CN106146402A - The preparation method of a kind of 2 imidazolidinones and formaldehyde scavenger - Google Patents
The preparation method of a kind of 2 imidazolidinones and formaldehyde scavenger Download PDFInfo
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- CN106146402A CN106146402A CN201610553057.3A CN201610553057A CN106146402A CN 106146402 A CN106146402 A CN 106146402A CN 201610553057 A CN201610553057 A CN 201610553057A CN 106146402 A CN106146402 A CN 106146402A
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- Prior art keywords
- formaldehyde
- imidazolidinone
- carbamide
- formaldehyde scavenger
- speed
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/04—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D233/28—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D233/30—Oxygen or sulfur atoms
- C07D233/32—One oxygen atom
- C07D233/34—Ethylene-urea
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Abstract
Embodiment of the present invention discloses a kind of formaldehyde scavenger, it is applicable to spary and soft cloth brushing covers on the surface of furniture, door and window and leatherware, and can be the most internal, effectively stop and remove free formaldehyde, thus remove the formaldehyde in goods, improve the physical safety of user, including component: 2 imidazolidinones that Claims 1 to 5 is made, carbamide, wetting agent, auxiliary agent, water, mix.Embodiment of the present invention additionally provides the preparation method of a kind of 2 imidazolidinones, comprise the following steps: A, ethylenediamine, carbamide, ethylene glycol and water are added in reactor according to ratio that mol ratio is 1.4～1.5:1:0.5～0.8:1.5～2, it is stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to 0 DEG C；B, filter after taking precipitate, described precipitate is used absolute ethanol washing, then through purification and be dried to obtain 2 imidazolidinones.
Description
Technical field
The present invention relates to remove formaldehyde field, particularly relate to preparation method and the formaldehyde scavenger of a kind of 2-imidazolidinone.
Background technology
Formaldehyde chemical formula is HCHO, is colourless gas at normal temperatures, has special penetrating odor, due to the change that it is special
Learn performance, chemical industry and fur coat industry use in a large number.
Industrially, as the binding agents such as urea-formaldehyde resin adhesive, melamine resin adehsive and phenolic resin glue all using formaldehyde as
Primary raw material, and these binding agents are widely used in the production of the sheet materials such as plywood, Blockboard and density board.So
Outward, the metope of building, ground, the finishing of furniture and auxiliary equipment will use this kind of binding agent.
In fur coat industry, formaldehyde tanning agent is a kind of widely used post-treatment agent, and the leather colour purity that can make leather is white, meets light
Invariant color, and absorption of perspiration is strong, and in these products, the free formaldehyde of residual can slowly discharge, and release process is even up to more than ten
Year.
Having many uses of formaldehyde is general, but harm is very big, and the especially harm to human body, formaldehyde in air content exceedes
0.1mg/m3Time, people just can smell a strange smell and not feel well, when content of formaldehyde is more than 0.5mg/m3Time, eyes can be felt to stimulate
Sense, causes simultaneously and sheds tears, when concentration is higher, can cause headache, feel sick, cough, vomit, uncomfortable in chest and tachypnea etc., seriously can be instead
Answer too drastic and cause death.Long Term Contact formaldehyde, human body constitution is easily deteriorated, and immunity degradation causes headache and insomnia etc., seriously
Lesion tissue and cancer can be caused.
In the world, 2004 international cancer mechanism (IRAC) formaldehyde has been included in first kind carcinogen and teratogen
Matter, it is indicated that nasopharyngeal carcinoma, tumor of nasal cavity, nasal sinus cancer and leukemia may be caused.
Summary of the invention
Embodiment of the present invention provides a kind of formaldehyde scavenger, it is adaptable to spary and soft cloth brushing cover at furniture, door
Window and the surface of leatherware, and can be the most internal, effectively stop and remove free formaldehyde, thus removing the first in goods
Aldehyde, improves the physical safety of user.
Embodiment of the present invention additionally provides the preparation method of a kind of 2-imidazolidinone.
For solving the problems referred to above, the preparation method of a kind of 2-imidazolidinone that the present invention provides, comprise the following steps:
A, by ethylenediamine, carbamide, ethylene glycol and water according to the ratio that mol ratio is 1.4～1.5:1:0.5～0.8:1.5～2
Example adds in reactor, is stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to 0 DEG C；
B, filter after taking precipitate, described precipitate is used absolute ethanol washing, then through purification and be dried to obtain 2-
Imidazolidinone.
Preferably, described in step A, the heating rate of heating is 6 DEG C/min.
Preferably, described in step A, the speed of stirring is 300～600rpm.
Preferably, the mol ratio described in step A be ethylenediamine, carbamide, ethylene glycol and water according to mol ratio be 1.4～
1.5:1:0.5:1.5.
Preferably, in step A, described in be stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to
0 DEG C, particularly as follows:
It is stirred at room temperature to uniformly with speed for 400rpm；
It is that 6 DEG C/min is heated to 150 DEG C with heating rate, continues to stir 50 minutes for 500rpm with speed；
It is that 6 DEG C/min is heated to 230 DEG C with heating rate.Continue to stir 140 minutes with speed for 400rpm；
Slowly cool to 0 DEG C.
The present invention also provides for a kind of formaldehyde scavenger, including component: the 2-imidazolidinone be made up of above-mentioned, carbamide, moistening
Agent, auxiliary agent, water, mix.
Preferably, described 2-imidazolidinone, described carbamide, described wetting agent, described auxiliary agent, the weight ratio of described water
For: 1～20 part: 1～20 part: 0.1～5 part: 0.1～10 part: 40～85 parts.
Preferably, described wetting agent is OP series emulsifying agent or NP series emulsifying agent.
Preferably, the mixture of one or more during described emulsifying agent is alkylphenol polyoxyethylene.
Preferably, one or more during described auxiliary agent is calcium chloride, barium chloride and magnesium chloride.
As can be seen from the above technical solutions, embodiment of the present invention has the advantage that 2-imidazolidinone has second two
The advantage of amine, ethylene glycol and carbamide, utilize this 2-imidazolidinone and carbamide as the formaldehyde scavenger of effective ingredient, can be with free
Formaldehyde produces chemical reaction, and 2-imidazolidinone and carbamide can react with formaldehyde, the polymer that production stability is high, prevent
Back reaction, causes the spilling of formaldehyde, thus reaches to remove the effect of formaldehyde.
Further, this formaldehyde scavenger uses alkylphenol polyoxyethylene as emulsifying agent i.e. wetting agent so that this first
The various compositions of aldehyde scavenger can form stable aqueous solvent by dispersing and dissolving in aqueous so that the cleaning agent of this formaldehyde is permissible
It is fully contacted with furniture, door and window, leather etc., and penetrates into gap, remove and there is the free formaldehyde in gap.
Further, the 2-imidazolidinone of the present invention and the preparation process of formaldehyde scavenger are simple, and the response time is short, adopts
Preparing 2-imidazolidinone with ethylenediamine, carbamide, ethylene glycol and water as raw material, 2-imidazolidinone and carbamide, wetting agent, auxiliary agent are molten
In Xie Shui, form the aqueous solution of safety non-toxic, safe operation process, suitably promote the use of.
Detailed description of the invention
Embodiment of the present invention provides a kind of formaldehyde scavenger, it is adaptable to spary and soft cloth brushing cover at furniture, door
Window and the surface of leatherware, and can be the most internal, effectively stop and remove free formaldehyde, thus removing the first in goods
Aldehyde, improves the physical safety of user.
Embodiment of the present invention additionally provides the preparation method of a kind of 2-imidazolidinone.
The preparation method of a kind of 2-imidazolidinone that the present invention provides, comprises the following steps:
A, by ethylenediamine, carbamide, ethylene glycol and water according to the ratio that mol ratio is 1.4～1.5:1:0.5～0.8:1.5～2
Example adds in reactor, is stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to 0 DEG C；
B, filter after taking precipitate, described precipitate is used absolute ethanol washing, then through purification and be dried to obtain 2-
Imidazolidinone.
Wherein alleged continuously stirred, can be continuously stirred after raw material addition reactor, heating process is the most persistently stirred
Mix.
Preferably, described in step A, the heating rate of heating is 6 DEG C/min.
Preferably, described in step A, the speed of stirring is 300～600rpm.
Preferably, the mol ratio described in step A be ethylenediamine, carbamide, ethylene glycol and water according to mol ratio be 1.4～
1.5:1:0.5:1.5.
Preferably, in step A, described in be stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to
0 DEG C, particularly as follows:
It is stirred at room temperature to uniformly with speed for 400rpm；
It is that 6 DEG C/min is heated to 150 DEG C with heating rate, continues to stir 50 minutes for 500rpm with speed；
It is that 6 DEG C/min is heated to 230 DEG C with heating rate.Continue to stir 140 minutes with speed for 400rpm；
Slowly cool to 0 DEG C.
The preparation method of this 2-imidazolidinone be briefly described below:
Take ethylenediamine, carbamide, ethylene glycol and water that mol ratio is 1.4～1.5:1:0.5～0.8:1.5～2 and add reaction
In ware, after stirring with the speed of 300～600rpm, be heated up to 120～250 DEG C with the speed of 6 DEG C/min, and continue with
The speed of 300～600rpm stirs 2～4 hours, is subsequently cooled to 0 DEG C.
Wherein, add the raw material in reaction utensil, after stirring with the speed of 400rpm, heat with the speed of 6 DEG C/min
To 150 DEG C, continuously stirred, it is heated up to 230 DEG C with the speed of 6 DEG C/min the most again, continuously stirred.
The 2-imidazolidinone prepared by the method, it is ensured that the component of the formaldehyde scavenger then prepared is adaptive, only
Use the material being beneficial to remove formaldehyde, such as carbamide, do not introduce other materials, in order to avoid destroying stablizing of formaldehyde scavenger of the present invention
Property.
Present invention also offers a kind of formaldehyde scavenger formaldehyde scavenger, including component: by the above-mentioned 2-imidazolidine made
Ketone, carbamide, wetting agent, auxiliary agent, water, mix.
Preferably, described 2-imidazolidinone, described carbamide, described wetting agent, described auxiliary agent, the weight ratio of described water
For: 1～20 part: 1～20 part: 0.1～5 part: 0.1～10 part: 40～85 parts.
Preferably, described wetting agent is OP series emulsifying agent or NP series emulsifying agent.
Preferably, the mixture of one or more during described emulsifying agent is alkylphenol polyoxyethylene.
Preferably, one or more during described auxiliary agent is calcium chloride, barium chloride and magnesium chloride.
Formaldehyde scavenger of the present invention employs the 2-imidazolidinone being made up of ethylenediamine, carbamide, ethylene glycol, also uses breast
The carbamide that agent, auxiliary agent and reinforcement use, is prepared by fully mixing, and wherein plays the mainly 2-imidazolidinone removing formaldehyde effect
And carbamide.
Preferably, 2-imidazolidinone, carbamide, wetting agent, auxiliary agent, water weight ratio be preferably: 10～20 parts: 10～
20 parts: 0.1～2 part: 0.1～2 part: 40～85 parts.
In general, the product such as furniture, leather is cleaned the chemical substance used, it is impossible to furniture and the surface of leather
Cause damage, and the abutting relationship at furniture and leather products Present site and position, the more difficult removing of formaldehyde of closed position.
The 2-imidazolidinone of the present invention and carbamide have the strongest stability to free formaldehyde, when 2-imidazolidinone, carbamide with
After formaldehyde contact, chemical reaction can be produced, reach to remove the effect of formaldehyde, and 2-imidazolidinone, carbamide and formaldehyde can be formed
There is the polymer of superregulated property, prevent the generation of back reaction, so that the spilling of formaldehyde.
Furthermore, it is understood that this formaldehyde scavenger also uses the wetting agent with emulsification function--alkylphenol-polyethenoxy
Ether so that in formaldehyde scavenger various compositions can dispersing and dissolving in aqueous, and form stable aqueous solution so that formaldehyde is clear
Except agent can be fully contacted with furniture, door and window and leather etc., infiltrate through in their inside and the gap at position and position.
It should be noted that the formaldehyde removing that product is carried out by the present invention, the detection method of clearance rate is:
Take polylith test density plate, cut, take blank sample and spray formaldehyde scavenger test specimens, being placed in Laboratory Module, put
After putting 6 hours, the air in sampling closed cabin, as sample, detects its concentration of formaldehyde, and the burst size of methanal of blank sample is C1, spray
The burst size of methanal of the test specimens being coated with formaldehyde scavenger is C2, measures according to the mode of P=(C1-C2)/C1 × 100%.
Wherein, formula represents:
P: formaldehyde clearance, %；
C1: the burst size of methanal of blank sample, mg/m3；
C2: the burst size of methanal of the test specimens of spraying formaldehyde scavenger, mg/m3；
Below by embodiment, prepared by the present invention 2-imidazolidinone to be described in detail:
Embodiment 1
Taking mol ratio is: the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and water, is placed in reaction utensil, with
300rpm stirs, and is then heated to 180 DEG C with the speed of 6 DEG C/min and persistently keeps the speed of 300rpm to stir,
Continue react for 3 hours, be cooled to 0 DEG C, filtration, after absolute ethanol washing, purification, obtain 2-imidazolidinone after drying.
Embodiment 2
Taking mol ratio is: the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and water, is placed in reaction utensil, with
300rpm stirs, and is then heated to 180 DEG C with the speed of 6 DEG C/min and persistently keeps the speed of 400rpm to stir,
Continue react for 3 hours, be cooled to 0 DEG C, filtration, after absolute ethanol washing, purification, obtain 2-imidazolidinone after drying.
Embodiment 3
Taking mol ratio is: the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and water, is placed in reaction utensil, with
300rpm stirs, and is then heated to 180 DEG C with the speed of 6 DEG C/min and persistently keeps the speed of 500rpm to stir,
Continue react for 3 hours, be cooled to 0 DEG C, filtration, after absolute ethanol washing, purification, obtain 2-imidazolidinone after drying.
Embodiment 4
Taking mol ratio is: the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and water, is placed in reaction utensil, with
300rpm stirs, and is then heated to 180 DEG C with the speed of 6 DEG C/min and persistently keeps the speed of 600rpm to stir,
Continue react for 3 hours, be cooled to 0 DEG C, filtration, after absolute ethanol washing, purification, obtain 2-imidazolidinone after drying.
Example 1～the 2-imidazolidinone 5g of embodiment 4, put in a, b, c, d4 reaction utensil respectively, all adds: urine
Element 1g, wetting agent 0.1g, auxiliary agent 0.1g, water 40g, obtain formaldehyde scavenger a, formaldehyde scavenger b, formaldehyde scavenger c, formaldehyde clear
Except agent d.
The purpose taking a small amount of carbamide, wetting agent and auxiliary agent is to reduce the shadow that carbamide, wetting agent and auxiliary agent PARA FORMALDEHYDE PRILLS(91,95) absorb
Ring, thus embody the dosage of 2-imidazolidinone more easily.
Taking one piece of density board, be divided into 4 fritters, and cut from centre, one-tenth 4 is little to density board test board, as Form aldehyde release
Amount, is sprayed at 4 little in density board by formaldehyde scavenger a, formaldehyde scavenger b, formaldehyde scavenger c, formaldehyde scavenger d correspondence,
Fountain height is identical, and after air-drying 24 hours, 4 to putting into different experiments cabin, takes out after 6 hours, and the formaldehyde testing each Laboratory Module is released
High-volume.
Release result be embodiment 1 be 0.25mg/m3, embodiment 2 be 0.21mg/m3, embodiment 3 be 0.22mg/m3, real
Execute example 4 for 0.27mg/m3。
Visible, the effect of embodiment 2 and embodiment 3 is better than embodiment 1 and embodiment 4.
The 2-imidazolidinone that the preparation method of Example 2 obtains is as the basis of example below.
Below the embodiment of the formaldehyde scavenger of the present invention is described in detail:
Embodiment 5
Take 2-imidazolidinone 10g, carbamide 10g, alkylphenol polyoxyethylene (NP-10) 0.5g, calcium oxide 0.5g, water 79g,
Stirring, to being completely dissolved, obtains formaldehyde scavenger e.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate e, plate i1.
Being sprayed on plate e by formaldehyde scavenger e, spray pattern is the two sides of plate and four limits are the most uniformly sprayed and covered
Lid, quantity for spray is 30mL/m2；Plate i1 does not spray any material.
Plate e and plate i1 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate e, plate i1 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i1 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 1.
Embodiment 6
Take 2-imidazolidinone 15g, carbamide 10g, alkylphenol polyoxyethylene (NP-10) 1g, calcium oxide 1g, water 73g, stirring
To being completely dissolved, obtain formaldehyde scavenger f.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate f, plate i2.Being sprayed on plate f by formaldehyde scavenger f, spray pattern is two sides and four limits of plate
All uniformly spraying covering, quantity for spray is 30mL/m2；Plate i2 does not spray any material.
Plate f and plate i2 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate f, plate i2 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i2 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 1.
Embodiment 7
Take 2-imidazolidinone 10g, carbamide 20g, alkylphenol polyoxyethylene (NP-10) 1g, calcium oxide 0.5g, water 68.5g,
Stirring, to being completely dissolved, obtains formaldehyde scavenger g.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate g, plate i3.Being sprayed on plate g by formaldehyde scavenger g, spray pattern is two sides and four limits of plate
All uniformly spraying covering, quantity for spray is 30mL/m2；Plate i3 does not spray any material.
Plate g and plate i3 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate g, plate i3 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i3 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 1.
Embodiment 8
Take 2-imidazolidinone 10g, carbamide 5g, alkylphenol polyoxyethylene (NP-10) 0.5, calcium oxide 1g, water 83.5g, stir
Mix to being completely dissolved, obtain formaldehyde scavenger h.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate h, plate i4.Being sprayed on plate h by formaldehyde scavenger h, spray pattern is two sides and four limits of plate
All uniformly spraying covering, quantity for spray is 30mL/m2；Plate i4 does not spray any material.
Plate h and plate i4 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate h, plate i4 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i4 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 1.
Form 1
As can be seen from the above table, P optimal value is to occur in the formaldehyde scavenger f that embodiment 7 prepares, and embodiment 5 prepares
Formaldehyde scavenger e takes second place.
By upper table it can also be seen that, the formaldehyde scavenger of the embodiment of the present invention 5～8 goes effect of formaldehyde very for sheet material
Good.
Sprinkling, spary, the mode smeared is used to cover on furniture, door and window and leatherware surface, in the effect of wetting agent
Under, launching rapidly at body surface, 2-imidazolidinone, carbamide can react rapidly with formaldehyde simultaneously, and under interacting, reaction
The stability of thing is high, effectively prevents the generation of back reaction, is a kind of efficient and the formaldehyde scavenger removing formaldehyde of safety.
On the basis of embodiment 1～embodiment 8, study the optimum preparation side of 2-imidazolidinone of the present invention the most meticulously
Case:
Embodiment 9
Consistent with the raw material quantity of embodiment 2, take mol ratio be the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and
Water, is placed in reaction utensil, and difference is:
Stir with 300rpm, be then heated to 150 DEG C with the speed of 6 DEG C/min and persistently keep 400rpm's
Speed stirs, and continues react for 190 minutes, is cooled to 0 DEG C, and filtration, after absolute ethanol washing, purification, obtains after drying
2-imidazolidinone.
Mix consistent with embodiment 7 content: 2-imidazolidinone 10g, carbamide 20g, alkylphenol polyoxyethylene (NP-10)
1g, calcium oxide 0.5g, water 68.5g, stirring, to being completely dissolved, obtains formaldehyde scavenger j.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate j, plate i5.Being sprayed on plate j by formaldehyde scavenger j, spray pattern is two sides and four limits of plate
All uniformly spraying covering, quantity for spray is 30mL/m2；Plate i5 does not spray any material.
Plate j and plate i5 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate j, plate i5 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i5 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 2.
Embodiment 10
Consistent with the raw material quantity of embodiment 2, take mol ratio be the ethylenediamine of 1.4:1:0.5:1.5, carbamide, ethylene glycol and
Water, is placed in reaction utensil, and difference is:
It is stirred at room temperature to uniformly with speed for 400rpm；
It is that 6 DEG C/min is heated to 150 DEG C with heating rate, continues to stir 50 minutes for 500rpm with speed；
It is that 6 DEG C/min is heated to 230 DEG C with heating rate.Continue to stir 140 minutes with speed for 400rpm；
Slowly cool to 0 DEG C；
Filter, after absolute ethanol washing, purification, obtain 2-imidazolidinone after drying.
Mix consistent with embodiment 7 content: 2-imidazolidinone 10g, carbamide 20g, alkylphenol polyoxyethylene (NP-10)
1, calcium oxide 0.5g, water 68.5g, stirring, to being completely dissolved, obtains formaldehyde scavenger k.
Carry out experimental verification:
Taking a length of 100cm, width is the vegetarian noodles density board of 50cm, cuts from centre, and cleaning is clean in the same way,
The most numbered: plate k, plate i6.Being sprayed on plate k by formaldehyde scavenger k, spray pattern is two sides and four limits of plate
All uniformly spraying covering, quantity for spray is 30mL/m2；Plate i6 does not spray any material.
Plate k and plate i6 is placed in same environment and air-dries 24 hours, fetch the Form aldehyde release starting to test them
Amount.
Plate k, plate i6 are respectively placed in the Laboratory Module of 21 cubic metre, close hatch door.After 6 hours, gather experiment
Air sample in cabin, the concentration of formaldehyde of monitoring sample, the Laboratory Module residing for plate i6 obtains the burst size of methanal C1 of blank sample, spray
It is coated with the burst size of methanal C2 of the test specimens of formaldehyde scavenger, owing to the difference that may relate to is less, therefore measures to arithmetic point
Three.
According to above-mentioned calculation P=(C1-C2)/C1 × 100%, calculate formaldehyde clearance, after result such as embodiment
Shown in form 2.
Form 2
Visible, the formaldehyde scavenger effect being worth by embodiment 10 is optimum.
The above, embodiment of above and embodiment only in order to technical scheme to be described, are not intended to limit；
Although being described in detail the present invention with reference to aforementioned embodiments and embodiment, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to wherein portion of techniques feature
Carry out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from each embodiment of the present invention
Spirit and scope with embodiment technical scheme.
Claims (10)
1. the preparation method of a 2-imidazolidinone, it is characterised in that comprise the following steps:
A, ethylenediamine, carbamide, ethylene glycol and water are added according to the ratio that mol ratio is 1.4～1.5:1:0.5～0.8:1.5～2
Enter in reactor, be stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to 0 DEG C；
B, filter after taking precipitate, described precipitate is used absolute ethanol washing, then through purification and be dried to obtain 2-imidazoles
Alkanone.
The preparation method of 2-imidazolidinone the most according to claim 1, it is characterised in that the liter of heating described in step A
Temperature speed is 6 DEG C/min.
The preparation method of 2-imidazolidinone the most according to claim 1, it is characterised in that the speed of stirring described in step A
Rate is 300～600rpm.
4. according to the preparation method of the 2-imidazolidinone described in any one in claims 1 to 3, it is characterised in that in step A
Described mol ratio be ethylenediamine, carbamide, ethylene glycol and water be 1.4～1.5:1:0.5:1.5 according to mol ratio.
5. according to the preparation method of the 2-imidazolidinone described in any one in claims 1 to 3, it is characterised in that step A
In, described in be stirred until homogeneous, be heated to 120～250 DEG C continuously stirred 2～4 hours, be cooled to 0 DEG C, particularly as follows:
It is stirred at room temperature to uniformly with speed for 400rpm；
It is that 6 DEG C/min is heated to 150 DEG C with heating rate, continues to stir 50 minutes for 500rpm with speed；
It is that 6 DEG C/min is heated to 230 DEG C with heating rate.Continue to stir 140 minutes with speed for 400rpm；
Slowly cool to 0 DEG C.
6. a formaldehyde scavenger, it is characterised in that include component: the 2-imidazolidine being made up of Claims 1 to 5 any one
Ketone, carbamide, wetting agent, auxiliary agent, water, mix.
Formaldehyde scavenger the most according to claim 6, it is characterised in that described 2-imidazolidinone, described carbamide, described profit
Humectant, described auxiliary agent, the weight ratio of described water be: 1～20 part: 1～20 part: 0.1～5 part: 0.1～10 part: 40～85
Part.
Formaldehyde scavenger the most according to claim 6, it is characterised in that described wetting agent is OP series emulsifying agent or NP system
Row emulsifying agent.
Formaldehyde scavenger the most according to claim 8, it is characterised in that described emulsifying agent is in alkylphenol polyoxyethylene
The mixture of one or more.
10. according to the formaldehyde scavenger described in any one in claim 6～9, it is characterised in that described auxiliary agent is chlorination
One or more in calcium, barium chloride and magnesium chloride.
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