CN102516494A - Foaming composition for water tank of solar water heater - Google Patents
Foaming composition for water tank of solar water heater Download PDFInfo
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- CN102516494A CN102516494A CN2011104189199A CN201110418919A CN102516494A CN 102516494 A CN102516494 A CN 102516494A CN 2011104189199 A CN2011104189199 A CN 2011104189199A CN 201110418919 A CN201110418919 A CN 201110418919A CN 102516494 A CN102516494 A CN 102516494A
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Abstract
The invention discloses a foaming composition for a water tank of a solar water heater, which is characterized by comprising the following main raw materials: a polyether foaming agent, sodium bicarbonate, chitosan and hollow glass beads. The improved polyether rigid foam composition can be used for reducing the phenomena that after being sprayed from a glossy jar and formed, a polyurethane material has high contractibility, the heat preservation effect of the water tank of the solar water heater is influenced and the water tank is deformed, bulged and barred, or even cracked.
Description
Technical field
The present invention relates to a kind of solar water heater water tank lagging material, particularly polyethers whipping agent is the compsn of staple.
Background technology
Because environmental protection and energy saving are advocated in the whole world energetically, solar water heater has become domestic hot water's main source, and China's solar water heater has become first use state and the producing country of solar water heater in the world.As everyone knows; Concerning solar water heater, solar vacuum-tube water heater especially, the lagging material of water tank mainly adopts polyurethane hard foam at present; Because the polyurethane hard foam thermal conductivity is lower; Convenient formation (is accomplished moulding reaction back lather volume less than maximum volume in the moulding process) greatly, the existence of molding shrinkage property but one of major defect of polyurethane hard foam is a moulding post shrinkage property; Often make the foams final volume less than the cavity volume of being filled, foam and housing take place peel off phenomenon; And capillary reason when foaming owing to polyurethane hard foam; Connect bad between the hole wall of bubble; Make aperture and connectedness reduce; After the reaction moulding lather collapse with collapse, cause water tank distortion, rise and heave stupefied even cracking, that is to say phenomenons such as solar water heater manufacturer often said " decortication ", " shelling ", " extracting a backbone out ".Outward appearance, heat insulation effect even the work-ing life of goods have been had a strong impact on.Therefore, in most application scenarios, the employing thickening polyurethane hard foam layer that has; The employing that has improves filled and process density, take mode such as molded to solve, but thickening the polyurethane hard foam layer has increased the water tank outer volume, and cost improves; And take moldedly, also increased manufacture difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of compsn that is used to make the improved polyethers rigid foam of solar water heater water tank, can reduce the urethane material from the aerosol jar, spray moulding post shrinkage property big, influence the water-heater water tank heat insulation effect, avoid water tank to be out of shape and heaves stupefied even the rimose phenomenon.
The main raw material and the parts by weight of heat-preserving water tank for solar water heater polyethers foaming composition of the present invention are:
Polyethers whipping agent 70-90 part;
Sodium hydrogencarbonate 3-8 part;
Chitosan 3-6 part;
Hollow glass micropearl 5-8 part;
Above-described polyethers whipping agent full name single component polyether foam spackling is commonly called as whipping agent, foamed glue, spackling, is the product of aerosol technology and polyether foam technology cross coupled.It is a kind of components such as Ju ether Yu Ju Wu ﹑ Fa Pao Ji ﹑ catalyzer to be filled in the special polyether product in the withstand voltage aerosol jar.When material sprayed from the aerosol jar, the polyethers material of foam shape can expand rapidly and form foam with moisture generation curing reaction in air or the matrix that touches.Foam after the curing has multiple effects such as Tian Feng ﹑ Nian Jie ﹑ Mi Feng ﹑ is heat insulation; The present invention uses the polyethers whipping agent of present domestic production; Can arrive on the market and buy, also can directly order goods to producer, there are a lot of families in domestic manufacturer; For example: Shanghai Dongda Polyurethane Co., Ltd, Luoyang, Changzhou Wujin heat insulating material factory etc., can use so long as be used for the aerial fog type polyethers whipping agent of present solar water heater water tank.Open source literature also introduced Shanghai Dongda Polyurethane Co., Ltd the complete water type combined polyether (Chinese patent: CN l02079803 A), so the inventor adopts water miscible polyethers whipping agent.
Described water soluble polyether whipping agent can adopt the water soluble polyether whipping agent of buying on the market, perhaps adopts the raw material of following parts by weight:
5-7 parts of glycerin polyether resins, 3-5 parts of glycol ether resins, 0.2-0.3 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.1-0.3 part of N-dimethylcyclohexylamine; 0.1-0.3 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates, 3-5 parts in water.
Above-described sodium hydrogencarbonate is a kind of inorganic foaming agent, white powder, and proportion 2.16, decomposition temperature is about 100-140 ℃, and emits portion C O
2, lose whole CO during to 270 ℃
2, join in the whipping agent and can when the rapid expansion temperature of material improves, emit portion C O
2Foam increases the gap, strengthens heat insulation effect.
Above-described chitosan is the low-molecular-weight chitosan of molecular weight (polymerization degree) 10,000 to 30,000, with the acetate dissolving of 1-3%, adds low-molecular-weight chitosan before using; Can make the polyethers material after the foaming have the hole that is interconnected, also have aperture between big hole wall, chitosan is adsorbed on internal surface of hole; The abscess that produces is not easy to vanish; The aperture is increased, thereby the rate of expansion of polyethers material is improved, heat insulation effect obviously improves.
Above-described hollow glass micropearl can be used nanometer SiO
2Replacement, hollow glass micropearl and nanometer SiO
2Particle diameter between the 10-100 nanometer, add hollow glass micropearl and nanometer SiO
2, make the percentage of open area of composite foam material increase, density reduces, and explains that obtained foam is more satisfactory.This can give the credit to hollow glass micropearl and nanometer SiO
2, in the foam forming process, brought into play the effect of pore-creating agent, prevent that also foam from shrinking simultaneously.Equally, hollow glass micropearl and nanometer SiO
2, also have the perforate effect for amidogen ether class composite foam, but the shrinkability of rigid foam in foaming process wants littler to the degree of dependence of perforate effect.The present invention records in experiment, adds hollow glass micropearl and nanometer SiO
2Can obviously prolong the set time of flexibility foam and amidogen ether class rigid foam, the aperture is increased.
Mechanism and advantage that heat-preserving water tank for solar water heater polyethers foaming composition of the present invention can replace existing polyurathamc are:
The formation of polyether foam need be experienced foaming process and two stages of maturing process.From the mixing of materials to the lather volume, expanding stops, and this process can be described as foaming process.In the foaming process, system is emitted a large amount of reaction heat, and reaction heat makes the whipping agent vaporization get into each abscess of foams, orders about cell volume and constantly expands.At this moment each abscess all receives the effect of two power: the pressure that barometric point and whipping agent expand and produce.When interior pressure during greater than external pressure, the volume of foaming system just constantly expands; When the abscess external and internal pressure equates; Foams no longer expand, and after promptly reaching so-called " rise expand time " foam and stopping to expand, the inner chemical reaction of system finishes fully; But, reach final strength until foams carrying out slow interlinkage reaction.This process is called the maturing process of foams.Lather volume expands and stops to indicate the end of foaming process, the beginning of maturing process.In maturing process, foams are no longer emitted a large amount of reaction heat, and temperature slowly reduces (finally can reduce to envrionment temperature).At this moment the abscess internal pressure also reduces, and produces inside and outside differential pressure.Pressure reduction produces certain influence to the formation of foams: if the intensity of cell wall is enough to support pressure reduction, then tangible distortion can not take place in foams; If cell wall intensity a little less than, then foams shrink under differential pressure action.Usually be referred to as " molding shrinkage ",, can reach 5% when serious generally below 1%, in addition bigger.
Theoretically, letting foams growth stopping back foam structure reach stable immediately is the optimum method that solves foam contraction.And in fact, this is impossible realize for present urethane industry, i.e. moulding shrinking percentage can not be zero, then can molding shrinkage be controlled in 1% fully but the production formula through the adjustment foamed material is aided with the foam process of science again.
At present, there is the people in foamed material, to add pore-creating agent, forms the very poor open celled foam of heat insulation effect.Though this method has been eliminated the pressure reduction in the foam maturing process, thereby reduce foam-formed shrinking percentage, pore-creating agent is selected when bad, and the foamy heat-insulating property reduces greatly, has the freezing possibility of water tank winter.Bad foam is the one of the main reasons that causes foam contraction, and its dimensional contraction rate is 2%～10%.
So the present invention adopts the polyethers whipping agent, and in material, add the inorganic foaming agent sodium hydrogencarbonate again, low-molecular-weight chitosan, hollow glass micropearl or nanometer SiO
2, can increase foam and foam aperture is increased, foam is difficult for atrophy before curing, also is not easy to make thermal insulation layer to separate with water tank, more can not cause phenomenons such as " decortication ", " shelling ", " extracting a backbone out ".
At present, the solar water heater is that one or many cast free foaming forms with polyurethane foam, repeatedly to be cast for the master, in the foaming process, except that receiving the normal atmosphere effect, does not receive the effect of other any ambient pressures.The polyurethane foam packing space must fill up before gelation process arrives fully, after the gel, if lather volume is still continuing expansion; Formed foam, abscess will obviously elongate, and it is fibrous that severe patient can be; Its physical and mechanical properties is very poor, and this area is referred to as " bad foam ".After its cooling, shrinking because of condensation of gas in the abscess is serious, expands with gas expansion in the abscess in the back that is heated.Repeatedly the foaming mode of cast makes this " bad foam " proportion increase.Moreover the intersection foam of adjacent twice cast formation, because of the difference of shrinking percentage, when catching a cold, be prone to cause the foam cracking.The present invention adds sodium hydrogencarbonate, low-molecular-weight chitosan, hollow glass micropearl or nanometer SiO
2Can make foam before gel, fill up segment space, because of limited space, lather volume can't continue to expand after the gel; And the blow(ing)pressure that produces voluntarily helps forming the abscess of ball-shaped structure, and the foam bubble hole intensity of this form is high; Good stability, not yielding.
And because the solvent great majority of polyurethane foam also use freonll-11; The havoc that earth atmosphere is caused; At present domestic polyurethane foams replaces freonll-11 class whipping agent with other organic solvents; The present invention does not re-use freonll-11 owing to adopt water miscible polyethers, has protected the ecotope of the earth.
Embodiment
Embodiment 1
Earlier with 5 parts of glycerin polyether resins, 3 parts of glycol ether resins, 0.2 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.1 part of N-dimethylcyclohexylamine, 0.1 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates; 3 parts in water obtains polyurethane foams after the reaction, add 5 kilograms of sodium hydrogencarbonates according to 80 kilograms of polyurethane foams then; 5.5 kilograms of chitosans, 8 kilograms of hollow glass micropearls are poured in the solar water heater water tank then; Solidified 5-10 hour, and can obtain the good solar water heater water tank of heat insulation effect, valve tube is installed just can be used.
Embodiment 2
Earlier with 6 parts of glycerin polyether resins, 4 parts of glycol ether resins, 0.25 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.2 part of N-dimethylcyclohexylamine, 0.25 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates; 4 parts in water obtains polyurethane foams after the reaction, add 6 kilograms of sodium hydrogencarbonates according to 70 kilograms of polyurethane foams then; 6 kilograms of chitosans, 6 kilograms of hollow glass micropearls are poured in the solar water heater water tank then; Solidified 5-10 hour, and can obtain the good solar water heater water tank of heat insulation effect, valve tube is installed just can be used.
Embodiment 3
Earlier with 7 parts of glycerin polyether resins, 5 parts of glycol ether resins, 0.3 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.3 part of N-dimethylcyclohexylamine, 0.3 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates; 5 parts in water obtains polyurethane foams after the reaction, add 7 kilograms of sodium hydrogencarbonates according to 85 kilograms of polyurethane foams then; 5 kilograms of chitosans, nanometer SiO
210 kilograms, be poured into then in the solar water heater water tank, solidified 5-10 hour, can obtain the good solar water heater water tank of heat insulation effect, valve tube is installed just can be used.
Embodiment 4
Earlier with 7 parts of glycerin polyether resins, 5.5 parts of glycol ether resins, 0.28 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.15 part of N-dimethylcyclohexylamine, 0.26 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates; 4.5 parts in water obtains polyurethane foams after the reaction, add 4 kilograms of sodium hydrogencarbonates according to 75 kilograms of polyurethane foams then; 4 kilograms of chitosans, nanometer SiO
25 kilograms, be poured into then in the solar water heater water tank, solidified 5-10 hour, can obtain the good solar water heater water tank of heat insulation effect, valve tube is installed just can be used.
Application implementation example 1
In October, 2011; The applicant has made 2 solar water heaters; Hot well tank adopts the polyurethane foams of the Zhejiang Province company production of buying on the market as lagging material, because the whipping agent filling is bad, casing and foaming thermal-insulating have separation phenomenon; Cloudy weather (temperature 18-25 ℃), 70 ℃ of the highest water temperatures; In November, 2011; Adopt solar water heater water tank foaming composition of the present invention to fill cloudy weather (temperature 15-24 ℃), 80 ℃ of the highest water temperatures; The foaming composition raw materials cost is basic identical, explains that solar water heater water tank foaming composition heat insulation effect of the present invention is significantly improved.
Below be the performance of 500mm solar water heater hot water storage tank of the present invention:
500mm external diameter hot water storage tank performance subordinate list
| Product type | φ58/2100 |
| Sheating material | δ=0.4 import aluminium plating zinc plate |
| Liner material | δ=0.41SUS304-2B food grade stainless steel plate |
| Lagging material | The modified polyether foam material |
| Insulation layer thickness | 70mm |
| The valve tube hole count | 20/24/30/36 |
| Sealing material | High quality silicon rubber volume |
| TP | 1.2MPa |
| Average heat loss factor (W/ ㎡ ℃) | 0.77 |
| Water examination | The surface of each parts contact with water of water-heater does not have burn into and gets rusty, and the water quality free from extraneous odour does not have other insalubrious materials |
| Water-in | φ 20mm SUS304-2B food grade stainless steel plate |
| Water outlet | φ 20mm SUS304-2B food grade stainless steel plate |
| Venting port | φ 20mm SUS304-2B food grade stainless steel plate |
| Appearance requirement | Case surface is smooth, and coating is evenly level and smooth, does not have obvious wrinkle, cut, dirt and other defect |
| Empty solarization requirement | Too under 17000KJ/ ㎡ condition, the water-heater of water filling shines through continuing two skies in whole day solar irradiation amount, and each parts does not have breakage, does not have distortion and other influences the generation of water-heater changes of properties |
From last table explanation, polyethers foaming composition of the present invention has advantages such as heat insulation effect improves, average heat waste is less, and water tank is indeformable.
Claims (4)
1. solar water heater water tank foaming composition, it is characterized in that: its main raw material and parts by weight are:
Polyethers whipping agent 70-90 part;
Sodium hydrogencarbonate 3-8 part;
Chitosan 3-6 part;
Hollow glass micropearl 5-8 part.
2. solar water heater water tank foaming composition according to claim 1 is characterized in that: described water soluble polyether whipping agent can adopt the water soluble polyether whipping agent of buying on the market, perhaps adopts the raw material of following parts by weight:
5-7 parts of glycerin polyether resins, 3-5 parts of glycol ether resins, 0.2-0.3 part of suds-stabilizing agent water-soluble silicon oil, catalyst n; 0.1-0.3 part of N-dimethylcyclohexylamine; 0.1-0.3 part of solidifying agent dibutyl tin laurate, 10 parts of polyphenyl polyisocyanates, 3-5 parts in water.
3. solar water heater water tank foaming composition according to claim 1 is characterized in that: described chitosan is a molecular weight 10,000 to 30,000, and the acetate with 1-3% before using dissolves.
4. solar water heater water tank foaming composition according to claim 1 is characterized in that: described hollow glass micropearl can be used nanometer SiO
2Replacement, hollow glass micropearl and nanometer SiO
2Particle diameter between the 10-100 nanometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110418919 CN102516494B (en) | 2011-12-15 | 2011-12-15 | Foaming composition for water tank of solar water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110418919 CN102516494B (en) | 2011-12-15 | 2011-12-15 | Foaming composition for water tank of solar water heater |
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| Publication Number | Publication Date |
|---|---|
| CN102516494A true CN102516494A (en) | 2012-06-27 |
| CN102516494B CN102516494B (en) | 2013-09-11 |
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|---|---|---|---|
| CN 201110418919 Expired - Fee Related CN102516494B (en) | 2011-12-15 | 2011-12-15 | Foaming composition for water tank of solar water heater |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103319679A (en) * | 2013-07-15 | 2013-09-25 | 广西吉宽太阳能设备有限公司 | Polyurethane rigid foam inorganic fireproof thermal-insulation material for solar water tank |
| CN103319677A (en) * | 2013-07-15 | 2013-09-25 | 广西吉顺能源科技有公司 | Polyether polyol foam thermal-insulation material for water tank of solar water heater |
| CN103319678A (en) * | 2013-07-15 | 2013-09-25 | 广西吉宽太阳能设备有限公司 | Polyurethane rigid foam thermal-insulation material for water tank of solar water heater |
| CN103333310A (en) * | 2013-07-15 | 2013-10-02 | 广西超星太阳能科技有限公司 | Organic fireproof foaming composite of water tank of solar water heater |
| CN103333308A (en) * | 2013-07-15 | 2013-10-02 | 广西超星太阳能科技有限公司 | Perlite foaming thermal insulation material of water tank of solar water heater |
| CN103333309A (en) * | 2013-07-15 | 2013-10-02 | 广西吉顺能源科技有限公司 | Polyether polyol foaming inorganic fireproof thermal insulation material of water tank of solar water heater |
| CN103342792A (en) * | 2013-07-15 | 2013-10-09 | 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 |
| CN103396523A (en) * | 2013-07-15 | 2013-11-20 | 广西吉顺能源科技有限公司 | Polyether glycol foam organic fireproof thermal-insulation material of solar water heater water tank |
| CN103435769A (en) * | 2013-07-15 | 2013-12-11 | 广西超星太阳能科技有限公司 | Inorganic fireproof foamed thermal-insulation material for water tank of solar water heater |
| CN103791653A (en) * | 2014-01-23 | 2014-05-14 | 天津市助友传感仪器技术有限公司 | Building ecological and energy-saving system |
| CN103899884A (en) * | 2014-03-12 | 2014-07-02 | 广西吉宽太阳能设备有限公司 | Anti-slip positioning ring for heat preservation pipe and heat preservation pipe |
| CN104744658A (en) * | 2013-12-31 | 2015-07-01 | 深圳市富安娜家居用品股份有限公司 | Gel polyurethane sponge and preparation method thereof |
| CN105778036A (en) * | 2016-05-18 | 2016-07-20 | 毛文辉 | Environment-friendly type solar thermal-insulation building material |
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| 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 |
| CN103319678A (en) * | 2013-07-15 | 2013-09-25 | 广西吉宽太阳能设备有限公司 | Polyurethane rigid foam thermal-insulation material for water tank of solar water heater |
| CN103333309B (en) * | 2013-07-15 | 2015-04-15 | 广西吉顺能源科技有限公司 | Polyether polyol foaming inorganic fireproof thermal insulation material of water tank of solar water heater |
| CN103333310A (en) * | 2013-07-15 | 2013-10-02 | 广西超星太阳能科技有限公司 | Organic fireproof foaming composite of water tank of solar water heater |
| CN103333308A (en) * | 2013-07-15 | 2013-10-02 | 广西超星太阳能科技有限公司 | Perlite foaming thermal insulation material of water tank of solar water heater |
| CN103333309A (en) * | 2013-07-15 | 2013-10-02 | 广西吉顺能源科技有限公司 | Polyether polyol foaming inorganic fireproof thermal insulation material of water tank of solar water heater |
| CN103342792A (en) * | 2013-07-15 | 2013-10-09 | 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 |
| CN103396523A (en) * | 2013-07-15 | 2013-11-20 | 广西吉顺能源科技有限公司 | Polyether glycol foam organic fireproof thermal-insulation material of solar water heater water tank |
| 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 |
| CN103396523B (en) * | 2013-07-15 | 2016-02-24 | 山东晨光节能产品研发有限公司 | Solar water heater water tank polyether glycol glycol foam organic fireproof thermal-insulation material |
| CN103319677B (en) * | 2013-07-15 | 2016-02-03 | 广西吉顺能源科技有限公司 | Solar water heater water tank polyether glycol cellular insulant |
| CN103319677A (en) * | 2013-07-15 | 2013-09-25 | 广西吉顺能源科技有公司 | Polyether polyol foam thermal-insulation material for water tank of solar water heater |
| CN103435769A (en) * | 2013-07-15 | 2013-12-11 | 广西超星太阳能科技有限公司 | Inorganic fireproof foamed thermal-insulation material for water tank of solar water heater |
| 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 |
| CN103319678B (en) * | 2013-07-15 | 2015-09-09 | 广西吉宽太阳能设备有限公司 | Solar water heater water tank polyurethane hard foam lagging material |
| CN103319679A (en) * | 2013-07-15 | 2013-09-25 | 广西吉宽太阳能设备有限公司 | Polyurethane rigid foam inorganic fireproof thermal-insulation material for solar water tank |
| 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 |
| CN104744658A (en) * | 2013-12-31 | 2015-07-01 | 深圳市富安娜家居用品股份有限公司 | Gel polyurethane sponge and preparation method thereof |
| CN103791653B (en) * | 2014-01-23 | 2016-02-24 | 天津市助友传感仪器技术有限公司 | A kind of building ecological energy conserving system |
| CN103791653A (en) * | 2014-01-23 | 2014-05-14 | 天津市助友传感仪器技术有限公司 | Building ecological and energy-saving system |
| CN103899884A (en) * | 2014-03-12 | 2014-07-02 | 广西吉宽太阳能设备有限公司 | Anti-slip positioning ring for heat preservation pipe and heat preservation pipe |
| CN105778036A (en) * | 2016-05-18 | 2016-07-20 | 毛文辉 | Environment-friendly type solar thermal-insulation building material |
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