CN109722178A - A kind of multi-functional gelling agent of wood-based plate and preparation method thereof - Google Patents
A kind of multi-functional gelling agent of wood-based plate and preparation method thereof Download PDFInfo
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- CN109722178A CN109722178A CN201811577871.4A CN201811577871A CN109722178A CN 109722178 A CN109722178 A CN 109722178A CN 201811577871 A CN201811577871 A CN 201811577871A CN 109722178 A CN109722178 A CN 109722178A
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Abstract
A kind of multi-functional gelling agent of wood-based plate of the present invention and preparation method thereof, gelling agent is mixed with by urea, phosphoric acid, ammonium hydrogen carbonate and water, and step includes: S01, and urea and water is added, rear slowly to add phosphoric acid, is warming up to certain temperature；Ammonium hydrogen carbonate is added in S02, Xiang Shangshu solution, after heating and keeps the temperature；Above-mentioned solution is down to certain temperature, adjusts its pH value by S03；S04 measures solution ph every 5-10min at a certain temperature, and when pH value reaches certain value, continuation is reacted at such a temperature until solution viscosity reaches designated value；S05, water flowing is cooling after heat preservation, releases it from reaction kettle after the pH value of solution is adjusted after temperature drops to 40-50 DEG C, is added in adhesive after stirring and uses.Multi-functional gelling agent of wood-based plate provided by the invention and preparation method thereof, adhesive and air aldehyde resin usage amount are few, and bonding strength is high, do not corrode heating platen metal, high production efficiency is halogen-free, more environmentally friendly.
Description
Technical field
The invention belongs to wood processing technique fields, and in particular to a kind of multi-functional gelling agent of wood-based plate and its preparation side
Method.
Background technique
In the wood-based panel industry, in order to improve Lauxite, phenolic resin, the curing rate of melamine resin glue and true
The glue-line protected after solidifying has enough cohesive strengths, and gelling agent is added thereto can be used to improve the rapid polymerization speed of adhesive
Degree.The type and dosage of gelling agent are an important factor for influencing adhesive.At present in China, wood processing enterprise is the most commonly used
It is ammonium chloride, but when making gelling agent using ammonium chloride, chloride ion can not only corrode metal, especially hot pressing metal plate, and produce
Wood-based plate out may be a potential environomental pollution source, because timber-work containing chlorine may generate toxicity pole in burning
Strong dioxin.It has been caused seriously using ammonium chloride as the processing problem of the wood-based plate of gelling agent in many industrialized countries
It is deeply concerned.The particieboard on the ground such as European Union member countries, Canada, New Zealand, medium density fibre board (MDF) manufacturer no longer or will stop
Using ammonium chloride, some production firms are also using its product not mark of the containing ammonium chloride as the feature of environmental protection.
With being increasingly enhanced for people's environmental consciousness, the increasingly deep people of the ideas such as Green design, green manufacturing, green consumption is arrived
The various aspects of people's life.Wood-based Panel Production and the Form aldehyde release problem in have received considerable degree of heavy at present
Depending on, but be recycled issuable pernicious gas pollution and not yet arouse attention, ammonium chloride is still the main selection of gelling agent.
With the mass production and use of China's wood-based plate, a large amount of waste artificial boards how are handled from now on, reduce associated nocuousness
Gas release will also become a major issue.In addition, the outlet of the timber-work containing chlorine is also possible to that some country's formulations can be encountered
Green Trade Barrier.
In wood-based plate processing industry, it is badly in need of gluing that a kind of polymer is greatly improved between kind of an air aldehyde resin and poly-
It closes, and air aldehyde resin is needed to volatilize low wood-based plate.In antigravity system, existing E3 > E2 > E1 > E0 transformation production process
It is middle that there are the content height of residual aldehydes, hot pressing speed in low output, plate to contain extra acid corrosion gold slowly, in low output, system
The disadvantages of category.
Summary of the invention
To solve problems of the prior art, the present invention provides a kind of multi-functional gelling agent of wood-based plate and its preparation side
Method, according to the analysis to adhesive curing reaction and the curing agent mechanism of action, with urea, phosphoric acid, ammonium hydrogen carbonate and the compound system of water
Standby gelling agent, from the point of view of practical operation angle, above-mentioned gelling agent can be direct as ammonium chloride or be configured to aqueous solution addition
Into resin, exchanging gluing equipment and technique does not have different requirements, there is adhesive usage amount to reduce, bonding strength improves, aldehydes
Resin usage amount reduces, is free of the advantages that extra acid corrosion hot pressing sheetmetal, production efficiency raising, and is halogen-free, more ring
It protects.
To reach goal of the invention, the present invention is adopted the following technical scheme that:
A kind of multi-functional gelling agent of wood-based plate, the gelling agent are mixed with by urea, phosphoric acid, ammonium hydrogen carbonate and water, with
Poidometer, urea, phosphoric acid, ammonium hydrogen carbonate and water content are respectively as follows: 48-52:48-52:10-20:95-105.
Further, comprising the following steps:
(1) urea and water is added, it is rear slowly to add phosphoric acid, slowly it is uniformly heating to certain temperature；
(2) ammonium hydrogen carbonate is added into step (1) described solution, after heating and held for some time；
(3) step (2) described solution is down to certain temperature, sodium hydroxide is added or formic acid adjusts its pH value；
(4) at a certain temperature every the pH value of 5-10min measuring process (3) solution, after pH value reaches certain numerical value,
Continue reaction at such a temperature until solution viscosity reaches designated value, progress step (5)；
(5) water flowing is cooling after keeping the temperature a period of time, the pH value of solution is adjusted after temperature drops to 40-50 DEG C, after the completion of adjusting
It is released from reaction kettle, is added in adhesive and uses after mixing evenly.
Preferably, in step (1), the time slowly uniformly heated up is 25-35min, and final temperature is 55-65 DEG C.
Preferably, in step (2), the heating-up time of the solution is 25-35min, and final temperature is 75-85 DEG C, the heat preservation
Time is 55-65min.
Preferably, in step (3), the solution drops to 56-64 DEG C.
Preferably, in step (3), the pH value of the solution is adjusted to 4-4.8 after sodium hydroxide or formic acid is added, described
PH value adjusting is completed in 20min.
Preferably, in step (4), every the pH value of 5-10min measuring process (3) solution at a temperature of 56-64 DEG C.
Preferably, in step (4), after the solution ph reaches 2-2.8, continue reaction at such a temperature until solution is viscous
Degree reaches designated value.
Preferably, in step (4), the solution viscosity is measured as 13-16s using -4 flow cups are applied.
Preferably, in step (5), the soaking time is 25-35min, and the solution ph is 1.2-2.
Compared with the prior art, the invention has the benefit that
(1) adhesive usage amount is saved.Multi-functional gelling agent greatly improves the cohesive bond between air aldehyde resin, to reach higher
Adhesion strength can at most save 22% adhesive usage amount under conditions of obtaining same intensity；
(2) production efficiency improves.When conventional method does gelling agent using ammonium chloride, solubility is limited, needs suitable long gel
Time, and multi-functional gelling agent solubility is good, is added in adhesive and is substantially shorter gel time；
(3) moisture content variation is better adapted to.Increase the dosage of multi-functional gelling agent, changes catalyst amount, avoid
Lead to the decline of productivity because moisture content improves in wet season；
(4) it not will form acidolysis after resin reaction.When doing gelling agent using ammonium chloride, the chloride ion remained in wood can be to gold
Belong to, corrosion especially is generated to heating platen, and multi-functional gelling agent does not have this phenomenon；
(5) dosage of air aldehyde resin is greatly reduced.Ammonium chloride system, due to promoting polymeric gel between resin in E0/E1 resin
The formaldehyde amount connect reduces, and multi-functional gelling agent antigravity system does not need the cohesive bond being additionally added between formaldehyde promotion resin；
(6) dangerous material are not belonging to, are halogen-free, are environment-friendly products, are transported, when preservation is safer；
(7) in the case where not reducing production efficiency and not increasing amount of resin, reach low aldehydes volatility.Using multi-functional
Gelling agent can produce E1 class using the system of E2 glue and produce in the case where not reducing speed of production and not increasing Lauxite
Product, to improve the profit of producer.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Embodiment 1
A kind of multi-functional gelling agent of wood-based plate, the gelling agent are mixed with by urea, phosphoric acid, ammonium hydrogen carbonate and water, with
Poidometer, urea, phosphoric acid, ammonium hydrogen carbonate and water content are respectively as follows: 50:50:15:100.
A kind of preparation method of the multi-functional gelling agent of wood-based plate, comprising the following steps:
(1) urea and water is added, it is rear slowly to add phosphoric acid, 60 DEG C are slowly uniformly heating in 30min；
(2) ammonium hydrogen carbonate is added into step (1) described solution, about 30min is warming up to 80 DEG C, and keeps the temperature 60min；
(3) after keeping the temperature, step (2) described solution is down to 60 DEG C, slowly adjusted in 20min with sodium hydroxide pH value to
4.2；
(4) continue at such a temperature every the pH value of 5min measuring process (3) solution when pH value is 2.2 at 60 DEG C
Reaction is until solution viscosity is measured as 13s using -4 flow cups are applied；
(5) water flowing is cooling after keeping the temperature 30min, by it from reaction when adjusting the pH value of solution after temperature drops to 45 DEG C to 1.4
Kettle is released, and is added in adhesive and is used after mixing evenly.
Embodiment 2
A kind of multi-functional gelling agent of wood-based plate, the gelling agent are mixed with by urea, phosphoric acid, ammonium hydrogen carbonate and water, with
Poidometer, urea, phosphoric acid, ammonium hydrogen carbonate and water content are respectively as follows: 48:48:10:95.
A kind of preparation method of the multi-functional gelling agent of wood-based plate, comprising the following steps:
(1) urea and water is added, it is rear slowly to add phosphoric acid, 59 DEG C are slowly uniformly heating in 28min；
(2) ammonium hydrogen carbonate is added into step (1) described solution, about 25min is warming up to 75 DEG C, and keeps the temperature 65min；
(3) after keeping the temperature, step (2) described solution is down to 58 DEG C, slowly adjusted in 20min with sodium hydroxide pH value to
4.4；
(4) continue at such a temperature every the pH value of 5min measuring process (3) solution when pH value is 2.6 at 58 DEG C
Reaction is until solution viscosity is measured as 14s using -4 flow cups are applied；
(5) water flowing is cooling after keeping the temperature 25min, by it from reaction when adjusting the pH value of solution after temperature drops to 40 DEG C to 1.6
Kettle is released, and is added in adhesive and is used after mixing evenly.
Embodiment 3
A kind of multi-functional gelling agent of wood-based plate, the gelling agent are mixed with by urea, phosphoric acid, ammonium hydrogen carbonate and water, with
Poidometer, urea, phosphoric acid, ammonium hydrogen carbonate and water content are respectively as follows: 52:52:20:105.
A kind of preparation method of the multi-functional gelling agent of wood-based plate, comprising the following steps:
(1) urea and water is added, it is rear slowly to add phosphoric acid, 61 DEG C are slowly uniformly heating in 31min；
(2) ammonium hydrogen carbonate is added into step (1) described solution, about 32min is warming up to 82 DEG C, and keeps the temperature 56min；
(3) after keeping the temperature, step (2) described solution is down to 62 DEG C, slowly adjusted in 20min with sodium hydroxide pH value to
4.7；
(4) continue at such a temperature every the pH value of 5min measuring process (3) solution when pH value is 2.5 at 62 DEG C
Reaction is until solution viscosity is measured as 16s using -4 flow cups are applied；
(5) water flowing is cooling after keeping the temperature 30min, by it from reaction when adjusting the pH value of solution after temperature drops to 50 DEG C to 1.7
Kettle is released, and is added in adhesive and is used after mixing evenly.
The output of medium density fibre board (MDF) MDF is 27.2 m3/ h, is roughly equal to 17000m3/ the moon, (26 working days were for 24 hours one
A working day), price is 1200 yuan/m3, 20,400,000 yuan/month of sales volume.When producing the MDF of identical yield, with 17000m3/
For month:
Conventional method makees gelling agent using ammonium chloride:
Produce E2 grades of MDF costs: E2 adhesive dosage is the 1530t/ month, the cost of adhesive: 1530t × 2200 yuan/t=
3366000 yuan；Ammonium chloride cost are as follows: 9.9t × 1300 yuan/t=12870 member.Cost is total: 3378870 yuan.
Produce E1 grades of MDF costs: E1 adhesive dosage is the 1530t/ month, the cost of adhesive: 1530t × 2500 yuan/t=
3825000 yuan；Ammonium chloride cost are as follows: 9.9t × 1300 yuan/t=12870 member.Cost is total: 3837870 yuan.
Use multi-functional gelling agent of the invention:
E1 grades of MDF costs of production: being the effect that can reach E1 glue, E2 glue dosage:, can after adding multi-functional gelling agent using E2 glue
Reduce by 20% Lauxite dosage, the 1530t/ month × 80%=1224t/ month；The cost of adhesive is 1224t × 2200 yuan/t=
2692800 yuan；The cost of multi-functional gelling agent are as follows: 11t × 3000 yuan/t=33000 member, cost are total: 2725800 yuan.
The interpretation of result of 1-3 in conjunction with the embodiments:
Gelling agent of the invention is compared with the traditional method: (1) usage amount of glue reduces, and main product cost reduces significant；It is (2) environmentally friendly,
E1 grades of MDF can be produced with E2 glue.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of multi-functional gelling agent of wood-based plate, which is characterized in that the gelling agent is mixed by urea, phosphoric acid, ammonium hydrogen carbonate and water
Conjunction is prepared, and by weight, urea, phosphoric acid, ammonium hydrogen carbonate and water content are respectively as follows: 48-52:48-52:10-20:95-
105。
2. a kind of preparation method of the multi-functional gelling agent of wood-based plate, which comprises the following steps:
(1) urea and water is added, then slowly adds phosphoric acid, is slowly uniformly heating to certain temperature；
(2) ammonium hydrogen carbonate is added into step (1) described solution, after heating and held for some time；
(3) step (2) described solution is down to certain temperature, then adjusts the pH value of solution；
(4) at a certain temperature every the pH value of 5-10min measuring process (3) solution, after pH value reaches certain numerical value,
Continue reaction at such a temperature until solution viscosity reaches designated value, progress step (5)；
(5) water flowing is cooling after keeping the temperature a period of time, is adjusted it after the pH value of solution after temperature drops to 40-50 DEG C from reaction
Kettle is released, and is added in adhesive and is used after mixing evenly.
3. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (1)
In, the time slowly uniformly heated up is 25-35min, and final temperature is 55-65 DEG C.
4. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (2)
In, the heating-up time of solution is 25-35min, and final temperature is 75-85 DEG C, soaking time 55-65min.
5. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (3)
In, step (2) described solution is down to 56-64 DEG C again by the pH value of addition sodium hydroxide or first acid-conditioning solution.
6. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 5, which is characterized in that pass through addition
The pH value of solution is adjusted to 4-4.8 by sodium hydroxide, and the adjusting of pH value is completed in 20min.
7. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (4)
In, every the pH value of 5-10min measuring process (3) solution at a temperature of 56-64 DEG C, after solution ph is 2-2.8, after
Continuous reaction at such a temperature is until solution viscosity reaches designated value.
8. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (4)
In, the solution viscosity is measured as 13-16s using -4 flow cups are applied.
9. a kind of preparation method of the multi-functional gelling agent of wood-based plate according to claim 2, which is characterized in that step (5)
In, the soaking time is 25-35min, and the solution ph is 1.2-2.
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| CN201811577871.4A CN109722178A (en) | 2018-12-24 | 2018-12-24 | A kind of multi-functional gelling agent of wood-based plate and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104610885A (en) * | 2015-01-04 | 2015-05-13 | 文安县天华密度板有限公司 | Method for producing environment-friendly density boards, and special medium-low temperature solidifying agent |
| CN106349966A (en) * | 2016-09-30 | 2017-01-25 | 云南玉加宝人造板有限公司 | Formula of floor base material fiberboard curing agent |
| WO2018215742A9 (en) * | 2017-05-20 | 2020-01-02 | Materialize.X Limited | Binder materials |
-
2018
- 2018-12-24 CN CN201811577871.4A patent/CN109722178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104610885A (en) * | 2015-01-04 | 2015-05-13 | 文安县天华密度板有限公司 | Method for producing environment-friendly density boards, and special medium-low temperature solidifying agent |
| CN106349966A (en) * | 2016-09-30 | 2017-01-25 | 云南玉加宝人造板有限公司 | Formula of floor base material fiberboard curing agent |
| WO2018215742A9 (en) * | 2017-05-20 | 2020-01-02 | Materialize.X Limited | Binder materials |
Non-Patent Citations (1)
| Title |
|---|
| 赵临五等: "《脲醛树脂胶黏剂——制备、配方、分析与应用》", 30 September 2005, 化学工业出版社 * |
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Application publication date: 20190507 |