CN107619574A - A kind of water-retaining property melamino-formaldehyde foamed material and preparation method thereof - Google Patents
A kind of water-retaining property melamino-formaldehyde foamed material and preparation method thereof Download PDFInfo
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- CN107619574A CN107619574A CN201710963284.8A CN201710963284A CN107619574A CN 107619574 A CN107619574 A CN 107619574A CN 201710963284 A CN201710963284 A CN 201710963284A CN 107619574 A CN107619574 A CN 107619574A
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Abstract
The invention discloses a kind of water-retaining property melamino-formaldehyde foamed material and preparation method thereof, mainly it is made up of the raw material of following parts by weight：Melamine, formaldehyde, hydrophilic modifier, base catalyst, emulsifying agent, curing agent, foaming agent, auxiliary agent；Its preparation process comprises the following steps：Melamine resin is made using melamine, formaldehyde, hydrophilic modifier, base catalyst；Resin is uniformly mixed with emulsifying agent, curing agent, foaming agent and auxiliary agent, foamable in microwave field is placed in and obtains water-retaining property melamino-formaldehyde foam.Melamino-formaldehyde foam produced by the present invention has stronger hydrophilicity and water retention property.
Description
Technical field
The present invention relates to technical field of chemistry, and in particular to a kind of water-retaining property melamino-formaldehyde foamed material and its preparation
Method.
Background technology
Melamine foamed plastic is a kind of with high opening rate, the novel foamed plastic of three-dimensional net structure, is had very excellent
The performances such as good sound absorbing capabilities, fire resistance, heat-proof quality, water suction-water retention property, hydrothermal stability and secondary operation, because
And there is quite varied application field.
The current report for having had some both at home and abroad on melamino-formaldehyde foam, but also seldom see about being directed to it
The research of water retention property, due to the high opening rate of foam in itself, melamino-formaldehyde foam carries stronger water absorbing properties, but its
Water retention property has no advantage compared with current existing foam.
The content of the invention
The purpose of the present invention is that to solve the above problems and provides a kind of water-retaining property melamino-formaldehyde foam material
Material and preparation method thereof.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of water-retaining property melamino-formaldehyde foamed material, is mainly made up of the raw material of following parts by weight：1~20 part of trimerization
Cyanamide, 10~100 parts of formaldehyde, 100~800 parts of water, 0~10 part of base catalyst, 1~15 part of modifying agent containing hydrophilic radical,
0.1~10 part of curing agent, 0~20 part of foaming agent, 0~10 part of emulsifying agent and 0~20 part of auxiliary agent.
Further, mainly react to obtain with the raw material of following parts by weight：1~20 part of melamine, 20~70 parts of formaldehyde,
200~500 parts of water, 0.1~5 part of base catalyst, 4~10 parts of modifying agent containing hydrophilic radical, 0.1~5 part of curing agent, 2~
8 parts of foaming agents, 3~6 parts of emulsifying agents and 0~20 part of auxiliary agent.
Further, the base catalyst is sodium hydroxide, potassium hydroxide, sodium carbonate, diethanol amine and triethanolamine
At least one of.
Further, the modifying agent containing hydrophilic radical is urea, acrylic acid, acrylamide, vinyl alcohol, starch and fibre
One kind in dimension element.
Further, the curing agent is at least one of hydrochloric acid, phosphoric acid, acetic acid, boric acid and glutamic acid.
Further, the foaming agent is sodium carbonate, sodium acid carbonate, saleratus and low boiling alkane, ethers, halogenated hydrocarbons
At least one of.
Further, the emulsifying agent be alkylbenzenesulfonate, APES, Ben-zylphenol Polyoxyethyl Ether,
At least one of phenethyl phenol polyethenoxy ether and alkylnaphthalene sulfonate.
Further, the auxiliary agent is at least one of tackifier, stabilizer, filler, pigment.
A kind of water-retaining property melamino-formaldehyde foamed material preparation method, the described method comprises the following steps：
(1) 70~90 DEG C of temperature control, according to it is described proportioning sequentially add formaldehyde, base catalyst, melamine, containing hydrophilic group
The modifying agent of group, react 30~80 minutes, obtain modified melamine-formaldehyde resin.
(2) 10~30 DEG C of temperature control, emulsifying agent, curing agent, foaming agent and auxiliary agent are added into resin according to proportioning, and stirring is mixed
Close uniform.
(3) foamable is carried out to the resin that mixes using microwave radiation, after the completion of foaming, then it is placed on 160~
50~80min of curing is carried out in 200 DEG C of baking ovens, foam is cut can obtain water-retaining property melamino-formaldehyde bubble afterwards
Foam.
The beneficial effects of the present invention are：
In the present invention in production of melamine formaldehyde resin, by adding the modifying agent containing hydrophilic radical with to resin chain
Upper grafting hydrophilic group, so as to improve the hydrophilic and water retention property of resin and foam；Water-retaining property melamine of the present invention
Formaldehyde foam is applicable to the fields such as the soilless culture required to hydrophilic, the water retention property of material.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, make detailed
It is described as follows.
Embodiment
The present invention is expanded on further below in conjunction with example, if without special suggestion in example, raw materials used is conventional commercial
Raw material.
Embodiment 1：
Prepare modified melamine-formaldehyde resin：500g water is added into 1000ml four-hole boiling flasks, is warming up to 80 DEG C, is added
350g formaldehyde, low speed (170r/min) stirring, 30% sodium hydroxide solution regulation pH to 8~9 is added, adds 300g melamines
Amine, at a high speed (350r/min) stirring, 85~90 DEG C of temperature control, resin start to add 20g urea during bleach, continue stirring to resin
All-transparent, react 30~70min after with cloud point method judge reaction end, discharge and produce modified melamine-formaldehyde resin.
Prepare water-retaining property melamino-formaldehyde foam：The resin 300g after obtained cool down is taken, under the conditions of low temperature water-bath
6g neopelexes are added, is well mixed with hand-held mixer, is added 8g benzoic acid, equally stir and evenly mix, then
35g dichloro one fluoroethanes are added, after stirring, resin is poured into foam box, is placed in microwave field in foamable 5min,
Microwave power is reduced again and continues the 3min that foams, then is placed in 180 DEG C of baking ovens and carries out 35~50min of curing, from foaming box body
Water-retaining property melamino-formaldehyde foam is made in middle taking-up.
Water-retaining property melamino-formaldehyde foam density made from above method is 5.5Kg/m3, under room temperature condition, water suction
24h, its water absorption rate are 30280.62%；Under room temperature condition, free percentage of water loss is 85.31%；And conventional melamino-formaldehyde bubble
Water absorption rate is 19864.45% under foam equal conditions, percentage of water loss 97.38%.
Embodiment 2：
Prepare modified melamine-formaldehyde resin：600g water is added into 1000ml four-hole boiling flasks, is warming up to 80 DEG C, is added
400g formaldehyde, low speed (170r/min) stirring, 30% sodium hydroxide solution regulation pH to 8~9 is added, adds 350g melamines
Amine, at a high speed (350r/min) stirring, 85~90 DEG C of temperature control, resin start to add 24ml propylene acid solutions during bleach, add 30%
Sodium hydroxide solution adjusts pH to 8~9, is further continued for stirring to resin all-transparent, is judged instead with cloud point method after reacting 30~70min
Terminal is answered, discharges and produces modified melamine-formaldehyde resin.
Prepare water-retaining property melamino-formaldehyde foam：The resin 250g after obtained cool down is taken, under the conditions of low temperature water-bath
5g neopelexes are added, is well mixed with hand-held mixer, is added 6g benzoic acid, equally stir and evenly mix, then
30g dichloro one fluoroethanes are added, after stirring, resin is poured into foam box, is placed in microwave field in foamable 5min,
It is placed on again in 180 DEG C of baking ovens and carries out 35~50min of curing, then reduce microwave power and continue the 3min that foams, from foaming box body
Water-retaining property melamino-formaldehyde foam is made in middle taking-up.
Water-retaining property melamino-formaldehyde foam density made from above method is 4.9Kg/m3, under room temperature condition, water suction
24h, its water absorption rate are 32018.48%；Under room temperature condition, free percentage of water loss is 81.55%；And conventional melamino-formaldehyde bubble
Water absorption rate is 19864.45% under foam equal conditions, percentage of water loss 97.38%.
Above-described embodiment is presently preferred embodiments of the present invention, is not the limitation to technical solution of the present invention, as long as
The technical scheme that can be realized on the basis of above-described embodiment without creative work, it is regarded as falling into patent of the present invention
Rights protection scope in.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply and deposited between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability includes, so that process, method, article or equipment including a series of elements not only will including those
Element, but also the other element including being not expressly set out, or it is this process, method, article or equipment also to include
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element also be present in process, method, article or equipment including the key element.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of water-retaining property melamino-formaldehyde foamed material, it is characterised in that be mainly made up of the raw material of following parts by weight：1
~20 parts of melamines, 10~100 parts of formaldehyde, 100~800 parts of water, 0~10 part of base catalyst, 1~15 part contains hydrophilic radical
Modifying agent, 0.1~10 part of curing agent, 0~20 part of foaming agent, 0~10 part of emulsifying agent and 0~20 part of auxiliary agent.
2. water-retaining property melamino-formaldehyde foamed material according to claim 1, it is characterised in that mainly with following weight
The raw material of part reacts to obtain：1~20 part of melamine, 20~70 parts of formaldehyde, 200~500 parts of water, 0.1~5 part of base catalysis
Agent, 4~10 parts of modifying agent containing hydrophilic radical, 0.1~5 part of curing agent, 2~8 parts of foaming agents, 3~6 parts of emulsifying agents and 0~20
Part auxiliary agent.
3. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：The alkalescence is urged
Agent is at least one of sodium hydroxide, potassium hydroxide, sodium carbonate, diethanol amine and triethanolamine.
4. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：It is described containing hydrophilic
The modifying agent of group is one kind in urea, acrylic acid, acrylamide, vinyl alcohol, starch and cellulose.
5. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：The curing agent
For at least one of hydrochloric acid, phosphoric acid, acetic acid, boric acid and glutamic acid.
6. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：The foaming agent
For at least one of sodium carbonate, sodium acid carbonate, saleratus and low boiling alkane, ethers, halogenated hydrocarbons.
7. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：The emulsifying agent
For alkylbenzenesulfonate, APES, Ben-zylphenol Polyoxyethyl Ether, phenethyl phenol polyethenoxy ether and alkylnaphthalene sulphur
At least one of hydrochlorate.
8. water-retaining property melamino-formaldehyde foamed material according to claim 1 or 2, it is characterised in that：The auxiliary agent is
At least one of tackifier, stabilizer, filler, pigment.
9. a kind of water-retaining property melamino-formaldehyde foamed material preparation method, it is characterised in that the described method comprises the following steps：
(1) 70~90 DEG C of temperature control, according to it is described proportioning sequentially add formaldehyde, base catalyst, melamine, containing hydrophilic radical
Modifying agent, react 30~80 minutes, obtain modified melamine-formaldehyde resin.
(2) 10~30 DEG C of temperature control, emulsifying agent, curing agent, foaming agent and auxiliary agent are added according to proportioning into resin, be stirred
It is even.
(3) foamable is carried out to the resin mixed using microwave radiation, after the completion of foaming, then is placed on 160~200 DEG C
50~80min of curing is carried out in baking oven, foam is cut can obtain water-retaining property melamino-formaldehyde foam afterwards.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110066139A (en) * | 2019-05-28 | 2019-07-30 | 四川益好优科环保科技有限公司 | A kind of the radiation polycondensation melamine resin material and preparation method of high solid waste filling |
| CN110358250A (en) * | 2019-08-12 | 2019-10-22 | 成都玉龙化工有限公司 | A kind of high-moisture-retention melamine foamed plastic and preparation method thereof |
| CN110372993A (en) * | 2019-08-12 | 2019-10-25 | 成都玉龙化工有限公司 | A kind of melamine foamed plastic and preparation method thereof |
| CN110724485A (en) * | 2019-11-06 | 2020-01-24 | 徐州盛安化工科技有限公司 | Urea-formaldehyde resin adhesive and preparation method thereof |
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