CN102850776B - Manufacturing method of polyurethane cyclone accessory - Google Patents
Manufacturing method of polyurethane cyclone accessory Download PDFInfo
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- CN102850776B CN102850776B CN201210348922.2A CN201210348922A CN102850776B CN 102850776 B CN102850776 B CN 102850776B CN 201210348922 A CN201210348922 A CN 201210348922A CN 102850776 B CN102850776 B CN 102850776B
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Abstract
The invention discloses a manufacturing method of a polyurethane cyclone accessory. A component I and a component P with the same formula as the product body are mixed at room temperature to prepare a filler, and the filler is utilized to carry out secondary processing filling in bubbles and pits of the primary product; and by utilizing the characteristic that the primary product surface still has free radicals which are not completely reacted, the filler and the primary product body can be effectively combined together. The peel test proves that the peel strength of the filler is 1-20 MPa. The invention enables the product surface to be smooth and flat, and effectively enhances the physical and mechanical properties of the product. The yield of the product subjected to secondary processing is up to higher than 95%, and is enhanced by nearly 100% as compared with the primary product.
Description
Technical field
The present invention relates to a kind of polyurethane elastomer goods, especially relate to a kind of making method of polyurethane cyclone accessory.
Background technology
Polyurethane cyclone accessory is the one of casting type polyurethane elastomeric article, and casting type polyurethane elastomeric article is through solidifying a kind of goods that generate by cast polyurethane prepolymer in die cavity.But finding that polyurethane prepolymer itself exists bubble, and polyurethane prepolymer also can absorb moisture in air in storage process, wherein-NCO is together with the airborne water generation bubble that reacts, in addition polyurethane prepolymer in two component hybrid reactions to also can creating pockets of air in curing process; When casting, two components mix inflow die cavity impact, also can produce bubble; To the so baroque product that can not pressurize and produce of casting type polyurethane swirler accessory, when cast polyurethane material, be easy to produce bubble at product surface especially.Above-mentioned various reasons causes the larger problem existing in making processes at casting type polyurethane elastomeric article to produce pore on the surface of goods, has caused thus the raising of product substandard products and scrap rate.What be loaded in January, 2007 " Liaoning chemical industry " solves this problem by proposition in Li Wei, Zhang Huibo, Qiu Congping, Gu Xuexian work " Analysis of Common Problems During Synthesis of Polyurethane Elastomer by Prepolemer Method " literary composition from the synthetic and curing molding process of polyurethane prepolymer, but has bubble and depression because many factors can not overcome goods completely in production practice.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of bubble or the depression that can effectively remove goods, reduces the making method of the substandard products of product and the polyurethane cyclone accessory of scrap rate.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of making method of polyurethane cyclone accessory, and it comprises the following steps:
1. prepare I component: (1) is put into ether glycol in baking oven and dissolved (as fusing in summer itself does not just need fusing), after dissolving for liquid completely, put in the first reactor by formula ratio, under stirring, heat to 100--120 DEG C, vacuum hydro-extraction to water content is less than 0.05%, is cooled to 50--60 DEG C after dehydration; (2) at least one in 80/20-tolylene diisocyanate and 4.4 ' mono-diphenylmethanediisocyanates put in baking oven and dissolved (as fusing in summer itself does not just need fusing), after dissolving for liquid completely, drop into the first reactor, in the first reactor, constantly stir, its natural reaction is heated up, and remain at 70 DEG C-90 DEG C and react 2-3 hour; (3) reaction is opened vacuum pump deaeration 1-2 hour after finishing, then close vacuum pump be cooled to 50 DEG C-70 DEG C stand-by;
2. prepare P component: the PTMG that (1) is 1000 the relative molecular weight of formula ratio is put in baking oven and dissolved (as fusing in summer itself does not just need fusing), after dissolving for liquid completely, put in the second reactor, under stirring, heat to 100--120 DEG C; (2) chainextender of formula ratio is dropped in melting tool, put on gas furnace or electric furnace and melt, when chainextender when 2/3 melts, be stirred to fusing (1.4-butyleneglycol does not need to dissolve summer) completely, then chainextender put in the second reactor and constantly stirred 30 minutes; (3) open vacuum pump dehydration 1-3 hour; (4) after dehydration, be cooled to 60 DEG C-80 DEG C, get partially liq from the second reactor and be placed in container, add formula ratio catalyzer, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 80 DEG C-100 DEG C, then dewater, then lower the temperature 50 DEG C-70 DEG C stand-by;
3. from the first reactor and the second reactor respectively Extraction parts I component and P component to put into two temporary container for subsequent use;
4. the mould of goods is put into the baking oven preheating of 100 DEG C-130 DEG C;
5. after the mould of goods being gone out to baking oven, coat releasing agent, treat that die temperature is down to 50 DEG C-90 DEG C, by I:P=100:40～70 mix and blend in casting molding machine by weight of the P component in the I component in the first reactor and the second reactor, and inject die cavity by liquid filling machine;
6. after polyurethane product in mould solidifies completely, goods mould is put into baking oven, vulcanize 40 minutes to 2 hours at 100 DEG C-130 DEG C, go out baking oven, after die sinking, obtain primary products;
7. bubble and the depression on the fabrication hole to primary products, surface are carried out clean;
8. I component for subsequent use in temporary container and P component are mixed and made into stopping by I:P=30-70 at normal temperatures; (or from production process casting molding machine, the material that I component and P component mix and blend flow out is done stopping)
9. stopping is inserted in fabrication hole, bubble and depression, the primary products after filler are vulcanized, then sanding and polishing is obtained end article by stopping filling place.
The ether glycol of step in is 1. at least one or the mixture in PTMG and the polyoxytrimethylene ether glycol that relative molecular weight is 1000 PTMG, relative molecular weight is 2000.
The step 2. chainextender of middle preparation P component is 3,3 ' mono-dichloro-4,4 ' mono-diaminodiphenyl-methanes or 1.4-butyleneglycol or the two mixture.
7. step is carried out clean to surperficial fabrication hole, bubble and the depression of primary products and is referred to by sharp cutter and strike off the bubble in goods, its depression position burr of pruning, then use equating place of degreasing solvent cleaning goods and oil stain, dirt around;
It is to put the primary products after filler into baking oven to vulcanize 1-2 hour at 50-100 DEG C of temperature that step is vulcanized the primary products after filler in 9..
Step 9. middle sanding and polishing is referred to the primary products after filler is cooled to normal temperature more naturally through sulfuration by stopping filling place, then polishes by portable polishing machine or special fine sand skin polished section.
Described degreasing solvent is alcohol or gasoline or methylene dichloride dimethylbenzene.
Step is cooled to 60 DEG C-80 DEG C after 2. preparing step (4) dehydration of P component, get partially liq from the second reactor and be placed in container, adding the mill base of formula ratio to stir merges it to add formula ratio catalyzer completely again, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 80 DEG C-100 DEG C, dewater again, then lower the temperature 60 DEG C-70 DEG C stand-by.
Step is carried out after clean surperficial fabrication hole, bubble and the depression of primary products in 7., and coated with adhesive is again placed more than 30-minute under room temperature situation.
Compared with prior art, the invention has the advantages that being mixed and made at normal temperatures bubble and the depression of stopping to primary products by select to fill a prescription identical with product main body I component and P component carries out secondary processing filling, utilize primary products surface to remain in the not feature of the radical of complete reaction of part, stopping and primary products body can be combined effectively, through degree of peeling off test, expletive stripping strength is between 1-20MPa; Not only make the smooth surface of product smooth, and effectively improved the physical and mechanical properties of product, the finished product rate after secondary processing can reach more than 95 percent, can improve nearly a hundred per cent with respect to primary products.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment mono-: a kind of making method of polyurethane cyclone accessory, it comprises the following steps:
1. prepare I component: (1) is put into ether glycol in the baking oven of 80 DEG C and dissolved, and puts into while stirring in the first reactor after dissolving for liquid completely, heats to 100 DEG C under stirring, and vacuum hydro-extraction to water content is less than 0.05%, is cooled to 50 DEG C after dehydration; (2) 80/20-tolylene diisocyanate is put in baking oven and dissolved, after dissolving for liquid completely, drop into the first reactor by formula ratio, in the first reactor, constantly stir, its natural reaction is heated up, and remain at 90 DEG C and react 2 hours; (3) reaction is opened vacuum pump deaeration 1 hour after finishing, then close vacuum pump be cooled to 60 DEG C stand-by;
2. prepare P component: the PTMG that (1) is 1000 the relative molecular weight of formula ratio is put in the baking oven of 80 DEG C and dissolved, and puts into while stirring in the second reactor after dissolving for liquid completely, heats to 100 DEG C under stirring; (2) chainextender of formula ratio is dropped in melting tool, at 110 DEG C of DEG C of temperature, melt, when the chainextender when 2/3 melts, be stirred to fusing completely, then chainextender is put in the second reactor and constantly stirred 30 minutes; (3) open vacuum pump dehydration 2 hours; (4) after dehydration, be cooled to 80 DEG C, get partially liq from the second reactor and be placed in container, add mill base and the catalyzer of formula ratio, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 100 DEG C, then the deaeration of dewatering, then lower the temperature 60 DEG C stand-by;
3. from the first reactor and the second reactor respectively Extraction parts I component and P component to put into two temporary container for subsequent use;
4. the mould of goods is preheated to 100 DEG C in baking oven;
5. after the mould of goods being gone out to baking oven, coat releasing agent, treat that die temperature is down to 70 DEG C, pour rapidly the P component in the I component in the first reactor and the second reactor in liquid filling machine mix and blend by weight I:P=100:60, and inject die cavity by liquid filling machine;
6. after goods mould urethane solidifies completely, goods mould is put into baking oven, 100 DEG C of sulfurations 2 hours, go out baking oven, after die sinking, obtain primary products;
7. strike off goods bubble by sharp cutter, its depression position burr of pruning, then use equating place of alcohol cleaning article and oil stain around thereof, dirt;
8. I component for subsequent use in temporary container and P component are mixed and made into stopping by I:P=50 at normal temperatures;
9. stopping is inserted in bubble and depression, is put the primary products after filler into baking oven sulfuration, more naturally cool to normal temperature, then by portable polishing machine or special fine sand skin polished section to being polished and obtain end article by stopping filling place.
Embodiment bis-: a kind of making method of polyurethane cyclone accessory, it comprises the following steps:
1. prepare I component: (1) is put into ether glycol in the baking oven of 80 DEG C and dissolved, and puts into while stirring in the first reactor after dissolving for liquid completely, heats to 120 DEG C under stirring, and vacuum hydro-extraction to water content is less than 0.05%, is cooled to 60 DEG C after dehydration; (2) 80/20-tolylene diisocyanate and 4.4 ' mono-diphenylmethanediisocyanates are put in baking oven and dissolved respectively, after dissolving for liquid completely, drop into the first reactor by formula ratio, in the first reactor, constantly stir, its natural reaction is heated up, and remain at 90 DEG C and react 2 hours; (3) reaction is opened vacuum pump deaeration 4 hours after finishing, then close vacuum pump be cooled to 70 DEG C stand-by;
2. prepare P component: the PTMG that (1) is 1000 relative molecular weight is put in the baking oven of 80 DEG C and dissolved, and puts into while stirring in the second reactor after dissolving for liquid completely, heats to 120 DEG C under stirring; (2) chainextender of formula ratio is dropped in melting tool, at 130 DEG C of temperature, melt, when the chainextender when 2/3 melts, be stirred to fusing completely, then chainextender is put in the second reactor and constantly stirred 30 minutes; (3) open vacuum pump dehydration 2 hours; (4) after dehydration, be cooled to 80 DEG C, get partially liq from the second reactor and be placed in container, adding the mill base of formula ratio to stir merges it to add formula ratio catalyzer completely again, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 80 DEG C, deaeration again, then lower the temperature 70 DEG C stand-by;
3. from the first reactor and the second reactor respectively Extraction parts I component and P component to put into two temporary container for subsequent use;
4. the mould of goods is put into the baking oven of 130 DEG C;
5. after the mould of goods being gone out to baking oven, coat releasing agent, treat that die temperature is down to 70 DEG C, by the I:P=100:40 mix and blend in liquid filling machine by weight of the P component in the I component in remaining the first reactor and the second reactor, and inject die cavity by liquid filling machine;
6. after the mould urethane of goods solidifies completely, goods mould is put into baking oven, 130 DEG C of sulfurations 40 minutes, go out baking oven, after die sinking, obtain primary products;
7. strike off the bubble in goods by sharp cutter, its depression position burr of pruning, then use equating place of gasoline cleaning article and oil stain around thereof, dirt;
8. I component for subsequent use in temporary container and P component are mixed and made into stopping by I:P=30 at normal temperatures;
9. stopping is inserted in bubble and depression, put the primary products after filler into baking oven vulcanizes 1 hour at 90 DEG C of temperature, naturally cool to again normal temperature, then by portable polishing machine or special fine sand skin polished section to being polished and obtain end article by stopping filling place.
Embodiment tri-: a kind of making method of polyurethane cyclone accessory, it comprises the following steps:
1. prepare I component: (1) is put into ether glycol in the baking oven of 80 DEG C and dissolved, and puts into while stirring in the first reactor after dissolving for liquid completely, heats to 110 DEG C under stirring, and vacuum hydro-extraction to water content is less than 0.1%, is cooled to 55 DEG C after dehydration; (2) mixture of 80/20-tolylene diisocyanate and 4.4 ' mono-diphenylmethanediisocyanates is put in the baking oven of 60 DEG C and dissolved, after dissolving for liquid completely, drop into the first reactor, in the first reactor, constantly stir, its natural reaction is heated up, and remain at 80 DEG C and react 2 hours; (3) reaction is opened vacuum pump deaeration 3 hours after finishing, then close vacuum pump be cooled to 50 DEG C stand-by;
2. prepare P component: the PTMG that (1) is 1000 the relative molecular weight of formula ratio is put in the baking oven of 70 DEG C and dissolved, and puts into while stirring in the second reactor after dissolving for liquid completely, heats to 110 DEG C under stirring; (2) chainextender of formula ratio is dropped in melting tool, at 140 DEG C of temperature, melt, when the chainextender when 2/3 melts, be stirred to fusing completely, then chainextender is put in the second reactor and constantly stirred 30 minutes; (3) open vacuum pump dehydration 1 hour; (4) after dehydration, be cooled to 70 DEG C, get partially liq from the second reactor and be placed in container, add formula ratio catalyzer, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 100 DEG C, then deaeration, then lower the temperature 65 DEG C stand-by;
3. from the first reactor and the second reactor respectively Extraction parts I component and P component to put into two temporary container for subsequent use;
4. the mould of goods is preheated to 120 DEG C in baking oven;
5. after the mould of goods being gone out to baking oven, coat releasing agent, treat that die temperature is down to 80 DEG C, the P component in the I component in the first reactor and the second reactor, by weight I:P=100:50 mix and blend in liquid filling machine, and is injected to die cavity by liquid filling machine;
6. after urethane in mould solidifies completely, goods mould is put into baking oven, in 120 DEG C, vulcanize 1 hour, go out baking oven, after die sinking, obtain primary products;
7. strike off the bubble in goods by sharp cutter, its depression position burr of pruning, again with alcohol or equating place of gasoline or methylene dichloride dimethylbenzene cleaning article and oil stain, dirt around thereof, coated with adhesive again after alcohol or gasoline or the volatilization of methylene dichloride dimethylbenzene, under room temperature situation, place and within 30 minutes, after tackiness agent is dry, primary products are put into baking oven above and be warmed to 90 degree, then take out primary products;
8. I component for subsequent use in temporary container and P component are mixed and made into stopping by I:P=70 at normal temperatures;
9. stopping is inserted in bubble and depression, after primary products after filler are solidified at normal temperatures, put baking oven into vulcanizes 2 hours at 80 DEG C of temperature again, then the primary products after filler are naturally cooled to normal temperature after sulfuration again, then by portable polishing machine or special fine sand skin polished section to being polished and obtain end article by stopping filling place.
In above-described embodiment, the ether glycol of step in is 1. at least one in PTMG and the polyoxytrimethylene ether glycol that relative molecular weight is 1000 PTMG, relative molecular weight is 2000.The step 2. chainextender of middle preparation P component is 3,3 ' mono-dichloro-4,4 ' mono-diaminodiphenyl-methanes or 1.4-butyleneglycol or the two mixture.
Claims (7)
1. a making method for polyurethane cyclone accessory, is characterized in that it comprises the following steps:
1. prepare I component: (1) is put into ether glycol in baking oven and melted, after being molten into liquid completely, put in the first reactor by its formula ratio, under stirring, heat to 100--120 DEG C, vacuum hydro-extraction to water content is less than 0.05%, is cooled to 40--60 DEG C after dehydration; (2) at least one in 80/20-tolylene diisocyanate and 4.4 ' mono-diphenylmethanediisocyanates put on gas furnace or electric furnace and melted, after being molten into liquid completely, drop into the first reactor by its formula ratio, in the first reactor, constantly stir, its natural reaction is heated up, and remain at 70 DEG C-90 DEG C and react 2-3 hour; (3) reaction is opened vacuum pump deaeration 1-2 hour after finishing, then close vacuum pump be cooled to 50 DEG C-70 DEG C stand-by;
2. prepare P component: the PTMG that (1) is 1000 the relative molecular weight of formula ratio is put in baking oven and melted, after being molten into liquid completely, put in the second reactor by its formula ratio, under stirring, heat to 100--120 DEG C; (2) chainextender of formula ratio is dropped in melting tool, on gas furnace or electric furnace, melt, when the chainextender when 2/3 melts, be stirred to fusing completely, then chainextender is put in the second reactor and constantly stirred 30 minutes; (3) open vacuum pump dehydration 1-3 hour; (4) after dehydration, be cooled to 60 DEG C-80 DEG C, get partially liq from the second reactor and be placed in container, add formula ratio catalyzer, after stirring, put into again the second reactor, in the second reactor, be warmed to while stirring 80 DEG C-100 DEG C, the deaeration of dewatering again, then lower the temperature 60 DEG C-70 DEG C stand-by;
3. from the first reactor and the second reactor respectively Extraction parts I component and P component to put into two temporary container for subsequent use;
4. goods mould is preheated in baking oven to 100 DEG C-130 DEG C;
5. after goods mould being gone out to baking oven, coat releasing agent, treat that die temperature is down to 50 DEG C-100 DEG C, by the P component in the I component in the first reactor and the second reactor by weight I:P=100:40～70 by liquid filling machine mix and blend, inject die cavity;
6. after urethane in mould solidifies completely, the mould of goods is put into baking oven, in 100 DEG C-130 DEG C, vulcanize 40 minutes to 2 hours, go out baking oven, after die sinking, obtain primary products;
7. the surperficial bubble to primary products, depression are carried out clean;
8. I component for subsequent use in temporary container and P component are mixed and made into stopping by I:P=40-70 at normal temperatures;
9. stopping is inserted in bubble and depression, after the primary products after filler are solidified at normal temperatures, vulcanized again, then sanding and polishing is obtained end article by stopping filling place.
2. the making method of a kind of polyurethane cyclone accessory as claimed in claim 1, it is characterized in that ether glycol during step be 1. in relative molecular weight is 1000 PTMG, relative molecular weight is 2000 PTMG and polyoxytrimethylene ether glycol at least one or the two, three's mixture.
3. the making method of a kind of polyurethane cyclone accessory as claimed in claim 1, is characterized in that the chainextender of preparation P component during step is 2. 3,3 ' mono-dichloro-4,4 ' mono-diaminodiphenyl-methanes or 1.4-butyleneglycol or the two mixture.
4. the making method of a kind of polyurethane cyclone accessory as claimed in claim 1,7. the surperficial bubble of primary products and depression are carried out clean and are referred to and cut off the bubble in goods by sharp cutter to it is characterized in that step, its depression position burr of pruning, then use equating place of degreasing solvent cleaning goods and oil stain, dirt around.
5. the making method of a kind of polyurethane cyclone accessory as claimed in claim 1, it is characterized in that the primary products after filler being vulcanized during step is 9. to put the primary products after filler into baking oven to vulcanize 1-2 hour at 50-100 DEG C of temperature.
6. the making method of a kind of polyurethane cyclone accessory as claimed in claim 1, it is characterized in that during step 9., sanding and polishing is referred to naturally cooling to normal temperature after the primary products sulfuration after filler by stopping filling place again, then polish by portable polishing machine or special fine sand skin polished section.
7. the making method of a kind of polyurethane cyclone accessory as claimed in claim 4, is characterized in that described degreasing solvent is alcohol or gasoline or methylene dichloride dimethylbenzene.
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| CN110434684A (en) * | 2019-08-15 | 2019-11-12 | 李启明 | A kind of sanding and polishing method of 5G mobile phone screen and rear cover |
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| CN104941122A (en) * | 2015-06-09 | 2015-09-30 | 南通宝鹏健身器材科技有限公司 | PU material for dumbbell and dumbbell piece and preparing method of PU material |
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| JPH0657007A (en) * | 1992-08-07 | 1994-03-01 | Nippon Shokubai Co Ltd | Method for delustering resin |
| DE102005037972A1 (en) * | 2005-08-11 | 2007-02-22 | Krauss-Maffei Kunststofftechnik Gmbh | Nozzle for spray head |
| CN100482701C (en) * | 2006-12-08 | 2009-04-29 | 陕西科技大学 | Emulsion polymerization process for in-situ preparing nano SiO2/acrylate resin composite paint |
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| CN110434684A (en) * | 2019-08-15 | 2019-11-12 | 李启明 | A kind of sanding and polishing method of 5G mobile phone screen and rear cover |
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Effective date of registration: 20161017 Address after: Hangzhou City, Zhejiang province 311500 Tonglu County Economic Development Zone Tonglu Yin Road No. 69 Patentee after: Hangzhou gravity casters Technology Co., Ltd. Address before: 315191 Zhejiang city of Ningbo province Shanding Jiang Bridge Road No. Patentee before: Ningbo Best Polyurethane Co., Ltd. |