CN102604031B - Preparation method and application of polyester polyurethane elastomer - Google Patents
Preparation method and application of polyester polyurethane elastomer Download PDFInfo
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- CN102604031B CN102604031B CN 201210064334 CN201210064334A CN102604031B CN 102604031 B CN102604031 B CN 102604031B CN 201210064334 CN201210064334 CN 201210064334 CN 201210064334 A CN201210064334 A CN 201210064334A CN 102604031 B CN102604031 B CN 102604031B
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- 229920000728 polyester Polymers 0.000 title claims abstract description 37
- 229920003225 polyurethane elastomer Polymers 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000004970 Chain extender Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 39
- 238000000465 moulding Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 229910052710 silicon Inorganic materials 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 230000018044 dehydration Effects 0.000 claims description 15
- 238000006297 dehydration reaction Methods 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 11
- 229920002635 polyurethane Polymers 0.000 claims description 11
- 239000004814 polyurethane Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000005987 sulfurization reaction Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229920005906 polyester polyol Polymers 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical group CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 6
- 150000001298 alcohols Chemical class 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 claims description 3
- XRYSCSFJNUNNAU-UHFFFAOYSA-N n-chloro-n-phenylaniline Chemical group C=1C=CC=CC=1N(Cl)C1=CC=CC=C1 XRYSCSFJNUNNAU-UHFFFAOYSA-N 0.000 claims description 3
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 235000010290 biphenyl Nutrition 0.000 claims description 2
- 239000004305 biphenyl Substances 0.000 claims description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 claims description 2
- 238000005238 degreasing Methods 0.000 claims description 2
- 150000004985 diamines Chemical class 0.000 claims description 2
- ILHIHKRJJMKBEE-UHFFFAOYSA-N hydroperoxyethane Chemical compound CCOO ILHIHKRJJMKBEE-UHFFFAOYSA-N 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000003245 working effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 description 3
- 241001112258 Moca Species 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- ICLCCFKUSALICQ-UHFFFAOYSA-N 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene Chemical compound C1=C(N=C=O)C(C)=CC(C=2C=C(C)C(N=C=O)=CC=2)=C1 ICLCCFKUSALICQ-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- -1 hard mass Inorganic materials 0.000 description 1
- PSVBHJWAIYBPRO-UHFFFAOYSA-N lithium;niobium(5+);oxygen(2-) Chemical compound [Li+].[O-2].[O-2].[O-2].[Nb+5] PSVBHJWAIYBPRO-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a preparation method and the application of polyester polyurethane elastomer. The total mass of chain extender in the polyester polyurethane elastomer accounts from 18-20% of the total mass of prepolymer and the chain extender, and the shore hardness is 98-100HA. The preparation method of the polyester polyurethane elastomer includes the steps: (1) prepolymer preparation; (2) pouring with a pouring machine; (3) curing and post-treatment; and (4) treatment at low temperature. Compared with normal polyurethane elastomer, the polyester polyurethane elastomer has the advantages that abrasion resistance is evidently improved, and the service life is greatly prolonged.
Description
Technical field
The present invention relates to a kind of polyurethane elastomer and its preparation method and application.
Technical background
Reducing silicon wafer thickness is the effective technology measure that reduces silicon materials consumption, reduces the crystal silicon solar battery cost, is the importance of photovoltaic technology progress.Over more than 30 year, solar cell silicon wafer thickness is reduced to 180～200 present μ m from 450～500 μ m in 70 years, has reduced over halfly, and the decrease of silicon materials consumption has played vital role to the solar cell cost.
Multi-wire saw is cutting large diameter silicon monocrystal rod, one of very effective method of control silicon wafer thickness.The multi-line cutting machine (MultiWire Saw) of being a dark horse in recent years with its high production efficiency and piece rate, has the trend that replaces gradually inner circle cutting machine at the large-diameter silicon wafer manufacture field.The cutting mechanism of multi-line cutting machine is different from inside diameter slicer fully, it is with circular knife in the metal Coppered Steel Wire replacement of Φ 0.10-Φ 0.16mm, metal wire is wrapped on the guide roller that is carved with certain slot pitch, device drives guide roller and single crystal rod do relative motion, by the grinding of mortar, the purpose that cooling reaches the mill pellet.Institute's pellet compare with the inner circle slice process have sinuousness, angularity is little, parallelism is good, total thickness tolerance discreteness is little, cutting edge cutting loss is little, the table and affected layer is shallow, the wafer surface roughness is little, is cut material and covers the classes of semiconductors material, such as silicon, germanium, Lithium niobium trioxide, gallium arsenide, phosphatization steel, hard mass, silicon carbide etc.
Guide roller is the thick key part of multi-line cutting machine control silicon chip, and guide roller is the accurate roller of making of macromolecular material, be carved with at its table to be equal to live width, dark V-type groove, during cutting with metal wire on guide roller.Require that its material wear ability will be got well, rigidity wants high, can not be out of shape when the cutting tensioning: width between groove is depended in the control that sheet is thick, width error should be less than 5 μ m between groove, so to material require and working accuracy all very high.
The polyester polyurethane elastomer is compared with General Purpose Rubber has larger physical strength, remarkable wear resistance, outstanding resistance to compression, durometer level is wide, and still has snappiness under high rigidity, and surface smoothness is high, machining property is superior, with metal sticking than General Purpose Rubber high a lot, to have supporting capacity large, mechanical property is excellent, tearing toughness is high, wear-resisting, oil resistant, hardness variable range are large.Therefore the polyester polyurethane elastomer is the raw material that more satisfactory multi-line cutting machine is used guide roller at present.
Yet because silicon chip cutting metal steel wire is to its long-time, high-intensity friction, the polyester polyurethane elastomer is easily wearing and tearing still, even slight wearing and tearing also can affect the degree of depth, the width that is wound with metal raceway, so that metal wire is subjected to displacement, thereby affect the quality of cutting silicon wafer, therefore still need in process of production frequent polyurethane elastomer guide roller, increased production cost.Especially when using diamond wire to replace the plain metal steel wire, it is more obvious to wear and tear, and the life-span of polyurethane elastomer guide roller is shorter.
Summary of the invention
The technical problem to be solved in the present invention is that the wear resistance of existing polyester polyurethane elastomer is not enough.The invention provides a kind of polyurethane elastomer and preparation method thereof, compare with the conventional polyurethanes elastomerics, polyester polyurethane elastomer wear resistance of the present invention is obviously improved, and greatly prolong work-ing life.
The invention provides a kind of polyester polyurethane elastomer, it is characterized in that the chainextender total mass accounts for the 18-20% that gives aggressiveness and chainextender total mass in the preparation process, shore hardness is 98-100HA.
The invention provides a kind of polyester method for preparing polyurethane elastic body, comprise the steps:
(1) gives the preparation of aggressiveness
1. polyester polyols dehydration of alcohols: use molecular weight 1500-2000, hydroxyl value 53-59mgKOH/g dewaters in the container that band stirs after fusing point 40-50 ℃ the polyester heat fused, and dehydration temperaturre is controlled at 100-140 ℃, 3-7mmHg vacuum hydro-extraction 30-60min makes its water content＜0.05%.
For stopped reaction tank heating after making the fully degassed intermittently start-stop whipping appts of pot liquid take out for some time vacuum makes material temperature be down to 70-80 ℃.
2. it is synthetic to give aggressiveness: get polyester, isocyanic ester after the dehydration, both mass ratioes are that 0.64-1 puts into reactor, drying nitrogen protection, 70-90 ℃ of reaction 1-2 hour.
Isocyanic ester is selected from tolylene diisocyanate (TDI), diphenylmethanediisocyanate (MDI), 1,5-naphthalene diisocyanate (NDI), PPDI (PPDI), dimethyl diphenyl vulcabond (TODI), preferred tolylene diisocyanate (TDI).
For preventing that reaction is violent, it is too fast to heat up, give and have refrigerating unit when aggressiveness synthesizes; Polyester can add in batches, makes reaction process steady, and temperature of reaction is easy to control.
3. it is degassed to give aggressiveness: in the A of performed polymer synthesis reaction vessel or casting molding machine batch can under 80-90 ℃ and 3-7mmHg deaeration 30-60min.
(2) casting molding machine cast
Add chainextender in the B batch can, the heating system that starts each component makes A B material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for the 18%-20% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent is preheated to 80-110 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose.
Chainextender is selected from 3,3 '-two chloro-4,4 '-diaminodiphenyl-methane or two adjacent chlorodiphenyl amine methane (MOCA), dimethythiotoluene diamine (DMTDA), 1,4-butyleneglycol, ethylene glycol, hydroquinone two hydroxy ethyl ether (HQEE), preferred 3,3 '-two chloro-4,4 '-diaminodiphenyl-methane or two adjacent chlorodiphenyl amine methane (MOCA).
When 2 cast interval times are longer (surpassing the life-span 1/2 in the still), need with clean-out system (methylene dichloride or trieline) hybrid chamber to be cleaned.A B stoste automatically transfers separately recurrent state to and gets back to separately in the batch can when cast stops.
(3) slaking and aftertreatment
1. in mould, carry out molding sulfuration, 120-140 ℃, 60-120min before the demoulding;
2. continue the heating postcure after the demoulding, temperature slightly is lower than molding sulfuration, and 120-140 ℃, 3-10h.
(4) subzero treatment
-30～-50 ℃ freezing 5-10 hour.
The present invention also provides a kind of application of polyester polyurethane elastomer, and as the silicon chip cutter guide roller, application method is as follows:
(1) gives the preparation of aggressiveness, with polyester method for preparing polyurethane elastic body (1)
(2) casting molding machine cast, in the B of casting molding machine batch can, add the chain extension-crosslinking agent, the heating system that starts each component makes the AB material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for the 18%-20% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent except being assemblied in the mould behind roller core rust cleaning, degreasing, the coating adhesive, is preheated to 80-110 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose.
(3) slaking and aftertreatment are with polyester method for preparing polyurethane elastic body (3)
(4) subzero treatment is with polyester method for preparing polyurethane elastic body (4)
The present invention has improved chainextender content, the corresponding rising of postcure temperature, the material after the postcure has been increased subzero treatment technique.Ordinary process usually uses heating process with the accelerated material strain, and is difficult to expect changing material property by cryogenic freezing.Common polyurethane elastomer shore hardness is 93-95HA, work-ing life during as the silicon chip cutter guide roller is generally in 100 hours, and polyurethane elastomer shore hardness of the present invention can arrive 98-100HA, wear resistance is significantly improved, and can reach 400 hours the work-ing life during as the silicon chip cutter guide roller.Because hardness uprises, the cutter relieving phenomenon that produces when turning V-type groove does not exist substantially, thus the shape that has guaranteed the V-type groove more near theoretical V-type, gauze is more stable more wear-resisting in the V-type groove during slicing machine work, thereby improves the work-ing life of section yield rate guide wheel.
Description of drawings
Fig. 1 polyurethane elastomer guide roller preparation process sketch
Embodiment
Embodiment 1 the inventive method prepares the polyurethane elastomer guide roller
(1) gives the preparation of aggressiveness
1. polyester polyols dehydration of alcohols: use molecular weight 1500-2000, hydroxyl value 53-59mgKOH/g dewaters in the container that band stirs after fusing point 40-50 ℃ the polyester heat fused, and dehydration temperaturre is controlled at 140 ℃, 3mmHg vacuum hydro-extraction 60min makes its water content＜0.05%.For stopped reaction tank heating after making the fully degassed intermittently start-stop whipping appts of pot liquid take out for some time vacuum makes material temperature be down to 70 ℃.
2. it is synthetic to give aggressiveness: get polyester, MDI after the dehydration, both mass ratioes are 1, put into reactor, drying nitrogen protection, 70 ℃ of reactions 1 hour.For preventing that reaction is violent, it is too fast to heat up, give and have refrigerating unit when aggressiveness synthesizes; Polyester adds in batches, makes reaction process steady, and temperature of reaction is easy to control.
3. it is degassed to give aggressiveness: in the performed polymer synthesis reaction vessel under 80 ℃ and 3mmHg deaeration 30min.
(2) casting molding machine cast
Add DMTDA in the B batch can, the heating system that starts each component makes A B material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for 18% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent is preheated to 80 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose.
(3) slaking and aftertreatment
1. in mould, carry out molding sulfuration, 120 ℃, 120min before the demoulding;
2. continue the heating postcure after the demoulding, temperature slightly is lower than molding sulfuration, and 140 ℃, 3h.
(4) subzero treatment
-50 ℃ freezing 5 hours.
This polyurethane elastomer shore hardness is 98HA, and be 410 hours the work-ing life during as the silicon chip cutter guide roller.
Embodiment 2 the inventive method prepare the polyurethane elastomer guide roller
(1) gives the preparation of aggressiveness
1. polyester polyols dehydration of alcohols: use molecular weight 1500-2000, hydroxyl value 53-59mgKOH/g dewaters in the container that band stirs after fusing point 40-50 ℃ the polyester heat fused, and dehydration temperaturre is controlled at 100,7mmHg vacuum hydro-extraction 30min makes its water content＜0.05%.For stopped reaction tank heating after making the fully degassed intermittently start-stop whipping appts of pot liquid take out for some time vacuum makes material temperature be down to 80 ℃.
2. it is synthetic to give aggressiveness: get polyester, TDI after the dehydration, both mass ratioes are 0.64, put into reactor, drying nitrogen protection, 90 ℃ of reactions 2 hours.For preventing that reaction is violent, it is too fast to heat up, give and have refrigerating unit when aggressiveness synthesizes; Polyester adds in batches, makes reaction process steady, and temperature of reaction is easy to control.
3. it is degassed to give aggressiveness: in the A of casting molding machine batch can under 90 ℃ and 7mmHg deaeration 60min.
(2) casting molding machine cast
Add MOCA in the B batch can, the heating system that starts each component makes A B material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for 20% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent is preheated to 110 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose.
(3) slaking and aftertreatment
1. in mould, carry out molding sulfuration, 140 ℃, 60min before the demoulding;
2. continue the heating postcure after the demoulding, temperature slightly is lower than molding sulfuration, and 120 ℃, 10h.
(4) subzero treatment
-30 ℃ freezing 10 hours.
This polyurethane elastomer shore hardness is 100HA, and be 450 hours the work-ing life during as the silicon chip cutter guide roller.
Comparative Examples 1 changes the polyurethane elastomer guide roller for preparing after A, the B material ratio
Other conditions are identical with embodiment 1, and difference is that B material quality accounts for 15% of A, B material quality summation, and the postcure temperature is 110 ℃.Gained polyurethane elastomer shore hardness is 95HA, and be 150 hours the work-ing life during as the silicon chip cutter guide roller.
Comparative Examples 2 is not carried out the polyurethane elastomer guide roller of subzero treatment technique preparation
Other conditions are identical with embodiment 2, and difference is without (4) subzero treatment step.Gained polyurethane elastomer shore hardness is 98HA, and be 200 hours the work-ing life during as the silicon chip cutter guide roller.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, the relevant staff can in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on the specification sheets, must determine its technical scope according to the claim scope.
Claims (6)
1. a polyester method for preparing polyurethane elastic body is characterized in that comprising the steps:
(1) preparation of performed polymer
1. polyester polyols dehydration of alcohols: use molecular weight 1500-2000, hydroxyl value 53-59mgKOH/g dewaters in the container that band stirs after fusing point 40-50 ℃ the polyester heat fused, and dehydration temperaturre is controlled at 100-140 ℃, 3-7mmHg vacuum hydro-extraction 30-60min makes its water content＜0.05%;
2. performed polymer is synthetic: get polyester, isocyanic ester after the dehydration, both mass ratioes are 0.64-1, put into reactor, drying nitrogen protection, 70-90 ℃ of reaction 1-2 hour;
3. performed polymer is degassed: in the A of performed polymer synthesis reaction vessel or casting molding machine batch can under 80-90 ℃ and 3-7mmHg deaeration 30-60min;
(2) casting molding machine cast
Add chainextender in the B batch can, the heating system that starts each component makes A B material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for the 18%-20% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent is preheated to 80-110 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose;
(3) slaking and aftertreatment
1. in mould, carry out molding sulfuration, 140 ℃, 60-120min before the demoulding;
2. continue the heating postcure after the demoulding, temperature slightly is lower than molding sulfuration, and 120 ℃, 3-10h;
(4) subzero treatment
-30～-50 ℃ freezing 5-10 hour.
2. polyester method for preparing polyurethane elastic body claimed in claim 1, it is characterized in that: polyester polyol dehydrating step 1. in, fully degassed for making pot liquid, after intermittently the start-stop whipping appts is taken out for some time vacuum, the heating of stopped reaction tank makes material temperature be down to 70-80 ℃.
3. polyester method for preparing polyurethane elastic body claimed in claim 1, it is characterized in that: isocyanic ester is selected from tolylene diisocyanate, diphenylmethanediisocyanate, 1,5-naphthalene diisocyanate, PPDI, dimethyl diphenyl vulcabond.
4. polyester method for preparing polyurethane elastic body claimed in claim 1 is characterized in that: performed polymer has refrigerating unit when synthetic, and polyester adds in batches.
5. polyester method for preparing polyurethane elastic body claimed in claim 1, it is characterized in that: chainextender is selected from 3,3'-two chloro-4,4'-diaminodiphenyl-methane or two adjacent chlorodiphenyl amine methane, dimethythiotoluene diamine, BDO, ethylene glycol, hydroquinone two hydroxy ethyl ether.
6. the application of a polyester polyurethane elastomer is characterized in that, as the silicon chip cutter guide roller, application method is as follows:
(1) preparation of performed polymer
1. polyester polyols dehydration of alcohols: use molecular weight 1500-2000, hydroxyl value 53-59mgKOH/g dewaters in the container that band stirs after fusing point 40-50 ℃ the polyester heat fused, and dehydration temperaturre is controlled at 100-140 ℃, 3-7mmHg vacuum hydro-extraction 30-60min makes its water content＜0.05%;
2. performed polymer is synthetic: get polyester, isocyanic ester after the dehydration, both mass ratioes are that 0.64-1 puts into reactor, drying nitrogen protection, 70-90 ℃ of reaction 1-2 hour;
3. performed polymer is degassed: in the A of performed polymer synthesis reaction vessel or casting molding machine batch can under 80-90 ℃ and 3-7mmHg deaeration 30-60min;
(2) casting molding machine cast
Add the chain extension-crosslinking agent in the B of casting molding machine batch can, the heating system that starts each component makes A B material all reach separately melt temperature and each self-circulation, by regulating rotating speed and the discharge capacity of volume pump, makes B material quality account for the 18%-20% of A, B material quality summation; Start the cast button, then the AB material makes it to mix by mixing at a high speed in the hybrid chamber of pouring head; Behind the mould and die preheating, coating release agent except being assemblied in the mould behind roller core rust cleaning, degreasing, the coating adhesive, is preheated to 80-110 ℃; When the compound of discharging can not poured into a mould in mould during bubbles in transparent hose;
(3) slaking and aftertreatment
1. in mould, carry out molding sulfuration, 140 ℃, 60-120min before the demoulding;
2. continue the heating postcure after the demoulding, temperature slightly is lower than molding sulfuration, and 120 ℃, 3-10h;
(4) subzero treatment
-30--50 ℃ freezing 5-10 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210064334 CN102604031B (en) | 2012-03-13 | 2012-03-13 | Preparation method and application of polyester polyurethane elastomer |
Applications Claiming Priority (1)
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| CN102942675B (en) * | 2012-12-03 | 2014-07-09 | 山东一诺威聚氨酯股份有限公司 | Double-component polyurethane elastomer composition |
| EP2952531A1 (en) * | 2014-06-02 | 2015-12-09 | Basf Se | Elastic molded parts based on polyurethane |
| CN104212403B (en) * | 2014-09-28 | 2016-09-14 | 东莞宏石功能材料科技有限公司 | A kind of polyurethane hot melt of high rigidity and preparation method thereof |
| CN104894838A (en) * | 2015-06-09 | 2015-09-09 | 苏州威尔德工贸有限公司 | Ti2Cu/polyurethane shell-core shape memory fiber and preparation method thereof |
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| EP3615583B1 (en) * | 2017-04-26 | 2024-06-12 | Basf Se | Process for preparing a polyurethane using a polyester polyol comprising polycyclic aromatic moieties |
| CN107400192A (en) * | 2017-08-29 | 2017-11-28 | 杭州重力脚轮科技有限公司 | A kind of polycaprolactone-type urethane elastomer and its preparation method and application |
| CN108864945A (en) * | 2018-05-11 | 2018-11-23 | 浙江平湖领新材料科技有限公司 | A kind of polyether polyurethane elastomer polishing material and preparation method thereof |
| CN109053992A (en) * | 2018-07-20 | 2018-12-21 | 滁州市玉林聚氨酯有限公司 | A kind of pouring technology of polyurethane elastomer product |
| CN110239009A (en) * | 2019-06-06 | 2019-09-17 | 扬州广泰化纤有限公司 | The preparation method of polyester stick rapid shaping production equipment and polyester stick |
| CN113527626A (en) * | 2021-08-09 | 2021-10-22 | 赣州杜阳塑胶有限公司 | Method for manufacturing rubber wheel of multi-wire cutting machine |
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