friendly type urea-formaldehyde adhesive for E0-level artificial board and manufacturing method |
| CN107151298A (en) * | 2017-05-09 | 2017-09-12 | 陕西中兴林产科技股份有限公司 | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof |
| CN107841269A (en) * | 2017-11-29 | 2018-03-27 | 柳州市鸿联木业有限公司 | The preparation method of low burst size of methanal adhesive |
| CN113146786A (en) * | 2021-03-25 | 2021-07-23 | 广西贺州恒达板业股份有限公司 | Preparation method of anti-corrosion finger-jointed board wood |
Citations (4)
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|---|---|---|---|---|
| EP0913411A2 (en) * | 1997-10-31 | 1999-05-06 | Elf Atochem S.A. | Process for preparing aqueous urea-formaldehyde-melamine aminoplast resins, their use in adhesives for wood products and the obtained wood products |
| CN1834186A (en) * | 2006-03-15 | 2006-09-20 | 北京林业大学 | Cyanurotriamide modified urea resin and prepn. process |
| CN1966541A (en) * | 2006-11-10 | 2007-05-23 | 北京联合大学生物化学工程学院 | Low formaldehyde release volume urea formaldehyde resin preparation method |
| WO2013144226A1 (en) * | 2012-03-29 | 2013-10-03 | Basf Se | Melamine-reinforced uf glues containing up to 0.9% of melamine for the production of medium-density fiberboards |
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2013
- 2013-12-15 CN CN201310679683.3A patent/CN104513641B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0913411A2 (en) * | 1997-10-31 | 1999-05-06 | Elf Atochem S.A. | Process for preparing aqueous urea-formaldehyde-melamine aminoplast resins, their use in adhesives for wood products and the obtained wood products |
| CN1834186A (en) * | 2006-03-15 | 2006-09-20 | 北京林业大学 | Cyanurotriamide modified urea resin and prepn. process |
| CN1966541A (en) * | 2006-11-10 | 2007-05-23 | 北京联合大学生物化学工程学院 | Low formaldehyde release volume urea formaldehyde resin preparation method |
| WO2013144226A1 (en) * | 2012-03-29 | 2013-10-03 | Basf Se | Melamine-reinforced uf glues containing up to 0.9% of melamine for the production of medium-density fiberboards |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524241A (en) * | 2016-01-28 | 2016-04-27 | 四川建丰林业有限公司 | Preparation method of low-formaldehyde and environment-friendly type urea-formaldehyde adhesive for E0-level artificial board and manufacturing method |
| CN105524241B (en) * | 2016-01-28 | 2018-06-12 | 四川建丰林业有限公司 | EO grades of wood-based plates preparation method of low aldehyde environment-friendly type urea-formaldehyde glue and sticks agent and preparation method thereof |
| CN107151298A (en) * | 2017-05-09 | 2017-09-12 | 陕西中兴林产科技股份有限公司 | Modified urea-formaldehyde glue of E0 grades of medium density fibre board (MDF)s of applewood and preparation method thereof |
| CN107841269A (en) * | 2017-11-29 | 2018-03-27 | 柳州市鸿联木业有限公司 | The preparation method of low burst size of methanal adhesive |
| CN113146786A (en) * | 2021-03-25 | 2021-07-23 | 广西贺州恒达板业股份有限公司 | Preparation method of anti-corrosion finger-jointed board wood |
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| CN104513641B (en) | 2016-09-07 |
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