CN102250307A - Biobased micro-porous polyurethane material and preparation method thereof - Google Patents
Biobased micro-porous polyurethane material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a biobased micro-porous polyurethane material and a preparation method thereof. The method comprises a component A preparation process, a component B preparation process and a component A and component B mixing process, wherein the component A preparation process comprises the following steps: stirring 20 to 41 parts by weight of polyether polyol, 3 to 11 parts by weight of chain extender, 0.01 to 0.52 part by weight of water, 0.15 to 0.59 part by weight of silicone oil, and 0.12 to 0.33 part by weight of catalyst for not less than 5 minutes; and degassing under a negative pressure condition until the degree of vacuum does not change any more, and sealing for storage. Compared with the prior art, according to the invention, a pre-polymer method is adopted, MDI (diphenylmethane diisocyanate) with low price, good prepolymer stability and short production period and biobased polyether polyol with environmental friendliness and regenerability are preferably used for preparing a micro-porous elastic body, thus environmental friendliness and use performance are taken into consideration, and the market developing space is great.
Description
Technical field
The invention belongs to the technical field of polymer composite and preparation method thereof, be specifically related to a kind of bio-based microvoid polyurethane material and preparation method.
Background technology
Because the thermotolerance and the weathering resistance of conventional polyurethanes micro-pore elastomer are not good, static resistance is relatively poor, thus need it is carried out modification, to reach requirement.Chinese patent CN101486834A adopts organo montmorillonite to strengthen microporous polyurethane elastomer, effect is apparent in view, but it has adopted 1, and 1-two chloro-1-fluoroethanes (F-141b) are as pneumatogen, this whipping agent has destruction to ozonosphere, so should not use.Chinese patent CN1185501A adopts 10%～60% common mineral clay enhancing railway sleeper slab of polyrethane elastic body, elastomeric weight increases more, and employing is single stage method cast slaking, the granulation technology of extrusion moulding more then, the shortcoming of this method is that soft or hard section and the easy skewness of clay cause elastomerics easily to produce defective, and backing plate is solid, and damping effect is relatively poor.Chinese patent CN100513451C adopts rare gas element to charge into and prepares foamed raw material in the composition that contains prepolymer, polyvalent alcohol, chain propagation agent, inject the mould curing molding then, prepare railway polyurethane foaming body backing plate, though the less employing in this foam aperture inert gas blown cost is higher.Chinese patent CN101381442A discloses a kind of TODI base polyurethane micropore elastomer production method, adopt TODI can obtain good dynamic characteristics, but what adopt is that polyester adipate is soft section an of polyvalent alcohol, relatively poor with this water tolerance as cushioning material, does not reach high ferro with requiring.Chinese patent CN101519485A discloses a kind of wide temperature domain damping polyurethane micropore elastomer material and preparation method thereof, this material can have damping capacity preferably in-20 ℃～+ 50 ℃ scopes, preparation but the tensile strength and the elongation at break of this material is all not high, do not reach the requirement that high ferro is used
Summary of the invention
In order to solve problems such as thermotolerance, weathering resistance, static resistance that existing microcellular polyurethane elastomer exists be not good, the invention provides the high nanometer fibrous wollastonite of a kind of cost performance and carry out bio-based microvoid polyurethane material of modification and preparation method thereof, not only can strengthen toughness reinforcing and improve its thermotolerance and shock resistance resistance to fatigue, also can save production cost.
Concrete technical solution is as follows:
Bio-based microvoid polyurethane material and preparation method thereof: comprise A component preparation section, the preparation section of B component, A component, B component mixed processes:
Described A component preparation section is: with 20-41 weight part polyether glycol, 3-11 weight part chainextender, 0.01-0.52 weight parts water, 0.15-0.59 weight part silicone oil, 0.12-0.33 weight part catalyzer, stirring is not less than 5 minutes, under the situation of negative pressure, outgas then, no longer change until vacuum tightness, sealing is sealed up for safekeeping;
Described polyether glycol is polypropylene glycol-glycerol ether, the poly-succinic-glycerol-propylene glycol that contracts, and preferred functionality is that 3-4 and molecular weight are polypropylene glycol-glycerol ether of 2800-6500.
Described polypropylene glycol-glycerol ether is polypropylene glycol two shrink glycerol ethers, and its model is: EPG-217, manufacturer is: Yantai wide Hue length of schooling product company limited, solid content: 99.9%.
Described chainextender is diol chain-extension agent and diamine chain stretching agent, and diol chain-extension agent is an ethylene glycol, 1,4-butyleneglycol, one or more the mixture in propylene glycol, quinhydrones-two (beta-hydroxyethyl) ether that contracts; Two amine chainextenders are 3,3-two chloro-4, the mixture of one or more in 4-diaminodiphenyl-methane, diformazan sulfenyl tolylene diamine, the diformazan sulfenyl chlorobenzene diethylenetriamine.
Described catalyzer is one or more the mixture in triethylene diamine, stannous octoate, the dibutyl tin laurate.
The preparation section of described B component,
The preparation of described B component comprises following operation steps:
1) be 1 with intercalator by mass ratio with nano-silicon lime stone (fineness is 180,000 orders～1,800 ten thousand orders): 2-1: 11 in 48-85 ℃ of stirring 8-33 hour, with this suspension filtered and reclaim intercalator, put into vacuum drying oven then in 49-72 ℃ of dry 14-41 hour, grind, sieve, obtain the modified Nano wollastonite;
2), with the above-mentioned modified Nano wollastonite of 2.3-9 weight part and 22-31 part water content less than 0.1% biological poly ethoxylated polyhydric alcohol C mixing after, disperseed 1.5-4.3 hour under 950-3100 rev/min stirring in 49-72 ℃, get nano-silicon lime stone/biological poly ethoxylated polyhydric alcohol mixture;
3), with above-mentioned mixture and 28-41 weight part isocyanic ester in 65-87 ℃ of reaction 0.8-3.2 hour, preparation NCO content is the semi prepolymer of 14-28%, the sealing of cooling back is preserved standby;
Described intercalator is one or more the mixture in methyl-sulphoxide, hydrazine, Potassium ethanoate, the ammonium acetate;
Described biological poly ethoxylated polyhydric alcohol C is one or more the mixture from soybean, castor-oil plant, cotton son, manioca and Algae Extract, and preferred molecular weight is the polyether glycol of 950-3200.Its production method is with reference to CN200910018985.
The water content of biological poly ethoxylated polyhydric alcohol C is excessive, will cause reaction to take place not exclusively.
Described polyisocyanates is one or more the mixture in diphenylmethanediisocyanate, liquefaction diphenylmethanediisocyanate, tolylene diisocyanate, the xylylene diisocyanate.
Described A, B component mixed processes:
The temperature of A component and B component is elevated to 34.5-56.7 ℃, it by isocyanate index 1.1 mixed, mixed 1-7 minute at 3900-6400 rev/min, be poured into then in the 43-72 ℃ of mould that scribbles 1.1 parts of releasing agents in advance, the demoulding after the precuring moulding in 4-12 minute, change over to and continue post curing 9-21 hour in the 79-105 ℃ of baking oven, promptly prepare the bio-based microvoid polyurethane material.
Described releasing agent is the aqueous polyurethane parting agent special, and its composition is: polydimethylsiloxane, its concentration is: 6% solution.
Isocyanate index is the excessive degree of isocyanic ester in the ammonia Recipe, represents with letter r usually.
Isocyanate index R=isocyanurate equivalent number/polyvalent alcohol equivalents=(W different/E is different)/(W alcohol/E alcohol)/(W alcohol/E alcohol)+W water/9) }
In the formula: W is different to be the isocyanic ester consumption, and W alcohol is the polyvalent alcohol consumption, and E is different to be isocyanurate equivalent, and E alcohol is the polyvalent alcohol equivalent
The present invention has the following advantages:
1) utilize the mechanism of in-situ polymerization, promptly polyreaction is carried out when nanometer fibrous wollastonite exists, rather than polymerization is added nanometer fibrous wollastonite after finishing again.This method has overcome the autohemagglutination effect of nano-silicon lime stone when disperseing to enter polymeric matrix, the homodisperse that more helps nano material, and nano-dispersed has the ideal adhesiveproperties with the bio-based polyurethane basal body interface, the thermal expansivity of material matrix is complementary, and more helps the raising of product performance.
2) but the present invention add nanometer fibrous wollastonite restriction molecule sub-chain motion and increase the internal friction resistance, thereby improve the spillage of material factor and widen the temperature range of glass transition region, increase the in-fighting of material, and then increase the damping vibration attenuation performance of bio-based polyurethane micro-pore elastomer.
3) the present invention adopts nanometer fibrous wollastonite as properties-correcting agent, wollastonite fibre and polyurethane matrix are connect by hydrogen bond, wafer surface is electric neutrality, the characteristics that no water-swelling, good flowability and dispersiveness etc. are unique, the surface hydroxyl activity is low, can reduce the aging of the polymkeric substance that causes by the wollastonite surface hydroxyl, and cost is lower.
4) the present invention adopts full water foamed and pouring forming technology to prepare this bio-based microvoid polyurethane material, when synthetic, do not use and contain benzene, toluene, N, the solvent that dinethylformamide, ethyl acetate etc. are harmful, and be full water foamed not fluorine-containing haloalkane, environmental protection requirement met.
5) the present invention adopts prepolymer method, preferably prepare micro-pore elastomer with cheap, performed polymer good stability, MDI with short production cycle and biological poly ethoxylated polyhydric alcohol with environmental friendly regenerated performance, taken into account environmental protection and use properties, very big market development space has been arranged.
6) the present invention adopts A, B bicomponent system, can produce at a lower temperature, and two components all can place for some time, stores more stablely, adopts the pouring forming technology simple controllable, constant product quality, and production cost is low.
And the present invention adopts to insert nanometer fibrous wollastonite on the molecule three-dimensional dimension, not only can improve mechanical strength but also can further increase the material shock resistance.
The present invention is adopting chemical interpolation that nano-silicon lime stone cheap and that performance is good is carried out modification, obtained the big and higher organic modified nano wollastonite of insertion rate of fiber spacing, and then nanoparticle is received on the polyurethane backbone by the mode of chemical bond or hydrogen bond, can further improve performance.
The present invention adopts in-situ inserted polymerization and semi-prepolymer method and full water foamed and pouring forming technology to prepare this bio-based microvoid polyurethane material, be that the organic modified nano fibrous wollastonite reacts with part biological based polyether polyol C monomer earlier, again with the semi prepolymer (B component) of polyisocyanates prepared in reaction end NCO base, and then and polyether glycol, whipping agent, chainextender, mixture such as linking agent and catalyzer (A component) reaction, this monomer situ aggregation method can make urethane and organic modified nano fibrous wollastonite reach the compatible of molecular level, the rigidity that makes mineral filler, the toughness of thermotolerance and urethane, it is compound that workability reaches on nano-scale, obtain good comprehensive properties bio-based microvoid polyurethane material nano composite material, thereby preferably resolved the problem that exists in the above-mentioned patent.
Embodiment
Below in conjunction with embodiment the present invention is further described.
The described part of embodiment all refers to weight part.
Embodiment 1
The A component comprises following raw materials according:
22 parts of polypropylene glycols-glycerol ether,
4.2 parts of ethylene glycol,
3,3-two chloro-4,2.6 parts of 4-diaminodiphenyl-methanes,
0.25 part in water,
0.28 part of silicone oil,
Triethylene diamine (A33)/stannous octoate 0.14/0.06 part;
The B component comprises following raw materials according:
2.3 parts of nano-silicon lime stones,
24.3 parts of biological poly ethoxylated polyhydric alcohol C (water content is less than 0.1%),
42 parts of diphenylmethanediisocyanates.
Concrete preparation method is as follows:
A component preparation section: (functionality is 3, and molecular-weight average is 2950, and its model is: EPG-217, manufacturer is: Yantai wide Hue length of schooling product company limited, solid content: 99.9% with 22 parts of polypropylene glycols-glycerol ether.), 4.2 parts of ethylene glycol, 2.6 part 3,3,3-two chloro-4,4, the triethylene diamine solution (A33) of-diaminodiphenyl-methane, 0.25 part of water, 0.28 part of silicone oil, 0.14 part 33% (weight concentration) and 0.06 part of stannous octoate stirred 4.5 minutes in 2900 rev/mins, vacuumize degassing was handled 5 minutes then, and sealing is preserved standby.
B component preparation section: nano-silicon lime stone and methyl-sulphoxide are pressed mass ratio 0.9: 4.5 stirred 22 hours in 58 ℃, with this suspension filtered and reclaim methyl-sulphoxide (can reuse), put into 69 ℃ of vacuum drying ovens then 25 hours, grind, sieve, obtain the modified Nano wollastonite.
Then 2.3 parts of modified Nano wollastonites and 24.3 parts of biological poly ethoxylated polyhydric alcohol C that dewatered (molecular weight is 2500) were disperseed 4 hours under 2500 rev/mins stirring in 58 ℃, get nano-silicon lime stone/biological poly ethoxylated polyhydric alcohol mixture.And then add 42 parts of '-diphenylmethane diisocyanates that melted in 81 ℃ of reactions 1.8 hours, and preparation NCO content is 22% semi prepolymer, the sealing of cooling back is preserved standby.
A, B component mixed processes: the temperature of A component and B component is elevated to 34.5 ℃, it by isocyanate index 1.01 mixed, mixed 2 minutes at 4500 rev/mins, be poured into then in 55 ℃ of moulds that scribble 1 part of releasing agent in advance, the demoulding after the precuring moulding in 6 minutes, change over to and continue post curing 12 hours in 78 ℃ of baking ovens, promptly prepare the bio-based microvoid polyurethane material.
Embodiment 2
The A component comprises following raw materials according:
30 parts of polypropylene glycols-glycerol ether,
One contract 5 parts of propylene glycol,
2 parts of diformazan sulfenyl tolylene diamines,
0.2 part in water,
0.2 part of silicone oil,
Triethylene diamine/dibutyl tin laurate 0.17/0.08 part;
The B component comprises following raw materials according:
3.5 parts of nano-silicon lime stones,
24 parts of biological poly ethoxylated polyhydric alcohol C (water content is less than 0.1%),
35 parts of diphenylmethanediisocyanates.
Concrete preparation method is as follows:
A component preparation section: (functionality is 3 with 30 parts of polypropylene glycols-glycerol ether, molecular-weight average is 4000), 5 part of one propylene glycol that contracts, 2 parts of diformazan sulfenyl tolylene diamines, 0.2 part, 0.2 part silicone oil, triethylene diamine solution (A33) and 0.08 part of composition such as dibutyl tin laurate of 0.17 part 33% stirred 7 minutes in 2000 rev/mins, vacuumize degassing was handled 4 minutes then, and sealing is preserved standby.
B component preparation section: nano-silicon lime stone and liquor kalii acetici are pressed mass ratio 1: 8 stirred 15 hours in 70 ℃, with this suspension filtered and reclaim liquor kalii acetici (can reuse), put into 65 ℃ of vacuum drying ovens then 24 hours, grind, sieve, the nano-silicon lime stone must organise.Then with 3.5 parts organise nano-silicon lime stone and 24 parts biological poly ethoxylated polyhydric alcohol C (molecular weight is 2000) disperseed 3 hours under 1500 rev/mins stirring in 65 ℃, nano-silicon lime stone/polyglycerol mixture.And then add 35 parts of '-diphenylmethane diisocyanates that melted in 85 ℃ of reactions 2.5 hours, and preparation NCO content is 17% semi prepolymer, the sealing of cooling back is preserved standby;
A, B component mixed processes: the temperature of A component and B component is elevated to 40 ℃, it by isocyanate index 1 mixed, mixed 3 minutes at 5000 rev/mins, be poured into then in 50 ℃ of moulds that scribble 1 part of releasing agent in advance, the demoulding after the precuring moulding in 10 minutes, change over to and continue post curing 15 hours in 90 ℃ of baking ovens, promptly prepare the bio-based microvoid polyurethane material.
Embodiment 3
The A component comprises following raw materials according:
40 parts of polypropylene glycols,
1,3.5 parts of 4-butyleneglycols,
1.5 parts of diformazan sulfenyl chlorobenzene diethylenetriamines,
0.4 part in water,
0.35 part of silicone oil,
Triethylene diamine/dibutyl tin laurate 0.23/0.07 part;
The B component comprises following raw materials according:
6 parts of nano-silicon lime stones,
17.95 parts of biological poly ethoxylated polyhydric alcohol C (water content is less than 0.1%),
30 parts of liquefaction diphenylmethanediisocyanates.
Its concrete preparation method is with embodiment 2.
Described material is tested according to following standard:
1. isocyanate group Determination on content in the HG/T 2409-1992 base polyurethane prepolymer for use as;
2. GB/T 10802-1989 flexible urethane foam;
3. the heat insulation rigid urethane foam of using of GB/T 10800-1989 buildings;
More than the technical performance index of prepared material as shown in the table.
Claims (10)
1. bio-based microvoid polyurethane material and preparation method thereof: comprise A component preparation section, the preparation section of B component, A component, B component mixed processes:
Described A component preparation section is: with 20-41 weight part polyether glycol, 3-11 weight part chainextender, 0.01-0.52 weight parts water, 0.15-0.59 weight part silicone oil, 0.12-0.33 weight part catalyzer, stirring is not less than 5 minutes, under the situation of negative pressure, outgas then, no longer change until vacuum tightness, sealing is sealed up for safekeeping.
2. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof, it is characterized in that: described polyether glycol is polypropylene glycol-glycerol ether, the poly-succinic-glycerol-propylene glycol that contracts, and preferred functionality is that 3-4 and molecular weight are polypropylene glycol-glycerol ether of 2800-6500.
3. bio-based microvoid polyurethane material according to claim 2 and preparation method thereof is characterized in that: described polypropylene glycol-glycerol ether is polypropylene glycol two shrink glycerol ethers.
4. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof, it is characterized in that: described chainextender is diol chain-extension agent and diamine chain stretching agent, diol chain-extension agent is an ethylene glycol, 1,4-butyleneglycol, one or more the mixture in propylene glycol, quinhydrones-two (beta-hydroxyethyl) ether that contracts; Two amine chainextenders are 3,3-two chloro-4, the mixture of one or more in 4-diaminodiphenyl-methane, diformazan sulfenyl tolylene diamine, the diformazan sulfenyl chlorobenzene diethylenetriamine.
5. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof is characterized in that: described catalyzer is one or more the mixture in triethylene diamine, stannous octoate, the dibutyl tin laurate.
6. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof is characterized in that: the preparation section of described B component,
The preparation of described B component comprises following operation steps:
1) be 1 with intercalator by mass ratio with nano-silicon lime stone (fineness is 180,000 orders～1,800 ten thousand orders): 2-1: 11 in 48-85 ℃ of stirring 8-33 hour, with this suspension filtered and reclaim intercalator, put into vacuum drying oven then in 49-72 ℃ of dry 14-41 hour, grind, sieve, obtain the modified Nano wollastonite;
2), with the above-mentioned modified Nano wollastonite of 2.3-9 weight part and 22-31 part water content less than 0.1% biological poly ethoxylated polyhydric alcohol C mixing after, disperseed 1.5-4.3 hour under 950-3100 rev/min stirring in 49-72 ℃, get nano-silicon lime stone/biological poly ethoxylated polyhydric alcohol mixture;
3), with above-mentioned mixture and 28-41 weight part isocyanic ester in 65-87 ℃ of reaction 0.8-3.2 hour, preparation NCO content is the semi prepolymer of 14-28%, the sealing of cooling back is preserved standby.
7. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof is characterized in that: described intercalator is one or more the mixture in methyl-sulphoxide, hydrazine, Potassium ethanoate, the ammonium acetate.
8. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof, it is characterized in that: described described biological poly ethoxylated polyhydric alcohol C is one or more the mixture from soybean, castor-oil plant, cotton son, manioca and Algae Extract, and preferred molecular weight is the polyether glycol of 950-3200.
9. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof is characterized in that: described polyisocyanates is one or more the mixture in diphenylmethanediisocyanate, liquefaction diphenylmethanediisocyanate, tolylene diisocyanate, the xylylene diisocyanate.
10. bio-based microvoid polyurethane material according to claim 1 and preparation method thereof is characterized in that: described A, B component mixed processes:
The temperature of A component and B component is elevated to 34.5-56.7 ℃, it by isocyanate index 1.1 mixed, mixed 1-7 minute at 3900-6400 rev/min, be poured into then in the 43-72 ℃ of mould that scribbles 1.1 parts of releasing agents in advance, the demoulding after the precuring moulding in 4-12 minute, change over to and continue post curing 9-21 hour in the 79-105 ℃ of baking oven, get final product.
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| CN102532460A (en) * | 2011-12-14 | 2012-07-04 | 浙江华峰新材料股份有限公司 | Bio-based polyurethane microporous elastomer, preparation method and application thereof |
| CN104371701A (en) * | 2014-12-05 | 2015-02-25 | 奥菲（北京）石油技术有限公司 | Novel environment-friendly shale gas flowback agent |
| CN104877103A (en) * | 2015-06-25 | 2015-09-02 | 淄博德信联邦化学工业有限公司 | Method for manufacturing polyurethane elastomer damping plate for high-speed railway |
| CN106084175A (en) * | 2016-07-19 | 2016-11-09 | 黄伟 | A kind of nano-silicon lime stone bio-based polyurethane composite and preparation method thereof |
| CN110509472A (en) * | 2019-08-29 | 2019-11-29 | 常州轩创汽车内饰件有限公司 | A kind of production technology of polyurethane from skinning |
| CN114164664A (en) * | 2021-12-15 | 2022-03-11 | 盐城市恒丰海绵有限公司 | Preparation process of water-locking cotton |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102532460A (en) * | 2011-12-14 | 2012-07-04 | 浙江华峰新材料股份有限公司 | Bio-based polyurethane microporous elastomer, preparation method and application thereof |
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| CN104371701A (en) * | 2014-12-05 | 2015-02-25 | 奥菲（北京）石油技术有限公司 | Novel environment-friendly shale gas flowback agent |
| CN104877103A (en) * | 2015-06-25 | 2015-09-02 | 淄博德信联邦化学工业有限公司 | Method for manufacturing polyurethane elastomer damping plate for high-speed railway |
| CN104877103B (en) * | 2015-06-25 | 2017-08-08 | 淄博德信联邦化学工业有限公司 | The preparation method of polyurethane elastomer high ferro vibration damper plate |
| CN106084175A (en) * | 2016-07-19 | 2016-11-09 | 黄伟 | A kind of nano-silicon lime stone bio-based polyurethane composite and preparation method thereof |
| CN110509472A (en) * | 2019-08-29 | 2019-11-29 | 常州轩创汽车内饰件有限公司 | A kind of production technology of polyurethane from skinning |
| CN114164664A (en) * | 2021-12-15 | 2022-03-11 | 盐城市恒丰海绵有限公司 | Preparation process of water-locking cotton |
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| CN102250307B (en) | 2012-11-28 |
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