CN109627483A - A kind of preparation method of melamine rigid closed-cell foam - Google Patents
A kind of preparation method of melamine rigid closed-cell foam Download PDFInfo
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- CN109627483A CN109627483A CN201811631136.7A CN201811631136A CN109627483A CN 109627483 A CN109627483 A CN 109627483A CN 201811631136 A CN201811631136 A CN 201811631136A CN 109627483 A CN109627483 A CN 109627483A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08G12/34—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds and acyclic or carbocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08J2361/30—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic and acyclic or carbocyclic compounds
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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Abstract
The invention belongs to polymeric foamed material technical field, specially a kind of preparation method of melamine rigid closed-cell foam.This method are as follows: melamine and paraformaldehyde, hydroxyl ethoxyethyl melamine, diamines pre-polymerization are first formed into Foamex, the heating such as curing agent, foaming agent, auxiliary agent is added and is prepared into melamine rigid closed-cell foam.Using melamino-formaldehyde rigid closed-cell foam material prepared by the present invention, there is the advantages that compressive strength is high, and weatherability is strong, and rate of closed hole is high, excellent fireproof performance, can be applied to air conditioning wind pipe, battenboard and external-wall heat-insulation material market.
Description
Technical field
The present invention relates to polymeric foamed material preparation technical field, specially a kind of melamine rigid closed-cell foam
Preparation method.
Background technique
The efficient of the energy utilizes the topics common for having become the whole mankind, as people's daily life, all kinds of buildings of work
Substantial amounts, every year since building heat loss causes huge energy waste, the heat preservation maintenance of building becomes people and grinds
The hot spot studied carefully.But in recent years, domestic and international building field fire takes place frequently, and the fire of especially skyscraper causes great wealth
Loss and casualties are produced, one of reason is exactly the rapid sprawling and expansion that inflammable external-wall heat-insulation material results in the intensity of a fire.
For this purpose, the Ministry of Public Security, house and town and country construction portion have successively issued No. 46 texts, No. 65 texts, a series of files such as No. 350 texts and logical
Know, the flame retardant property of External Wall thermal insulation material has made specific regulation, and the implementation of GB50016-2014 further enhances guarantor
The requirement of adiabator flame retardant property.But the property for being constrained to external-wall heat-insulation material itself, common inorganic external wall thermal-insulation material,
Although such as rock wool, glass, foamed cement flame retardant property meet national standard, bulk density and thermal coefficient are higher, are discontented with
Related request of the foot to newly-built house energy-saving heat preserving.And existing organic insulation material, such as the thermally conductive system of EPS, XPS, polyurethane
Number is lower, but is all combustible material, and can release a large amount of toxic smog in combustion, and fire can be to people when occurring
Member causes secondary injury.Although their fire retardancy all increases after adding fire retardant, over time, resistance
Combustion agent gradually loss can cause its flame retardant property to be substantially reduced.Therefore, a kind of fire-retardant and excellent thermal insulation performance is needed in the market, and
Affordable, physical property are able to satisfy the external-wall heat-insulation material of requirement again.
Melamine is often added into a variety of materials for improving the fire-retardant of product due to its excellent flame retardant property
Ability inherits this advantage by melamine resin foam prepared by melamine and formaldehyde, without adding any resistance
Combustion agent can show excellent flame retardant property.But the defect as existing for melamine resin foam and technically still
More energy are put into melamine resin open celled foam by an open question, for a long time, researcher
In research and development, and cleaning, heat preservation and acoustics adjustment field are applied it to, achieves immense success.However this foam is due to it
Percent opening is high to cause its water absorption rate excessive, its intensity is not able to satisfy the requirement of external-wall heat-insulation material in addition, thus be difficult by
Melamine resin open celled foam is applied to exterior-wall heat insulation field.In comparison, melamine closed-cell foam can be well
Meet the requirement of external-wall heat-insulation material.
The document published such as, a kind of melamine formaldehyde resin closed-cell foam disclosed in CN201210328428
Preparation method, foam obtained by this method rate of closed hole with higher and oxygen index (OI), thermal coefficient is relatively low, however it is made
Foam prepolymer resin be solid-state, need could use after the dissolution of adjusting adhesive, especially its adjusting adhesive has to be inflammable
Solvent reduces the flame retardant property of its foam to a certain extent.In addition, its performed polymer is in solid-state, to also increase its industrialized
Difficulty.The method that CN201310646482 uses etherified melamine polyimide resin in acid condition reduces the viscosity of resin, and
The toughness for improving resin using polyethylene glycol etc., also achieves beneficial effect.CN201410494905 discloses one kind with first
Alcohol is solvent, by the technical solution of carbonate-modified melamine resin, although having prepared the preferable trimerization of flame retardant property
Cyanamide hard bubble, but the technique in industrialization amplification due to the increase of the synthetic resin scale of construction, alcohols material is difficult to remove completely,
Cause foam quality unstable, while can also cause certain pollution to environment.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of preparation method of melamine rigid closed-cell foam.It adopts
The melamine formaldehyde resin closed-cell foam made from the method is not pulverized easily, and compression strength is high, strong with substrate cementitiousness, together
When foam prepolymer resin viscosity be suitable for, be easy to implement industrialization continuous production.
In order to realize the above goal of the invention, the technical solution of the present invention is as follows:
A kind of preparation method of melamine rigid closed-cell foam, method includes the following steps:
1) synthesis of melamine rigid closed-cell foam Foamex is by melamine, paraformaldehyde, hydroxyl ethoxyethyl three
Poly cyanamid and diamines are proportionally added into reaction vessel, in 70-90 DEG C of reaction to material clear, are then cooled to 60-70
Foamex is obtained after DEG C the reaction was continued 2-4h.
Preferably, the hydroxyl ethoxyethyl melamine be mono- (5- hydroxyl -3- oxapentyl) melamine of N-, N,
Bis- (5- hydroxyl -3- oxapentyl) melamines of N ' -, N, N ', appointing in N "-three (5- hydroxyl -3- oxapentyl) melamine
The mixture for one or more of anticipating.The diamines be 1,2- propane diamine, 1,3- propane diamine, Putriscine, 1,5- pentanediamine, 1,
Any one or a few mixture in 6- hexamethylene diamine.
Preferably, the molar ratio of the melamine and paraformaldehyde is 1:1.5-3.5, melamine and hydroxyl ethoxy second
The molar ratio of base melamine is 1:0.1-0.3, and the molar ratio of melamine and diamines is 1:0.05-0.2.
2) Foamex that the preparation of melamine rigid closed-cell foam obtains step 1) and surfactant, solidification
Agent, foaming agent and auxiliary agent pour into mold after mixing, and foam 15-30min at 60-80 DEG C, are further continued at 80-120 DEG C
Lower curing 2-3h, obtains melamine rigid closed-cell foam.
Preferably, the surfactant is selected from neopelex, lauryl sodium sulfate, polyoxyethylene nonyl phenyl
Any one or a few mixture in ethylene ether sodium sulfate.The curing agent be selected from formic acid, acetic acid, oxalic acid, to toluene sulphur
Acid, sulfuric acid, phosphoric acid, any one or a few the mixture in hydrochloric acid.The foaming agent be selected from pentane, pentamethylene, just oneself
Alkane, hexamethylene, any one or a few the mixture in a fluorine dichloroethanes.The auxiliary agent is selected from silicone oil, silane coupling agent
In any one or a few mixture.
Preferably, the weight ratio of the Foamex and surfactant, curing agent, foaming agent, auxiliary agent is 100:1-
10:2-6:1-8:1-10.
After using water as solvent, the melamine resin viscosity of same solid content is more compared with CN201410494905
Height causes larger puzzlement to the conveying and cloth of material in Foamex commercial process.So of the invention is basic
Thinking is in production of melamine formaldehyde resin, and the appropriate solid content for reducing resin is simultaneously dropped by hydroxyl ethoxyethyl melamine
The degree of cross linking of low melamine resin is to reduce resin viscosity；Pass through the friendship of straight diamine and melamine resin
The shortcomings that connection increases the length of crosslinking segment, and improvement closed-cell foam brittleness is larger while reducing resin viscosity, Yi Fenhua.To the greatest extent
The reduction of pipe solid content is unfavorable for the formation of closed-cell foam, but the improvement of the Combinatorial Optimization and foam process by modifying agent, still
The better melamine rigid closed-cell foam of physical property is so obtained.It should further be appreciated that water is used to avoid greatly as solvent
When batch synthetic resin alcohols material is not easy to remove completely, and melamine hard bubble unstable quality in foaming process is caused to be asked
Topic also avoids problem of environmental pollution caused by alcohols remains.
Compared with prior art, the invention has the benefit that
(1), melamine rigid closed-cell foam produced by the present invention passes through the modification to melamine resin, drop
The viscosity of low melamine resin and crosslink density so as to improve melamine formaldehyde resin closed-cell foam brittleness,
Improve the intensity of melamino-formaldehyde foam.
(2), by the improvement of technique, the viscosity of melamine rigid closed-cell foam Foamex is significantly reduced, favorably
Material conveying and cloth foaming process during continuous production, while simplifying the synthesis of melamine resin
Journey is easier to realize being prepared on a large scale for resin, to realize industrialization.Melamine hard bubble obtained does not fall through the invention
Powder, caking property is strong, can be used in combination with a variety of materials such as metal, non-woven fabrics, cement.
(3), the water absorption rate and thermal coefficient of foam can be effectively reduced in high rate of closed hole, to allow to be applied to sky
Adjust air hose, battenboard and building exterior wall heat preserving market.
Specific embodiment
In order to make the contents of the present invention easily facilitate understanding, below in conjunction with specific embodiment to heretofore described
Technique is further elaborated, and the present invention is not limited to this or is limited.Technical staff in the field can be according to institute
It states summary of the invention and makes some nonessential modifications and adaptations and implemented, but this should not be interpreted as to the above-mentioned theme of the present invention
Range is only limitted to following embodiments.
Comparative example 1:
It is prepared using method in CN201410494905, i.e., by 252g melamine, 50.4g benzoguanamine,
205g paraformaldehyde, 40g hydroxyl ethoxyethyl melamine and 145g methanol are added in glass flask of the 1L with stirring, open stirring
Material is uniformly mixed, is adjusted material pH value to 9.5 or so using potassium hydroxide, reaction to material is clarified under 75 DEG C of water-baths
It is transparent, 25g dimethyl carbonate is added, opens vacuum removal methanol after the reaction was continued 1h, obtains 130g distillate, 63.5g is added and goes
Ionized water adjusts resin solid content to 88%, resin viscosity 78000mpa.s (25 DEG C), and cooling is spare.This method is due to resin
Viscosity is excessive, so being only used for the foam of preparation sample.
Take resin 100g and surfactant sodium dodecyl base benzene sulfonic acid sodium salt 1.5g, curing agent p-methyl benzenesulfonic acid 5g, foaming
Agent pentane 5g, auxiliary agent FQ-5503 (Jiangsu Maysta Chemical Co., Ltd.) 3g Forced Mixing at 1200rpm is uniform,
It pours into preprepared mold, is transferred at 100 DEG C after being put into 70 DEG C of baking ovens the 15min that foams and solidifies 2h, obtain foam
MF1。
Embodiment 1:
By 252g melamine, 75.6g hydroxyl ethoxyethyl melamine, 194.4g paraformaldehyde, 23.2g hexamethylene diamine and
134.9g water is added in the glass flask of 1L band stirring, opens to stir and is uniformly mixed material, using triethylamine by material PH tune
It is whole to 9.5 or so, reaction is to after material clear, being cooled to 70 DEG C the reaction was continued 4h under 90 DEG C of water-baths.Resin solid content
80%, viscosity 12500mpa.s (25 DEG C), cooling are spare.
Take resin 100g and surfactant sodium dodecyl base benzene sulfonic acid sodium salt 1.5g, curing agent p-methyl benzenesulfonic acid 5g, foaming
Agent pentane 5g, auxiliary agent FQ-5503 (Jiangsu Maysta Chemical Co., Ltd.) 3g Forced Mixing at 1200rpm is uniform,
It pours into preprepared mold, is transferred at 100 DEG C after being put into 70 DEG C of baking ovens the 15min that foams and solidifies 2h, obtain foam
MF2。
Embodiment 2:
By 252g melamine, 50.4g hydroxyl ethoxyethyl melamine, 189.4g paraformaldehyde, 23.2g hexamethylene diamine and
128.7g water is added in the glass flask of 1L band stirring, opens to stir and is uniformly mixed material, using triethylamine by material PH tune
It is whole to 9.5 or so, reaction is to after material clear, being cooled to 70 DEG C the reaction was continued 4h under 90 DEG C of water-baths.Resin solid content
80%, viscosity 13000mpa.s (25 DEG C), cooling are spare.
Take resin 100g and surfactant sodium dodecyl base benzene sulfonic acid sodium salt 1.5g, curing agent phosphoric acid (85%) 5g, foaming
Agent pentane 5g, silane coupling agent KBE-403 (chemistry organosilicon Co., Ltd, SHIN-ETSU HANTOTAI) 3g Forced Mixing at 1200rpm is equal
It is even, it pours into preprepared mold, is transferred at 100 DEG C after being put into 70 DEG C of baking ovens the 15min that foams and solidifies 2h, steeped
Foam MF3.
Embodiment 3:
By 252g melamine, 25.2g hydroxyl ethoxyethyl melamine, 184.8g paraformaldehyde, 17.6g butanediamine and
119.9g water is added in the glass flask of 1L band stirring, opens to stir and is uniformly mixed material, using diethanol amine by material PH
It adjusts to 9.5 or so, reaction is to after material clear, being cooled to 70 DEG C the reaction was continued 4h under 90 DEG C of water-baths.Resin contains admittedly
80%, viscosity 13700mpa.s (25 DEG C) are measured, cooling is spare.
Take resin 100g and surfactant nonylphenol polyoxyethylene ether sulfate 1.5g, curing agent sulfuric acid (65%)
5g, foaming agent pentamethylene 5g, silane coupling agent KBE-402 (chemistry organosilicon Co., Ltd, SHIN-ETSU HANTOTAI) 3g is forced at 1200rpm
It is uniformly mixed, pours into preprepared mold, be transferred at 100 DEG C after being put into 70 DEG C of baking ovens the 15min that foams and solidify 2h,
Obtain foam MF4.
Embodiment 4:
By 5040g melamine, 504g hydroxyl ethoxyethyl melamine, 3788g paraformaldehyde, 464g hexamethylene diamine and
2574g water is added in the glass flask of 20L band stirring, opens to stir and is uniformly mixed material, using sodium hydroxide by material PH
It adjusts to 9.5 or so, after being warming up to 90 DEG C by material using heating mantle and keep the temperature to material clear, is cooled to 70
DEG C the reaction was continued 3h.Resin solid content 80%, viscosity 14300mpa.s (25 DEG C), cooling are spare.
Take resin 500g and surfactant nonylphenol polyoxyethylene ether sulfate 7.5g, curing agent formic acid (88%)
25g, foaming agent pentane 25g, auxiliary agent phenol formaldehyde foam silicone oil FQ-5502 (Jiangsu Maysta Chemical Co., Ltd.) 15g exist
Forced Mixing is uniform under 1200rpm, pours into preprepared mold, is transferred to after being put into 70 DEG C of baking ovens the 15min that foams
Solidify 2h at 100 DEG C, obtains foam MF5.
Embodiment 5:
By 75.6kg melamine, 15.1kg hydroxyl ethoxyethyl melamine, 56.8kg paraformaldehyde, 7.0kg hexamethylene diamine
It is added in 200L planet reaction kettle with 38.6kg water, opens stirring and be uniformly mixed material, adjusted material PH using triethylamine
To 9.5 or so, material is heated to 90 DEG C or so, after isothermal reaction to material clear using conduction oil, is cooled to 70 DEG C
The reaction was continued 3h.Resin solid content 80%, viscosity 15100mpa.s (25 DEG C), cooling are spare.
Take resin 1000g and surfactant nonylphenol polyoxyethylene ether sulfate 15g, curing agent formic acid (88%)
50g, foaming agent n-hexane 50g, auxiliary agent phenol formaldehyde foam silicone oil FQ-5502 (Jiangsu Maysta Chemical Co., Ltd.) 30g exist
Forced Mixing is uniform under 600rpm, pours into preprepared mold, is transferred to after being put into 70 DEG C of baking ovens the 15min that foams
Solidify 2h at 100 DEG C, obtains foam MF6.
Then by comparative example 1 and embodiment 1, into embodiment 5, obtained foam is tested according to standard.Test
The result is as follows:
| Project | Unit | MF1 | MF2 | MF3 | MF4 | MF5 | MF6 |
| Density | kg/m3 | 41 | 40 | 40 | 42 | 40 | 41 |
| Thermal coefficient | w/m·k | 0.031 | 0.029 | 0.028 | 0.029 | 0.031 | 0.030 |
| Compression performance | kpa | 210 | 217 | 227 | 219 | 230 | 235 |
| Volume water absorption rate | % | 2.3 | 2.2 | 1.2 | 1.6 | 1.6 | 1.7 |
| Picking rate | % | 5.3 | 3.5 | 4.1 | 4.4 | 4.1 | 3.9 |
| Dimensional stability | % | 1.2 | 1.9 | 1.5 | 1.2 | 1.4 | 1.2 |
Density is tested according to GB/T6343-2009；
Thermal coefficient is tested according to GB/T10294-2008 Technology of Steady State Thermal Resistance of Thermal Insulating Material；
Compressive strength is tested according to GB/T15048-1994 rigid foam compression creep test method；
Volume water absorption rate is according to GB/T8810-2005 rigid foam water absorption rate test；
The test of dimensional stability GB/T8811-2008 rigid foam dimensional stability test method.
Counterweight of the picking rate by the application 200g on the sample block of 60mm*60mm*30mm, the mobile 5m on 100# sand paper
(100mm*50 times) is tested.
From the above data, there is lower viscosity by resin produced by the present invention, is easier to realize industrialization, by the tree
Foam rate of closed hole made from rouge is high, and excellent thermal insulation performance is suitable as thermal insulation material.
It is elaborated although the present invention has passed through specific embodiment, this profession ordinary skill
Personnel should be understood that made on this basis without departing from any form of claims and the variation of details,
Belong to invention which is intended to be protected.
Claims (9)
1. a kind of preparation method of melamine rigid closed-cell foam, it is characterised in that method includes the following steps:
1) synthesis of melamine rigid closed-cell foam Foamex
Melamine, paraformaldehyde, hydroxyl ethoxyethyl melamine and diamines are proportionally added into reaction vessel, in 70-90
DEG C reaction obtains Foamex after being then cooled to 60-70 DEG C the reaction was continued 2-4h to material clear；
2) preparation of melamine rigid closed-cell foam
Foamex and surfactant, curing agent, foaming agent and auxiliary agent that step 1) obtains are poured into mold after mixing
In, foam 15-30min at 60-80 DEG C, is further continued for curing 2-3h at 80-120 DEG C, obtains melamine rigid closed cell bubble
Foam.
2. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the hydroxyl ethoxyethyl
Melamine is mono- (5- hydroxyl -3- oxapentyl) melamine of N-, N, N '-bis- (5- hydroxyl -3- oxapentyl) melamines,
N, N ', any one or a few the mixture in N ' '-three (5- hydroxyl -3- oxapentyl) melamine.
3. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the diamines is 1,2-
Propane diamine, 1,3- propane diamine, Putriscine, 1,5- pentanediamine, any one or a few the mixture in 1,6- hexamethylene diamine.
4. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the surfactant
Any one or a few in neopelex, lauryl sodium sulfate, nonylphenol polyoxyethylene ether sulfate
Mixture.
5. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the curing agent is selected from
Formic acid, acetic acid, oxalic acid, p-methyl benzenesulfonic acid, sulfuric acid, phosphoric acid, any one or a few the mixture in hydrochloric acid.
6. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the foaming agent is selected from
Pentane, pentamethylene, n-hexane, hexamethylene, any one or a few the mixture in a fluorine dichloroethanes.
7. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the auxiliary agent is selected from silicon
Any one or a few mixture in oil, silane coupling agent.
8. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the melamine with
The molar ratio of paraformaldehyde is 1:1.5-3.5, and the molar ratio of melamine and hydroxyl ethoxyethyl melamine is 1:0.1-0.3,
The molar ratio of melamine and diamines is 1:0.05-0.2.
9. the preparation method of melamine rigid closed-cell foam described in claim 1, it is characterised in that: the Foamex with
Surfactant, curing agent, foaming agent, auxiliary agent weight ratio be 100:1-10:2-6:1-8:1-10.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114573774A (en) * | 2022-03-03 | 2022-06-03 | 李慧芬 | Melamine hard bubble closed-cell material and preparation method and application thereof |
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| CN106832164A (en) * | 2017-02-27 | 2017-06-13 | 天津市居安泰科技有限公司 | A kind of rigid foam preparation method of tripolycyanamide amino resin |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3512446A1 (en) * | 1985-04-04 | 1986-10-16 | Cassella Ag, 6000 Frankfurt | MODIFIED MELAMINE RESIN, ITS PRODUCTION AND USE, AND THE MODIFIER |
| CN104250386A (en) * | 2014-09-25 | 2014-12-31 | 四川金象赛瑞化工股份有限公司 | Preparation method of flame-retardant melamine hard foam |
| CN106832164A (en) * | 2017-02-27 | 2017-06-13 | 天津市居安泰科技有限公司 | A kind of rigid foam preparation method of tripolycyanamide amino resin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114573774A (en) * | 2022-03-03 | 2022-06-03 | 李慧芬 | Melamine hard bubble closed-cell material and preparation method and application thereof |
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