CN101696280B - Process for foam moulding of fluorine-free polyurethane - Google Patents
Process for foam moulding of fluorine-free polyurethane Download PDFInfo
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- CN101696280B CN101696280B CN2009100662472A CN200910066247A CN101696280B CN 101696280 B CN101696280 B CN 101696280B CN 2009100662472 A CN2009100662472 A CN 2009100662472A CN 200910066247 A CN200910066247 A CN 200910066247A CN 101696280 B CN101696280 B CN 101696280B
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Abstract
The invention particularly relates to a process for foam moulding of fluorine-free polyurethane. The process comprises the following steps of: using polyether polyol and isocyanate as raw materials; adding a foaming agent and a foam stabilizer into the raw materials, and then sufficiently stirring and mixing the materials for the first time under an inert atmosphere to obtain a foam-like composition dispersed with an inert gas; then stirring the materials for the second time to obtain a polyurethane foam, wherein the rotating speed ratio of the first time stirring to the second time stirring is 1.5-4.5:1; and spraying and coating the polyurethane foam for molding. The process uses the fluorine-free polyurethane material to perform on-site foaming in the process of building construction, improves the leakproofness and the tightness of the fluorine-free polyurethane, and well improves the heat preservation effect; besides, the fluorine-free polyurethane has a low manufacturing cost and can be better popularized.
Description
(1) technical field
The present invention be more particularly directed to a kind of process for foam moulding of fluorine-free polyurethane.
(2) background technology
The quality of room body heat insulation effect is to build the key that whether can reach energy conservation standard.The traditional architecture roof insulation is to adopt insulating brick, and not only difficulty of construction is big for it, the waste resource, and effect of heat insulation is poor, and present external-wall heat-insulation material mainly contains expansion polyphenyl plate, glue powder polyphenyl particle, inorganic heat insulation mortar etc.The expansion polyphenyl plate heat preserving energy-saving efficiency is good, and standard is also compared in construction; But the expansion polyphenyl plate thinly plastered external insulation system of outer wall is relatively poor aspect Wind-Pressure Resistance, impact resistance, and problem that bonding is not really up to the mark with the plastering mortar quality, expansion polyphenyl plate is slowly degraded etc. causes the firmness of its thermal insulation layer and anti-permanence poor.Glue powder polyphenyl granule exterior wall outer heat preservation system heat preservation and energy conservation effects is good, thermal insulation layer and body of wall easily bonding and less demanding to the planeness of basic unit's body of wall, construction technology simple, construction costs is lower, but its fire resistance is relatively poor, and there is contradiction in the intensity technology of the heat insulation effect of heat-insulation system and thermal insulation layer, the difficult assurance of granular polystyrene content in the heat preservation slurry.Inorganic heat insulation mortar system lagging material selects for use the inorganic hollow glass bead to be equipped with the polymer latex slurry, and this superintegrated miniature hollow thermal insulation system fire resistance is good, and ultimate compression strength and pressure are cut cohesive strength height, good weatherability, and drying shrinkage is little; But owing to inorganic glass bead density is bigger, so its thermal conductivity is also bigger, heat preservation and energy conservation effects is also just relatively poor, if its insulation thickness of thickening has just simultaneously also strengthened it from gravity, will influence the stability of the long-term safety use of heat-insulation system.
Building energy conservation is an urgent demand of Sustainable development, the quality of room body heat insulation effect, be to build the key that whether can reach energy conservation standard, the appearing as of polyurethane material found a kind ofly to be possessed the floride-free architecture exterior wall insulating materials of all multi-functional environmental protections such as insulation, waterproof, sound insulation, absorbing simultaneously the solution thinking is provided, but because the restriction of foaming forming technique at present, it is realizing being still waiting improvement on the performances such as better insulation, resistance to compression, environmental protection.
(3) summary of the invention
The object of the present invention is to provide a kind of process for foam moulding of fluorine-free polyurethane, can't better realize the present situation of performances such as the insulation of floride-free architecture exterior wall insulating materials, resistance to compression, environmental protection to improve existing foaming forming technique.
The technical solution used in the present invention is as follows:
A kind of process for foam moulding of fluorine-free polyurethane is a raw material with polyether glycol and isocyanic ester, carries out fully mixing the first time under inert atmosphere earlier behind adding whipping agent and the suds-stabilizing agent, obtains being dispersed with the spumescence composition of rare gas element; Carry out secondary stirring afterwards and obtain polyurethane foaming body; Described secondary is 1.5～4.5: 1 with the rotating ratio that stirs for the first time; The moulding of spraying polyurethane foam.
Described whipping agent is that the part by weight of water and dme is 8-10: 1 mixture, the amount of adding are the 4.5-5.5% of polyether glycol and isocyanic ester gross weight.
Described suds-stabilizing agent is a polyether modified silicon oil, and addition is the 0.5-2% of polyether glycol weight.
The part by weight of polyether glycol and isocyanic ester is 1: 1.1-1.6.
Further, the rotating speed that stirs for the first time is 250-1400rpm; Churning time is 15-20min.
The rotating speed of secondary stirring is 375-2800rpm; Churning time is 10-15min.
The quality of room body heat insulation effect is closely-related with the quality of thermal insulation layer, and the quality of thermal insulation layer and foaming technique, the material that is adopted and insulation layer thickness tight association.
Carried out twice stirring among the present invention, be stirred in first stirring mixer He under the atmosphere of inert gases for the first time and carry out; Be stirred in second stirring mixer for the second time and carry out; The uniform mixing of raw material can be made very effectively and has fine and polyurethane foaming body uniform foam structure, and this heat-insulating property influence to follow-up polyurethane material is bigger.Polyurethane foaming body enters and mixes ejection in the spray coating mechanical, is vaporific one minute foamed set and is shaped to the hard foam with waterproof and adiabatic function.
Generally use water as the difficult problem that whipping agent can solve objectionable impuritiess such as fluorine-containing in the agent of coventional type urethane foam plastic foaming, chlorine, but polyurethane foam intensity is low, poor stability, heat insulating ability are poor, the characteristic that the present invention utilizes dme to dissolve each other with water, it is applied to full water foamed route, help to improve the defective on the complete water base foam performance, and can reduce the consumption of isocyanic ester.In addition, used for dimethyl ether also can significantly reduce the system viscosity in full water foamed system, the mixing of each component in the raising system.After dme and water dissolve each other, overcome the lower characteristics of its boiling point, significantly improved the azeotropic point of dme/water, made it still can use current device when in existing various foam process, using.Secondly the toxicity of dme is extremely low, and about about 10 days is carbonic acid gas and water with regard to degradable in atmospheric layer, and ODP (ozone-depleting dive value) is zero, thereby can not cause environmental pollution and influence ozonosphere.Simultaneously, dme all has high resolution to polarity and nonpolar organic matter matter, and is soluble in water, with most of solvents can both mixing; Security is higher relatively.Further, the mutual solubility of dme and polyvalent alcohol helps improving the foaming efficient and the dimensional stability of polyurethane foam.These characteristics of dme both can guarantee the production safety of polyurethane foam, again existing polyurethane foam production equipment were had extensive adaptability, and in addition, dme is lower than fluorine-containing whipping agent as the polyurethane foams cost.
The thickness of thermal insulation layer is adjusted according to actual needs, generally at 50～60 ± 0.5mm.
This technology can adopt at present, and the general quantitative integral foam equipment of High Temperature High Pressure carries out.
Use fluorinefree polyurethane moulding foam process of the present invention can carry out whole foam-in-place under construction, broken airtight poor, fastening poor, the shortcoming that the cost height is difficult for utilization and extention of traditional construction material, the one step foaming moulding, with body of wall caking ability height, with basic unit's body of wall mortise, need not any tackiness agent and anchoring piece, just can form an organic whole with basic unit's body of wall, form the successive thermal insulation layer, guarantee lagging material and integrality of wall and effectively block heat bridge; Combine with air collector and blast ventilation system, capable of reducing energy consumption, effectively reduce the use of fossil energy, reduce and pollute, reduce emission of carbon-dioxide.Because polyurethane material has the ideal watertightness, therefore can form the seamless roof system and the whole exterior-wall heat insulation housing of waterproof impervious characteristic excellence simultaneously.Directly spraying has realized no seam, no cavity, can reach good wind resistance and take off and the wind suction prevention performance, and the Wind-Pressure Resistance ability is strong, reduces the destruction of blast to the external wall of high-rise building outer heat preservation system.Foam process itself has also improved the thermal insulation layer rate of closed hole, improves its heat-proof quality energy.Chemical property is stable, long service life, and water and dme are made whipping agent, and fluorin environment protection does not constitute pollution to surrounding environment.Polyurathamc is a kind of material of difficult combustion self-extinguishing, and the fire safety performance is good.This technology also helps mechanized, and speed of application is fast, efficient is high, thereby shortens construction period.
The present invention has following advantage with respect to prior art:
The present invention utilizes the fluorinefree polyurethane material, in building construction process, carry out foam-in-place, improved stopping property, tightness, well improved insulation, Wind-Pressure Resistance and environmental-protecting performance, and cheap, be convenient to mechanized construction, help higher generalization and popularize.
(4) embodiment:
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
Process for foam moulding of fluorine-free polyurethane, with the part by weight of Xylitol and quadrol is that 10: 1 mixture and isocyanic ester is raw material, earlier under inert atmosphere, carry out fully mixing the first time after adding whipping agent and suds-stabilizing agent, obtain being dispersed with the spumescence composition of rare gas element; Carry out secondary stirring afterwards and obtain polyurethane foaming body; The rotating speed that stirs is 250rpm for the first time, stirs 20min; The rotating speed that stirs is 375rpm for the second time, stirs 15min; The moulding of spraying polyurethane foam.Described whipping agent is that the part by weight of water and dme is 8: 1 a mixture, and add-on is 5% of Xylitol and quadrol and an isocyanic ester gross weight.Described suds-stabilizing agent is a polyether modified silicon oil, and addition is 0.5% of a polyvalent alcohol.The part by weight of polyether glycol and isocyanic ester is 1: 1.1.
The performance perameter of the urethane that foaming obtains is as follows:
| Project | Index |
| Density Kg/m 3 | 35~60 |
| Water-absorbent (%) | ≤2.5 |
| Winter hardiness ℃ | -180 |
| Thermotolerance ℃ | 130 |
| Compression performance (distortion 10%) (Kpa) | ≥150 |
| Rate of closed hole (%) | ≥95 |
| Thermal conductivity [W/ (m.k)] | 0.018~0.023 |
| Watertightness (no skinning) 0.2Mpa30min | Waterproof |
| Oxygen index | 26 |
| Flame retardant rating | B1 level, B2 level |
Embodiment 2
Process for foam moulding of fluorine-free polyurethane, with quadrol and tetramethylolmethane weight ratio is that 1: 1 mixture and isocyanic ester is raw material, earlier under inert atmosphere, carry out fully mixing the first time after adding whipping agent and suds-stabilizing agent, obtain being dispersed with the spumescence composition of rare gas element; Carry out secondary stirring afterwards and obtain polyurethane foaming body; The rotating speed that stirs is 1400rpm for the first time, and churning time is 15min; The rotating speed that stirs is 2800rpm for the second time, and churning time is 10min; The moulding of spraying polyurethane foam.Described whipping agent is that the part by weight of water and dme is 9: 1 a mixture, and add-on is 5.5% of tetramethylolmethane and quadrol and an isocyanic ester gross weight.Described suds-stabilizing agent is a polyether modified silicon oil, and addition is 1.0% of a polyvalent alcohol.The part by weight of combined polyether and isocyanic ester is 1: 1.3.
Polyester
Embodiment 3
Process for foam moulding of fluorine-free polyurethane, with quadrol and N.F,USP MANNITOL part by weight is that 1: 10 mixture and isocyanic ester is raw material, earlier under inert atmosphere, carry out fully mixing the first time after adding whipping agent and suds-stabilizing agent, obtain being dispersed with the spumescence composition of rare gas element; Carry out secondary stirring afterwards and obtain polyurethane foaming body; The rotating speed that stirs is 500rpm for the first time, and churning time is 17min; The rotating speed that stirs is 2250rpm for the second time, and churning time is 13min; The moulding of spraying polyurethane foam.Described whipping agent is that the part by weight of water and dme is 10: 1 a mixture, and add-on is 4.5% of N.F,USP MANNITOL and quadrol and an isocyanic ester gross weight.Described suds-stabilizing agent is a polyether modified silicon oil, and addition is 2.0% of a polyvalent alcohol.The part by weight of polyester and isocyanic ester is 1: 1.6.
Claims (7)
1. process for foam moulding of fluorine-free polyurethane, it is characterized in that, with polyether glycol and isocyanic ester is raw material, carries out fully mixing the first time under inert atmosphere earlier behind adding whipping agent and the suds-stabilizing agent, obtains being dispersed with the spumescence composition of rare gas element; Carry out secondary stirring afterwards and obtain polyurethane foaming body; Described secondary is 1.5～4.5: 1 with the rotating ratio that stirs for the first time; The moulding of spraying polyurethane foam; Described whipping agent is that the part by weight of water and dme is 8-10: 1 mixture, the amount of adding are the 4.5-5.5% of polyether glycol and isocyanic ester gross weight.
2. process for foam moulding of fluorine-free polyurethane as claimed in claim 1 is characterized in that, described suds-stabilizing agent is a polyether modified silicon oil, and addition is the 0.5-2% of polyether glycol weight.
3. process for foam moulding of fluorine-free polyurethane as claimed in claim 1 or 2 is characterized in that, the part by weight of polyether glycol and isocyanic ester is 1: 1.1-1.6.
4. process for foam moulding of fluorine-free polyurethane as claimed in claim 1 is characterized in that, the rotating speed that stirs is 250-1400rpm for the first time.
5. process for foam moulding of fluorine-free polyurethane as claimed in claim 4 is characterized in that, primary churning time is 15-20min.
6. process for foam moulding of fluorine-free polyurethane as claimed in claim 4 is characterized in that, the rotating speed of secondary stirring is 375-2800rpm.
7. process for foam moulding of fluorine-free polyurethane as claimed in claim 6 is characterized in that, secondary churning time is 10-15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100662472A CN101696280B (en) | 2009-10-23 | 2009-10-23 | Process for foam moulding of fluorine-free polyurethane |
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| CN2009100662472A CN101696280B (en) | 2009-10-23 | 2009-10-23 | Process for foam moulding of fluorine-free polyurethane |
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| CN101696280A CN101696280A (en) | 2010-04-21 |
| CN101696280B true CN101696280B (en) | 2011-07-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586155A (en) * | 2012-08-13 | 2014-02-19 | 江苏凯伦建材股份有限公司 | Foaming polyurethane spraying device and application method thereof |
| CN103265680A (en) * | 2013-06-04 | 2013-08-28 | 卡姆丹克太阳能（江苏）有限公司 | Fluoride-free polyurethane and foaming technology thereof |
| CN103435769B (en) * | 2013-07-15 | 2015-11-18 | 广西超星太阳能科技有限公司 | Solar water heater water tank inorganic fire foaming thermal-insulating |
| CN103333308B (en) * | 2013-07-15 | 2015-11-18 | 广西超星太阳能科技有限公司 | Solar water heater water tank perlite foaming thermal-insulating |
| CN103333310B (en) * | 2013-07-15 | 2015-11-18 | 广西超星太阳能科技有限公司 | Solar water heater water tank organic fire prevention foaming composition |
| CN103342792B (en) * | 2013-07-15 | 2015-05-13 | 广西吉宽太阳能设备有限公司 | Polyurethane rigid foam organic fireproof heat preservation material for solar water tank |
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| JP2006117750A (en) * | 2004-10-20 | 2006-05-11 | Nippon Polyurethane Ind Co Ltd | Method for producing polyurethane foam |
| CN1898286A (en) * | 2003-12-24 | 2007-01-17 | 日本聚氨酯工业株式会社 | Process for producing soft polyurethane foam, process for producing conductive soft polyurethane foam, conductive roll and process for producing the same |
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- 2009-10-23 CN CN2009100662472A patent/CN101696280B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| CN1662587A (en) * | 2002-04-26 | 2005-08-31 | 通用电气公司 | Fire retardant silicone surfactants for use in inert gas blown polyurethane foams |
| CN1898286A (en) * | 2003-12-24 | 2007-01-17 | 日本聚氨酯工业株式会社 | Process for producing soft polyurethane foam, process for producing conductive soft polyurethane foam, conductive roll and process for producing the same |
| CN1696166A (en) * | 2004-05-12 | 2005-11-16 | 日本聚氨酯工业株式会社 | Fabricating of railway baseplate |
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Granted publication date: 20110720 Termination date: 20191023 |