CN102898778B - Preparation method for melamine formaldehyde resin closed-cell foam - Google Patents

Preparation method for melamine formaldehyde resin closed-cell foam Download PDF

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Publication number
CN102898778B
CN102898778B CN201210328428.XA CN201210328428A CN102898778B CN 102898778 B CN102898778 B CN 102898778B CN 201210328428 A CN201210328428 A CN 201210328428A CN 102898778 B CN102898778 B CN 102898778B
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Prior art keywords
foam
grams
terpolycyantoamino
formaldehyde resin
closed
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CN201210328428.XA
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Chinese (zh)
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CN102898778A (en
Inventor
杨斌峰
朱国清
沈铁清
马立新
姚尧
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NANTONG ZIXIN INDUSTRIAL CO LTD
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NANTONG ZIXIN INDUSTRIAL CO LTD
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Abstract

The present invention discloses a preparation method for melamine formaldehyde resin closed-cell foam. The preparation method comprises the following steps: introducing a modifier to a melamine formaldehyde resin synthesis process to carry out copolymerization, and carrying out a dehydration treatment on the synthesized resin to obtain a modified melamine formaldehyde solid resin with a solid content of more than 85%; adding a viscosity adjusting agent, dissolving the solid resin, respectively adding a curing agent, a foam stabilizer, an emulsifier and a foaming agent, and uniformly stirring; placing the resulting mixture in an oven or a microwave oven to carry out foaming to achieve a predetermined density; and placing the resulting material in the oven or the microwave oven to carry out aging to obtain the melamine formaldehyde foam with a closed-cell rate of more than 90%. The melamine formaldehyde resin closed-cell foam produced by the preparation method has excellent mechanical strength and flame retardant property, and can be applicable for building exterior wall thermal insulation.

Description

A kind of preparation method of terpolycyantoamino-formaldehyde resin closed-cell foam
Technical field
The present invention relates to a kind of preparation method who can be used for the terpolycyantoamino-formaldehyde resin closed-cell foam material of various building exterior wall heat preservings, belong to field of new.
Background technology
In various organic resin foam materialss, terpolycyantoamino-formaldehyde resin foam materials has good flame retardant properties, thermostability, low smokiness, high ageing-resistant performance.In recent years, the exploitation pay attention to day by day of domestic universities and colleges to terpolycyantoamino-formaldehyde resin foam.
From domestic external, producing at present terpolycyantoamino-formaldehyde resin foam materials enterprise has German BASF, and Japan is aboveground, largeization of Central Plains, Henan, Sichuan petrochemical industry, and the terpolycyantoamino-formaldehyde resin foam principal item of its production is terpolycyantoamino-formaldehyde resin open celled foam.This terpolycyantoamino-formaldehyde resin open celled foam has been successfully applied to automobile, rail vehicle, kino, public place and has used as sound-proof material.But use and have no report as architecture exterior wall insulating materials.Analyze the high opening rate that its major cause is terpolycyantoamino-formaldehyde resin foam, cause its effect of heat insulation not as materials such as polyurethane foam, polystyrene foam, phenolic resin foams, and terpolycyantoamino-formaldehyde resin foam also exists the shortcoming of easy efflorescence, the terpolycyantoamino-formaldehyde resin foamy body making can not meet the required basic demand of external-wall heat-insulation material.
Summary of the invention
The preparation method who the object of this invention is to provide a kind of terpolycyantoamino-formaldehyde resin closed-cell foam, the terpolycyantoamino-formaldehyde resin closed-cell foam material preparing has high mechanical property and flame retardant properties, can be for building exterior wall heat preserving.
To achieve these goals, the technical solution used in the present invention is: a kind of preparation method of terpolycyantoamino-formaldehyde resin closed-cell foam, is characterized in that comprising the steps:
1), in terpolycyantoamino-formaldehyde resin building-up process, introduce properties-correcting agent copolymerization, then through processed, obtain solids content higher than 85% modified melamine-formaldehyde solid resin;
2), by step 1) the modified melamine-formaldehyde solid resin that obtains adds adjusting adhesive, after dissolving, adds respectively solidifying agent, foam stabilizer, emulsifying agent, whipping agent, stir; Each material addition be take modified melamine-formaldehyde solid resin as reference, adds adjusting adhesive 10 ~ 200g, solidifying agent 5 ~ 200g, foam stabilizer 5 ~ 10g, emulsifying agent 5 ~ 10g, whipping agent 5 ~ 30g in every 200g modified melamine-formaldehyde solid resin;
3), by step 2) mixture put into microwave or baking oven foams, reach after predetermined density 36 ~ 100kg/cm3, again foam is transferred in baking oven, slaking 3-30 minute under 100-120 degree condition, obtain terpolycyantoamino-formaldehyde resin closed-cell foam, rate of closed hole is 94.9 ~ 98.3%, and oxygen index is 30.0 ~ 35.2, thermal conductivity is 0.022 ~ 0.031, compression performance 156.1 ~ 198.7kPa.
Step 1) detailed process is: formaldehyde is packed in reactor, with agitator, stir, add a small amount of caustic soda, adjust pH8.0 ~ 10.0, add buffer reagent trolamine, with temperature controller, be warmed up to 50 degree simultaneously, add trimeric cyanamide, then add properties-correcting agent copolyreaction after 60 minutes, vacuum hydro-extraction, maintains below dehydration temperaturre 100 degree, until solids content is higher than 85%, cooling, obtain modified melamine-formaldehyde solid resin.Properties-correcting agent add-on be trimeric cyanamide consumption 10~95% between (weight ratio).
Described properties-correcting agent is one or more in phenol, benzoguanamine, first substituted melamine, polyester, polyethers, Dyhard RU 100.
Described adjusting adhesive is one or more in ethylene glycol, glycol ether, diglycolamine, thanomin, butanolamine, diethanolamine, methyl alcohol, ethanol, butanols, triglycol, trolamine, low molecular weight polycaprolactone ether compound (molecular weight is less than 2000).
Described solidifying agent be in formic acid, acetic acid, sulfuric acid, phosphoric acid, tosic acid, hexanodioic acid, oxalic acid, hydrochloric acid, tolylene diisocyanate (TDI), diphenylmethanediisocyanate (MDI), polymethylene multi-phenenyl isocyanate (PAPI) one or more.
Described foam stabilizer be in organosilicon and poly organic silicon one or more.
Described emulsifying agent is one or more in sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, alkylphenol polyoxyethylene (OP-10).
Described whipping agent is one or more in butane, Skellysolve A, normal hexane, hexanaphthene, pentamethylene, sherwood oil, ethylene dichloride, dichlorotrifluoroethane (HCFC-123), dichloro one fluoroethane (HCFC-141b), chlorodifluoroethane.
Prepared foam has high rate of closed hole, is terpolycyantoamino-formaldehyde resin closed-cell foam.Can be for building exterior wall heat preserving.
The ultimate principle that the present invention prepares terpolycyantoamino-formaldehyde resin closed-cell foam is:
Adopt modified melamine-formaldehyde solid resin to foam, reduce the moisture content in terpolycyantoamino-formaldehyde resin, improve the rate of closed hole of terpolycyantoamino-formaldehyde resin foam, reduce the thermal conductivity of terpolycyantoamino-formaldehyde resin foam.
Adopt properties-correcting agent to improve water repelling property, dimensional stability and the flexility of foam, the fragility that solves terpolycyantoamino-formaldehyde resin foam is large, and ultimate compression strength is low, dry linting serious problems.
Adopt adjusting adhesive can allow melamino-formaldehyde solid resin fully dissolve, obtain the resin solution of appropriate viscosity.Prevent that viscosity is excessive, the foam density of generation is excessive, even cannot foam; Prevent that the too small whipping agent that causes of viscosity from escaping in heat-processed, even occur the foam bubble phenomenon of collapsing.The preferential solvent based compound of selecting to have with resin well blend ability.
Solidifying agent is the key factor of foam size stability, guarantee, under the precondition of resin solidification speed, should to reduce its usage quantity as far as possible, reduces the corrosive nature to base material.
Beneficial effect: the preparation method of terpolycyantoamino-formaldehyde resin closed-cell foam provided by the invention, simple to operate, by add different adjusting adhesives, solidifying agent, foam stabilizer, emulsifying agent, whipping agent on modified melamine-formaldehyde solid resin basis, the terpolycyantoamino-formaldehyde resin closed-cell foam foam, slaking production obtaining having high rate of closed hole, the fragility that can solve terpolycyantoamino-formaldehyde resin foam is large, ultimate compression strength is low, dry linting serious problems, gained foam can be for building exterior wall heat preserving.
Embodiment
The embodiment of the present invention given below, is just further described specifically the present invention.It is important to point out, embodiment, only for the present invention is further elaborated, can not be interpreted as limiting the scope of the invention.The present embodiment is done to appropriate improvement or change, still belong to protection scope of the present invention.
Embodiment mono-
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust pH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 100 grams of 200 grams of phenol, Dyhard RU 100 to be reacted to after 60 minutes, vacuum hydro-extraction, maintain below dehydration temperaturre 100 degree, until solids content reaches 89.2%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added to 10 grams of adjusting adhesive ethylene glycol, after dissolving, add again 10 grams of 20 grams of solidifying agent phosphoric acid, 5 grams of emulsifier sodium lauryl sulfates, foam stabilizer organosilicon AK8805 10 grams (Nanjing dolantin Shi Chuan company limited), whipping agent Skellysolve As, strong stirring hybrid resin 5 minutes.Put into microwave and foam, reach after predetermined density 36 ~ 100kg/cm3, then proceed to baking oven slaking 5 minutes under 120 degree conditions, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 45.1kg/cm3, rate of closed hole 95.3%, and oxygen index: 35.2, thermal conductivity is 0.031, compression performance 175kPa(deformation 10%).
Embodiment bis-
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, add 100 grams of Dyhard RU 100s, be reacted to after one hour, beginning is dewatered below 100 degree, until solids content reaches 87.7%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added to 10 grams of adjusting adhesive glycol ethers, 10 grams of ethylene glycol, after dissolving, add again 5 grams of 20 grams, solidifying agent formic acid, 5 grams of emulsifier sodium lauryl sulfates, foam stabilizer organosilicon 580# 5 grams (Jiangsu Yoke Technology Co., Ltd.), whipping agent ethylene dichloride, stir.Mixture is put into microwave and foam, reach after predetermined density, then proceed to baking oven slaking 15 minutes under 120 degree conditions, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 53.5kg/cm3, rate of closed hole, and 97.6%, oxygen index: 32.1, thermal conductivity is 0.025, compression performance 156.1kPa(deformation 10%).
Embodiment tri-
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 10 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of first substituted melamines, 100 grams of polyethers 204# [Nantong Lv Yuan novel material company limited], be reacted to after one hour, beginning is dewatered below 100 degree, resin solid content reaches 90.5%, cooling, obtains modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added to 10 grams, adjusting adhesive butanols, 10 grams of butanolamines, after dissolving, add again 5 grams of 5 grams of solidifying agent acetic acid, 10 grams of emulsifier sodium lauryl sulfates, foam stabilizer organosilicon 580# 10 grams (Jiangsu Yoke Technology Co., Ltd.), whipping agent hexanaphthenes, stir, put into baking oven and foam, reach after predetermined height, proceed to again baking oven slaking 10 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 65kg/cm3, rate of closed hole, and 94.9%, oxygen index: 33.5, thermal conductivity is 0.026, compression performance 198.7kPa(deformation 10%).
Embodiment tetra-
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, add 300 grams of Dyhard RU 100s, be reacted to after one hour, add 200 grams of Amino Terminated polyether(ATPE) 450# (Nantong Lv Yuan novel material company limited) to start to dewater below 100 degree, until solids content reaches 88.8%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added to 10 grams of adjusting adhesive diglycolamines, triglycol 10g, after dissolving, add again 10 grams of solidifying agent oxalic acid, 10 grams of tolylene diisocyanates (TDI), 5 grams of alkylphenol polyoxyethylene emulsifying agents (OP-10), foam stabilizer organosilicon AK8805 10 grams of (Nanjing Dymatic Shichuang Chemical Co., Ltd.), 5 grams of whipping agent dichloro one fluoroethanes (HCFC-141b), dichlorotrifluoroethane 5g, stir, after microwave foaming, proceed to again baking oven slaking 30 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 45.7kg/cm3, rate of closed hole, and 96.4%, oxygen index: 30.2, thermal conductivity is 0.022, compression performance 173.2kPa(deformation 10%).
Embodiment five
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, add 100 grams of Dyhard RU 100s, be reacted to after one hour, beginning is dewatered below 100 degree, until solids content reaches 89.2%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added after 20 grams of adjusting adhesive low molecular polyether compound L Y204# (Nantong Lv Yuan novel material company limited), dissolving, add again 20 grams of solidifying agent hexanodioic acids, 5 grams of emulsifying agent alkylphenol polyoxyethylene (OP-10), foam stabilizer organosilicon 3363#(Nanjing dolantin Shi Chuan company limited) 5 grams of 5 grams, whipping agent sherwood oil (boiling range 60-90 degree), stir.Put into microwave foaming after predetermined density, then proceed to baking oven slaking 30 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 52.9kg/cm3, rate of closed hole, and 97.1%, oxygen index: 34.7, thermal conductivity is 0.028, compression performance 183.6kPa(deformation 10%).
Embodiment six
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, be reacted to after one hour, beginning is dewatered below 100 degree, until solids content reaches 90.7%, cooling, obtain modified melamine-formaldehyde solid resin.
After 200 grams of above-mentioned solid resins are added to 20 grams of adjusting adhesive methyl alcohol, dissolve, then add 20 grams of solidifying agent tosic acid, 10 grams of emulsifying agent Sodium dodecylbenzene sulfonatees, 10 grams of foam stabilizer organosilicon 8805# (Nanjing dolantin Shi Chuan company limited), 15 grams of whipping agent chlorodifluoroethanes, stir.Put into baking oven and foam, then proceed to baking oven slaking 30 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 56.5kg/cm3, rate of closed hole, and 98.3%, oxygen index: 31.7, thermal conductivity is 0.025, compression performance 196.5kPa(deformation 10%).
Embodiment seven
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, 100 grams of (Nantong Lv Yuan novel material company limiteds) 100 grams of polyethers 310# were reacted to after one hour, beginning is dewatered below 100 degree, until solids content reaches 90.4%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added after 20 grams of adjusting adhesive ethanol, dissolving, add again 5 grams of emulsifying agent Sodium dodecylbenzene sulfonatees, 10 grams of alkylphenol polyoxyethylene (OP-10), whipping agent butane 5g, 10 grams of normal hexanes, 20 grams of solidifying agent acetic acid, diphenylmethanediisocyanate PM200 200 grams (Yantai Wan Hua company), stir.Foaming, then proceed to baking oven slaking 5 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 57.8kg/cm3, rate of closed hole, 95.6%, oxygen index: 30.0 thermal conductivitys are 0.022, compression performance 166.5kPa(deformation 10%).
Embodiment eight
2527 grams of 37% formalins are packed in reactor, with agitator, stir, add a small amount of caustic soda (40%) to adjust PH 10, add 5 grams of trolamines (analytical pure), with temperature controller, be warmed up to 50 degree simultaneously, add 1052 grams of 99% trimeric cyanamides (top grade product), add 200 grams of benzoguanamines, 200 grams of (Nantong Lv Yuan novel material company limited) reactions of polyethers 210# are after one hour, beginning is dewatered below 100 degree, until solids content reaches 90.4%, cooling, obtain modified melamine-formaldehyde solid resin.
200 grams of above-mentioned solid resins are added after 20 grams of adjusting adhesive thanomins, dissolving, add again 5 grams of emulsifying agent Sodium dodecylbenzene sulfonatees, foam stabilizer organosilicon FQ5003# 10 grams of (Nanjing dolantin Shi Chuan company limited), 15 grams of whipping agent methylene dichloride, 20 grams, solidifying agent sulfuric acid, 5005 # 20 grams of polymethylene multi-phenenyl isocyanate PAPI (German Hensel Man), stir.Foaming, then proceed to baking oven slaking 10 minutes under 120 degree regulate, obtain closed pore terpolycyantoamino-formaldehyde resin foam.
Foam density is 50.8kg/cm3, rate of closed hole, 90.6%, oxygen index: 28.0 thermal conductivitys are 0.035, compression performance 130.5kPa(deformation 10%).

Claims (6)

1. a preparation method for terpolycyantoamino-formaldehyde resin closed-cell foam, is characterized in that comprising the steps:
1), in terpolycyantoamino-formaldehyde resin building-up process, introduce properties-correcting agent copolymerization, then through processed, obtain solids content higher than 85% modified melamine-formaldehyde solid resin, properties-correcting agent add-on be trimeric cyanamide consumption 10~95% between (weight ratio); Described properties-correcting agent is one or more in phenol, benzoguanamine, first substituted melamine, Dyhard RU 100;
2), by step 1) the modified melamine-formaldehyde solid resin that obtains adds adjusting adhesive, after dissolving, adds respectively solidifying agent, foam stabilizer, emulsifying agent, whipping agent, stir; Each material addition be take modified melamine-formaldehyde solid resin as reference, adds adjusting adhesive 10 ~ 200g, solidifying agent 5 ~ 200g, foam stabilizer 5 ~ 10g, emulsifying agent 5 ~ 10g, whipping agent 5 ~ 30g in every 200g modified melamine-formaldehyde solid resin;
3), by step 2) mixture foam, reach predetermined density 36 ~ 100kg/cm 3after, slaking 3-30 minute under 100-120 degree condition, obtains terpolycyantoamino-formaldehyde resin closed-cell foam, rate of closed hole is 94.9 ~ 98.3%, oxygen index is 30.0 ~ 35.2, thermal conductivity is 0.022 ~ 0.031W/m.k, compressive strength 156.1 ~ 198.7kPa.
2. according to the preparation method of the terpolycyantoamino-formaldehyde resin closed-cell foam described in right 1, it is characterized in that: described adjusting adhesive is one or more in ethylene glycol, glycol ether, diglycolamine, thanomin, butanolamine, diethanolamine, methyl alcohol, ethanol, butanols, triglycol, trolamine, the molecular weight low molecular weight polycaprolactone ether compound that is 600 ~ 1600.
3. according to the preparation method of the terpolycyantoamino-formaldehyde resin closed-cell foam described in right 1, it is characterized in that: described solidifying agent be in formic acid, acetic acid, sulfuric acid, phosphoric acid, tosic acid, hexanodioic acid, oxalic acid, hydrochloric acid, tolylene diisocyanate (TDI), diphenylmethanediisocyanate (MDI), polymethylene multi-phenenyl isocyanate (PAPI) one or more.
4. according to the preparation method of the terpolycyantoamino-formaldehyde resin closed-cell foam described in right 1, it is characterized in that: described foam stabilizer is organosilicon.
5. according to the preparation method of the terpolycyantoamino-formaldehyde resin closed-cell foam described in right 1, it is characterized in that: described emulsifying agent is one or more in sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, alkylphenol polyoxyethylene (OP-10).
6. according to the preparation method of the terpolycyantoamino-formaldehyde resin closed-cell foam described in right 1, it is characterized in that: described whipping agent is one or more in butane, Skellysolve A, normal hexane, hexanaphthene, sherwood oil, ethylene dichloride, dichlorotrifluoroethane, dichloro one fluoroethane, chlorodifluoroethane.
CN201210328428.XA 2012-09-07 2012-09-07 Preparation method for melamine formaldehyde resin closed-cell foam Expired - Fee Related CN102898778B (en)

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