CN107573533A - A kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam - Google Patents
A kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam Download PDFInfo
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- CN107573533A CN107573533A CN201710673519.XA CN201710673519A CN107573533A CN 107573533 A CN107573533 A CN 107573533A CN 201710673519 A CN201710673519 A CN 201710673519A CN 107573533 A CN107573533 A CN 107573533A
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- formaldehyde resin
- melamine urea
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Abstract
A kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam, step are as follows：（1）Surfactant is added in melamine urea-formaldehyde resin solution and under 300r/min rotating speed, stirred；（2）After adding foaming agent in said mixture, under 500r/min rotating speed, 1min is stirred；（3）After color bleaches, curing agent is added, and is increased speed rapidly to 1000r/min, stirs 20 30S；（4）Said mixture is poured into mould, is put into thermostatic drying chamber and is dried.When foam is non-blocking, taking-up continues drying.Melamine urea-formaldehyde resin foam prepared by the present invention has higher water imbibition, water-retaining property and percent opening.Its water absorption rate may be up to 1400% ~ 2800%；Water retention can maintain to reach 420min ~ 720min；Porosity is up to 60% ~ 92.8%.
Description
Technical field
The invention belongs to technical field of chemical products, is related to a kind of high water absorbing and retaining performances opening melamine urea-formaldehyde resin bubble
The preparation method of foam.
Background technology
Melamine urea-formaldehyde resin foam is in the presence of curing agent, and resin takes place cross-linking reaction and causes system to stick
Degree gradually increase, limits the diffusion, merging and rupture of foam, and final crosslinking curing is into the plastics with loose structure.Now
Urea formaldehyde condensate foam has industrially been widely used as building heat preservation heat-barrier material, and foam because have compared with
Excellent water absorbing properties, the seedling medium for also serving as turf rice are applied in agricultural production.C.-L. Chan, D.C. Joyce
By modified urea-formaldehyde resin foam applications into compounded turf matrix, its volume 60% can water holding, provide abundant water money for plant
Source, its turf germination speed are also fast.The experiments such as Panayiotis A. Nektarios have authenticated the foam matrix value and its
Utilizability.Urea formaldehyde resin foam have the function that as soil modifier to treelet seedling it is limited, research when showing in sand and
30% is added in loam（Volume/volume）Urea formaldehyde resin foam can improve it is potted plant house Supreme Being silk wood sapling growth.
According to the difference of blowing agent type, the method for preparing resin foam mainly has machinery, physics, chemical blowing process.But
It is that the current research according to water suction, in terms of water retention property prepares urea-formaldehyde foam is seldom.Froth appearance prepared by chemical blowing process is close
Degree is high, and water imbibition is poor；Foam prepared by mechanical foaming method and physical blowing method has higher water imbibition, but mechanical foaming method is steeped
The abscess microscopic pattern of foam is poor；Physical blowing method foam has a fine and close mode of appearance, higher water absorption rate water retention and opens
Porosity, its microscopic pattern are good.
The content of the invention
It is an object of the invention to provide a kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam.
The present invention is achieved by the following technical solutions.
A kind of preparation process of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam of the present invention, is resin
In the presence of foam stabilizer, the process of foaming and solidification progress simultaneously.Its preparation method and step are as follows.
（1）Added in melamine urea-formaldehyde resin solution and be dissolved in the surfactant of water and in 300r/min rotating speed
Under, stir.
（2）After adding foaming agent in said mixture, under 500r/min rotating speed, 1min is stirred.
（3）After color bleaches, curing agent is added, and is increased speed rapidly to 1000r/min, stirs 20 ~ 30S.
（4）Said mixture is poured into mould, is put into thermostatic drying chamber and is dried.When foam is non-blocking
Wait, taking-up continues to dry 24h.
Step（1）The kind surfactant is anion surfactant dodecyl sodium sulfate, and its usage amount is three
The 0.3% ~ 1.2% of poly cyanamid Lauxite amount.Wherein, its viscosity is controlled by changing content of water in system, that is, controls aqueous solvent
Addition, its usage amount be melamine urea-formaldehyde resin amount 4% ~ 20%.
Step（2）The foaming agent is low boiling alkane, pentane or the petroleum ether that boiling point is 30 DEG C ~ 60 DEG C, and it makes
Dosage is the 2% ~ 12% of melamine urea-formaldehyde resin amount.
Step（3）The curing agent is the mixture of organic acid p-methyl benzenesulfonic acid and inorganic acid phosphoric acid, concentration 50%, its
Usage amount is the 1% ~ 6% of melamine urea-formaldehyde resin amount.
Step（4）The mould is 15cm × 9cm × 3cm, and drying temperature is 40 DEG C ~ 80 DEG C.
The invention provides a kind of preparation method of lightweight high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam.Should
Matrix can be used for soilless culture, Green Roof structure and green engineering plant culture, so as to solve in existing soiless and three-dimensional culture
Because cultivation matrix relies on the container restricted problem of container curable type, solve plant in soilless culture fix, water conservation, nutrition and aerobic
The problems such as, solve the load-bearing restricted problem and problem of management of Green Roof structure, solve the plant that existing vertical planting engineering uses
Thing cultivation matrix water retaining function is poor, and matrix is easy to run off problem, and solves existing water-absorbing resin and be not suitable for plant tridimensional planting
Technical problem.
Melamine urea-formaldehyde resin foam prepared by the present invention has higher water imbibition, water-retaining property and percent opening.Its
Water absorption rate may be up to 1400% ~ 2800%；Water retention can maintain to reach 420min ~ 720min；Porosity is up to 60% ~ 92.8%.
Brief description of the drawings
Accompanying drawing 1 is lightweight high water absorbing and retaining performances opening melamine urea-formaldehyde resin foamy appearance prepared by physical blowing method
Figure.
Accompanying drawing 2 is the microcosmic scanning electron microscope sem figure of melamine urea-formaldehyde resin foam.
Embodiment
The present invention will be described further by following examples.
Embodiment 1.
Weigh 50g melamine urea-formaldehyde resins（Melamine urea-formaldehyde resin viscosity used is 112mpas）, in 500 millis
Rise in beaker, weigh 0.5% dodecyl sodium sulfate and be dissolved in 4 milliliters of water, be added in resin and stir.Add 10%
Foaming agent pentane, stir rapidly；5% curing agent phosphoric acid and the mixed acid of p-methyl benzenesulfonic acid are added, is poured into rapidly
In 40 DEG C of mould and carry out constant temperature foamed solidification 24h.Foam after solidification is subjected to cutting process, neutral drying is washed till and carries out
Water absorption rate, water retention, apparent density measure.It is 81.8% that experiment, which measures its porosity, and water absorption rate 2423%, porosity is water conservation
Time is 720min, apparent density 0.050g/cm3 。
Embodiment 2.
Weigh 50g melamine urea-formaldehyde resins（Melamine urea-formaldehyde resin viscosity used is 112mpas）In 500 milliliters
In beaker, 0.3% dodecyl sodium sulfate is weighed in 6 milliliters of water, is added in resin and stirs.Add 8% hair
Infusion pentane, stirs rapidly；5% curing agent phosphoric acid and the mixed acid of p-methyl benzenesulfonic acid are added, pours into 60 DEG C rapidly
Mould in and carry out constant temperature foamed solidification 24h.Foam after solidification is subjected to cutting process, neutral drying is washed till and is absorbed water
Rate, water retention, apparent density measure.It is 61.5% that experiment, which measures its porosity, and water absorption rate 1712%, porosity is the water conservation time
For 630min, apparent density 0.064g/cm3。
Claims (1)
- A kind of 1. preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam, it is characterized in that step is as follows：（1）Surfactant is added in melamine urea-formaldehyde resin solution and under 300r/min rotating speed, stirred；（2）After adding foaming agent in said mixture, under 500r/min rotating speed, 1min is stirred；（3）After color bleaches, curing agent is added, and is increased speed rapidly to 1000r/min, stirs 20-30S；（4）Said mixture is poured into mould, is put into thermostatic drying chamber and is dried；Step（1）Described in surfactant be anion surfactant dodecyl sodium sulfate, usage amount is melamine The 0.3%-1.2% of Lauxite amount；Lauxite is that water-soluble resin can control its viscosity by changing content of water in system, Change the addition of tenside/solvent water, its usage amount is the 4%-20% of melamine urea-formaldehyde resin amount；Step（2）Described in foaming agent be petroleum ether that low boiling alkane, pentane or boiling point are 30 DEG C -60 DEG C, it is used Measure as the 2%-12% of melamine urea-formaldehyde resin amount；Step（3）Described in curing agent be organic acid p-methyl benzenesulfonic acid and inorganic acid phosphoric acid mixture, concentration 50%, it makes Dosage is the 1%- 6% of melamine urea-formaldehyde resin amount；Step（4）Described in drying temperature be 40 DEG C -80 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710673519.XA CN107573533A (en) | 2017-08-09 | 2017-08-09 | A kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710673519.XA CN107573533A (en) | 2017-08-09 | 2017-08-09 | A kind of preparation method of high water absorbing and retaining performances opening melamine urea-formaldehyde resin foam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868018A (en) * | 2018-06-21 | 2018-11-23 | 南昌大学 | A kind of simple-type Green Roof integrating accumulation and purification |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061059A (en) * | 2010-12-22 | 2011-05-18 | 中国林业科学研究院林产化学工业研究所 | Wood fiber reinforced inflaming retarding foam material and machining method thereof |
| CN105440575A (en) * | 2015-12-28 | 2016-03-30 | 东北林业大学 | Strength/toughness-modified urea formaldehyde resin foam thermal-insulation material and preparation method thereof |
-
2017
- 2017-08-09 CN CN201710673519.XA patent/CN107573533A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061059A (en) * | 2010-12-22 | 2011-05-18 | 中国林业科学研究院林产化学工业研究所 | Wood fiber reinforced inflaming retarding foam material and machining method thereof |
| CN105440575A (en) * | 2015-12-28 | 2016-03-30 | 东北林业大学 | Strength/toughness-modified urea formaldehyde resin foam thermal-insulation material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868018A (en) * | 2018-06-21 | 2018-11-23 | 南昌大学 | A kind of simple-type Green Roof integrating accumulation and purification |
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Application publication date: 20180112 |